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Executive *****istrator
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Discussion Starter #1 (Edited)
Last night I decided to run the Supra to the tracks, again very dissapointed. I ran 2 times

1st run
60ft 2.349
1/8 10.02 @ 72 :(
1/4 15.41 @ 92 :(

2nd run
60ft 2.39
1/8 10.06 @ 72 :mad:
1/4 15.46 @ 93 :mad:

Okay for those who don't remember, my first time at the track 16.0's on 2 runs. I checked MKIV and reseached and my turbos seem to be alright. How can I check for a boost leak, thats the only thing I can think of. What do you all recommend me checking. And YES it's a turbo.

I'm getting real fustrated, I was going BPU next week, but now that will have to wait. I need to figure out whats wrong with the car. Please help.....................

john
 
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are u 6spd or auto?

If 6 spd what is your launching techniuqe and if auto are u power brakeing?

The 60ft times seem to be your problem. Get your 60fr down and low ets and high traps will come.
 

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Fastdriver said:
are u 6spd or auto?

If 6 spd what is your launching techniuqe and if auto are u power brakeing?

The 60ft times seem to be your problem. Get your 60fr down and low ets and high traps will come.
Sixty foots are the LEAST of his problems. His car is no faster than a NA Supra. Look at that 93 mph trap. I have never seen a TT car that slow, and I have seen more than a few poor running examples.

There is no way that both your turbos are working. Either that or your motor has very poor ring/valve seal. Have you had it compression tested?

(Are you certain it really a turbo? Or do you live at 10000 feet above sea level? :))
 
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I've gotten below 14.00 w/ those 60 times stock before. IMO there is definatly something wrong.

You have to hook up an air compressor to your IC piping then pressurize it to around 30 psi in order to check for a boost leak. I've never done it myself, but have heard that this is the way its done.

Do you have tremendous wheelspin? How long does it take you to shift? Are you missing a hear or something?

I'd hook up a bost gauge if I were you. If you don't already have a turbo timer, you can get a Blitz one that has a boost gauge right in it.

Hope that helps.
 

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100% Stock
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Fastdriver said:
are u 6spd or auto?

If 6 spd what is your launching techniuqe and if auto are u power brakeing?

The 60ft times seem to be your problem. Get your 60fr down and low ets and high traps will come.
While those 60ft's arent good by any means, i will guerentee you that they should not yield [email protected] low 90's. With those 60ft's, a fit stock MKIV should still run a [email protected] Dropping a few 10ths will get you a slightly higher mph, though not a 10-12mph difference .
 

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Discussion Starter #6
Yes, I'm sure its a turbo and I'm at sea level, shit the beach is 45 minutes away from me. I just finished checking all the hoses, etc. Everything seems to be connected.

And my car is an auto, I rev to about 2000-2100 on my launches, then go WOT, shifting at 6200-65000 rpm's. I'm not getting alot of wheel spin. I do hear the turbos on acceleration.

On my first run, I ran on drive the whole race, and on the second I shifted manually, but I ended up with the same time. This really sux. No compression test, YET. What should they be? The car has 82K miles. Another thing, at idle my car is at 500-600rpm's, seems low????? What should it be at on idle?

Anyone near the San Antonio, Austin area that can help me, I'm willing to take the car up there to have you/them look over it. I've only had the car for several months, so I'm still in the learning phase on the Supra. PLEASE HELP!!!!!!!!!!!!!!!!!!!!

and thanks for replying brothers, keep em coming, she is really depressed (Supra) :(

john
 

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I highly recommend that you call Powerhouse Racing in Rusk,Texas. They are one of the best if not the best Supra tuners in the country. The phone number is 903-683-4320 or go to their website at www.powerhouseracing.com If they cant figure out what is wrong with your Supra nobody can. My bone stock 94 Supra ran a 13.60 at 105mph with a 2.2 60ft. Their is definitely something way off on yours. Good luck getting it fixed man.
 

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Something is defently wrong and it isn't just bad 60' times. When I was bone stock I ran a [email protected] with a 2.40 60'. I also had a boost leak I found later. You should be running at least 100 traps. Also my 1/8MPH was 80MPH bone stock.
I would get the compression checked and check all the IC hoses ot pressureize the system. Have you taked off the wheel and splash guard and checked the hoses into and out of the IC? How about the IC hose under the battery up to the TB?
 

