My Ihi Turbo Is Dead !! Help With New Turbo Please

[ibizacupra]

lol.just look at the picture

Yawn,.,,,,

 

[ryan_s3]

So guys if he bought an 18g and run it at 340 bhp what kinda boost will it be running..? 1.0bar maybe

around 1.2bar?a guess though

 

[ibizacupra]

some light reading :

http://seatcupra.net/forums/archive/index.php?t-62555.html

 

[ryan_s3]

john banks,now with me on the dark side,420bhp in his standard internalled evo 9. good link though.

 

[Wilko]

around 1.2bar?a guess though

1.4-1.5 bar on a small port just like the ihi. 1.8 bar to max the compresser flow out.

 

[ryan_s3]

suprised that the 18g can't shift more air at 1.5bar than a vf34 but if wilko says it i guess it's true.

 

[Wilko]

suprised that the 18g can't shift more air at 1.5bar than a vf34 but if wilko says it i guess it's true.

The amount of air you can fit into the cylinders is dictated by the capacity and the pressure at the valves. The only advantage a bigger turbo will give you is a slightly cooler charge, so 1-2% more air at best. It's a common fallacy banded around by idiots.

The power gains are in less exhaust backpressure on the pistons on the exhaust stroke

Bigger turbos make more power as they can move more air. The pressure at the intake is a function of volumetric flow and cylinder capacity, assuming volumetric efficiency is constant.

 

[ibizacupra]

and a 65lb comp wheel running 2.5bar boost shifts a lot of air.

 

[barnsley]

come on then people so what do i do fit the same one or go bigger

 

[Craig!]

That choice can only be made by you and your budget. Owen Developments turbo to suit the 20VT engine is £1575.00, you'll need to make a new TIP and possibly (although not 100% as the manifold they used was warped them skimmed flat) need to trim the head castings a little.

You'll also require 550cc or 750cc injectors and you'll need to find someone to map it, not to mention anything over 340bhp will need valves and rods.

It all depends on how far you want to go.