How high to rev at the strip? - 2003-04 Mach 1 Registry Owners Club

bigblockfoxbody · 10-02-2013, 06:45 PM

I have a tune in my Mach and I have noticed the rev limit was increased. I was going to leave at 7k on 2 step, but wasn't sure how high everyone had been turning their car at the drag strip. Where does power stop in a stock motor and where do things get dicey?

mach1guy20 · 10-02-2013, 10:06 PM

7k!?! If you don't have a 31 spline rearend. I wouldn't go past 3500. And if you have stickys the motor will bog at a 7k launch.

Mach828 · 10-03-2013, 12:20 AM

The motor won't bog at 7k. You want to launch closer to peak torque. If your suspension and everything is set up well, you'll cut better short times at a bit lower rpm.

Sent with a shot of DROID go fast

falcongtho3 · 10-03-2013, 06:55 AM

On a stock car a 3000-3500 launch and shift out at 6000.

Rice_slayer · 10-04-2013, 06:51 PM

Quote:

Originally Posted by falcongtho3

On a stock car a 3000-3500 launch and shift out at 6000.

Shifting at 6 on a stock car is losing on soooo much power. I went from 13.7 (shifting at 6k) to 13.2 by shifting at 6700 on my 1-2 then 6500 on the rest when I was a bolt on car. I launched at 5.5k, stock rear end didn't like that, snapped an axle and stripped the spider gears after about 40 passes. I launched at 5.5k on my built rear end all day no issues though!

falcongtho3 · 10-04-2013, 10:08 PM

Tried holding out for more revs (at the suggestion of Scott Hoag) and lost a few 10ths when I did. It was hot and humid the days I ran, so that may have had some effect.

bigblockfoxbody · 10-05-2013, 12:58 PM

Quote:

Originally Posted by Rice_slayer

Shifting at 6 on a stock car is losing on soooo much power. I went from 13.7 (shifting at 6k) to 13.2 by shifting at 6700 on my 1-2 then 6500 on the rest when I was a bolt on car. I launched at 5.5k, stock rear end didn't like that, snapped an axle and stripped the spider gears after about 40 passes. I launched at 5.5k on my built rear end all day no issues though!

I have 31 spline rear end qa1 coil covers with adjustable uppers and lowers on big and skinnies with biased plays. I shifted around 6500 to 6800 but was losing time compared to shifting at 7. I had been leaving around 4500 on radials but had to slip the clutch since 5500 and up would spin hook and get me big mph. Below would bog. I got new rubber a new two step and want to go quicker. I'm in low 8's 1/8 mile just seeing if anyone has cranked higher than 7k between shifts and if there were any benefit.

ShakeMe · 10-05-2013, 01:40 PM

As with comparing car color, you will get more than a few different answers here. Here's mine(haha), I launched at 6K and shifted at 6200 into all gears(except 5th of course). This was with 26x9 Hoosier slicks, a built rear, adjustable struts/shocks, exhaust, and driver mod which netted the 11 sec pass in my sig.

bigblockfoxbody · 10-05-2013, 03:33 PM

Quote:

Originally Posted by ShakeMe

As with comparing car color, you will get more than a few different answers here. Here's mine(haha), I launched at 6K and shifted at 6200 into all gears(except 5th of course). This was with 26x9 Hoosier slicks, a built rear, adjustable struts/shocks, exhaust, and driver mod which netted the 11 sec pass in my sig.

I like your answer the best. I have tried 6000 shift in first. You have a k member and control arms up front? What gears too?

ShakeMe · 10-05-2013, 04:08 PM

Quote:

Originally Posted by bigblockfoxbody

I like your answer the best. I have tried 6000 shift in first. You have a k member and control arms up front? What gears too?

4.30s, UPR K member/A-arms, 14" 175 lb coil over springs. Look at your dyno sheet and find peak HP then add 200 rpms and that will be (YOUR) shift point. Once you shift the next gear will pull the rpms down to around peak torque. You should feel yourself being pushed into the seat until you lift after the last cone on the track

bigblockfoxbody · 10-05-2013, 09:11 PM

Quote:

Originally Posted by ShakeMe

4.30s, UPR K member/A-arms, 14" 175 lb coil over springs. Look at your dyno sheet and find peak HP then add 200 rpms and that will be (YOUR) shift point. Once you shift the next gear will pull the rpms down to around peak torque. You should feel yourself being pushed into the seat until you lift after the last cone on the track

So you stock engine and trans?

