Quest for 11.50

[INSIDIOUS '86]

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

[hotrod 80]

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

[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.
Posted via Mobile Device

Forgot this was with no tailgate or hood

[69GMC910]

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

[INSIDIOUS '86]

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

[djracer]

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]

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

[69GMC910]

To be clear, is your engine putting out 410hp, or is that rwhp?
Posted via Mobile Device

[Super73]

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.

[INSIDIOUS '86]

Originally Posted by 69GMC910

To be clear, is your engine putting out 410hp, or is that rwhp?
Posted via Mobile Device

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.
Posted via Mobile Device

[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.

[hotrod 80]

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.
Posted via Mobile Device

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 .

[INSIDIOUS '86]

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.
Posted via Mobile Device

[T Smith]

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

Posted via Mobile Device

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

[INSIDIOUS '86]

Oh thought I had that in the original post. Haha forgot to add that.
Posted via Mobile Device