mat88
Yorkshire and The Humber
Posts: 1,542
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Sept 27, 2020 15:47:37 GMT
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Not much done this weekend unfortunately.. between adulting parenting and general life I've been a bit busy.. did manage to get the downpipe fully back on. And my mate popped up to see how it was going.. even with both of us on the job the exhaust won't go back on with the reworked downpipe  The only way round it was to cut it at the first bend under the car and allow the back box to sit were it's happy and the front pipe to sit where it's happy. Need to bring the metal glue gun home from work AGAIN to make 2 bits back into 1! Still least it's going in right direction. And since my mate hasn't heard it whilst it's had an exhaust on it it would have been rude not to give him a little demonstration.. wanted to take him round the block in it. But today isn't that day unfortunately... Sounds good tho....  Anyways. Hopefully get it summat like finished this week all being well.. Cheers |
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mat88
Yorkshire and The Humber
Posts: 1,542
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Is it done yet...  in a word no.... Plague has hit. the kids are snotty dribbling messes and been up half the night most nights. The Mrs has started with it now so it's only a matter of time til I'm struck down.. So with that in mind decided I best crack on.. needed to get the exhaust back into 1 piece after chopping it about for the new downpipe layout. My mate came up to give me a hand and as much as its a lot easier with two people holding it in place, it's still awful with the car a foot of the floor. Most of it was done with no mask on as I simply couldn't get under the car with it on.. so needless to say the welding isn't pretty!! It is tucked up out the way loads better than it was tho so maybe it won't ground out as easy.. maybe.. THIS IS THE LAST EXHAUST I'm EVER MAKING WITHOUT A RAMP OR AT LEAST A PIT! there, we have it in writing  Next up the dump valve, Chinese special turned up. Seems to seal ok. And looks like it should work.   Needed to get the outlet welded to an ally boost pipe. Called in a favour from a mate, few days later the boost pipe is back with the outlet nicely tigged on.. Chucked the boost pipe back on and fitted the dump valve up, just need to grab a t piece for the vaccum line tomorrow    As you can see I've been doing my favourite thing and working in the dark... Again... All being well if I'm home from work tomorrow in time it's test drive time.. new wastegate. New exhaust. New dump valve. If it all goes to plan il chuck the new bigger intercooler on over the weekend and it can go back for mapping next week. So based on my current run of success, it won't go well and mapping will be another month away haha. Anyways. More soon |
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mat88
Yorkshire and The Humber
Posts: 1,542
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No photos with this update I'm afraid... And no shonky videos either.. but I've just got back from test driving it and we'll.... It works!!!!!!!
Wastegate seems to work if not a little too well as my Chinese guage is indicating around 5psi. Tbh I'm not 100% sure what spring is in it as it came pre fitted with the selection of others in the box. So that's Something for me to have a play with.
But the good news is it makes the indicated 5psi. Then sits there. Rock solid doesn't move at all!! So I'd call that a win..
The screamer pipe off the external gate sounds.... Well.... Mental as expected.
And the Chinese dump valve seems to be doing its job as all pipes are currently still attached!!!
This is possibly the first post I've done, without a "but"...
Well, the exhaust still touches occasionally but guess il just have to live with that for now.
Fingers crossed I can get my big front mount intercooler fitted over the weekend. Then back to John so he can make it make exciting noises!! And hopefully a dollop more power.
Would like to be cracking on with it now but sadly needs must and been an adult/parent is the order of the day for the rest of the day.
Stay tuned haha
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Woo hoo ! Result (albeit finally) !!
