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gs 400 twin turbo Srt 2weeks?

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Old 10-04-02 | 05:14 PM
  #61  
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well this thread got me way excited (not to chub level, but close). anyway, i gave them (SP) a call and the price quoted was 18 G, for the swap. now thats just a standard 2jz-gte motor. not bpu or apu. so to get to that 600 hp level, you will have to go single and all that other jazz. suprastore advertises a kit that will give 700 crank hp. but it will cost you about 8700 with the necessary fmic. and that figure is only with race gas. without the extra premium, you will "only" get 570. of course you can just go with the bpu for only 1500 and have around 400. so in conclusion, you will still have to spend 30 grand to get 500 hp out of your GS. ya think Mo and the guys did some marketing research before they set their prices


Doc

edit......my math was wrong......the kit is 9700 with fmic and i dint mention the labor to get it installed:eek:

Last edited by DrRick; 10-04-02 at 05:16 PM.
Old 10-04-02 | 05:32 PM
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oh and btw, have you ever looked at the graph for a single. no usuable tq below 3500, but a helluva lot after 4000. i am anxious to see what the graph of a tt 4 liter will look like......
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Old 10-04-02 | 06:09 PM
  #63  
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Originally posted by DrRick
oh and btw, have you ever looked at the graph for a single. no usuable tq below 3500, but a helluva lot after 4000. i am anxious to see what the graph of a tt 4 liter will look like......
You and me both.
I would also love a drive in one :eek: .
Old 10-04-02 | 06:28 PM
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Didn't blitz do a twin SC for the SC430? Wonder if they would do a custom kit like that for the GS430? V8 power and maybe not as bad as 30k? Maybe so
Old 10-04-02 | 07:03 PM
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I kinda figured that. 600 at the rear is like 800 at the crank, and no way you get all of that for $15,000, maybe just parts. It just didn't add up that you could get all of that, and push 600 at the rear for only $15,000. At 95/hr labor rate too? So what is the FINAL tally from SP to get at 600rwhp? I guess that 30K price tag is not all that bad, considering.... Hmmmmm

Remember this is suppose to be a daily driver car, not some dragrace car, it still IS a Lexus. My question is: Can you really can get away, pushing 600rwhp just on the 2JZ-GTE engine alone, no internal upgrades, like forged pistons, bigger injectors, etc; without trashing the engine?
Old 10-04-02 | 07:03 PM
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DrRick,

Hmmm, perhaps the $15k quote was for only the standard 2JZ-GTE swap and no upgrade turbo kit. But hey, that's how I heard it... Sorry everyone if that is so -- my bad.

btw, SupraStore is more than a little overpriced IMO. Using that figure for a turbo upgrade is a bit misleading.

In any case, I still think that the horsepower target can be reached for thousands less than the SRT twin turbo setup. And again I'd like to stress that the 2JZ-GTE has proven itself over the years.

The reason I have doubts about SRT is that I think they have taken shortcuts with the GS3, IS3 turbo kits. My concerns are twofold:

https://www.clublexus.com/forums/sho...threadid=58814

1) Possible Air/Fuel ratio problem:

A turbo car should have about a 12:1 A/F vs. the 14.7:1 on an NA car. I'm not so sure that a piggyback ECU can accomplish this task. It appears by the thread that there is a resolution, so I'll leave it at that.

2) No lowered compression change:

Now this is where I have serious doubts. Turbo cars should have a lower compression than the stock 10.5:1. 8.5:1 is ideal. Although in the thread lexlyf can personally attest to his car running fine for 2 months (which I have no reason to doubt), this is not a good idea for the long haul. Something simple like a thicker head gasket would help...

Now I know that Lee (LexCiting) stated that he is getting stronger pistons con rods, so this point is moot for the twin turbo kit. But I would wonder if other things are compromised like in the other kits...

Also, I would like to counter your point about having "no usuable torque below 3500 rpms." Have you ever driven a single turbo Supra? 3500 comes along pretty quickly... and with the 6 speed MT, you can simply downshift.

Look, I know I'm starting to sound a little like a SRT basher -- but I'm not. I have no loyalties toward any of these shops or kits. Who knows, the tt kit may turn out awesome -- I certainly hope it is for all CL members who purchase it. But hey, let's face it, $30k is a pretty hefty chunk of change (for most people at least) -- so we ought to explore all possible options and problems before giving it the thumbs up.

