CCD Results!

[ZSHO]

What RPM were you launching at? Tire pressures? etc...

I was trying to launch @ 2220 but the brakes are on the do list! Tires set @ 27f- 29r IIRC! I never ran them prior and should of played with the tire psi! Thanks. Z

 

[802SHO]

What RPM were you launching at? Tire pressures? etc...

I was trying to launch @ 2220  but the brakes are on the do list! Tires set @ 27f- 29r IIRC! I never ran them prior,but could of done things different! Yes! Z

Interesting you mentioned "trying to" launch at 2200 as I have the same issue with my brakes not holding too well at times.  New Brakes on the to do list here as well. 

 

[StealBlueSHO]

Z, BamSHO recommended dropping the launch RPM down to 1800 last time he looked at my slips... I did and dropped my sixty foot to a 1.80...

I also aired down to 20psi up front.

Might help!


Sent from my iPhone using Tapatalk

 

[SHOdded]

Didnt you have the tpms or advancetrac lighting up your dash?  20 psi is getting down low lol.  Maybe need to run softer sidewall rubber.  Partly why the DWS seemed to have a slight advantage over the Michelin Pilot Sport at the track.  Autocross would be different.

 

[StealBlueSHO]

Didnt you have the tpms or advancetrac lighting up your dash?  20 psi is getting down low lol.  Maybe need to run softer sidewall rubber.  Partly why the DWS seemed to have a slight advantage over the Michelin Pilot Sport at the track.  Autocross would be different.

No advancetrac light, TPMs did light up after the car sat and tires cooled down.

P-Zero’s are not the best...  but I even aired down that far on my 2010 with BFgoodrich comp sport 2’s (not the all seasons)

After going to lots of tracks at different times of year, there is no set combo... even at the same track on the same night the track may operate differently as the night get colder, track prep gets worn down and re-applied, etc..

If you are staged and they reapply the vHT right before you get to go... then hell yea crank the rpms up and let her loose lol...


Sent from my iPhone using Tapatalk

 

[SHOdded]

Good insight :thumb:

 

[sm105k]

What RPM were you launching at? Tire pressures? etc...

I was trying to launch @ 2220 but the brakes are on the do list! Tires set @ 27f- 29r IIRC! I never ran them prior and should of played with the tire psi! Thanks. Z

I ran 12.56 @ 108.98 with a 1.77 sixty foot. I did have some boost issues. Mine has gone at fast as 112 in the quarter in way hotter weather and 3300 DA.  Even though I ran a PB ET and 60 foot, the "big end" on that run felt way off.  A boost reference line (in the attachments) had come off before I went to the track and I missed it. Brad saw it in the logs after I went to the track.  So with the boost leak, overboosting, and the throttle closing (limiting boost) I had issues.

It is funny you bring this up about launching.  While going to the track I was having severe pushing issues around 2000 rpm with the stock PP brakes. I could not get the car to hold while leaving in boost at the track. The car would 60 foot high 1.80's with 30 psi all around tire pressure.  On the street, I can get the car to leave at 2400-2500 rpm at 3 to 4 psi.  I actually got try to leave at 2700 rpm and 6 psi, but as soon as I let off the brake the car fell on right on its face (probably a safety thing).


I changed my pads and rotors (Powerstop slotted, vented, and drilled, ceramic pads, and brake fluid flush) and went back to the track.  On the 1.77 sixty foot, tires were set at 30 psi all around, I left at 2200 rpm and 1 psi of boost.  I can probably get her to hold at 2500 rpm and hopefully leave around 3 to 4 psi but I didnt wait because I was racing a GTO. I think with a low 1.70 sixty and 112 mph tap speed I see a 12.3x in the future tune only. Throw an intercooler and DP's I see a shot at 11's full weight.

 

[ajpturbo]

There is a brake pedal override that if you hold the brake torque too long it will stop the party...remember the run away toyotas? People were too dumb to turn the key off so the mfg’s places additional electronic protocols in the tunes

 

[sm105k]

There is a brake pedal override that if you hold the brake torque too long it will stop the party...remember the run away toyotas? People were too dumb to turn the key off so the mfg’s places additional electronic protocols in the tunes

I knew it was something like that Brad. I just couldn't articulate it.

