i have a sti v7 with a 20g bolted on sure it,s fast but looking for something more ie. 2.33 or 2.5 and stick with the 20g which one of the engine would be the best one to go for. i really dont want to upgrade the turbo so looking at sticking with the 20g but gain more torque and bhp while retaining the fast spool.

 

speak to enginetuner about thier 2.1 stroker, or do a search on here, lots of good things being said, and does what you're after...........

 

i thought that the 2.1 stroker kit would be a waste of money surely i wont get much more power out of 100cc with my 20g thats why i thought the 2.33 or 2.5.

which engine are you running your 20g with beef on the bone also what figures did you get if you don,t mind me asking.

 

2.35 for huge bhp and high revving engine, 2.5 for a lazy torque engine, but both are wasted on the 20g ...you need a better turbo

 

It isn't the extra 100cc as much as the extra stroke. The difference is much more than you'd think, offering better torque and spool from any turbo. The 2.5 won't stand more than 350 bhp without going forged as well, and the EJ22 blocks are great, but cost a packet.
If you were thinking of rebuilding the engine anyway, I'd say definitely take a look at the 2.1, although the result will offer more potential than the 20g will give you. The S-CDB on your V7 would be good up to 500 bhp with the stroker kit and a higher spec turbo such as an S206.

 

So how much do you want to spend is the starting question.
The 20g still makes the basis of a very fast road car with a larger capacity engine.
Cost effective routes are the 2.1 rebuild - as Alan mentions - or drop in forged engines on a std 2.5 short block.
Both should offer near 400 hp and over 400 lbft on a 20g.
You'll still need some other supporting mods.
Is this the kind of output you want?

 

money isn,t a problem butty but yes as you have stated either a 2.33 or 2.5 forged block with the 20g and strangle it for power so that i have a fast road setup

 

If its an open cheque book then ditch the 20g, go for a block to handle 600hp plus all the other extras factored in.

There has to be some target, either cost or power, otherwise it can all go very wrong......

 

I would go for a forged 2.35 if funds is unlimited ...that way you are future proof against any further mods

 

ok i,am going with the 2.5 forged block and looking for 450/450 just a couple of questions i need answered guys please

1.which turbo
2.uprated headers or oem headers and uppipe
3.injectors
4.clutch
5.caik
6. ecutek remap or haltech

if there is anything that i have missed please add many thanks

 

1: MD321T or MD321T+
2: GT spec 2 manifold and up pipe
3: 740cc injectors
4: exedy twin plate
5: large K&N filter
5: Ecutek or if money is no object either a Syvecs or Simtek

 

cheers banny i,am going to order a 2.5 block from the stealers and have it forged i,am still waiting on mark from lateral getting me a price for a forged unit also and see how much of a difference there is in price

 

If you are going for a turbo at 450 bhp plus you would be best with tubular headers as sold by Lateral, RCMS, myself and others. Around £400 delivered.

 

thanx harvey i,ll keep you in mind