an example of corey hendersons excellent work

[jonszr1]

got a chance to take my blk car to the strip. car has coreys ported inj housings and plenum and tune .car also has jeal headers, custom dr gas 21/2 in exhaust with x pipe and 410 gears.too bad my buddy didnt get the last run 11.89@120.66 ANY DOUBTERS JUST ASK HIM . GO TO U TUBE zr1 sec. brad taylors zr1 @ at famoso 9-5-08. sure was fun answering all the ?s from those wondering what an lt-5 was . i gotta do this more often

 

[90 Corvette ZR-1]

next time i'm in san antonio i'm stopping at coreys

 

[jonszr1]

you will be very glad you did ,a very honest fairly priced guy .heck i drove 1500 miles one way to have him work on my car. as you can see from the results i am very glad i did

 

[HammerZR1]

I ran a 12.53 @ 113 in Boise. Track elevation is 2700 Ft, corrected on that run I would venture to say was probably 4,000 Ft or better. That was with a slipping clutch (slightly).

Mods were - Open Air Cleaner Lid w/ K&N - Haibeck Chip - Watson Headers - Flowmaster Cat-Back Exhaust. That's it. Good burnout with 26 lbs of air in the tires (GS-D3's), I had a 1.92 60' time and I believe there was another .10th in it had the clutch been good. I fixed the clutch (Autozone), added a Fidanza Aluminum Flywheel and went back out. Popped a half-shaft u-joint on the the first pass at the starting line. Got that repaired, new half-shaft and all 4 u-joints. Back out again, but I had bought another ZR-1 so I didn't want to flog the car. No burnout, no air reduction in the tires, the car ran a 13.00 @ 113. The headers have now been removed to sell the car.

I think with 4:10's and Injector and Plenum work that 12.53 would have become a very low 12 or even a high 11. Remember this in Boise. Corrected for altitude it would/could have been 12.12 @ 117 (using NHRA Factors for S Stock and Stock). That's stout guys.

 

[jonszr1]

with street tires and your power you are proably better off with 3.45 than 410s. 410s amke it alot tougher to 60ft these cars . it alot easier to launch my callaway snat with 3.73s . it doesnt have headers yet and traps 113.85 .hope fully i will get the headers this week before fri so i can take her out and see how much mph different they make her. your car runs strong for your mods by the way

 

[HammerZR1]

with street tires and your power you are proably better off with 3.45 than 410s. 410s amke it alot tougher to 60ft these cars . it alot easier to launch my callaway snat with 3.73s . it doesnt have headers yet and traps 113.85 .hope fully i will get the headers this week before fri so i can take her out and see how much mph different they make her. your car runs strong for your mods by the way

Thanks. The car does run exceptionally well. I'd like to try 4.10's someday just to see if they would give me a little more control over the power on the start.

 

[jonszr1]

pete who has the fastest stk blk zr1 11,30s runs the 3.45s and think he gets a better launch with them . i have been going to the strip since 1971 and this car with 4.10 and drag radials is a tough launch to get a decent 60 ft time . part of the reason i think is the fidanza flywheel and ceramic disc . just a little to low and she bogs (see u tube vids )but am finding out that 4 k may be the sweet point . did that on my last run and ran 11,88@120.66 with a1.72 60ft. my problem is the strip is 200 miles one way from home and am afraid if i go after it too hard i will end up stranded . if you do try 410s ,i would definatly invest in some drag radials .street tires might be a real tough launch . the et streets drag radials seem nice . i might try some hoosiers or bfgs to see i if they are better . my new to me other black car has a solid rear end thats bolt in .but i am having to do some other work on it before i try it at the strip again.. i am thinking that i might want to invest in some dennys nitrus ready 1/2 shafts .our alluminium one scare me to death . bill b turned me on to the super spicer u joints . so far they are very solid. but the solid rear end is the trick way to go no worries about spitting out 1/2 shafts or snapping stub axles . have allready on the first and only test ran a string of `1.50-6 60 fts with a totally stk car with the et streets .