YDLUZ
10-06-2005, 11:35 PM
okay, re-cap:
I have a 3,500 lb (w/drv) '71 Camaro street car, ran 9.61 @ 137.6 back in May, 65 degree day and no humidity. Pulled a strong 1.33 60' in a 75' wheelie and the pass before 1.31 60' spinning hard because I forgot to let air out of the slicks. Ran 3.87 330' and 6.06 @ 111.5 1/8. This was on a .087 nos / .091fuel (around a 235 hp shot) big shot plate, 6 psi fuel pres, 1,000 bottle pres, 434 sbc. Launch rpm was way high, footbraking left at about 6,000 rpm when I floored it on a mtr that I shift at 6,800 rpm. I was in high gear before the 330' mark and pulling over 7,500 rpm through the traps. Conclusion - blowing through the N/A converter!!!
Last night:
Same as above with new 9.5" tight nitrous converter, set up for 350 shot tune-up and ran more spray - .098 nos / .096 fuel (around a 280 hp shot). Planned to go up to the 350 tune-up and lean it out but got stopped because no license. Would only 60' a 1.420 leaving on the bottle - no tire spin at all and very low rpm launch-will only foot brake 1,800 rpm. Ran a 6.098 @ 115.03. So, gained 3.51 mph there but lost e.t. because the bad 60'. Ran 9.525 @ 142.91 1/4. So, gain of 5.31 mph & .085 in e.t. So, made up the loss in 60' plus overcame the terrible heat / humidity to gain 5.31 mph. Trapped 7,000 rpm.
So...
The converter is putting more pwr to the wheels + some more pwr in N20.
But....the 60' time is almost a 10th slower - ouch!!!!!
QUESTION:
How about a trans brake?????????? The car will hold the pwr easy, hell I bet it will hold a 1.20 60' time. Yank Racing (the torque converter co) thinks this is the best option. AND-go to more pwr on launch with the 350 shot. How would this work, can I floor it against the brake on the bottle??? I've nvr had a brake so I'm clueless? Is this the right move??? They said if I loosen the converter up I'm gonna have problems on the big end again. Especially on the 350 shot.
Thank You for any help!!!
I have a 3,500 lb (w/drv) '71 Camaro street car, ran 9.61 @ 137.6 back in May, 65 degree day and no humidity. Pulled a strong 1.33 60' in a 75' wheelie and the pass before 1.31 60' spinning hard because I forgot to let air out of the slicks. Ran 3.87 330' and 6.06 @ 111.5 1/8. This was on a .087 nos / .091fuel (around a 235 hp shot) big shot plate, 6 psi fuel pres, 1,000 bottle pres, 434 sbc. Launch rpm was way high, footbraking left at about 6,000 rpm when I floored it on a mtr that I shift at 6,800 rpm. I was in high gear before the 330' mark and pulling over 7,500 rpm through the traps. Conclusion - blowing through the N/A converter!!!
Last night:
Same as above with new 9.5" tight nitrous converter, set up for 350 shot tune-up and ran more spray - .098 nos / .096 fuel (around a 280 hp shot). Planned to go up to the 350 tune-up and lean it out but got stopped because no license. Would only 60' a 1.420 leaving on the bottle - no tire spin at all and very low rpm launch-will only foot brake 1,800 rpm. Ran a 6.098 @ 115.03. So, gained 3.51 mph there but lost e.t. because the bad 60'. Ran 9.525 @ 142.91 1/4. So, gain of 5.31 mph & .085 in e.t. So, made up the loss in 60' plus overcame the terrible heat / humidity to gain 5.31 mph. Trapped 7,000 rpm.
So...
The converter is putting more pwr to the wheels + some more pwr in N20.
But....the 60' time is almost a 10th slower - ouch!!!!!
QUESTION:
How about a trans brake?????????? The car will hold the pwr easy, hell I bet it will hold a 1.20 60' time. Yank Racing (the torque converter co) thinks this is the best option. AND-go to more pwr on launch with the 350 shot. How would this work, can I floor it against the brake on the bottle??? I've nvr had a brake so I'm clueless? Is this the right move??? They said if I loosen the converter up I'm gonna have problems on the big end again. Especially on the 350 shot.
Thank You for any help!!!