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mat88
Yorkshire and The Humber
Posts: 1,542
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Not much to report unfortunately.. most of my weekend was spent dealing with this utter Bullplop  Yeah, that's the lintel above the kitchen window holding front of my house up. Snapped in half then plastered over... Don't you just love previous owners Anyways rant over. Back to things with wheels, didn't get any actual work done. However on one of my adult missions to aldi over weekend I grabbed this. Trickle charger fast charger (well 5amp) recovery mode and 6/12volt for a tenner. Will do to keep things topped up whilst it's parked up..  Did manage to speak to John at the mappers,told him about my wastegate and my new 5psi limit.. I wondered if the order of the day was to run it at that and bleed off the extra to make 7/8psi or change the spring.. as expected he said I'm better running a higher psi spring rather than relying on bleeding it off. As much as that's not a problem as I've a full selection of springs, it means taking the gate off again which is a bit of a pain in the  since it's upside down under the car... once I've done it tho he's happy to have the car back straight away Anyways. Enough waffle, hopefully il get an hour on it tomorrow.. Maybe. |
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mat88
Yorkshire and The Humber
Posts: 1,542
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Well up before the alarm this morning. Normal people, have a coffee and some breakfast and relax before a busy day at work.. this idiot, up dressed and on the drive for half 6 to get the wastegate off!! Can't say I'm not committed Took the wastegate to work, had 5 mins spare on dinner so got the springs swapped. It came with a 7psi fitted however it was only making around 5psi.. also came with a 3psi spring in the box so using spurious maths reckoned that should end up around 7/8psi  Thats the chart that comes with the gate with the selection of springs..  Once I got it in bits, it became properly obvious why there so much more ermm expensive haha. It's a really really nice bit of kit, little touches like the the top and bottom of the housing cut out so they lock together and the diaphragm being lower than the top of the gate so it can't be disturbed when your changing springs. Guess with summat like this you get what you pay for.  And the springs in question..  Had builders coming to quote for the repairs on the house that Jack built, however since they weren't there as long as I'd expected (they were early and seemed to know what there doing which is a first for tradesmen I've tried dealing with recently) only one thing for it. Get the gate chucked back on and take it for a test drive.. Now I've had some silly Cars in the past, some properly quick stuff (330bhp skylines, 270bhp mx5 turbos etc etc) but instantly this feels different league. I know I've driven vans for the past few years but the performance is frantic shal we say haha. To the point if you just stamp on he throttle in 1st 2nd 3rd and 4th it lights the back tyres up (old 215 profile budgets won't be helping granted).. I did manage to film a little bit on my " closed private road". That's 4th gear from not much more than 10mph up hill.. doesn't look that impressive in the vid but I can confirm its nimble... it also sounds absolutely mega!!! And the point of all this... I nearly forgot haha. New combination of springs sits the boost at roughly 7/8 psi. And holds it rock steady. So happy days!! Need to get my big front mount chucked on now, then it can go back to John.. tbh I might not get chance before Friday afternoon. But I'm finishing early so virgin can come and install the new TV gubbins. So hopefully il get time then. Cheers |
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That would lose me my licence
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Sounds like you've created a monster, top effort.
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mat88
Yorkshire and The Humber
Posts: 1,542
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That would lose me my licence I'm not convinced it won't lose me mine.. think it may need to be used in anger on track when it's "finished"... The "private" roads I use for testing aren't particularly forgiving or flat haha |
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mat88, i've followed this thread with interest as I know very little about turbo charging, could you explain (in laymans terms) what this means: Did manage to speak to John at the mappers,told him about my wastegate and my new 5psi limit.. I wondered if the order of the day was to run it at that and bleed off the extra to make 7/8psi or change the spring.. as expected he said I'm better running a higher psi spring rather than relying on bleeding it off. As much as that's not a problem as I've a full selection of springs, it means Does the wastegate not hold pressure at 5PSI in this instance like a pressure relief valve? What do you mean by bleed off to make 7/8psi? Sorry for the questions but I am intrested to learn.
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To go a bit olde english - Odds fish !! That's ducking awesome !! Plod is going to need air support to catch you !!!
