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Old 03-14-2007, 11:09 PM   #11
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Quote:
Originally Posted by WhisPer
no actually in the meth system failing while you are on highboost or something along those lines I have heard about quite a bit.
I agree that if you get a meth+water injection system, you shouldn't get the cheapest one out there. It's like almost everything else - you pretty much get what you pay for. A good system with electronic safeguards, properly installed & maintaintained, won't fail in a pinch. The best system I'm aware of is by alkycontrol.
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Old 03-14-2007, 11:13 PM   #12
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Quote:
Originally Posted by WhisPer
...Yes I agree suspension is very imprtant. Do you think some adj. shocks with a lowering spring would be sufficient or just a full adj. coilover system? I also might get a front and rear sway bar and a few strut bars..
For the applications you're describing, the oem mkiv tt suspension would do just fine. If you simply must lower the car for looks, sure a full set of coilovers and sway bars would be nice, but until you're extremely experienced driving your Supra, you probably won't be able to take advantage of those suspension components.
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Originally Posted by WhisPer
...Also I was wondering how the clutch is on a mkiv does it hold power well?...
No, the oem clutch holds only about 375rwhp or so, reliably, depending on how hard you drive it...fwiw mine failed about 5K miles after I went bpu, and I'd put over 40k miles on it with oem boost.
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Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.


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Old 03-14-2007, 11:24 PM   #13
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Quote:
Originally Posted by pwpanas
I agree that if you get a meth+water injection system, you shouldn't get the cheapest one out there. It's like almost everything else - you pretty much get what you pay for. A good system with electronic safeguards, properly installed & maintaintained, won't fail in a pinch. The best system I'm aware of is by alkycontrol.
cool, so what do most people do run race fuel or alky? and about how much boost is alky good for?
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Old 03-15-2007, 12:06 AM   #14
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Also I just wanted to clarify a few things
I will be using it as a daily driver and a weekend racer.
I want it mostly for autox, road racing, street driving and the occasional street racing ( highway pulls / 1/4 from a dig and rolling start etc.) the only palce I really want it to strive is for road racing or any type of course racing, but still have the option too do any of the other things I listed. Also I just recently blew an engine on a car and I do not EVER want this too happen again so I will be extra careful whenever I get a supra for example, If the stock fuel system can handle 500rwhp I will only take it up to 450rwp just to be extra careful. I do not ever want to deal with any blown parts again my current car has had enough for a life time, blowen wastegate gaskets, valve cover gasket and cracked piston sleeve . So maybe this can help you too help me to ultimetly determine what upgrade path I need to go for. Also would a 75 or 100shot of nitrous be a good idea? because nitrous kits are so freaking cheap for the amount of hp you get, thanks.
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Old 03-15-2007, 11:15 AM   #15
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Quote:
Originally Posted by WhisPer
cool, so what do most people do run race fuel or alky?...
The short answer to your question is that both systems are popular. The long answer is that it kind of depends on your application...for extremely high boost & drag racing, most run pure race fuel (either c16 or vp120).

Quote:
Originally Posted by WhisPer
...and about how much boost is alky good for?
Most systems are good for at least 24psi (which is a huge jump from the 14psi you can run with 91). There are high-flow alky systems that are probably good for 28psi+.
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Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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Old 03-15-2007, 11:24 AM   #16
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Quote:
Originally Posted by WhisPer
...I just recently blew an engine on a car and I do not EVER want this too happen again so I will be extra careful whenever I get a supra for example, If the stock fuel system can handle 500rwhp I will only take it up to 450rwp just to be extra careful...
Good plan!

Quote:
Originally Posted by WhisPer
...I do not ever want to deal with any blown parts again my current car has had enough for a life time, blowen wastegate gaskets, valve cover gasket and cracked piston sleeve . So maybe this can help you too help me to ultimetly determine what upgrade path I need to go for...
You picked a great platform with the Mkiv Supra Turbo. It's 2jz-gte engine is an absolute rock, with proper tuning and sufficient octane to match the boost level. The record rwhp for the oem shortblock, bone-stock, is over 1000rwhp (that's almost 1200hp at the crank)! In other words, if you follow the rules (i.e. if you don't ever run medium-high or high boost on pump gas), it's actually pretty unlikely that you'll ever blow up your 2jz-gte.