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John,
Run a boost gauge into your car(use the instuctions
on WWW.MKIV.COM You don't have to mount the gauge,
just hook it up. It will only take 15 minutes or so. Then
you will be able to see what is happening. I would almost
bet all you have is a bad boost leak.
Wayne
 

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Executive *****istrator
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Discussion Starter #10
KJSUPRA, I was thinking about taking it up there, but its a long drive, but I'm at the point where I don't care. Will probably take it somewhere in the very near future.


Josh S said:
I would get the compression checked and check all the IC hoses ot pressureize the system. Have you taked off the wheel and splash guard and checked the hoses into and out of the IC? How about the IC hose under the battery up to the TB?
I haven't checked the IC hoses coming in/out of the IC, will do that tomorrow, before NFL of coarse. BTW, whats TB? How can I pressurize the system, what/how do I do that?

Currently, this weird noise is coming out of where the air filter is located on high revs, sounds weird, and it wasn't doing that yesterday. I'll rev it and when the rpm's go down to around 800 or so, this weird noise "farting noise" (that the best thing I could compare it to) is coming from behind the air filter. What could that be?

Thanks,
john
 

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Executive *****istrator
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Discussion Starter #11
WayneCar said:
John,
Run a boost gauge into your car(use the instuctions
on WWW.MKIV.COM You don't have to mount the gauge,
just hook it up. It will only take 15 minutes or so. Then
you will be able to see what is happening. I would almost
bet all you have is a bad boost leak.
Wayne
thanks Wayne, I'll check it out. I'm leaning towards a bad boost leak.

john
 

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WhiteVR4demon said:
KJSUPRA, I was thinking about taking it up there, but its a long drive, but I'm at the point where I don't care. Will probably take it somewhere in the very near future.




I haven't checked the IC hoses coming in/out of the IC, will do that tomorrow, before NFL of coarse. BTW, whats TB? How can I pressurize the system, what/how do I do that?

Currently, this weird noise is coming out of where the air filter is located on high revs, sounds weird, and it wasn't doing that yesterday. I'll rev it and when the rpm's go down to around 800 or so, this weird noise "farting noise" (that the best thing I could compare it to) is coming from behind the air filter. What could that be?

Thanks,
john
TB=throttle boody. What you want to check is ALL of the IC pipes, all the way from the turbo outlet to the throttle body. It's a bit hard to get to the connectors at the IC and the elbow at the drivers side, but you need to check them all carefully.
 
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re:whitevr4demon

the sound you're probably hearing is probably the infamous reed valve. If it is it's nothing and definately isn't the problem.
 

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You can't check for a boost leak w/o pressurizing the whole system, you won't find anything. Also, get an EGR blockoff plate (One Supra here had his EGR valve leak stock!).

You could also try doing TTC if the other 2 don't help. It harder to tell if the car is running on 2 turbos stock as its possible for #1 to hold .75 to redline alone.
 
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I would rev a bit higher, 4000RPM, and shift a little later while racing. I'm a terrible drag racer, but, it might do some good to practice that a bit.
 

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The most disturbing result that you've posted is actually the trap speed. It is easy to explain lousy 60 foot times but your trap speed at the end of the quarter mile is impossibly low for a TT that is running right. If I were you I would run (not walk) to a good mechanic or tuning shop and let them have a look see. I'm thinking you have a serious issue of some kind, be it an incredible boost leak, a turbo that is having issues, or perhaps incredibly low compression. Regardless of what it is, do yourself a favor and go have it checked out. Good luck.

Steve T.
 

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Discussion Starter #18
I'll probably call Chris Johnson on monday and see if i can make an appointment next weekend and have them check my car. My friend has a shop, so I'm going to have them check the compression, hoses, etc.

When is turbo # 2 supposed to kick in, rpm? Is it very obvious, noise wise, when turbo #2 kicks in. I really doubt its bad compression, but I'm not sure. I'm thinking bad boost leak or issues with the turbos.

A big thank you for all who have responded, and I will definately keep you all posted on this. If you have any more ideas, please post them.

john
 

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Did you have the trac system turned off or trac fuse pulled during your runs?
 
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