 

[ZSHO]

I found Brake Torque (Boosting) it limited to 3 seconds which is roughly the same time from the Staging light to the Go-Green IIRC!  Z

 

[shoNoff]

I can tell you I’ve made roughly 100 passes on my sho this year. The more I ran the car the more I learned it really liked lower rpm launches. I found the sweet spot for me to be around 1800-1900rpm. Any higher I wheel hop and transmission shudder my way to the 60 foot clock. Or it just falls flat on its face.

 

[ZSHO]

Z, BamSHO recommended dropping the launch RPM down to 1800 last time he looked at my slips... I did and dropped my sixty foot to a 1.80...

I also aired down to 20psi up front.

Might help!


Sent from my iPhone using Tapatalk

Thats sure getting down and dirty @ 20 psi!    I know Brian(Bamsho) likes to keep them on the low side as well! This was my first outing with the fairly new Dunlops extreme sports summer tires which stick like glue! Thanks for the input. Z

 

[Jordan]

Just gotta find the right traction RPM to launch at. Really depends on what kind of prep you got going for ya. One strip I was launching at 2200 next I was launching at 2000, both with similar times produced, but fairly different 60 foots. I think it's more heavily tire dependent! Also how much timing you have on launches.

 

[StealBlueSHO]

Just gotta find the right traction RPM to launch at. Really depends on what kind of prep you got going for ya. One strip I was launching at 2200 next I was launching at 2000, both with similar times produced, but fairly different 60 foots. I think it's more heavily tire dependent! Also how much timing you have on launches.

These small turbos spool up so fast it’s more about the boost ramp.... Brad brings the boost hard and fast on the low end. I couldn’t just drop the hammer with his tune.. I had to ease into it.


Sent from my iPhone using Tapatalk

 

[802SHO]

Just gotta find the right traction RPM to launch at. Really depends on what kind of prep you got going for ya. One strip I was launching at 2200 next I was launching at 2000, both with similar times produced, but fairly different 60 foots. I think it's more heavily tire dependent! Also how much timing you have on launches.

These small turbos spool up so fast it’s more about the boost ramp.... Brad brings the boost hard and fast on the low end. I couldn’t just drop the hammer with his tune.. I had to ease into it.

Ive tried it both ways and the majority of the time is 1800 or so.  Overall my 60fts have been a little slow I think.  Average is probably a 1.83.  My best runs I'm usually about 1.80 and some change.  Ive had 3 1.7 60fts.  Best at a 1.74.  Then I said screw it with the 1800 launch and went for 2000-2200 but having brake issues holding it.  Car edges up sometimes and throws me off.  So I dont have enough experience I feel to be convinced one way or the other or maybe even the same exact routine yields different results all the time depending on track prep, temp, DA and tire pressure.  Its almost like we have to try all our tricks every single trip to the track bc each one can be effective when the last time it wasn't. 

Lol!  Anyway I want to elminate the tire traction issue off the list with some dedicated DR's.  Can save 3 pounds or more each tire also which = faster also

 

[ZSHO]

I might have one more shot @ the Track very soon as long as mother nature complies! Fingers crossed! Thanks for all the replies.  Z

 

[802SHO]

Based on the weather I might have one more shot @ the Track very soon as long as mother nature complies! Fingers crossed!  Z

Hell yeah Man I hope that works out for you!

 

[shoNoff]

I might have one more shot @ the Track very soon as long as mother nature complies! Fingers crossed! Thanks for all the replies.  Z

Let’em have it buddy hopefully all works out for you.


802Sho I think a lot of our 60 foot time problems were the fact that it was 35 out the last night we ran. My old 32x16slicks would of had trouble hooking up

 

[802SHO]

I might have one more shot @ the Track very soon as long as mother nature complies! Fingers crossed! Thanks for all the replies.  Z

Let’em have it buddy hopefully all works out for you.


802Sho I think a lot of our 60 foot time problems were the fact that it was 35 out the last night we ran. My old 32x16slicks would of had trouble hooking up

I trust your experience in the matter and that was the worst day for traction by far....in my beginner experience

 

[ZSHO]

It looks like the track season is over based on today's weather but knowing it has the potential to break the 11's barrier is good enough even with a Trap speed of almost 116 mph!!!

I must admit it was Fun and a True pleasure to have friends and enthusiasts like Manu (SHOdded) by your side to say the least....

BTW Hats off to the crew over @ LMS & See ya in 2019!  :thankyou:  Z