Leo
Part of things
Posts: 30
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Nov 14, 2012 13:26:21 GMT
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Cool stuff going on here, gives me hope for some time in the future as I have never welded anything in my life either and your first efforts look really good (well done!) The inlet plenum looks like some kind of mental exhaust backbox in this pic!!
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English bloke living in Amsterdam.
'92 VW Golf 1.8 CL @ 220,000 km and counting...
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pork
Posted a lot
Posts: 1,662
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Nov 18, 2012 15:04:49 GMT
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Just read through the lot! Lol, making the new manifold is a FAR better idea than the previous one! Welding onto a cast manifold with mild steel MIG wire, results in the liquid steel "sucking out" the graphite from the cast and absorbing it (meaning it's INCREDIBLY hard, and unmalleable!) As soon as it gets hot, it cracks. Same goes for the turbine housing I'm afraid - get it welded up by a pro with an ARC welder, with nickel rods, and it's got a good chance of not cracking again.... still not guaranteed I'm afraid though And as sexy as bike carbs look - it's also 4 times as many carbs to sort the fuelling on, 4 times as much chance of leakage.... plus the plenum isn't going to do much for airflow I'm afraid By all means, you've made it, so give it try! But you may be better off with a single HIF44 (with the restrictor to ensure correct fuelling!) to get all the niggles sorted of ignition timing/exhaust/oil feeds/etc - then maybe going back to bike carbs once pennies allow? Whereabouts are you located? Would love to lend a hand, and share a bit of knowledge with you Cheers for info Never thought this was gunna be easy, but I'm up for the challenge and eager to learn, so no better way really. I'm in Luton if you, or anyone else really fancies lending a hand when it all goes tits up
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pork
Posted a lot
Posts: 1,662
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Nov 18, 2012 15:14:38 GMT
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Also, the bike carb idea was due to the fact these where cheap, £30! If all goes badly I was considering the bike throttle bodies which will fit the same manifold, but converting to EFI will be very costly, plus a little out of my depth
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pork
Posted a lot
Posts: 1,662
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Nov 18, 2012 15:40:09 GMT
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Finished mani
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pork
Posted a lot
Posts: 1,662
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Been having trouble with the fuel pressure overpowering the boost FPR, turns out the return line was to restrictive, so instead of making larger fuel lines and messing about with the fuel tank, I gave making a swirl pot ago so I can have as big a rerun as I'd like So, take one empty co2 bottle Strap a few fittings to it and voila! I tested it on the bench first, before the base pressure was 6psi Now it's barely 1psi Applied pressure via an air compressor to the boost referencing port and the fuel pressure rises accordingly So happy days. The finished product Just hope the old mechanical pump is up to job off supplying the pot
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pork
Posted a lot
Posts: 1,662
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Thanks
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pork
Posted a lot
Posts: 1,662
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Re-jiggered the plenum today, to cold to work outside on other bits Added 45 degree pipe to the runners and moved incoming pipe to centre. Gunna attach BOV to the old inlet on the right Actually fits now
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sowen
Club Retro Rides Member
Posts: 2,245
Club RR Member Number: 24
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Engine bays filling up What's left to do?
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pork
Posted a lot
Posts: 1,662
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Wire in fuel pump to switches, attach new fuel hoses (when purchased) Return line for turbo Gunna have to get bike carbs running right before, then plumb in the boost To cold to be outside working tho
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pork
Posted a lot
Posts: 1,662
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Dec 14, 2012 17:03:05 GMT
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She's alive!!
It was a bit of a struggle, but got there in the end
Need to hook up exhaust tho lol
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luckygti
Posted a lot
I need to try harder!
Posts: 4,912
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Dec 14, 2012 19:53:23 GMT
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Brilliant, that alternator belt looks like it's trying to make a bid for freedom though ;D Sounds mad
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pork
Posted a lot
Posts: 1,662
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Dec 14, 2012 21:23:09 GMT
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Brilliant, that alternator belt looks like it's trying to make a bid for freedom though ;D Sounds mad Haha, oh yeah!! Got now exhaust on yet, coz I'm still yet to sort return oil from turbo! Plus the engineering firm who's making a plate to weld exhaust too, is taking just sweet ole time about it! Only thing I haven't made myself
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nitro
Part of things
Posts: 685
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Well done mate ur getting there when do u recon u will have tge turbo setup on? And ur new inlet mani looks loads better
Keep up tge good work!
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pork
Posted a lot
Posts: 1,662
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Thanks, almost there, just need to sort overfueling on the carbs. The regulator doesn't go down low enough and fuel pisses out the carbs. Once that's done, turbo time!
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Dec 15, 2012 10:14:15 GMT
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Well you have converted me I see micras in a completely different light now
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pork
Posted a lot
Posts: 1,662
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Dec 15, 2012 10:42:41 GMT
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Well you have converted me I see micras in a completely different light now Thanks They are good CHEAP fun
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Dec 16, 2012 22:27:31 GMT
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Pork Ive replied to your pm mate
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Dec 17, 2012 19:09:11 GMT
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Hi, just searching online and stumbled across your build, i have the same setup. biggest prob is they leak fuel at the throttle spindle. can you get sealed bearings for bike carbs?? I would suggest looking into something like this before final fitting. I'm on the hunt myself for something to cure this so will defo point you in the right direction if i find anything. real nice work there BTW! looks fantastic. Are you fitting an AFR? easily the biggest must for a home brew engine. Dynojet needles with moveable clips really help with fuelling too. One last thing I did was to raise the the fuel level in the float bowls a few mm to richen up the mixture throughout the rev range. HTH
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Dec 17, 2012 20:44:56 GMT
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Can't you get some Viton seals on the throttle spindle?
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Click picture for more
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