13.3's to 11.8's to Forget it...

I'd like to hear a little bit about your 383 Belvedere during that time. pretty please !

Click to expand...

I had the 383 in it for the 05-07 seasons.

Very basic “nothing special” motor combo.
I don’t even remember when I had the machine work done on the bottom end, but it was years before I actually ran the motor.
Stock cast 400 crank(couldn’t find a steel crank....... pre-internet days).
Still externally balanced.
Stock rods with arp bolts, trw L2315’s that I put valve notches in myself.
Block decked so the Pistons stuck out .020”.
Balanced.
906’s with nice valve job(no porting), flowed low-230’s...... milled to 79cc.
Comp custom flat tappet cam(256/262-106), Isky iron rockers, rpm intake, annular 850DP Holley, 1-7/8” headers.

8” converter(5400 stall), 4.56’s, old SS springs, 29.5 x 10.5 bias slicks, flat hood, battery up front, factory 5/16” fuel line, mechanical pump, flat hood, crank driven water pump.
Looked like any other 12-13 second car under the hood.
3670lbs race weight....... 11.82 right off the trailer....... after the car had sat without a drivetrain for 6 years.
That’s using the 6 year old slicks too.

Next pass was 11.62.

Next time at the track it went 50’s....... time or two after that it went 40’s.
It went 11.40@ 3 different tracks like that.

I ended up putting cal-tracs on it with xhd springs, which went no quicker, but was much more consistent.
I also ended up putting an electric w/p drive on it to cool it off good between runs, and put some new radial slicks on it.
Went a best of 11.26 like that.

Then....... I removed the gas tank and put in a cell, added a real fuel system, took out the heater and wipers, removed the rear seat......and put on a fiberglass 6 pak hood.

I only ran it one day like that, which wasn’t a real good weather day(not as good as the day it had previously gone 11.26), and it went 11.18.
Picked up 4mph too........ the motor felt sooo much stronger in high gear with the fresh air and upgraded fuel system.
I discovered a few days later that the right front wheel cylinder was hanging up big time........ so I feel like there might have been an 11.0 in it had that issue not popped up.