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Is there any mph left in my combo?

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WSLN 6

Powered by Murphy's Law
Joined
May 29, 2001
Messages
1,563
How much more can I get out of this car with the stock turbo/injectors on pump gas and alky?
I am running 790 O2's through the traps with no knock at 22psi boost.
I realize that I am almost out of injector, and will upgrade to 50's soon.
A 9/11 converter and bigger turbo is in the near future.
 
Their is one guy here running 12.26 @ 112 with race fule (no alky) on stock stuff (turbo, injectors, IC).

The key to stock set ups is timming. You need a race chip with at least 30* of timming. Keep the boost below 23 psi.

HTH


:cool:
 
Best I did on stock injectors, turbo, intercooler, downpipe, cat-back, etc. was 12.15@111.09. That was with a Reds 93 chip and a Xylene mix. It took a 1.69 launch to get there.
 
Sure there is with 28" tires. Are you locking the converter?
 
Hey WSLN 6, My combo and yours are pretty close. I just ordered my alky kit and was thinking of runnng a 100 Thrasher chip but have read where people have had trouble with the Thrasher chips and alky. Are you running the recomended 45 psi fuel pressure? Where did you start off with the turn on point and the volumn setting? Did you turn the boost up to 20 lbs or so and go from there? I'm jut trying to figure out where to start at and how to proceed from there. Any help would be appreciated. Thanks, R.B.
 
Trent, how on earth did you run that mph? Stock internals? What altitude? What fuel?
I am at 1625 feet. I have run 108mph last year with the stock IC and radials.
This year I installed the Powerstroke IC with 3" piping and ET streets.
rb68rr, Email me if you need more info on the combo.
At the moment, the pump speed is full, turn on point is about 14psi.
Fuel pressure is 38psi vac off, I am way too rich at 45psi.
 
I can't tell you anything about tuning with alky but I would think there is at least 3 or maybe 4 mph left on the table. You probably need more timing than what the Thrasher 100 has, but you may not be able to handle it with only alky. What about trying a 108 chip out with racegas of some sort?
 
I tried the Thrasher 108 I have, but there wasn't much improvement. Maybe it wasn't a fair test beacuse I was having ignition problems at the time. Might try it again just for giggles.
I always run pump gas, never the race stuff so far. I can't afford to run race gas all the time, so I thought I would try and squeeze all the safe power I could out of pump gas/alky. The time I run at the track is the time I run on the street. No disappointments.
 
Originally posted by Turbojorge
Their is one guy here running 12.26 @ 112 with race fule (no alky) on stock stuff (turbo, injectors, IC).

The key to stock set ups is timming. You need a race chip with at least 30* of timming. Keep the boost below 23 psi.

HTH


:cool:

Well, I have to heavily disagree with what Turbojorge is telling you to do here, unless you just have an uncanny desire to replace head gaskets, pistons, and the likes! I would NEVER try to run 30 degrees of timing at any level, much less with the minimal stock fueling system, and a 15 year old system at that!

In recent years the trend has leaned towards less timing, and more boost,,, but rarely a combination of both extra timing and maximum boost together (20+psi). With my stock injectors, turbo, intercooler, fuel pump, downpipe, etc, I went 12.61 @ 106 in 90 degree heat back in 1992. However, I wouldn't recommend trying it to anyone anymore! Why would you want to try and milk a little more mph out of an already overtaxed fuel system, just for the sake of saying you've run 110mph right before you blew the thing up? It just doesn't make sense these days, with the ready availability of better pumps, injectors, etc, at very inexpensive prices!

I think it is very bad advice for anyone on this board to encourage you to try and push the thing to its very edge parameter, in hopes of a small gain. It's my advice, but your motor. How you use and treat the two are entirely up to you...:confused:
 
I have a Hotwired Walbro 340 by the way.......(sig)
The injectors on the other hand, will probably be replaced by MSD 50's or something similar.
I think the 30 degree timing remark was intended for use with race gas only, so I wouldn't go that crazy.
 
The reason to run more timing is because the stock turbo was never designed to run 25psi. Others before have proven it is not practical to push the turbo that far. Rather than try to prove it to myself I listen to those who have tried it before and take their word for it. Sure he should get faster parts, we all would if it wasnt for this stuff called money and the lack thereof...:(
 
Originally posted by JToups386

I think it is very bad advice for anyone on this board to encourage you to try and push the thing to its very edge parameter, in hopes of a small gain.

Hey if you’re afraid of breaking it, then you shouldn't be racing it. Am I wrong? I agree with being safe, but lets remember one thing, Safe is Slow.

These cars run best when they are on the verge of detonation and when you’re running a stock turbo, 22psi is about all you can run efficiently. Anything beyond that is just hot air. Therefore, you need timing to make power because:

1. Like I stated earlier, 22 psi is all you can get.

2. Even if you had a turbo that can flow more air, you won't be able to flow the air threw the motor with stock heads.

3. It's hot out side (Summer) and you just can't run boost efficiently with 95*+ weather no matter what octane you use.

Like WSLN 6 said, I would never run anything less than C-16 with this much timing.

JT386, now that you've sold your car(s), It may be time for you to get another hobby instead of criticizing people who just want to lend a helping hand.
 
