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Author Topic:   Better times at strip with same hp level? how?
streetstang67
Gearhead

Posts: 396
From: SC, USA
Registered: Nov 2002

posted 04-22-2003 02:47 PM     Click Here to See the Profile for streetstang67   Click Here to Email streetstang67     Edit/Delete Message   Reply w/Quote
I've heard some stories of fox body mustangs with 180rwhp running 13s at the strip? How? I know gears will change a lot, along with shift kit and good traction, but how can a car thats around 3000lbs run 13s with 180rwhp? Even if they dont weight that much, or if that is BS, thats about how much my car weighs and I want to know how to do it? Thanks

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capri man
Gearhead

Posts: 4320
From: doerun, ga.
Registered: Nov 2000

posted 04-22-2003 03:09 PM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
here is a pretty fair calqulator to play with.

http://users.erols.com/srweiss/calcehp.htm

------------------
mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141

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[email protected]
Gearhead

Posts: 542
From: Lakewood, CO, USA
Registered: Jun 2001

posted 04-22-2003 03:54 PM     Click Here to See the Profile for JCQuinn@work   Click Here to Email JCQuinn@work     Edit/Delete Message   Reply w/Quote
Horsepower determines the MPH at the end of the strip, the suspension determines the E.T.

Calculatore like that one are assuming you have set up your suspension for maximum traction.

If you want to go quicker, work on traction.

Now I'll bore you with an old guy story. Years ago we had an AHRA national meet in Denver and I was pitted next to Bill Jenkins. When they ran the first round of PRO Stock, Bill had one of the slower cars. I watched him cause I always enjoy watching people go through the despair of high altitude (non)performance. I expected to see him throw open the hood and start working on the engine like everyone else does when they make their first high altitude pass. Bill fooled me and did not open the hood. He just jacked up the rear end of the car and laid there thinking and adjusting. When the next round of Pro Stock qualifying ran, he had moved up considerably on the ladder. To shorten the story somewhat, he never did open the hood, he just worked on the rear end and ended up qualifying first or second.

John

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Fastymz
Moderator

Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 04-22-2003 04:26 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by [email protected]:
Horsepower determines the MPH at the end of the strip, the suspension determines the E.T.

Calculatore like that one are assuming you have set up your suspension for maximum traction.

If you want to go quicker, work on traction.


John


Good story John,and great advice.Thats right where I'm at for the last year.Traction and tuning for traction.I'll see if it paid off this summer.

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SCOOP
oddly obsessed with big scoops on little Mustangs

2.26 60'S
14.9 @ 90.86MPH

65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede.

https://mustangsandmore.com/ubb/Fastymz.html

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streetstang67
Gearhead

Posts: 396
From: SC, USA
Registered: Nov 2002

posted 04-22-2003 05:04 PM     Click Here to See the Profile for streetstang67   Click Here to Email streetstang67     Edit/Delete Message   Reply w/Quote
So your saying that if I use a trans brake and launch at 4000 rpm and my tires dont spin, I've reached as good as it will get?

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Fastymz
Moderator

Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 04-22-2003 05:10 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by streetstang67:
So your saying that if I use a trans brake and launch at 4000 rpm and my tires dont spin, I've reached as good as it will get?

Yes and No.


"As good as it will get"until you get more power,more money,more RPM's.It never ends.

------------------
SCOOP
oddly obsessed with big scoops on little Mustangs

2.26 60'S
14.9 @ 90.86MPH

65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede.

https://mustangsandmore.com/ubb/Fastymz.html

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steve'66
Gearhead

Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000

posted 04-22-2003 05:10 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
There are still some other tricks besides a trans brake and perfect traction.
Like doing it on narrow tires, lowering rolling resistance, lowering rotating mass (lighter wheels, tires, driveshafts, transmission parts, flywheel, etc).

SteveW

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[email protected]
Gearhead

Posts: 542
From: Lakewood, CO, USA
Registered: Jun 2001

posted 04-22-2003 05:32 PM     Click Here to See the Profile for JCQuinn@work   Click Here to Email JCQuinn@work     Edit/Delete Message   Reply w/Quote
Tires not spinning does not mean optimum launch. You can slightly bog the engine and not spin the tires and have a terrible 60' time. that is why 60' times are refered so often. the quicker the 60' time, the better your car is launching.

What makes you think a 4000 RPM launch is the best? Try launching at 6000 (big rush).

Then do all the things SteveW recommends, then you will see why race cars cost so much.

John

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streetstang67
Gearhead

Posts: 396
From: SC, USA
Registered: Nov 2002

posted 04-22-2003 09:10 PM     Click Here to See the Profile for streetstang67   Click Here to Email streetstang67     Edit/Delete Message   Reply w/Quote
What are some ways to get tractin without slicks? I want to be able to push this car on the street, not have to change to slicks everytime I want to push it.

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68DARKHORSE
Gearhead

Posts: 417
From: Austin, Tx
Registered: Aug 2002

posted 04-22-2003 09:43 PM     Click Here to See the Profile for 68DARKHORSE   Click Here to Email 68DARKHORSE     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by streetstang67:
What are some ways to get tractin without slicks? I want to be able to push this car on the street, not have to change to slicks everytime I want to push it.

