doing a 2.0 8v turbo. need help!!

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Originally Posted by SR-supernova

cheapist way of doing it and bit of a boge way tbh would be to addapt a standard exhaust mani to fit a turbo t25 or similar, as for managment MF2 sigcon and use a 5th injector to sort fuel, get a de-compresion plate made up and sort the oil return pipes, if you can get hold of somone who is handy with a pipebender and a welder it would help alot! then just buy a universal boost pipe kit of egay, should be fine, try and source a ic second hand off here or similar, dv, boost gauge, and air fuel ratio so you can map the mf2 this is done with adjusting a screw so no dyno needed, and could be set up over a weekend, thats bout it! aslong as boost stays below 9psi your probs safe with that.

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or you go look at the link i placed, order youre c20ne turbo kit there, order youre decompression plate there etc etc.

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Originally Posted by craig green

Sounds like uber-bodgery. I always say hats off to barn-style conversions, but seriously, if you are going to cut corners with every aspect of a build like this, its barely worth wasting the time & money on parts.

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wouldnt say that ! theres fook all wrong with 8v turbos
www.vaux-extreme.com/td/10.9.wmv

if i was the o.p i'd ask mr screamer. he owns the fastest astra mk2 in th uk right now, and guess what, it runs a 2.0 8v turbo. look at the site above, all youll get on here is the let brigade insisting its a crap idea.

2 headgaskets, cream injectors, rising rate fpr, 4 branch flange weld on whatever manifold you like (we used erst and kkk) drill drain hole on front of block, get oil line made from back of block by pump. Had t4 running 16psi on this setup. Mk2 astra ran 15.0 at pod with slipping clutch.

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Originally Posted by craig green

Pretty sure there has been a few instances of people using the LET pistons in an SEH though..... Maybe ditch the NE head?

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Craig i thought the Issac Hunt nova used LET pistons, so you could be right!

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Originally Posted by screamer69

wouldnt say that ! theres fook all wrong with 8v turbos
www.vaux-extreme.com/td/10.9.wmv

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I've had an 8v turbo. You clearly havent grasped what I was getting at, or read the subsequent posts that led me to that comment.

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Originally Posted by dan16v

Craig i thought the Issac Hunt nova used LET pistons, so you could be right!

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let bottom end 8v head , standalone engine mani and gas :)

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Originally Posted by craig green

I've had an 8v turbo. You clearly havent grasped what I was getting at, or read the subsequent posts that led me to that comment.

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i only read the last few post :)

just to clear a few things up as i carnt be bothered quoting everthing

1. let pistons work fine ,and so do z20 let pistons
2. you carnt drop a 16v head on a 8v bottom end ( bent valves )
3. oil feed from the back of the block as theres choice of 2 grub screws to take the oil feed from


the c20get was 8.0:1 c/r with a larger inlet manifold with a t25/28 ( carnt remember the turbo ) other than that it was basically a 20ne and the power was 170 bhp and would bolt straight into one of our cars :)


standard ne /seh pistons/rods will see over 21 psi boost if on standalone
machined ne piston with 2 stage regulator will see 12 psi with a large intercooler


the 2 gasket way is ok if you run low boost but its not the best way of doing things but it does work