WSLN 6 this occured at norwalk which I would guess is about 1200 ft above sea level. I was running c16 ( even though I had run the same boost on cam2 ). I ran over 111 at least 4 times two of which were at National Trail Raceway.
the motor was bone stock untouched 143,000 miles. Reds 108 chip 24.5# of boost. the harder you push it the faster you will go. the biggest key too getting the stock turbo too go fast is leaving hard. leave with the help of the P brake at about 12-15# of boost, and watch ET drop. Like someone earlier said how hard do you want too push it :cool:
 
forgot too mention something important. weather is very important last year at this time I had trouble getting too 108. wait for the weather too get cold and then go fast. when I went 12.01@112.79 it was probably under 40deg. outside temp.
 
Must have been one of those E-brake launches ;)

Were you having any problems with the car breaking up at the top end or does she have new wires now?

Would have liked to have seen that 1.77 60ft....so much for me even coming close to catching you this year. Nice going bud!:D :D

D
 
No E-brake launches for me.....I can hold 14psi on the brake now.
I left the line with about 12psi boost, which was about 3000rpm with this converter.
The tires stuck and probably could have held more boost. New plug wires, no more popping.
That best run was with the dump closed.
 
Originally posted by Turbojorge


Hey if you’re afraid of breaking it, then you shouldn't be racing it. Am I wrong? I agree with being safe, but lets remember one thing, Safe is Slow.


Yes, You're very wrong. Remember his original question was that he wanted to run the fastest he could with "pump gas and alchy with stock turbo and injectors". Any attempt to push the timing with pump gas & alchy is asking for trouble. And, contrary to your statement above, it is everyones right to establish limits and goals for his T/R and stay within those limits. And safe is certainly not slow. You may have the time, desire and funds to repair anything that breaks as a result of pushing your combo to the hairy edge but many of us don't. To each his own. Don't mean to flame but we have very different philosophies.

That being said, I think that WSLN 6s combo is very close to the pactical limit with his combo. Maybe another pound of boost and a slight reduction of fuel pressure till the knock sensor just starts to retard timing might produce another 1-2 MPH. That should do it.
 
Originally posted by Turbojorge


Hey if you’re afraid of breaking it, then you shouldn't be racing it. Am I wrong? I agree with being safe, but lets remember one thing, Safe is Slow.

These cars run best when they are on the verge of detonation and when you’re running a stock turbo, 22psi is about all you can run efficiently. Anything beyond that is just hot air. Therefore, you need timing to make power because:
1. Like I stated earlier, 22 psi is all you can get.
2. Even if you had a turbo that can flow more air, you won't be able to flow the air threw the motor with stock heads.
3. It's hot out side (Summer) and you just can't run boost efficiently with 95*+ weather no matter what octane you use.
Like WSLN 6 said, I would never run anything less than C-16 with this much timing.

JT386, now that you've sold your car(s), It may be time for you to get another hobby instead of criticizing people who just want to lend a helping hand.

Turbojorge:
I'm sorry if you felt criticized or insulted by my posting, as that was not at all my intent. If you re-read my post, I think you'll see I was simply in disagreeance with what you advised, and gave my own opinion thereof. I was merely trying to keep WSLN6 or others from feeling they should go try to push their car to its very limits, and end up breaking it. (been there done that...) I even had a clear disclaimer at the bottom of my message.
However, now that you have decided to responsd in a far bit more critical way towards me personally, as opposed to my response which was a bit more sound advice, I will now offer my own dispute.
First off, I still have one of my Buicks, an 87 GN, to which I am rebuilding better and stronger than before. Racing is still my hobby of choice, whether it be in my 12.50 daily driver LS1 Z28, or my 11 second GN. I think my 10+ years of racing and working on my own TR's gives me a little ground to stand on when it comes to offering educated and knowledgable advice, driven by my own self learned data!
Secondly, I was not criticizing you, but rather, I was offering a second opinion to your advice,,, to which I still say was not good advice to encourage someone to attempt what you were saying. I do not know you, or your history with these cars, however, I do know 'what I know' from having been heavily involved with my own TR's, and others who have made them go much faster, and all of which agree with my advice above. Again; some people have opinions, and others have data proven advice. I fall within the latter of the two in this particular debate.
And in comment to your theory of "safe is slow", well, here is where I will openly now criticize you and say you are dead wrong! Living on the edge is fine and fast, but knowing where to draw the line is the difference between being smart and being lucky. Which one are you?
And finally; if you claim to only want to offer a "helping hand", then you would've leaned more towards a semi-conservative, (or safe) side, before you advise someone to push their car as hard as they can, because you heard it worked for some guy up in Canada or Zimbabwe or Mars, so therefore it must be okay for everyone to do it, and at no risk!
I ran SAFE with my 87 T before I sold it, to the tune of consistent 11.90's @ 112 on a stock turbo at 17-18psi and 22 degrees of timing. I think that's a decent pull, yet I never hurt it because I did not get overly greedy. And as always, this is my OPINION, which in this case can be backed with FACTS,,, for whatever that's worth. By the way, based on what I've read in your sig line and bio,,, and the fact that you were 11 years old when I started working on my first TR, it would appear you may not be the best choice to be giving advice as to how to go faster. I remember my youth too, and back then I might have chosen to push it to the max. Ohhhhh, wait a minute, I did do that,,, and had to rebuild my first TR within the first year I owned it! Lessons to be learned...??? :rolleyes:
And for the record, I think I'll stick to my racing hobby, if it's okay with you...
 
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