Quest for 11.50 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

INSIDIOUS '86 · 04-10-2012, 07:19 PM

Want to get my 86 shortie to 11.5 in the 1/4 I'm Planning on an overdrive 200r4 and some 373 gears with a locker and a 3000 stall converter with lockup and m&h race master 275 16s drag radials. My engine is putting out about 410 hp right now. I have a 5-7 drop on suspension and a race weight fiberglass cowl hood on the way.

What do you guys think it will take to pull up to 11.5?
Haven't got any timed runs yet till the new trans is back in
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hotrod 80 · 04-10-2012, 09:49 PM

What does it run now ? Post the last time slip for us .

INSIDIOUS '86 · 04-11-2012, 01:00 AM

Runs 13.65 with 295/50/16 bf Goodrich and a 308 open diff with th350 no stall just a shift kit. And had a 3-4 drop.
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Forgot this was with no tailgate or hood

hotrod 80 · 04-11-2012, 05:59 PM

Quote:

Originally Posted by INSIDIOUS '86

Runs 13.65 with 295/50/16 bf Goodrich and a 308 open diff with th350 no stall just a shift kit. And had a 3-4 drop.
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Forgot this was with no tailgate or hood

A gear and posi is where i would start along with a set of tires . As stated above try shifting it sooner . If you feel it pull again when you shifted you shifted to late .

69GMC910 · 04-11-2012, 01:07 AM

I would guess that your modifications will put you in the 12.8 range.

INSIDIOUS '86 · 04-11-2012, 03:33 AM

So adding gears stall and less weight Get me halfway so then I guess more hp is in order? If I add about 90hp to my setup and lose wight with aluminum components( heads water pump and mini starter) how much closer would you say?
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djracer · 04-11-2012, 07:00 AM

I'd say add Cal Trac Bars and 100 to 150 shot of nitrous. I would run Hoosier or Mickey Thompson Drag radials.

Good Luck!

Super73 · 04-11-2012, 11:53 AM

At 3,525lbs (me in the truck) and 449rwhp (unlocked converter 410rwhp) I went 11.45 with the following drivetrain. 4L80E, 4,500rpm converter, 4.56 gear, 315/60/15 mt et drag radial. It probably would have went a little faster with a 26" or 28" tall tire as I was geared more for the bottle.
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69GMC910 · 04-11-2012, 12:06 PM

To be clear, is your engine putting out 410hp, or is that rwhp?
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INSIDIOUS '86 · 04-11-2012, 01:44 PM

Quote:

Originally Posted by 69GMC910

To be clear, is your engine putting out 410hp, or is that rwhp?
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My engine is 410 hp to the flywheel.
And yes the 2004r is a lockup trans too. Same as the 700r4 just without the silly first gear ratio.

I will absolutely not run my engine on a bottle.
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Super73 · 04-11-2012, 12:25 PM

On a chassis dyno with the converter locked it made 449rwhp. With the converter unlocked it made 410rwhp. I am not sure if a 200r4 has a locking converter. That is why I posted both numbers so it could be compared apples to apples.

T Smith · 04-11-2012, 03:06 PM

If the engine in your sig is the engine you're running, you can gain quite a bit by ditching that Thumper camshaft, and you dang sure ain't making no power at 8 grand with that setup, you're lucky it's still in one piece.

INSIDIOUS '86 · 04-12-2012, 01:01 AM

Quote:

Originally Posted by T Smith

If the engine in your sig is the engine you're running, you can gain quite a bit by ditching that Thumper camshaft, and you dang sure ain't making no power at 8 grand with that setup, you're lucky it's still in one piece.

Like I said I'm going with heavy breathing heads and a solid cam. This thumper does do rather good for the street though and is decent on power

As for the 8k rpm. I built the valve train to take the abuse. An was very meticulous about my rotating assembly. Needless to say the cam doesn't support past 5800 rpm an I have a 6100rpm rev limit.
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T Smith · 04-12-2012, 07:35 AM

Quote:

Originally Posted by INSIDIOUS '86

Like I said I'm going with heavy breathing heads and a solid cam. This thumper does do rather good for the street though and is decent on power

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I don't see where you said that, just the mention of aluminum heads for the weight loss.

INSIDIOUS '86 · 04-12-2012, 11:14 AM

Oh thought I had that in the original post. Haha forgot to add that.
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04-10-2012, 07:19 PM	#1
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Quest for 11.50 Want to get my 86 shortie to 11.5 in the 1/4 I'm Planning on an overdrive 200r4 and some 373 gears with a locker and a 3000 stall converter with lockup and m&h race master 275 16s drag radials. My engine is putting out about 410 hp right now. I have a 5-7 drop on suspension and a race weight fiberglass cowl hood on the way. What do you guys think it will take to pull up to 11.5? Haven't got any timed runs yet till the new trans is back in Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

04-10-2012, 09:49 PM	#2
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: Quest for 11.50 What does it run now ? Post the last time slip for us . __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583

04-11-2012, 01:00 AM	#3
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Quest for 11.50 Runs 13.65 with 295/50/16 bf Goodrich and a 308 open diff with th350 no stall just a shift kit. And had a 3-4 drop. Posted via Mobile Device Forgot this was with no tailgate or hood __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

04-11-2012, 01:07 AM	#5
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: Quest for 11.50 I would guess that your modifications will put you in the 12.8 range. __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

04-11-2012, 03:33 AM	#6
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Quest for 11.50 So adding gears stall and less weight Get me halfway so then I guess more hp is in order? If I add about 90hp to my setup and lose wight with aluminum components( heads water pump and mini starter) how much closer would you say? Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

04-11-2012, 07:00 AM	#7
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,891	Re: Quest for 11.50 I'd say add Cal Trac Bars and 100 to 150 shot of nitrous. I would run Hoosier or Mickey Thompson Drag radials. Good Luck! __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

04-11-2012, 11:53 AM	#8
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: Quest for 11.50 At 3,525lbs (me in the truck) and 449rwhp (unlocked converter 410rwhp) I went 11.45 with the following drivetrain. 4L80E, 4,500rpm converter, 4.56 gear, 315/60/15 mt et drag radial. It probably would have went a little faster with a 26" or 28" tall tire as I was geared more for the bottle. Posted via Mobile Device __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

04-11-2012, 12:06 PM	#9
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: Quest for 11.50 To be clear, is your engine putting out 410hp, or is that rwhp? Posted via Mobile Device __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

04-11-2012, 12:25 PM	#11
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: Quest for 11.50 On a chassis dyno with the converter locked it made 449rwhp. With the converter unlocked it made 410rwhp. I am not sure if a 200r4 has a locking converter. That is why I posted both numbers so it could be compared apples to apples. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

04-11-2012, 03:06 PM	#12
T Smith Registered User Join Date: Jan 2011 Location: Vicksburg, Mississippi Posts: 567	Re: Quest for 11.50 If the engine in your sig is the engine you're running, you can gain quite a bit by ditching that Thumper camshaft, and you dang sure ain't making no power at 8 grand with that setup, you're lucky it's still in one piece.

04-12-2012, 11:14 AM	#15
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Quest for 11.50 Oh thought I had that in the original post. Haha forgot to add that. Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511



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