[90lxracer]

I raced my car 1/8 mile yesterday and had a couple questions for the performance people.

I made 3 passes best pass netted an [email protected] race weight was 4640 That's with 3/4 tank of gas and my big a$$ in the car.

That was followed by an 8.72, than an 8.84

there was at least an hour between passes, but the car still seems to slow down. What I did notice the the shifting seemed to flare worse each pass also.
My technique was: turn off traction control, put car in competitive driving mode, but let it shift on its own. I tied bringing it just off idle, and stabbing it (first pass) 2nd pass I tried putting it "hard" up on the converter (about 2000 rpm I think) and she slowed down. 3rd was back to the just off idle thing.

The shifting seemed to get more sloppy as the day went on. The trans temps were never over 190*, and I think the hottest the oil got was 200*? but don't quote me on that one. I tried the manual shift thing and it didn't seem to want to worl very well.. Almost seemed like it "popped" out of gear on the 2-3 shift. There was a mean stumble, and I lifted. This happened multiple times. (different occasions) That's why I didn't do it at the track.

question is: Where is the coolant reservoir for the intercooler?
Is the blower that ineffiecient that it can't get back to a cool temp in an hour?
What have you guys noticed as ideal oil and trans temps to make a pass?
Would a "tune" correct the sloppyness in the shifting?

As of now the car is stone stock. I don't plan on racing it very much, but I'd like for it to work correctly when I do.

Ideas/thoughts?

Thanks

 

[Florian]

heat soak is your problem. These Vs are so inefficient, that you get 1 good pass, then youre done.


F

 

[90lxracer]

That's why I would like to know where the reservoir is. That can be iced down between passes. Hell if you wanted to get tricky you could mount a nitrous spray bar to it or something to that effect to try and keep it cool during a pass.

 

[inurok]

heat soak is your problem. These Vs are so inefficient, that you get 1 good pass, then youre done.


F

This is a shame....

 

[Redxped1]

i cracked a 12.91 out of mine last oct if i rember it was low 50's that day and the track was sticky sticky.

 

[90lxracer]

i cracked a 12.91 out of mine last oct if i rember it was low 50's that day and the track was sticky sticky.

12.91, nice work. What was your race weight? Yeah the weather was crappy, semi-hot (low80's) and crazy humid ( it was raining off and on).But the track was there for sure, I didn't turn a tire over! They were running pro-mods, so the track was top notch. I've got pics, but I don't think I can post them yet.

 

[Florian]

the resevoir sits underneath the blower so you really cant add the ice to cool it. You need a larger resevoir (D3 in 5, 4, 3, 2..................) and it needs to get some major airflow.....the STSv really isnt a good track car.


F

 

[90lxracer]

Don't laugh, I'm actually wearing the stuff for when I race my mustang. A little inside joke with the guy taking the picture! lol

 

[Redxped1]

the car was 100% stock and with less then a half tank if i rember correctly and as Florian said there is really no way i have added redline water wetter into the system. Look on d3's web sight and you will see the heat exchanger and the tank they make that there will help.

 

[CIWS]

Looks like you had fun.

 

[Dr. Design]

Sorry we are so late. Timing was a little off today. Certainly sounds like a little heat soak. These cars don't run worth a darn when they are hot and fussy. A few years ago, when we were doing some of the research on the STS-V's, we certainly noticed a measurable drop in performance when running the vehicles hot. We had a bone stock STS-V on the dyno and ran it back to back 5 times and noticed a drop of 30WHP from start to finish. We then took an STS-V stage 3 (over boosted V with blueprinted heads, intakes, headers, etc..) and added the upgraded intercooler heat exchanger & reservoir, as well as the blueprinted supercharger lid. That car only lost 4-7 WHP (cant remember the exact number, but that is the range) doing the same test on the same dyno. The heat exchangers on these cars are decent, but they are very thin and use cheap materials. The ones we use are made out of high quality aluminum and use a 1600CFM push fan to provide additional cooling.

Furthermore we also offer a intercooler fluid reservoir that mounts behind the front upper grille. This will increase the fluid capacity greatly and give you lower average temps for your intercooler fluid, thus staving off heat soak longer.

Please let us know if there are any questions.
Thank you,

Dr. Design
D3 Cadillac

the resevoir sits underneath the blower so you really cant add the ice to cool it. You need a larger resevoir (D3 in 5, 4, 3, 2..................) and it needs to get some major airflow.....the STSv really isnt a good track car.


F

 

[90lxracer]

Here's what all the gear is for...

 

[Blades]

You could turn on the intercooler pump & e-fans in between runs.. HpTuners' scanner allows this.. I just don't know if there is some sort of thermostat that would block flow and possibly hurt the pump.. I used redline water wetter in mine.. I doubt that helped all too much... I have never seen a heat exchanger with a tube and fin design.. FWIW, our heat exchangers are almost twice as tall as the Shelby and 03 cobras..

Keep in mind, you are only cooling the coolant that cools the intercoolers, which then cool the air.. Icing the top of the supercharger could help in addition to occasionally cycling the coolant. I haven't had any trouble with heat soak.. Does anyone have any numbers on the IAT versus MAT.. That should give you an idea of how efficient our system is.. My stuff is on my laptop. Its nowhere near the efficiency of my turbo car.. but still.. its not bad like 100 over ambient!

 

[PSRmark]

Here's what all the gear is for...

very nice!

here is mine...