New Features: Ford Mustang Knowledge Base - check it out & suggest new topics here.
Ford Mustang Forums - Ford Mustang Classifieds - MustangForums.com Photo Galleries - MustangForums.com Chat Room - Create an Account - Mustang News

Go Back   MustangForums.com > Ford Mustang Tech > Saleen, Roush and Boss Mustangs

Reply
 
Thread Tools Search this Thread
Old 04-23-2007, 11:53 PM   #1
sowaxeman
Moderator
My Garage
 
sowaxeman's Avatar
 
Join Date: Mar 2005
Vehicle: 82 GT / 85 GT 'vert / 05 S-281
Location: Indianapolis, IN
Posts: 4,061
Default What RPM's For Launching - UPDATED w/RESULTS

I'm going to a club hosted drag day (racing, not dressing [8D]) this weekend and I am planning on running the car twice. Once against a 2007 base Steeda with 350 crank hp, and once against my buddies 2000 Vette with about 345 crank hp. My car has estimated 360ish so they should be all driver.

What is a good rpm to launch at - I don't want to lose because I'm stuck at the line spinning [sm=gears.gif] At such rpm level, is it a pretty quick pop of the clutch or do I still need to feather it a tad?
__________________
Jason Smith
Saleen Club Of America - Central Region Director
http://www.saleenclubofamerica.com/Central

1982 GT : 1985 GT 'Vert : 2005 S-281 #92

*Due to Notification issues, I may not receive PM's in a timely fashion. Please send me an email if you wish to contact me directly.
sowaxeman is offline   Reply With Quote
Sponsored Links
This ad is not displayed to registered members.
Register your free account today and become a member on Mustang Forums!
Old 04-24-2007, 12:26 AM   #2
mills281e
4th Gear Member
My Garage
 
Join Date: Aug 2006
Vehicle: 2002 Saleen S281 Extreme
Location: GA
Posts: 1,563
Default RE: What RPM's For Launching

Quote:
I'm going to a club hosted drag day (racing, not dressing [8D])
That's funny stuff! I had visions of Dustin Hoffman from the movie Tootsie launching a Mustang against Stormin Norman back in the day [sm=icon_rock.gif].

Launch RPM.....go conservative.....3000 or so (get a good idea where and how much your motor falls off during your test launches). As you suspect, you'll lose that racewith atire smoking start. Even if you get just an average start....you have catch up HP. So throw the 20 lb Trilene fishing line out and real them in.....

Clutchis feel.....higher RPM launchesget you closer and closer to "dump the clutch and let her rip territory".....but traction is a must. Street radials = somewhere between feather and dump. A few test launches are definitely in you future.

Hopefully, Polkster and others with a ton of recent tracktime will share their secrets.
__________________
2002 Saleen S281 Extreme #46
Chicane Intercooler & pulley; SCT Chip & Tune; 3.73's; 90mm SCT MAF; 70mm ACCUFAB TB; KB Boost-A-Pump; Spec Stage 3 clutch, High-flow cats; built & tuned by Modular Powerhouse
1997 SVT Cobra #5726 (SOLD)

mills281e is offline   Reply With Quote
Old 04-24-2007, 12:36 AM   #3
06SaLeEn
I ♥ Acer
My Garage
 
Join Date: Feb 2007
Location:
Posts: 1,136
Default RE: What RPM's For Launching

The Steeda 2007 baseline from what I understand it to be is 335 crank hp with a Drag pack they claim to be "the fastest production mustang". They call it the Q335 and Steeda claims it goes 12.7 at 108 mph, they also have a Q400 12.2 at 113 mph and a Q525 at 118 mph. Of course I am sure the 1/4 mile times are a little bloated, I am almost 100% sure they dont make anything lower than the Q335 (there base car) With that said, being that you have 3.55 on your 2005 for gears and those 20 inch rims(boy there heavy)[:@], you may have a tougher time than you think with the steeda assuming its the Q335. With all that said who knows good luck and lets us know what happens. Numbers mean very little when your that close, its all about the driver. when I was N/A on street tires, 2500-3000rpms worked for me. As for the 2000 vette it runs I think low 13's so it should be a drivers race.......Good luck let us know what happens..
06SaLeEn is offline   Reply With Quote
Old 04-24-2007, 12:50 AM   #4
sowaxeman
Moderator
My Garage
 
sowaxeman's Avatar
 
Join Date: Mar 2005
Vehicle: 82 GT / 85 GT 'vert / 05 S-281
Location: Indianapolis, IN
Posts: 4,061
Default RE: What RPM's For Launching

