sowen
Club Retro Rides Member
Posts: 2,245
Club RR Member Number: 24
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Feb 24, 2016 22:09:23 GMT
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This is becoming more of an IVA Q&A thread with added Pop!
Quick question, will the hoodscoop come off for the test as it more or less obliterates forward visibility? Can't remember what's immediately underneath (apart from a massive V8) so don't remember if it was a permanent feature or just for race?
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Feb 24, 2016 22:13:40 GMT
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The hood scoop should be fine, surely? I mean, it could swallow an entire small child, nevermind its head, but it's got rounded edges!  |
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Feb 24, 2016 23:00:08 GMT
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Hood scoop will not be on for the test. Vision is pretty good with it on actually, its only like having a large rearview mirror in the screen. It is however a C&U fail as a restriction on forward vision so it certainly would not pass IVA. A shallow scoop will be made up instead. Yes it is a permanent fixture for normal use though  (6 bolts hold it on) |
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Feb 25, 2016 21:12:01 GMT
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Don't think it will be re registered by June  Only did one run so far - ran like a sick pig (misfire or too lean) for the first 400 feet then picked up so only a miserable 14.01 seconds at 101mph so far. I'm hoping that cost me at least a second as I was expecting a 13 or high 12 for its first pass. With engine & suspension tuning I'm hoping for eventual high 11's. Currently looking at fuel injection as a little treat for the future. Time for some NOS?  ? |
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Koos
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sowen
Club Retro Rides Member
Posts: 2,245
Club RR Member Number: 24
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Feb 25, 2016 22:20:31 GMT
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I thought it would most certainly have to come off for the official business to happen, then back on as a showpiece |
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Feb 25, 2016 22:29:34 GMT
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Have you booked the test yet? We had some vans at work go through the test and it took about 3 months to get a test.
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Feb 26, 2016 21:10:31 GMT
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Still trying to get paperwork together to send off - modifying the car is the quick bit! Usual wait is around 6 weeks. Vans come under a different test I believe.
Not much to report as cold weather has made me lose impetus at the moment, but Hoosier have replied saying they can get me some Pro St radials in 2 weeks for not too much money. Waiting on their confirmation that all info is stamped into tyre sidewalls.
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Mar 10, 2016 16:13:30 GMT
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Took the car to Real Steel today for engine verification - not too easy as they could not see the back of the engine, luckily I had taken my camera and they accepted me photoing the numbers while they watched and checking the camera to read them. Block is now stamped & letter will be in the post soon. Possible bad news though as they can only verify its pre 1986 so it will still be subject to 4.5% CO <1200HC levels and they did not think with my cam that my engine will manage this. They think I will need to change the cam back to std for ther test - this was incredibly depressing to hear as its an engine out job and I really don't want to have to do this. As I have an old exhaust gas analyser I tested it when I got home and was pleased to see that at hot idle I only have 2% CO  This explains the flat spot on accelleration as its too lean, at 2000 rpm it went up to about 2.5% CO. Hopefully my analyser is still fairly accurate and I am ok for emissions. Might try to sneak it down to a local mot station to confirm though.  |
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Frankenhealey
Club Retro Rides Member
And I looked, and behold, a pale horse! And its rider's name was Death
Posts: 3,881
Club RR Member Number: 15
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Mar 10, 2016 16:54:32 GMT
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Good news and bad news, that's about par for the course. Keeping my fingers crossed for you.
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Tales of the Volcano Lair hereFrankenBug - Vulcan Power hereThe Frankenhealey here |
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Phil H
Posted a lot
Posts: 1,448
Club RR Member Number: 133
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Mar 10, 2016 16:56:22 GMT
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Your CO should be OK - best get them to check the HCs though as the could be rather high.. If there's a lot of overlap, you'll end up with a lot of unburnt fuel passing straight through although the CO figures will be workable.
Might be tweakable with ignition timing though - won't be nice to drive but might sneak in emissions wise?
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Last Edit: Mar 10, 2016 16:57:23 GMT by Phil H
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steveg
Posted a lot
Posts: 1,586
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Mar 10, 2016 17:10:17 GMT
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My Mini was a pain emissions wise. It's an 86 one and although the limits aren't very strict it still struggled. You cold get the CO level OKish but the HC levels were a bit high. It's got a lumpy cam and high lift rockers. Raising the idle helped a bit but you can't really do that with an auto especially one with a huge V8 bolted to the front of it.
