Hi, Looking at purchasing a VL turbo, originally a standard RB30, but converted to turbo. It has ...Forged Pistons, Port Polish, Shaved Head, 1mm Oversized Valves, bored out 40thou, 370cc injectors, ECU remap, front mount. Shaving the head increases the compression ratio.. wouldn't this be a problem with a turbo conversion? thanks guys Some original photos have not been recovered yet.

^^ i would say so.

Yeah it sure does lift the compression. Does the engine have any sort of decompression plate on it?? Jacko

Yeah if it was just an n/a (9.0:1) converted to turbo with a shaved head it would be abit of a worry, but if its been rebuilt with forgies its likely that the comp ratio is low enough that the shaved head will be ok

its obviously had the full shebang...forgies, bored out, ported and polished and oversize valves, it'l be fine and go hard aswell.

My head has had over 1.5mm knocked off it. It's on a n/a bottom end and i've never had a problem. It's all about the tune. Mine made 490rwhp last weekend! Nothing wrong with a bit of compression.

So your running a completely standard na bottom end? Has it been rebuilt or anything? Jacko

Quote: Originally Posted by qic88 So your running a completely standard na bottom end? Has it been rebuilt or anything? Jacko Completly standard 200,000k+, hard to belive aint it and most people dont. I do run 6 extra injectors in the manifold squirting in methanol.

Wow thats an awesome effort man. Do you run anysort of decompression plate??? Jacko

Quote: Originally Posted by qic88 Wow thats an awesome effort man. Do you run anysort of decompression plate??? Jacko No decopression plate. I do have a acl 3 layer head gasket in there but it aint much thicker then a genuine gasket. All about the tune. oh and methanol helps Some original photos have not been recovered yet.

giksix- do u have a picture with the extra 6 injectors in the top?

Quote: Originally Posted by azzaturbo giksix- do u have a picture with the extra 6 injectors in the top? I've got them welded in the manifold directly below the standard ones. They are near imposible to see. Some original photos have not been recovered yet.

Awesome! Somehow I've never heard of running 12 injectors, but thats rad. So, by what you said, does that mean you have an extra cell in the boot for the methanol and running 1, 2 extra pumps and an extra regulator? Show me more pics of the setup if you dont mind.

thats ausome! is it possible to get the injectors tapped into the runners just before the intake ? maybe this will vaporise better too? 6 extra injectors tapped into the runners sounds good to me!

I have a big ****.

what do you mean, they are already tapped into the runners.

lol you could run some nice high comp if you ran methanol, no worries but normal petrol, anything above 9 will limit boost, which is ok if your happy running 3psi :P

Quote: Originally Posted by Magnum06 Awesome! Somehow I've never heard of running 12 injectors, but thats rad. So, by what you said, does that mean you have an extra cell in the boot for the methanol and running 1, 2 extra pumps and an extra regulator? Show me more pics of the setup if you dont mind. Yeah mate, two completely different fuel setups. One for methanol and the other for pump fuel.

Quote: Originally Posted by qiksix Completly standard 200,000k+, hard to belive aint it and most people dont. I do run 6 extra injectors in the manifold squirting in methanol. That will help a lot - methanol will give you an excellent octane boost ) Quote: Originally Posted by misk lol you could run some nice high comp if you ran methanol, no worries but normal petrol, anything above 9 will limit boost, which is ok if your happy running 3psi :P few people here running 7 to 8 psi with no IC on n/a pistons at 9:1 with ULP. Though it is prob close to the limit. For the sheer dollar value, raising CR by a couple of points doesnt give as much power as that same money spent on a better turbo and inlet mods for best flow... Quote: Originally Posted by Spool-Up what do you mean, they are already tapped into the runners. I think he means drilling extra holes/mounts in the single (cyl) runners and adding the methanol injectors there, I'd like to see pics pretty please of the inlet as to where those extra injectors are placed ? Quote: Originally Posted by qiksix I've got them welded in the manifold directly below the standard ones. They are near imposible to see. Yo, thats a "heath robinson" setup, are they timed to coincide by chance ? Quick to do yeah, though I would have done it a bit different, maybe earlier in the stream - and yeah tricky given the factory runner shape/room etc Well done as it runs with good power Some original photos have not been recovered yet.

The heap of sh1t made 350rwhp on 14psi on pump fuel. Didn't really even push the pump fuel tune knowing that i was going to run a bit of methanol.