Originally Posted by bjuice
Good Christmas eve to ya Bad Luv..and congrats on the ET'S etc...
i have several questions for ya..in reference to the gear change...2 part question and statment.
You have to make a decision do you want this a spray car,motor car or some and a lot of both..unfortuntly as you know already your gonna give up some in one area to gain in another...with this said i will give you my take on both..
1- i think you might be a tad higher then 6,000 on the high end rpm on motor pass..i am thinking more like 6500..(guess)..you ran a good 5.79 et on motor not to have turned this motor at least 6500 thru traps..plus how do you know you are shifting at 6800..do you have an electric shifter ?...Plus with that 514 gear i do not think you would have dropped 800 rpm in high gear by the time you reached the traps..My opinion here..i think the car would have lugged at 6,000 rpm..
on the other hand it could have well hit 8,000 rpm on the juice no doubt.
are you spraying right out of the hole ?..progressive or manual button ?
also how do you have your converter set up ..its it loose for max Hp.or tighter for spray ?..
if i were you and i was gonna make this a spray car..i would go to a minimum of a 4.56 or possibly a 4.30 and when time to change slicks dropped to a 32 inch tall tire ( for the 4.30 gear)...check the converter and tighten her up if not tight enough already..( last thing you want is driving thru the converter)..Run the NOS from the Line ......
if you turned that 565ci 8,000 rpm on spray it stopped pulling hard about 3/4 track...
i will bet that thing will MPH and ET more then you bargained for if you did the above...i done seen this happen too many times
if ya wanna keep it a 50/50 hp/Nos car.....no higher then 4.56 ( going to 32 inch tire) no lower then 4.86/4.88 ( staying with 33 inch tire) ( this is still pushing it in my opinion) running 200 shot out of the hole..
what i would check right now is my converter...you know better then me...but i would be somewhat concerned if my converter was to soft..for the hit...
either way i think you have a bad little ride that will run....
i am really glad you ran those numbers
Merry Christmas.
Brian
You are probably right on the motor pass as the rpms could have been 6500 but from the quick look and trying to judge the stripe i don't think it was anymore than that.Now for the 8000 rpms on the juice it didn't happen because i had my high side chip at 8000.I was concerned it would get in to it when i up'ed the jet 50 more hp and turned the second on sooner,so i looked at the tach before the stripe several times before i got there so i could lift if needed.You are probably right on the cam running out of the rpm range also.I think it goes to 7400 and it's probably not that much in this size motor.The converter is on the tight side,and is a 10" on top of that.I can really say that it was not driving threw the converter,as the shift was on out even with the jet change.I do have an electric shift sol with an rpm switch.I do appreciate the input and Merry Christmas to you'all.