Jays High HP S2 Project

[Krists]

The R versions of all the garrett turbos are the ball bearing versions (as opposed to journal bearings iirc).
So GT40 is plain old journal bearing turbo. GT40R is ball bearing version of the same turbo.
It gives slightly earlier spoolup . Around ~600 rpm for a turbo of that size but ball bearing turbos can also wear much faster apparently

What a heck are you guys talking about? There is no such a thing like GT3071 without ball-bearing center section! There's only GT3071R and that's it!

[4WheelDrifter]

Mate stick with a 3071R or 3076R ( GT30R ) boost is acheived before 4krpm with these turbos and then pulls to redline.

GT42R is too big a turbo, Sal had a GT35/40 and it was too laggy and he reduced it to a 3076 ( GT30R ) and he was allot happier with that.

If you want around 500-550 then go for the GT35/40 ala Audiman but be prepared for a bit of lag.

Actually, Sal went for a GT3082R (GT30/40R) after the GT3582R (GT35/40R) I've seen them with my own eyes. They use the same compressor.

Audiman's car makes about 0.5 bar @ 3k rpm IIRC, it's hard to tell when it really kicks in, but it's around 4.5k rpm.

If you're going for solid lifters and so on, then you'll be wanting a turbo that can still make boost at 8k, 9k, 10k or however much you decide to rev it. Otherwise you're probably just as well to stick with the hydraulic lifters, smaller turbo and settle for a lower power band.

What do you plan on using the car for? And have you experienced a <500bhp car? It's not for the faint hearted, that's for sure!

[Jay]

What do you plan on using the car for? And have you experienced a <500bhp car? It's not for the faint hearted, that's for sure!

Cheer for the info 4WheelDrifter, this is what I wanted!

And re the above quote, I have in both road cars (M5 and various tuned Porsches) and race and rally cars inc Audi A2 Paris Daka rally car, 6R4, Maclaren Cam Am etc etc most of these race cars are what I both worked on and drove as part of a race team.... have you ever tried the furosity of accelaration from a pure 560 brake Cam Am weighing just the wrong side of 1000kg

As for the use this will be my daily drive lol but the GT3 for proper sunny day blasts :mischeif:

I am looking at pegging the rpm at aroung the 8-8200 rpm and BHP of 600ish but a little voice keeps telling me more basicly I havent desided.

Jay

[SR71]

As for the use this will be my daily drive lol but the GT3 for proper sunny day blasts :mischeif:
Jay

Hehehehe.



Nice one mate.

[Jon441cc]

Turbo choice is always a compromise, if you want boost by 2.5k and you want to rev it to 8.2k, there is no turbo in the world which will be capable of supplying that sort of rev range and air flow for 500+ hp.
If 500+ hp is your goal then i think you will have to live with the lag or go with a stroker motor.
Sounds like a cool project keep us all posted on the progress.

[4WheelDrifter]

Cheer for the info 4WheelDrifter, this is what I wanted!

And re the above quote, I have in both road cars (M5 and various tuned Porsches) and race and rally cars inc Audi A2 Paris Daka rally car, 6R4, Maclaren Cam Am etc etc most of these race cars are what I both worked on and drove as part of a race team.... have you ever tried the furosity of accelaration from a pure 560 brake Cam Am weighing just the wrong side of 1000kg

As for the use this will be my daily drive lol but the GT3 for proper sunny day blasts

I am looking at pegging the rpm at aroung the 8-8200 rpm and BHP of 600ish but a little voice keeps telling me more basicly I havent desided.

Jay

600bhp should be fine as a daily driver then. I was just checking. I think it would be too much for me personally, but I'm told you soon get used to it after a while. I think the GT35/42R is a good choice, but don't take my word for it. Do your research, as it is a very important decision.

As Jon says there is no magic turbo. You have a limited power band with a single turbo setup.

Maybe you need a car like this: :mischeif:

[Jay]

Cheers SR71 I thought that bring a smile to your face, hows the 996 turbo going?

yeah 4WheelDrifter the choice is like a wife something you have to live with and all its faults

That thang is cool, I dont think it pretty but if I had more time thats the look I would go for, super clean... razor sharp.... now you got me thinking.... might have to release some more money for this project:mischeif: may be the Duccati 1098 will have to wait a month or two.

I am already getting quotes on a alloy roll cage (possibly going through the bulk head to the front top stut mounts as per A2 rally car!)and I would like carbon door panels. Alacantara roof lining, GT3 carbon seats going to now look into totally clearing the engine and bay of clutter... clean, clear and shiney is the way to go and pos stip out the interior to gleaming paint!

STOP GIVING ME IDEAS (joke, keep em coming!)

Jay

[SR71]

996TT?

I'm hoping to collect in May.

Sold the 12R today. With me on it, power:weight ratio is ~650hp/ton. Not quite LHD_Kid turbo'ed Blackbird territory but enough to hit a genuine 190+mph on ~1 mile of track.

I have to confess that the stock 996TT feels slow after this but I doubt it'll be stock for long.

I like a bit of Ruf.

Hehehehe.

[jogi730]

ok.... my old setup I used T34. This turbo for a road car was great and gave 390bhp. 27.5 psi running at 2500rpm, with the RS2 Em I really did not know what lag was.
i'm now running a Turbonetics T61. 25psi is achieved at around 4000rpm and then just pulls and pulls - rev limiter has been hit in 5th.
Both setups put a smile on my face but being honest I miss drivability in London of the old setup. But.... when on song the new setup is just something else. Shame best of both worlds cannot be had. And am very confused what is best.
I currently have 530bhp which i can easily increase (600+) by adding bigger exhaust valves to the head - just need to enjoy current setup first and sort out thast damn IM!
The choice is yours, but as you say, power is a drug and only serves to confuse.
Cheers
Chris

[Jay]

jogi730 have you changed your name (jogi530) with out wanting to offend why the change are you after more BHP also what are you reving yours too now???

Ruf is cool so is Gambella SR71 (blackbird??) sorry to here the bikes gone too may be next year you can have both in your garage

4WheelDrifter what was that car? doent look like any Volvo I have ever seen

Jay

[T2Andy]

RUFs are the daddy remember the yellow bird.

[s2dude]

opel manta iirc

[Jay]

O yes at the ring in 'Fasinazion' or something like that

Have you seen there blue bird there doing the demo laps for customers? the fat bloke looks like he is going to puke then you see all the smoke over his shoulder and you realise why... the drivers the man.... and the car...WOW

Jay

[T2Andy]

is there a link to the blue bird demmo

[Jay]

I found it on the tunertrader site, under videos... porsche. I will have a look tomorrow but it well woth seeing, dare I say it...prob better than the yellow bird???

Jay