Dyno info about heat soak and ls2 trucks

[MyGoatBites]

This example was a new SSR truck but the same general heat soak rules apply. The difference in a couple degrees on the IAT and 20+ degree coolant temperatures made 10-15 less horsepower each pull the warmer the engine got.

Outside temperature 96 degrees
humidity 44%
pressure 30.12

First Run
190 coolant temp
IAT 114
302 hp 316 tq

2nd run same temp stats
coolant temp 210
IAT 116
289 hp 302 tq

3rd pull same temps
Coolant temp jumped to 250 on this run
IAT 121
278 hp 290 tq

[Fishhunter911]

WOW!!!! Thats a lot of power being robbed.

[VTODD]

what numbers did you put down at the dyno day event recently (the 12th)?

[MyGoatBites]

what numbers did you put down at the dyno day event recently (the 12th)?

359/372 Someday I will get on the dyno when it isn't damn near 100 degrees out.

[VTODD]

359/372 Someday I will get on the dyno when it isn't damn near 100 degrees out.

sweet numbers!

thanks!

todd

[MyGoatBites]

I can't wait to get the fans, cam, and underdrive in next week. You should give ADM a call and get that special they have going. I would be curious to see you numbers afterward.

[VTODD]

I can't wait to get the fans, cam, and underdrive in next week. You should give ADM a call and get that special they have going. I would be curious to see you numbers afterward.

oh trust me, i want those pieces BADLY, and i have communicated with andy a couple times. those would easily be my next mods. the only problem is the tune. apparently the current tune would have to be reflashed to stock and then they could put their e fan/ cai tune on it. i would then have to somehow find a dyno and a tuner local to me to re tune for the cam/headers. my tuner is 3 hours away from me, so there is the problem. i wish there was a dyno and a shop close by, but the nearest performance shop is a ford dealership that has a dyno. they only do superchips and predator tuning, and most of it is on mustangs :no:

todd

[MyGoatBites]

oh trust me, i want those pieces BADLY, and i have communicated with andy a couple times. those would easily be my next mods. the only problem is the tune. apparently the current tune would have to be reflashed to stock and then they could put their e fan/ cai tune on it. i would then have to somehow find a dyno and a tuner local to me to re tune for the cam/headers. my tuner is 3 hours away from me, so there is the problem. i wish there was a dyno and a shop close by, but the nearest performance shop is a ford dealership that has a dyno. they only do superchips and predator tuning, and most of it is on mustangs :no:

todd

Just drive on over and visit for a while. In all seriousness, I doubt you would have to tune all over again. Andy could look at your tune and just make the changes needed for the fans. Could you send him your ECM?

[VTODD]

Just drive on over and visit for a while. In all seriousness, I doubt you would have to tune all over again. Andy could look at your tune and just make the changes needed for the fans. Could you send him your ECM?

thats what i wanted to do, but he said to recalibrate for the efans, the tune i have now would have to be reflashed to stock. i cant remember why, but he had a reason for it.

todd

[02redhawk]

thats what i wanted to do, but he said to recalibrate for the efans, the tune i have now would have to be reflashed to stock. i cant remember why, but he had a reason for it.

todd


I would like to hear the reason for this... To me, it doesn't make much sense at all. :undecided But hey, that's why they are the tuners and I am not...

[ltz03]

interesting about how much power you is lost when temps go up!! When i was at the track last time I saw alot of guys putting bags of ice on their intakes to cool them off it was 89 at the hottest part of the night(cooler than the 102 the day before) boy that was one HOT week Now cooling off the intake would this really make a huge difference??? I know you want IAT's about outside temps or cooler, but as soon as you start the motor the hot as is heating it back up! I know an electric fan would push the hotter air from the radiator lower on the motor but what else can we do to lower IAT's? I have noticed a huge difference since the temps the past few night have been in the 60's and in the low 50's over the weekend.

[MyGoatBites]

All I can tell you is we sat there and watched it happen in amazment. All the other cars that were on the dyno lost a little between pulls, but the loss on this truck was obscene. Our jaws all hit the floor

[ADM PERFORMANCE]

"I would like to hear the reason for this... To me, it doesn't make much sense at all. :undecided But hey, that's why they are the tuners and I am not..."

Answer to VTODD's ECM Problem

Most aftermarket tunes rewrite the bootloader,this does not allow me into the ecm to read it...LS2 EDIT HAS A HUGE PROBLEM WITH THIS!They do it for a reason.

If the software used was HP,TUNERCAT,GM ETC ETC...WE COULD PROBABLY READ WHAT SOMEONE HAS DONE,Or if VTODD could just send me the ECM we could see if we could read it,then we can make the changes.

oR


If the guys that tuned his truck could email me his current calibration,I could possibly read it with our software,upload it to a ecm I have here,make the fan mod or what ever else....Then send that ecm to him and get his for stock,as long as it does not have a lock on it or has been tuned with LS2/LS7 EDIT.:eek:

[Blades]

So your e-fan kit is tunable/doable with hptuners software? If so, where do I sign? I do not want to send in my ECM if all I need to do is adjust a few things here and there with hptuners..

What do you tune with?

BTW: MyGoatBites - Have you seen the TBSS IAT tables? Its terrible.. To add to that the IAT sensor usually over exaggerates the temps.. Did you try a pull with hood open/hood closed? I bet that would make a difference..in a bad way.. I just assume leave the hood open as the dyno conditions are a tad worse than the street.

[MyGoatBites]

The hood was open the whole time. The SSR trucks have some fan issues. I have seen the IAT tables and I am amazed they start pulling timing at 84 degrees. THe stock tune is total BS.