BFG Drag Radials, under riders or Cal Tracks, Rancho adjustable shocks.

Loosen the front so it transfers the weight.
Move battery to the trunk.

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steve'66
Gearhead

Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000

posted 04-22-2003 09:46 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
The same mods for the track will help on the street. But, the street isn't prepped with VHT and isn't concrete. It isn't a safe place to "push it".

SteveW

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68DARKHORSE
Gearhead

Posts: 417
From: Austin, Tx
Registered: Aug 2002

posted 04-22-2003 09:48 PM     Click Here to See the Profile for 68DARKHORSE   Click Here to Email 68DARKHORSE     Edit/Delete Message   Reply w/Quote
clamp your rear springs.
Remove power steering and a/c.

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3F05Q
Journeyman

Posts: 64
From: Stockton, CA, US of A
Registered: Feb 2003

posted 04-22-2003 11:32 PM     Click Here to See the Profile for 3F05Q     Edit/Delete Message   Reply w/Quote
I've been considering fabricating my own traction bars. Anyone here able to provide some good geometry for such a setup, such as mounting locations, length of bars, vertical distance from axle/framerails? Thanks for any help.

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Tire squeal. It's just the tires screaming "Yay."

THE coolest muscle car site....Okay fine. Yeah it is pretty cool, but maybe not THE coolest. Umm...yeah...good Mustang Pics. Haven't figured out how to make a guestbook, or a small forum so that people can ask questions. I'm lazy like that.


http://myhome.spu.edu/dowdea

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steve'66
Gearhead

Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000

posted 04-23-2003 12:25 AM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Traction bars aren't worth your time or materials to build yourself. In my opinion anyway. You can buy used ones for $50 all day long. $100 plus for new ones.

SteveW

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Ryan Wilke
Gearhead

Posts: 1700
From: Stanton, Michigan 49707
Registered: Oct 2000

posted 04-23-2003 08:36 AM     Click Here to See the Profile for Ryan Wilke   Click Here to Email Ryan Wilke     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by steve'66:
Traction bars aren't worth your time or materials to build yourself. In my opinion anyway. You can buy used ones for $50 all day long. $100 plus for new ones.

I haveta agree. When I priced decent heim joints, they would of cost me more than the cost of a set of used-but-good Cal-Tracs....

Ryan

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bluestreek
Gearhead

Posts: 1460
From: Athens,GA
Registered: Jul 2001

posted 04-23-2003 09:30 AM     Click Here to See the Profile for bluestreek   Click Here to Email bluestreek     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Ryan Wilke:
used-but-good Cal-Tracs....

Ryan


not very easy to find good used Cal-tracs! but a 150 lbs of xtra weight in the trunk, drag radials, and any kind of full length traction bar, does wonders for rear tire grip.

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1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, TFS alum. heads, ported Stealth 8020 intake, Xtreme 274 Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi.
2nd pass: 12.11 @ 114 mph (7.80 @ 92 mph)
DanH

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streetstang67
Gearhead

Posts: 396
From: SC, USA
Registered: Nov 2002

posted 04-23-2003 02:29 PM     Click Here to See the Profile for streetstang67   Click Here to Email streetstang67     Edit/Delete Message   Reply w/Quote
Are the shelby underide bars any good? After its all said and done, say I had perfect traction...How much faster do you think the E.T.s would be vs. a stock suspension (what I have now)?

------------------
'67 coupe: 289 bored .030 over, c-4 tranny
Holley 600 carb, edelbrock performer intake, hooker comp headers, dual flowmaster exhuast

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bluestreek
Gearhead

Posts: 1460
From: Athens,GA
Registered: Jul 2001

posted 04-23-2003 07:55 PM     Click Here to See the Profile for bluestreek   Click Here to Email bluestreek     Edit/Delete Message   Reply w/Quote
I don't know about your combination , but I can knock a full second or more off my e.t. just being able to leave the hole without spinning.

------------------
1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, TFS alum. heads, ported Stealth 8020 intake, Xtreme 274 Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi.
2nd pass: 12.11 @ 114 mph (7.80 @ 92 mph)
DanH

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steve'66
Gearhead

Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000

posted 04-23-2003 08:39 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by streetstang67:
Are the shelby underide bars any good?

NO,

They are ok for road racing but not for the drag strip. I have a pair collecting dust if you want to try 'em. Only thing is the brackets are still welded to our '66.

SteveW

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Warhorse
Journeyman

Posts: 49
From: Greenwood,SC
Registered: Dec 2002

posted 04-24-2003 09:44 PM     Click Here to See the Profile for Warhorse   Click Here to Email Warhorse     Edit/Delete Message   Reply w/Quote
My friend has a 91 coupe that made 195 rwhp on the dyno. He has run a best of 9.06 @ 78 in the 1/8. He also ran a 14.40 @ 94 in the 1/4.

------------------
65 mustang
drag car, 302, Elderbrok torker intake, Holley 650 double pumper, Comp cams .592 lift, 289 heads w/ 351 valves, longtube headers, narrowed 9 in. rearend w/ 5.86 gear, 31 spline axles, c-4 w/ Hurst shifter, ladder bar suspension, 31x13x15 slicks, 6 point cage

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