Launch RPM question

Smitty · 01-20-2009, 08:49 AM

Ok automatic guys, on a vehicle that produces very little low end torque and makes the most power in the upper rpm range where is the ideal launch point. Should I leave low to allow the convertor to flash or high to be closer to my peak power?

Duane Eiskant II · 01-20-2009, 09:31 AM

Yo Smitty, the harder i leave with my Cleveland the faster that thing runs. The only problem is tring to keep the thing from flipping over LOL...Email me and ill tell you the leave point on my car..
Lil Duane

Dee9275@yahoo.com

Mike Pearson · 01-20-2009, 09:39 AM

Smitty

The leave rpm on my car does not really effect the ET. Launch Rpm more effects the reaction time. I will chip up to tighten up the RT and lower the leave rpm to get a slower RT. Launch RPM on my car is usually around 4000 +- with the 327. when I had the 350 in the car I left at 3200. Did you get your trans freshened up? What did they find wrong with it? Are you comming to Immokalee for the IHRA race?

Smitty · 01-20-2009, 10:22 AM

Quote:

Originally Posted by Mike Pearson

Smitty

The leave rpm on my car does not really effect the ET. Launch Rpm more effects the reaction time. I will chip up to tighten up the RT and lower the leave rpm to get a slower RT. Launch RPM on my car is usually around 4000 +- with the 327. when I had the 350 in the car I left at 3200. Did you get your trans freshened up? What did they find wrong with it? Are you comming to Immokalee for the IHRA race?

Mike,

High gear was fried in it, they couldn't explain why I was able to move with the condition of the high gear set. Waiting for the trans guy to finish it up this week.
As for Immokale, I don't think I will be able to attend that, I am probably going to stick to some of the closer SSSA races close to home (SGMP, Valdosta, Lakeland, Gainesville) if I can get some assitance I might try to one of the NHRA Div 2 races. My biggest concern now however is to get this thing dialed in, we don't have clean pass on it do to the transmission problems I didn't know I had.
Have you finished up your brake upgrade?

Smitty

Smitty · 01-20-2009, 10:34 AM

Quote:

Originally Posted by Duane Eiskant II

Yo Smitty, the harder i leave with my Cleveland the faster that thing runs. The only problem is tring to keep the thing from flipping over LOL...Email me and ill tell you the leave point on my car..
Lil Duane

Dee9275@yahoo.com

Check your email Duane.

Mike Pearson · 01-20-2009, 10:41 AM

Yes I did get the brake upgrade finished up. It worked out real nice. It took 60 lbs off the car which should get me down to the min wt. 3120. Now I wont have to worry about getting stopped at Lakeland and Orlando. I also worked on my front end. I had some horrible bump steer going on. I got that corrected. The car should handle real good now. The Immokalee race is a real fun event. Usually not a real large car count. The track is good and well run. Similar to a SSSSA race. Jay and I are going. Hopefully we will see you there.

Frank Bialas · 01-20-2009, 11:43 PM

[QUOTE=Mike Pearson; I had some horrible bump steer going on. I got that corrected. The car should handle real good now.[/QUOTE]

Mike, what kind of car were you working on with the bump-steer problem , and what changes you made to reduce/improve that condition. I run a B-body mopar and experience many idler arm failure and even major front end components

Joe DeMarzo · 01-21-2009, 07:34 AM

Frank, fix the problem and then stop doing monster wheel stands and your problems will go away. lol

Mike Pearson · 01-21-2009, 08:32 AM

Frank,

I have an early camaro SS/IA. I had a large oil pan on it that I had to lower the drag link to clear the pan. That caused the bump steer issue. Now I have an oil pan that clesrs the steering in the stock location. I re aligned the front end and checked the bump steer and it was less than 1/2 inch.

Frank Bialas · 01-21-2009, 12:30 PM

Mike thank you for your reply, looking for quick-fix

Joe thank you for your reply, you might be onto something, good luck with your new combo.

Smitty didn't mean to change your topic, but just a bit over idle or like Joe side it could do the monster mash !!!

