Improved a little, new time 12.47

[TexasT]

That thing must be hooking really well. Not much mph for a 12.29

What kind of 60ft n 330 are you laying down?

Rich

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[OhioC5]

On this run off the transbrake 6psi and not shifting out of 2nd until almost 6k

60' 1.777
330 5.017
7.8 1/8
86.52 1/8 mph
10.2 1000'
12.29 1/4
109.07 mph

 

[TexasT]

Is it shifting into overdrive? 1/8 looks good but it isn't gaining as much as it needs to in the second half. You might be able to launch with a big more boost too. Get that 60 into the low 1.6s.
That's a lot of rpm before the shift into second. Do you feel it run out of steam before it shifts?

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[OhioC5]

No it doesn't shift into OD. Oh yea, it ran out of steam from 2nd to 3rd but the shifter cable broke and I had to think fast and turn the steering column. Guess I didn't think fast enough though. This had potential to be a really nice run until the mishap.

 

[OhioC5]

These came today.

 

[TexasT]

Nice!

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[OhioC5]

What do you think about a Mickey Thompson part number mtt3755R on the rear 8" rim

 

[TexasT]

That's a pretty big tire and might fit better on a 10 inch wheel though I'm sure others run em on an 8 inch.
They say they are bias ply . Not sure how much street driving you plan to do. A drag radial might be a better choice, but that is your call.
It will definitely fill the wheel well. You might have to roll the lip to prevent rubbing and I would think they might rub the frame when cornering if run at low pressures.
I've not run anything bigger than a m/t 28x9 slick and that is just at the track. I do run a 255/60-15 on the street and have run a 265/50-15 on a stock 15x7 on the rear. I do run a 215/75-15 on the front. Tall for max roll out.

Rich

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[20psiofevil]

That is a good tire. I run a275 40 17 nto5r, it is also a damn good street tire and hooks great with bagged rears. You think you need that much tire? 275 50 would be my choice.

 

[OhioC5]

I want it to be 28" tall, the fronts I ordered are 27".

 

[OhioC5]

Right now I have a 255-60-15 Mickey Thompson on the back and it works pretty well I guess.

My cable didn't break it just fell off of the shifter. When I put it in park sometimes I have to turn the column to get the key out. I put a washer on the little stud the cable hooks to and ran a piece of wire through the hole so the cable wont fall off again. It seems to work great, it really tightened up the shifter. Now when I put it in park the key comes right out.

 

[OhioC5]

Next time I'm going to let this thing shift into OD and see what happens.

 

[Bescurred]

Next time I'm going to let this thing shift into OD and see what happens.

Leave it in D

 

[OhioC5]

I have to look at my log and see what RPM's I'm going through the lights at before I decide on a 28" tire.

 

[turb0buick57]

If your goal is 11s.. 255 60 15 mickeys are 27in and will get you there. They should get you 1.5-1.6x sixty foots with more practice/playing with air pressure.

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[OhioC5]

That's what's on the car now.

 

[turb0buick57]

Yep. So hopefully that saves you $400-500 by not replacing tires. Keep working at it you'll get 11s.

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[OhioC5]

Oh yea, I was thinking the same thing. I don't think it spun the tires when I left at like 6psi and 1.77 60'. I tried leaving at 10ish pounds and just lit them up. Going to try dropping the pressure to 20lbs and leaving a little harder. I know I'm going to lean on it till something breaks...

 

[forcefed3.8's]

Drop the pressure to 16 to 18. Do you have an air bag? I have had 60's in the high 1.4's to low 1.5's with all stock suspension, air bag, and 255's and 275/60's in low 11 to high 10 sec cars. At that boost you should be running mid 11's@114. Where is your AFR and timing?

 

[forcefed3.8's]

And forget the transbrake, foot brake it. With a stock suspension, the transbrake makes the radials bounce and unload.