8v Lovers.

[rossbarry1]

I got a mk2 8v. 2.0l bottom end from a mk3, 1.8 ported polished head, drilled box. Looking to put 4-2-1 manifold and stainless exhaust system if i find one for a decent price, and poly bushes all round next.

[golf_mk3VR6]

I got a mk2 8v. 2.0l bottom end from a mk3, 1.8 ported polished head, drilled box. Looking to put 4-2-1 manifold and stainless exhaust system if i find one for a decent price, and poly bushes all round next.

Any difference in HP?
How about the mileage?
Let me get this straight: you have a 2.0 mk3 engine and a 1.8mk2 head? is that posible?

[Stooza]

Yes its a common mod. pretty much a straight swap with a bit of ditributor gear swapping and breather blanking etc involved. Done properly you can see 150bhp and a fair bit more torque. Start gas flowing and port matching, cam, exhaust and breathing mods will show you 170bhp ish, maybe a bit more. Im heading all that way myself with a few extra tweeks hoping for an overly optomistic 200 bhp target. Its a big experiment but I will see how it turns out lol

[danny_p]

100 bhp/ltr  with an 8 valve has been done ( even with counterflow heads but crossflow dose it easyer )

you need

fully forged bottom end,  and bloody ell balanced.
fandango big end and main bearings.

a serious cyl head,  massive valves, amazing portwork, lightweight titanium valve gear,  very stiff valve springs and a 300+ degree cam  and custom made tuned length tubular manifold

a bloody good set of direct to head throttel bodys with standoff injectors and a fancy ecu.

or boost or no2  both are much cheeper  or do the sensible thing if gouing for those numbes NA and use a 16v or 20v

[Stooza]

Well first of all I will be balancing the whole engine, porting, polishing, bigger valves with internal strengthening. Exhaust has been made. Engine is currently 2 litre but Im kicking the ball around about whether to go to 2.1 or not. Im also in a big debate about the fueling method to be used.. my co builder loves carbs and wants to go that way but I am yet to be convinced! As its a bit of a track day experiment, it may evolve several times and eventually we will fit a 20v motor. Interesting to see what 2 blokes can squeeze out of an 8v lump tho.. which is what its all about for us

[Wayne]

Well first of all I will be balancing the whole engine, porting, polishing, bigger valves with internal strengthening. Exhaust has been made. Engine is currently 2 litre but Im kicking the ball around about whether to go to 2.1 or not. Im also in a big debate about the fueling method to be used.. my co builder loves carbs and wants to go that way but I am yet to be convinced! As its a bit of a track day experiment, it may evolve several times and eventually we will fit a 20v motor. Interesting to see what 2 blokes can squeeze out of an 8v lump tho.. which is what its all about for us

I would not go 2.1 as it limits the revs.

[g60gerry]

  Have an 8v 2.0 in my mk1 full blown turbo, est 240bhp 260ftlb at 11psi