Quote:
Originally Posted by WhisPer
...Also would a 75 or 100shot of nitrous be a good idea? ...
In general, yes...especially for drag racing.

Quote:
Originally Posted by WhisPer
...because nitrous kits are so freaking cheap for the amount of hp you get, thanks.
I wouldn't do nitrous just because it's cheap...because if you do nitrous properly, it's actually not that cheap. When you price in the cost of a wet kit (not dry), automatic electronic rpm limits, purge kit, separate test switches for your fuel solenoids, in-dash electronic nitrous pressure gauge, bottle blanket, plus proper installation, testing & tuning, it isn't what I'd call a cheap proposition. Again, I do recommend it in general, but only if you do it right.
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Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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Old 03-16-2007, 07:13 AM   #17
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I might run low boost on 91 so somewhere around 13-14 psi right? and I will run highboost on 100 octane


wouldn't do nitrous just because it's cheap...because if you do nitrous properly, it's actually not that cheap. When you price in the cost of a wet kit (not dry), automatic electronic rpm limits, purge kit, separate test switches for your fuel solenoids, in-dash electronic nitrous pressure gauge, bottle blanket, plus proper installation, testing & tuning, it isn't what I'd call a cheap proposition. Again, I do recommend it in general, but only if you do it right


Well I would just buy a wet kit thats it, you dont need a purge kit you can just purge the bottle after use right? and if you know what your doing you dont need the rpm lights.
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Old 03-16-2007, 07:16 AM   #18
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also I was wondering how well the supra performs on time attack courses. I know it will be a beast on any stright away but is the turning good, and can it handle the constant high rpms. I know its a heavy car but only weighs a little more then the evos/stis that dominate time attack.
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Old 03-16-2007, 11:14 AM   #19
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Quote:
Originally Posted by WhisPer
I might run low boost on 91 so somewhere around 13-14 psi right?
Yep

Quote:
Originally Posted by WhisPer
...Well I would just buy a wet kit thats it, you dont need a purge kit you can just purge the bottle after use right? and if you know what your doing you dont need the rpm lights.
I agree you could skip the wet kit, but no, you absolutely do need electronic rpm limits on the solenoids (not lights). If you try to spray while launching, there's no way on earth you're going to be able to hit 3k rpm exactly to begin the spray, while trying to keep your Supra going straight down the track and trying to modulate wheelspin...
Quote:
Originally Posted by WhisPer
also I was wondering how well the supra performs on time attack courses. I know it will be a beast on any stright away but is the turning good, and can it handle the constant high rpms. I know its a heavy car but only weighs a little more then the evos/stis that dominate time attack.
I agree it should do great on time attack, depending on the size of your single turbo (if you do go single turbo). However, note that suspension modifications to optimize your time attack performance wouldn't be ideal for drag racing.
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.

Last edited by pwpanas; 03-16-2007 at 11:18 AM.
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Old 03-17-2007, 06:20 AM   #20
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Quote:
Originally Posted by pwpanas
Yep

I agree you could skip the wet kit, but no, you absolutely do need electronic rpm limits on the solenoids (not lights). If you try to spray while launching, there's no way on earth you're going to be able to hit 3k rpm exactly to begin the spray, while trying to keep your Supra going straight down the track and trying to modulate wheelspin...
I wouldnt spray tell 3rd I did'nt kno people spray off the line, Anyhow it doesnt matter much because if i do want to time atttack then nitrous is illegal.



Quote:
Originally Posted by pwpanas
I agree it should do great on time attack, depending on the size of your single turbo (if you do go single turbo). However, note that suspension modifications
to optimize your time attack performance wouldn't be ideal for drag racing.
Yea I was thinking of getting HkS coilovers, some sway bars and strut bars but I dont know of any good brands for supra yet I know cusco makes sways and a lot of brands make strut bars but I havent looked into it. Also What else might help suspension wise? maybe something like an Hbrace and a front splitter?
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