A20NFT Astra J vxr engine

#21
I think it might have been poor mapping, it was over 350bhp, however it has been pointed out that some A20NFT engines have forged pistons, this one clearly did not.

Perhaps GM are trying to save a few quid and now use cheaper pistons (n)
 
#24
it's been a while but I have made a start on porting the A20NFT cylinder head and inlet manifold

inlet manifold done :)
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I have seen a few threads about porting the LNF head and it seems to be a bit 'hit and miss' with opening up the inlet ports

So I made a start on the inlets, if it works great, if not I will stick the original head back on :LOL:
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#27
so three years later the cylinder head is finally finished :LOL:

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head had a light skim to clean it up, they also did 3 angle valve seats and lapped in the valves

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brand new OEM valve stem oil seals fitted

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and complete

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evocarlos

Stupid Bollocks
Staff
#29
This will now be fitted to my vxr, got to purchase a few goodies before it can be fitted, like pistons and rods :D
im saving up for bigger valves and bronze guides will be aiming for 450bhp with an efr and 4x4 :) got a head from a astra vxr but it needed some cleaning :confused: and it got 2 bent valves in #1
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#30
I think 425-450 would be perfect.

My plan is a hybrid turbo, ported head and inlet, ported throttle body, ProAlloy chargecooler and a 3" non-res exhaust system. Coupled with my Courtenay intake and Cobra downpipe. Stage 3 clutch will also be needed. Plus Wiseco pistons and Molnar steel rods.
 
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