ShakeMe · 10-05-2013, 09:52 PM

Quote:

Originally Posted by bigblockfoxbody

So you stock engine and trans?

C&L CAI
Electric water pump
Intake spacer 3/8"
SLP LTs
Catted Prochamber
SLP LM1s

That's it for HP mods. Everything else is suspension. Poly motor/trans mounts almost forgot the aluminum drive shaft and MGW shifter. I'm contemplating a ported intake and cams or some carbon fiber look good pieces.

bigblockfoxbody · 10-07-2013, 12:14 PM

Quote:

Originally Posted by ShakeMe

C&L CAI
Electric water pump
Intake spacer 3/8"
SLP LTs
Catted Prochamber
SLP LM1s

That's it for HP mods. Everything else is suspension. Poly motor/trans mounts almost forgot the aluminum drive shaft and MGW shifter. I'm contemplating a ported intake and cams or some carbon fiber look good pieces.

I would recommend milling the heads and regrinds over porting the heads. Would definitely help. I think I am going to go orange handle over the silver I have currently. Thanks, for giving me a good benchmark. Will have 1/8 times in 2 weeks. I'll post what I get.

OWmach1 · 10-09-2013, 03:03 AM

Quote:

Originally Posted by mach1guy20

7k!?!

insane right? haha

10-02-2013, 06:45 PM	#1
bigblockfoxbody Registered User Join Date: May 2011 Location: Columbus Posts: 9	How high to rev at the strip? I have a tune in my Mach and I have noticed the rev limit was increased. I was going to leave at 7k on 2 step, but wasn't sure how high everyone had been turning their car at the drag strip. Where does power stop in a stock motor and where do things get dicey?

10-02-2013, 10:06 PM	#2
mach1guy20 Registered User Join Date: Jan 2013 Location: abilene, tx Posts: 70	Re: How high to rev at the strip? 7k!?! If you don't have a 31 spline rearend. I wouldn't go past 3500. And if you have stickys the motor will bog at a 7k launch.

10-03-2013, 12:20 AM	#3
Mach828 Dark Knight Join Date: Nov 2009 Location: Albuquerque, NM Posts: 5,759	The motor won't bog at 7k. You want to launch closer to peak torque. If your suspension and everything is set up well, you'll cut better short times at a bit lower rpm. Sent with a shot of DROID go fast __________________ Vortech V2 S-trim, E85, A2A Treadstone, Comp cams, built engine, full exhaust, built rear, built 4r70, more mods. Tuned by me with SCT Advantage

10-03-2013, 06:55 AM	#4
falcongtho3 Moderating at Mach 1 Join Date: Aug 2002 Location: Baton Rouge, La. Posts: 16,280	Re: How high to rev at the strip? On a stock car a 3000-3500 launch and shift out at 6000. __________________ Krewe de la Mach Rouge #340804 13th Mach 1 built 11/07/02 Build Date 12/13/02 Delivery

10-04-2013, 10:08 PM	#6
falcongtho3 Moderating at Mach 1 Join Date: Aug 2002 Location: Baton Rouge, La. Posts: 16,280	Re: How high to rev at the strip? Tried holding out for more revs (at the suggestion of Scott Hoag) and lost a few 10ths when I did. It was hot and humid the days I ran, so that may have had some effect. __________________ Krewe de la Mach Rouge #340804 13th Mach 1 built 11/07/02 Build Date 12/13/02 Delivery

10-05-2013, 01:40 PM	#8
ShakeMe Registered User Join Date: Nov 2003 Location: TX. Posts: 2,511	Re: How high to rev at the strip? As with comparing car color, you will get more than a few different answers here. Here's mine(haha), I launched at 6K and shifted at 6200 into all gears(except 5th of course). This was with 26x9 Hoosier slicks, a built rear, adjustable struts/shocks, exhaust, and driver mod which netted the 11 sec pass in my sig. __________________ 03 Mach DSG Build Date 07/25/03 Feb 09 N2O 10.91 @ 124.21(1.55 60ft) Feb 09 NA 11.85 @ 112.87 (1.60 60ft)

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