Would a programmable ignition system like the Aldon one improve things at idle so you could still drive it ? I used to have to limp the mini round the corner, adjust the carb and them it would be fine to drive home.
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Mar 10, 2016 22:57:42 GMT
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Glad to see it's getting closer, even if it is a struggle.
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Mar 10, 2016 23:45:59 GMT
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Cam is only a 268 Comp cam so fairly mild. 110 degree lobe separation. Rockers are roller 1.52:1 (std is 1.5:1) This is very depressing if it can't pass emissions in it's current form. I can raise the tickover level fairly easy as its a 3000 stall converter so it's not got much 'push' at idle. Ignition is MSD so maybe more fuel burnt than std ignition? Someone did mention that disconnecting the vacuum advance pipe could help when tested? The other option is fuel injection bit it's another £1,000 |
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steveg
Posted a lot
Posts: 1,586
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I disconnected the vacuum advance on the Mini and it helped a bit. Only trouble with raising the idle was that I often had to lift the clutch a bit with it in gear to get it to stop. I'm going to be using that engine in something else but I am planing to try programmable ignition to see if I can get it to run a bit better.
Would going back to standard rockers take the edge off a bit ? Probably more expensive than swapping the cam though.
I had an old engine in a car that should have had a cat test. I had the logbook from the old car to prove where the engine was from and that was OK for MOT purposes. You can't get any proof from where the engine came from that way can you ?
Sorry to go on, occasionally I have a good idea the rest of the time just humour me if you can !
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Mar 11, 2016 10:29:48 GMT
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All good info Steveg, not sure whether to go into a dark funk of despair or not yet - depends on the mot station test results when I can get the car to one. Std rockers would actually be a cheap option as it does not require any engine dismantling - something to consider. I'm happy to fit fuel injection for the MOT's as they are 4 years away - less so for the test as all the work (& test) is costing around £3,000 already |
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steveg
Posted a lot
Posts: 1,586
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Mar 11, 2016 11:19:00 GMT
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I'm really going for the biggie in daft suggestions, could you fit a cat in the exhaust ? Not sure how long it would last or how effective it would be but there is nothing to say you can't have one on a pre cat test car. Just found this as I thought I had better read up to see if my daft idea really was. Mainly about cats but they also mention running in rockers with a 1:3 ration apparently. It sounds quite a common problem unfortunately. board.moparts.org/ubbthreads/ubbthreads.php/topics/1002657/re-putting-catalytic-converters-on-old-cars.html |
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Last Edit: Mar 11, 2016 11:34:23 GMT by steveg
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Mar 11, 2016 11:20:39 GMT
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For the MOT you can get away with a lot more, If then engine could pre-date emissions most testers seem to fall on the side on leniancy, on my TR8 as it has some P6 parts that's what it is assumed to be.
The IVA guys will need proof of the engine age though so this is not an option for you.
Also opening up the valve clearances for the test will reduce the overlap and should help with your emissions.
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Mar 11, 2016 13:19:47 GMT
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Thanks guys - you are lifesavers. My heart dropped through my shoes yesterday when they said about changing cams.
Some very interesting reading on that link Steveg - thankyou.
It looks like some dodgy timing and 'loose' valves might well be all it needs.
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mk2cossie
Club Retro Rides Member
Posts: 3,059 
Club RR Member Number: 77
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Mar 11, 2016 13:20:40 GMT
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for the MOT emissions, if it is done as pre 86 (I think from memory) then its up to 4.5% CO and less than 1200ppm for HC. if its not that lairy a cam in there then it should be ok. If its running at 2% currently then it may be running more HC as it will not give a complete burn on a weak mixture and gets essentially a lean misfire Should be easy and quick enough to adjust and set on the MOT bay emissions tester though, even better if the guys there know what carbs are  |
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Mar 11, 2016 13:44:06 GMT
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That's good to hear - I'll need to read up on setting the carb up - adjusting the mixture screws does nothing - which suggests the butterflies are open to far so it's idling on the primaries. Don't want to drill holes in the butterflies until I can confirm this though.
If it weren't for the hassle of the fuel return lines & tank mods (& costs) I'd be tempted to put the FiTech fuel injection on straight away.
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(6 bolts hold it on)
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This explains the flat spot on accelleration as its too lean, at 2000 rpm it went up to about 2.5% CO. Hopefully my analyser is still fairly accurate and I am ok for emissions. Might try to sneak it down to a local mot station to confirm though.