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mat88
Yorkshire and The Humber
Posts: 1,542
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mat88, i've followed this thread with interest as I know very little about turbo charging, could you explain (in laymans terms) what this means: Did manage to speak to John at the mappers,told him about my wastegate and my new 5psi limit.. I wondered if the order of the day was to run it at that and bleed off the extra to make 7/8psi or change the spring.. as expected he said I'm better running a higher psi spring rather than relying on bleeding it off. As much as that's not a problem as I've a full selection of springs, it means Does the wastegate not hold pressure at 5PSI in this instance like a pressure relief valve? What do you mean by bleed off to make 7/8psi? Sorry for the questions but I am intrested to learn. Il do my best to explain, I'm learning as I go with all this external wastegate stuff. It's not black magic but it does seem to take a bit of getting your head round... (Well it has me haha).. In simple terms (not trying to dumb it down just trying to explain in easiest way I can). The external wastegate goes in the link pipe before the turbo, it's basically just a valve that diverts exhaust gas away from the turbo to regulate how fast it spins and hence regulate the boost.. it has a feed line to the wastegate from the inlet manifold so when the gate sees any given amount of boost (determined by the spring fitted) it opens the valve and the turbo maintains whatever given speed hence boost.. Onto mine, I had a "7psi" spring fitted. But there only a guide as such.. so even tho it should have made 7psi then opened it was actually opening around 5psi. So the car was making 5psi (indicated on the Chinese boost gauge) but no more. With regards the bleeding off bit.. the pressure feed line from inlet to the wastegate (that tells it to open) has got a solenoid boost valve jobby plumbed inline with it. So I can bleed pressure off at the valve before the pressure reaches the wastegate and hence make more overall boost than the spring should allow.. in an ideal world you want it to make purely the amount of boost that the spring in the gate is set at. But if you end up needing more boost you can bleed it off pre wastegate to make more I think that makes sense. But it could be proper waffle and make no sense at all haha |
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mat88
Yorkshire and The Humber
Posts: 1,542
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To go a bit olde english - Odds fish !! That's ducking awesome !! Plod is going to need air support to catch you !!! I should be easy to catch when it's wedged in the hedge bottom when the boost has overcome the 5 year old budget tyres that are on it haha. Definitely going to need to have my sensible head on when its mapped tho |
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lebowski
Part of things
Hillman Avenger, Clan Clover
Posts: 488
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Il do my best to explain, I'm learning as I go with all this external wastegate stuff. It's not black magic but it does seem to take a bit of getting your head round... (Well it has me haha).. In simple terms (not trying to dumb it down just trying to explain in easiest way I can). The external wastegate goes in the link pipe before the turbo, it's basically just a valve that diverts exhaust gas away from the turbo to regulate how fast it spins and hence regulate the boost.. it has a feed line to the wastegate from the inlet manifold so when the gate sees any given amount of boost (determined by the spring fitted) it opens the valve and the turbo maintains whatever given speed hence boost.. Onto mine, I had a "7psi" spring fitted. But there only a guide as such.. so even tho it should have made 7psi then opened it was actually opening around 5psi. So the car was making 5psi (indicated on the Chinese boost gauge) but no more. With regards the bleeding off bit.. the pressure feed line from inlet to the wastegate (that tells it to open) has got a solenoid boost valve jobby plumbed inline with it. So I can bleed pressure off at the valve before the pressure reaches the wastegate and hence make more overall boost than the spring should allow.. in an ideal world you want it to make purely the amount of boost that the spring in the gate is set at. But if you end up needing more boost you can bleed it off pre wastegate to make more I think that makes sense. But it could be proper waffle and make no sense at all haha Personally I prefer to use a lighter wastegate spring and use the boost control. My setup uses a 7psi actuator and then the boost control bleeds it away wherever I want, to provide currently up to 15psi. It means that at small throttle angles I can have low boost (base wastegate pressure of 7psi) and at higher throttle angles I can bleed off as much as I like. So I get 15psi at full throttle, 7psi at light throttle and it's mapped in between to give a gradual rise vs. throttle angle. The main advantage for me (apart from good driveability) was that I was seeing a lot of boost in motorway cruise conditions, which had a dreadful effect on fuel consumption, because the ECU thinks you're flogging it. Fitting the lower rated wastegate means I see less boost where I don't want it. I doubt it'll be a problem for you though because you have a single throttle body feeding a plenum, so will probably see vacuum under light throttle conditions. With one throttle per cylinder it's more of a problem. |
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Adey
Posted a lot
Posts: 1,442
Club RR Member Number: 171
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OMFG! that noise now. a little sex wee came out
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mat88
Yorkshire and The Humber
Posts: 1,542