Yeah - I'm am certain both will be drivers races, I just want to make sure I am the better driver [8D]
__________________
Jason Smith
Saleen Club Of America - Central Region Director
http://www.saleenclubofamerica.com/Central

1982 GT : 1985 GT 'Vert : 2005 S-281 #92

*Due to Notification issues, I may not receive PM's in a timely fashion. Please send me an email if you wish to contact me directly.
sowaxeman is offline   Reply With Quote
Old 04-24-2007, 03:15 AM   #5
PolkThug
4th Gear Member
My Garage
 
Join Date: May 2005
Location:
Posts: 1,961
Default RE: What RPM's For Launching

Don't forget to let out tire pressure on the rear tires!! (Amateur mistake)
Conversely, air up the fronts.

Do your first launch at 2800, then adjust from there.
__________________
<img>http://i27.photobucket.com/albums/c192/PolkThug/sigxx.jpg</img>
PolkThug is online now   Reply With Quote
Old 04-24-2007, 03:22 AM   #6
saleen281eguy
2nd Gear Member
My Garage
 
Join Date: Apr 2007
Location: Michigan
Posts: 163
Send a message via AIM to saleen281eguy
Default RE: What RPM's For Launching

Quote:
ORIGINAL: sowaxeman

I'm going to a club hosted drag day (racing, not dressing [8D]) this weekend and I am planning on running the car twice. Once against a 2007 base Steeda with 350 crank hp, and once against my buddies 2000 Vette with about 345 crank hp. My car has estimated 360ish so they should be all driver.

What is a good rpm to launch at - I don't want to lose because I'm stuck at the line spinning [sm=gears.gif] At such rpm level, is it a pretty quick pop of the clutch or do I still need to feather it a tad?
i havn't tracked or even launched my 06 yet, but from knowledge of my 01 with similar power... i had the 4:10 gears and i heated my tires up (better traction without waterbox) then gave it just a little bit of gas holding it at about 1200 rpm (tuned a little higher than stock idle @ 900 rpm) and dumped the clutch there. It was just enough to where i wouldnt spin off the line, but then again that was with a street tire, and i was getting 2.68 60 ft's.

if you run aradial .... launch it at 5500 [sm=icon_rofl.gif]

oh and yess..... drop your tire pressure down to at least 18 lbs. I think i ran my street tires at 9 lbs cause im crazy like that haha.
__________________
Adam

2006 Saleen Extreme #132
- 456 RWHP (stock)
- Scenic Roof
- 1 of 4 with roof/color combo

2001 Saleen S281 #318 (sold)
- Many MANY mods
saleen281eguy is offline   Reply With Quote
Old 04-24-2007, 10:47 AM   #7
06SaLeEn
I ♥ Acer
My Garage
 
Join Date: Feb 2007
Location:
Posts: 1,136
Default RE: What RPM's For Launching

Yeah if your on street tires stay out of the waterbox.
06SaLeEn is offline   Reply With Quote
Old 04-24-2007, 04:03 PM   #8
saleen281eguy
2nd Gear Member
My Garage
 
Join Date: Apr 2007
Location: Michigan
Posts: 163
Send a message via AIM to saleen281eguy
Default RE: What RPM's For Launching

the waterbox gave me worse 60 ft. times
__________________
Adam

2006 Saleen Extreme #132
- 456 RWHP (stock)
- Scenic Roof
- 1 of 4 with roof/color combo

2001 Saleen S281 #318 (sold)
- Many MANY mods
saleen281eguy is offline   Reply With Quote
Old 04-24-2007, 04:21 PM   #9
06SaLeEn
I ♥ Acer
My Garage
 
Join Date: Feb 2007
Location:
Posts: 1,136
Default RE: What RPM's For Launching

there is not point if your on street tire's to go into the box, nor is there much of a point of doing a big burnout when on street tires......
06SaLeEn is offline   Reply With Quote
Old 04-24-2007, 04:28 PM   #10
jcw
1st Gear Member
My Garage
 
Join Date: Apr 2007
Location:
Posts: 95
Default RE: What RPM's For Launching

with my car i came out of the hole best at around 2600 to 2700 rpm, but mines superchargered rear gears will help 4.1s are great for the track, but if you do alot of long distance driving maybe a set of 3.90s would work theres just on enough of a change between the stock 3.55 gears and a set of 3.73s to justify the expense of havin it done
jcw is offline   Reply With Quote



Reply



Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off
Forum Jump

Advertising

Featured Sponsors









New Sponsors
All times are GMT -5. The time now is 09:33 PM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.2.0

MustangForums.com and InternetBrands, Inc. are not affiliated with the Ford Motor Company