01-20-2009, 08:49 AM	#1
Smitty Member Join Date: Jan 2003 Location: Gibsonton, FL Posts: 267 Likes: 0 Liked 1 Time in 1 Post	Launch RPM question Ok automatic guys, on a vehicle that produces very little low end torque and makes the most power in the upper rpm range where is the ideal launch point. Should I leave low to allow the convertor to flash or high to be closer to my peak power?

01-20-2009, 09:31 AM	#2
Duane Eiskant II Senior Member Join Date: Dec 2001 Location: Alexandria, Va Posts: 501 Likes: 261 Liked 57 Times in 33 Posts	Re: Launch RPM question Yo Smitty, the harder i leave with my Cleveland the faster that thing runs. The only problem is tring to keep the thing from flipping over LOL...Email me and ill tell you the leave point on my car.. Lil Duane Dee9275@yahoo.com __________________ Duane Eiskant 1354 Stock/Super Stock

01-20-2009, 09:39 AM	#3
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,434 Likes: 608 Liked 1,903 Times in 571 Posts	Re: Launch RPM question Smitty The leave rpm on my car does not really effect the ET. Launch Rpm more effects the reaction time. I will chip up to tighten up the RT and lower the leave rpm to get a slower RT. Launch RPM on my car is usually around 4000 +- with the 327. when I had the 350 in the car I left at 3200. Did you get your trans freshened up? What did they find wrong with it? Are you comming to Immokalee for the IHRA race? __________________ Mike Pearson 2485 SS

01-20-2009, 10:41 AM	#6
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,434 Likes: 608 Liked 1,903 Times in 571 Posts	Re: Launch RPM question Yes I did get the brake upgrade finished up. It worked out real nice. It took 60 lbs off the car which should get me down to the min wt. 3120. Now I wont have to worry about getting stopped at Lakeland and Orlando. I also worked on my front end. I had some horrible bump steer going on. I got that corrected. The car should handle real good now. The Immokalee race is a real fun event. Usually not a real large car count. The track is good and well run. Similar to a SSSSA race. Jay and I are going. Hopefully we will see you there. __________________ Mike Pearson 2485 SS

01-20-2009, 11:43 PM	#7
Frank Bialas Member Join Date: Sep 2007 Location: NJ Posts: 252 Likes: 6 Liked 23 Times in 13 Posts	Re: Launch RPM question [QUOTE=Mike Pearson; I had some horrible bump steer going on. I got that corrected. The car should handle real good now.[/QUOTE] Mike, what kind of car were you working on with the bump-steer problem , and what changes you made to reduce/improve that condition. I run a B-body mopar and experience many idler arm failure and even major front end components __________________ Frank Bialas 1570 STK

01-21-2009, 07:34 AM	#8
Joe DeMarzo Senior Member Join Date: Oct 2002 Location: Mahopac, NY Posts: 666 Likes: 48 Liked 113 Times in 9 Posts	Re: Launch RPM question Frank, fix the problem and then stop doing monster wheel stands and your problems will go away. lol __________________ Joe DeMarzo 1317 STK

01-21-2009, 08:32 AM	#9
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,434 Likes: 608 Liked 1,903 Times in 571 Posts	Re: Launch RPM question Frank, I have an early camaro SS/IA. I had a large oil pan on it that I had to lower the drag link to clear the pan. That caused the bump steer issue. Now I have an oil pan that clesrs the steering in the stock location. I re aligned the front end and checked the bump steer and it was less than 1/2 inch. __________________ Mike Pearson 2485 SS

01-21-2009, 12:30 PM	#10
Frank Bialas Member Join Date: Sep 2007 Location: NJ Posts: 252 Likes: 6 Liked 23 Times in 13 Posts	Re: Launch RPM question Mike thank you for your reply, looking for quick-fix Joe thank you for your reply, you might be onto something, good luck with your new combo. Smitty didn't mean to change your topic, but just a bit over idle or like Joe side it could do the monster mash !!! __________________ Frank Bialas 1570 STK