I know I'm demanding but you dont have a boost graph for that aswell do you martyn Please

 

Daz I just looked at your new graph as compared to my very old one and yours spools slower than mine, is that the .82 housing? or is it the heads and cams??

 

I'm on full boost at around 3600rpm on the road, where was your old one spooling?

 

Lol, anything else ?

 

LOL Thanks very much Martyn.

Spools up a little later than mine. I just love the driveability of mine and I dont want to lose the response it has. So it's good to see what difference cams make and where spool up changes.

Cheers for the info

 

May be a stupid question, but if you had for example a GT35R, one with .63 housing and one with .82 housing.....what difference does the housings make?

 

agree with that, what bollocks....

 

Hi Chris,

mine is a GT3076 hybrid, with a 0.82 housing it was a 550 bhp turbo suitable for a 2.5.

On mine it spooled at 5800 rpm...

Now have a 0.62 housing on thanks to Andy @ AET-Turbos and it spools at 4000 rpm now.

So a large A/R ratio is good for a large displacement motor, a smaller housing is better for a small displacement motor. BUT the smaller housing will restrict the maximum flow ( = power ) at the top end.

All IMHO.

dunx

 

I have a 2.35 using a ej22t cdb and forged internals. Heads have Supertech valves & retainers, bronze valve guide and Prodrive rally cams. Lots of other supporting mods too but the turbo is a AFP MD32T1T. This is all in a V4 STi Type R.

Drives relatively lag free, but then I have rotated the inlet and shortened the FMIC pipe-work. Not sure how much difference this actually makes but I have it done mainly for aesthetic reason.

No idea on actual power but estimated in the region of 450/450 with the turbo running out of blow. T is a big limiting factor with the heads and bottom end capable of so much more. The good news is that I can do a turbo change to a V or maybe go rotated and should easily cope.

However, I have no plans to do this at the moment as she is a beastie on the road... maybe I’m just not man enough....

 

Thanks for the input, i think that sort of power would be plenty for me!
Would standard sti v4 heads that i have on my original engine be capable of that power?

 

Great thread, very interesting reading

 

There is a 2.2 cdb for sale in the for sale section

Tony

 

I know Tony but still waiting on the outcome of a claim so my hands are tied at the moment so just trying to get some ideas together.
Thanks for the heads up though
Cheers,
James.

 

v4 STi heads, cams, valves etc are all well capable at 450+. To be honest, I'm not really making use of them running just the T. But I took the old 'whilst they're off' approach with the potential to just upgrade the turbo later on.

 

Nice one, thanks for that.

So maybe for a 2.1 a 0.62 housing would be better suited?