Hantzum

iTrader: (13)

Ok, I have a huge dilemma, I have a 98 f-body with a 408 stroker and what was a 4L60E trany with 4.10 gears and stock suspension with a 200 shot of NOS. I was running 1.56 60 foot 6.96 1/8 mile and 11.12 in the 1/4. I changed the trany to a turbo 350 with trans brake and 4800 stall, moser 12bolt with a 3.73 gear ratio, steel tube drive shaft and complete BMR rear suspension including torque arm, upper control, lower control , panhard rod, all of which are adjustable and QA shocks with factory springs. The only thing that is still stock on this car is the K- member A arms and front shocks. I am running 28" 10.5 drag and skinnys on the front. My problem is that my car is now almost a full second slower in quarter and and running a 1.75 60 foot and 7.5 1/8 mile. I know that I am not hooking when I foot brake, trans brake and especially trans brake with nitrous.

Any body have any ideas on whats going on.

84ls1_transam

iTrader: (11)

Well,l you changed the rear gears, which will make you slower, and I'm not sure what the ratios are of the trannys, but I think the 350 has a numercally lower 1st and maybe second gear. I would change the rear gears.

jay_lt4

iTrader: (4)

1st gear ratio:

4l60E = 3.06:1

th350 = 2.52:1

rear end you had 4.10:1 and now you have 3.73:1

are you trying to make the car slower?

both of the changes you made will hurt your 60ft times


something still is not right,, my s-10 has a th350 and 3.73 rear end and only a 364 ci ls engine and with 125 jets it runs 10's with a 1.7 60 ft time

you have a stroker 408 engine and should be making way more power than my junkyard 6.0 engine,, is your engine hurt?, i would do a compression and leak down test, you should be running easy low 10's with that combo


.

Hantzum

iTrader: (13)

Thanks for the reply, I know that I made the car less quick when I wen to a 3.73 gear. I did that on purpose because I was running out of gear with my 4.11 by the end of the quarter. Almost completely out, like 6700 RPM's. I wanted more flex room for the NOS. I just need to know why you think my car is not hooking up with those huge *** slick I have on it. All calibers have been shimmed and spaced properly, the damn thing just will not hook. Am I having a rebound issue. I know for a fact that this thing should be running in the low 10's solid with my current set up.
Any Ideas
Thanks again for the reply

jay_lt4

iTrader: (4)

even with a 1.7 60ft you should have no problems making a 10 sec run, my 94 camaro ran a mid 10 with a 1.6 60 ft time, and my s-10 runs a 1.7 60ft spinning

this is why i think you may be down on power or some other issue