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Il do my best to explain, I'm learning as I go with all this external wastegate stuff. It's not black magic but it does seem to take a bit of getting your head round... (Well it has me haha).. In simple terms (not trying to dumb it down just trying to explain in easiest way I can). The external wastegate goes in the link pipe before the turbo, it's basically just a valve that diverts exhaust gas away from the turbo to regulate how fast it spins and hence regulate the boost.. it has a feed line to the wastegate from the inlet manifold so when the gate sees any given amount of boost (determined by the spring fitted) it opens the valve and the turbo maintains whatever given speed hence boost.. Onto mine, I had a "7psi" spring fitted. But there only a guide as such.. so even tho it should have made 7psi then opened it was actually opening around 5psi. So the car was making 5psi (indicated on the Chinese boost gauge) but no more. With regards the bleeding off bit.. the pressure feed line from inlet to the wastegate (that tells it to open) has got a solenoid boost valve jobby plumbed inline with it. So I can bleed pressure off at the valve before the pressure reaches the wastegate and hence make more overall boost than the spring should allow.. in an ideal world you want it to make purely the amount of boost that the spring in the gate is set at. But if you end up needing more boost you can bleed it off pre wastegate to make more I think that makes sense. But it could be proper waffle and make no sense at all haha Personally I prefer to use a lighter wastegate spring and use the boost control. My setup uses a 7psi actuator and then the boost control bleeds it away wherever I want, to provide currently up to 15psi. It means that at small throttle angles I can have low boost (base wastegate pressure of 7psi) and at higher throttle angles I can bleed off as much as I like. So I get 15psi at full throttle, 7psi at light throttle and it's mapped in between to give a gradual rise vs. throttle angle. The main advantage for me (apart from good driveability) was that I was seeing a lot of boost in motorway cruise conditions, which had a dreadful effect on fuel consumption, because the ECU thinks you're flogging it. Fitting the lower rated wastegate means I see less boost where I don't want it. I doubt it'll be a problem for you though because you have a single throttle body feeding a plenum, so will probably see vacuum under light throttle conditions. With one throttle per cylinder it's more of a problem. As much as I fully agree with what your saying 100% I'm only wanting to run the 7/8 psi for now. My clutch isn't going to be happy at much more (maybe not even at that tbh).. it has been discussed that later down the line wel use the solenoid to bleed off the boost to attain a higher overall boost pressure plus run more boost at higher throttle position. And like you say on the vaccum front. It's in vaccum at light throttle well the Chinese gauge says it is haha |
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mat88
Yorkshire and The Humber
Posts: 1,542
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OMFG! that noise now. a little sex wee came out Good innit!! Phone really doesn't do it justice.. I came back from the test drive last night grinning like a child and may have even had a celebratory beer on a school night!! |
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Yes!! Great work, dude. What a noise!!
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mat88
Yorkshire and The Humber
Posts: 1,542
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Yes!! Great work, dude. What a noise!! Cheers. Soon as it's mapped properly and I've a willing passenger il get a proper video and a fly past too! |
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mat88
Yorkshire and The Humber
Posts: 1,542
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Soooooo. It was all going so well. Except when it wasn't. But now it is.. isnt it.. Well to start with yesterday's builders came back with my price. I'm glad I was sat down when they gave me the price that's all I'm saying.. lets just say I'm in the wrong trade  .. so moan over back to the lexarse. Now you may remember few pages back I got a massive fmic to replace the small one I've got fitted.. I'm sure once I start making power the small one isn't going to be too happy keeping the temps in check.. However I never really measured it and just assumed I could make it fit.. however it would appear my assumption has landed me in trouble again haha. Offered it up tonight, and we'll. Yeah. It's nothing like going to fit..  I knew it was roughly twice as tall. But it's also thicker, wider, just bigger in every way. Cock! Even with the bumper chopped out, it's not going to fit. It won't sit in the same space as the current one since the front cross member thing is in the way, the pipe work is going to need altering since it's longer between outlets. And yeah not ideal.. The only way I'm going to do it is by making my own cross member, I'm also going to have to move the rad back to somewhere near its original position (remember all them pages back when I chopped the front off and moved it all forwards, yeah needs to go back now).. and I'm not prepared to do all that work a, outside and b, In the dark and c, before mapping.. I know it's not ideal, but if the inlet temps are what hold the power back, then so be it. I just want to be able to drive the damn thing! So with that in mind it's "done" again.. version 2.78 haha. Going to speak to John tomorrow with a view of getting the car over to him early next week. And see what let's go first, the clutch, the prop, or the Wuhan war whistle Anyways. Cheers for the positive feedback. Fingers crossed there's an exciting update soon |
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in a word no.... Plague has hit. the kids are snotty dribbling messes and been up half the night most nights. The Mrs has started with it now so it's only a matter of time til I'm struck down.. 
.. so moan over back to the lexarse.