Car Choice...

NvrFstEnuff · 01-25-2006, 10:48 PM

So I could even get the TT car and even just make it one big turbo. Turbo lag would then come into play obviously just don't know how much it would cause. This is all great info guys keep it coming, I dont even know if ill be comfortable in a supra but Im going to wait until my 97 Cobra is sold before I start looking. Its either this car or an 04 Cobra now which would be a great car but there are so many around here and Im starting to bore with them. I do understand the idea behind the sequential TT setup what I meant was that the car is setup TT'd from the factory so going with bigger turbo's wouldn't be that much of an undertaking. Sorry for the confusing post. Hell Id be happy with an 11 second daily driver and then I can turn it up to try for 10s on the weekends at the track. Something like that in my area would be a car no one would go after I know that. Mostly stock/slightly modded cars 12 sec+ and bad mouth'd drivers.

The driveline on this car seems almost limitless for what I want it for, but am I correct in saying the stock 2jz driveline differs greatly from the 2jz gte driveline?

pwpanas · 01-25-2006, 11:34 PM

Quote:

Originally Posted by NvrFstEnuff

So I could even get the TT car and even just make it one big turbo. Turbo lag would then come into play obviously just don't know how much it would cause...

If you converted to a single turbo, additional lag may not be as big an issue as you might think. Note that there have been some advances in turbocharger technology since mid-to-late '92 when the Mkiv Supra's oem twins were spec'd. For example, if you got a modern-day single turbo that was exactly twice the flow capacity of one of the oem twins, there would be more lag than with the oem twins operating in sequential mode, but less lag than the oem twins operating in parallel.

Quote:

Originally Posted by NvrFstEnuff

...I do understand the idea behind the sequential TT setup what I meant was that the car is setup TT'd from the factory so going with bigger turbo's wouldn't be that much of an undertaking...

Unfortunately you're wrong there. The Mkiv Supra's oem twins are two very custom twins squeezed into a very tight configuration. Replacing them with a bigger pair while still preserving the sequential operation is just not feasible.

Quote:

Originally Posted by NvrFstEnuff

...The driveline on this car seems almost limitless for what I want it for, but am I correct in saying the stock 2jz driveline differs greatly from the 2jz gte driveline?

Yes. To be more precise, the 2jz-ge driveline differs greatly from the 2jz-gte driveline.

NvrFstEnuff · 01-26-2006, 03:07 AM

Cool man your really helping me out. Personally I didnt like the idea of the "sequential" anyways. Seems as if there would be a slight or even larger downtime where the boost drops for a bit then spools back up with the second one. What size are the stock turbo's on them now? I was thinking of going with a 60-70mm single and just keep the boodt at a low/moderate level for around 400 on the street which I used to do in my 89 mustang gt, and that was great. But come track time I want to turn it up a bit more to around 500+ if possible.

pwpanas · 01-26-2006, 03:24 AM

Quote:

Originally Posted by NvrFstEnuff

Cool man your really helping me out. Personally I didnt like the idea of the "sequential" anyways. Seems as if there would be a slight or even larger downtime where the boost drops for a bit then spools back up with the second one...

Toyota invested a LOT of resources to make the sequential transition as smooth as possible. There is a separate actuator for the prespool...and the oem fuel & timing curves have been extensively 'tweaked' too. Oh, and it doesn't spool back up with the second one after the transition...it spools back up with both.

Quote:

Originally Posted by NvrFstEnuff

...What size are the stock turbo's on them now?...

CT12B's.

Quote:

Originally Posted by NvrFstEnuff

...I was thinking of going with a 60-70mm single and just keep the boodt at a low/moderate level for around 400 on the street...But come track time I want to turn it up a bit more to around 500+ if possible.

You don't need a 70mm turbo to make 500rwhp...a 60 would be fine.

NvrFstEnuff · 01-26-2006, 03:40 AM

Would a 60mm handle putting the car within 9 seconds of a 1/4 mile as long as the driving/rest of the car is supported with the proper equipment to handle the power.

pwpanas · 01-26-2006, 03:46 AM

Quote:

Originally Posted by NvrFstEnuff

Would a 60mm handle putting the car within 9 seconds of a 1/4 mile as long as the driving/rest of the car is supported with the proper equipment to handle the power.

No...not unless you're spraying LOTS and LOTS and LOTS of nos too...

NvrFstEnuff · 01-26-2006, 03:50 AM

I was under the assumption 650rwhp is good for at least high 10s with the right driving/all else. Arent the 60mm's from Hks/Greddy good for 750 max..or is that Flywheel max?

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01-25-2006, 10:48 PM	#1
NvrFstEnuff Stock Join Date: Jan 2006 Posts: 11	So I could even get the TT car and even just make it one big turbo. Turbo lag would then come into play obviously just don't know how much it would cause. This is all great info guys keep it coming, I dont even know if ill be comfortable in a supra but Im going to wait until my 97 Cobra is sold before I start looking. Its either this car or an 04 Cobra now which would be a great car but there are so many around here and Im starting to bore with them. I do understand the idea behind the sequential TT setup what I meant was that the car is setup TT'd from the factory so going with bigger turbo's wouldn't be that much of an undertaking. Sorry for the confusing post. Hell Id be happy with an 11 second daily driver and then I can turn it up to try for 10s on the weekends at the track. Something like that in my area would be a car no one would go after I know that. Mostly stock/slightly modded cars 12 sec+ and bad mouth'd drivers. The driveline on this car seems almost limitless for what I want it for, but am I correct in saying the stock 2jz driveline differs greatly from the 2jz gte driveline?

01-26-2006, 03:07 AM	#3
NvrFstEnuff Stock Join Date: Jan 2006 Posts: 11	Cool man your really helping me out. Personally I didnt like the idea of the "sequential" anyways. Seems as if there would be a slight or even larger downtime where the boost drops for a bit then spools back up with the second one. What size are the stock turbo's on them now? I was thinking of going with a 60-70mm single and just keep the boodt at a low/moderate level for around 400 on the street which I used to do in my 89 mustang gt, and that was great. But come track time I want to turn it up a bit more to around 500+ if possible.

01-26-2006, 03:40 AM	#5
NvrFstEnuff Stock Join Date: Jan 2006 Posts: 11	Would a 60mm handle putting the car within 9 seconds of a 1/4 mile as long as the driving/rest of the car is supported with the proper equipment to handle the power.

01-26-2006, 03:50 AM	#7
NvrFstEnuff Stock Join Date: Jan 2006 Posts: 11	I was under the assumption 650rwhp is good for at least high 10s with the right driving/all else. Arent the 60mm's from Hks/Greddy good for 750 max..or is that Flywheel max?