My .15 (a dime and a nickel)
Old 10-04-02 | 07:07 PM
  #67  
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Remember this is suppose to be a daily driver car, not some dragrace car, it still IS a Lexus. My question is: Can you really can get away, pushing 600rwhp just on the 2JZ-GTE engine alone, no internal upgrades, like forged pistons, bigger injectors, etc; without trashing the engine?
LexCiting,

yes on the internals, but bigger injectors, fuel system needed.
Old 10-04-02 | 07:26 PM
  #68  
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Originally posted by pvmike1

Also, I would like to counter your point about having "no usuable torque below 3500 rpms." Have you ever driven a single turbo Supra? 3500 comes along pretty quickly... and with the 6 speed MT, you can simply downshift.

.......My .15 (a dime and a nickel)
im sure that there is tq down there. but if you have noticed, no single dawg wants to race from a dig. b/c they know that with serious competition they will dig themselves hole that they might not be able to get out of. hell, mariusz was able to take that supra to 60 and it was only bpu+ (twins, not single). i am not argueing either point......actually i guess i am. my point is that although 30 grand may be exhorbitant for twins on a 4, when looking at the alternatives, its not all that bad. i only wish that the SC was still available 370 hp and gobs of low end tq is plenty for me......


Doc

btw.....i caught the tupac "i get around" reference
Old 10-04-02 | 07:27 PM
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lee,

will your numbers be on race gas or regular pump?
Old 10-04-02 | 07:56 PM
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DrRick

Was Mariusz at around 370 rwhp with his SC? A bpu Supra makes anywhere from 350-400 rwhp (amazing isn't it?) I think the Supra would have taken him if it launched correctly though. Heck, even bone stock magazine's can get a 5.1 0-60 out of a Supra.

Too bad SRT doesn't stick with the SC -- I'd be happy with 370 also!

But hey, doowhutchaylike, unless you like gangbangin...
Old 10-04-02 | 08:00 PM
  #71  
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nah, mariusz only had an intake/exhaust, tc and maybe lsd. dont get me wrong, my plans are to get a supra for a 2nd/fun car. for the little amount of money that you can put in them vs the output that you can get out of it, its amazing........


Doc
Old 10-04-02 | 08:16 PM
  #72  
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Originally posted by DrRick


if you have noticed, no single dawg wants to race from a dig. b/c they know that with serious competition they will dig themselves hole that they might not be able to get out of. hell, mariusz was able to take that supra to 60 and it was only bpu+ (twins, not single).
Actually I think the real reason most big power Supras don't like standing start acceleration is the power comes on TOO strong and makes launching VERY tough. On a TC equiped GS400 it is not too dificult to modulate power and leave hard and quick. That is the key... power modulation. Big power Supras are like on/off switches due to a small motor making monster power.
Old 10-04-02 | 08:49 PM
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Originally posted by jpa2400
Didn't blitz do a twin SC for the SC430? Wonder if they would do a custom kit like that for the GS430? V8 power and maybe not as bad as 30k? Maybe so
Yes they have it for the LS430 and SC430, so I believe it will work for the GS430 a well.
Old 10-04-02 | 09:09 PM
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Any idea what that setup runs E-dogg?
Old 10-05-02 | 03:13 AM
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It's good to look over a well thought out debate. I too have some questions as some of you guys that will really be answered when I get my car back.

Two big points that I have stressed to Mo were 1)Cooling and 2) Tranny. We have yet to see how a GS4 tranny will hold up with 600RWHP for everyday use. Personally, I believe this to be a sort of *limitation in the GS. I hope I'm wrong. Cooling can always be taken care of. I think that a lot of people are overlooking this. Why? Consider an auto tranny for a TT Surpa (similar in some ways). For as long as high HP auto Supras existed, this was always a big concern. The tranny would eventually give in. I have spoken with several tuners that use aftermarket tranny rebuilds from places like Level 10 and others. What I saw was that this was always a problem. Without mentioning any names (as Level 10 sponsors these guys) I was advised (by the people they sponsor) against their work. Luckly, we still have people in this world who are honest. Now, this is not to say that Level 10 does not replace the parts, do the labor, and etc. This is to say that there is more to just swapping the parts out for solid components and cooling it better. To date, there is only one auto tranny that exists and has proven itself for the Supra. The good news is that it is made by sound performance and handles over 1K HP reliably. The bad news is that it is not really for the GS and it costs (from what I heard ) 7K+.

I really think that whether it is a single or twins, there is insane power that the v8 can develop. Once you get the pistons, rods, and drop the compression, it will robably be the tranny which will determine whether you will put down 600RWHP or 1400RWHP.

Top that off with pump gas and early spool.......and you have a fun car

A lot of people like to say that full boost is only a down shift away, but those who have been in mid to high HP quick spooling cars and high HP late spooling autos know that the quick spooling cars are always more fun to drive on the street.


I ran several stock Supras as well as a BPU++. Trust me when I say this that the GS4 with a HFI and a TC will do *extremely well in a 0-60.



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