boldm
Jan 20th, 05, 9:46 PM
Wanting to upgrade my converter for 2005, need input, I'll start with my combo:
84 chev 1/2 ton 2wd Silverado long box, street/strip driven approx 5000 miles/year mostly to and from car shows and drag strips and approx 75-100 1/4 passes. Truck weight is 4400lbs with driver, here's my combo. SBC 406, 750DP, Edel Perf RPM air gap, port matched to ported AFR190cc heads (now 205cc), 68cc chambers, flat top pistons, tight quench giving 10.5-1 compression. Crane HR 119661 cam, 230/238/112LS degreed at 106 ICL, .574 int lift w 1.6 rocker, .558 exh lift with 1.5 rocker. 1 3/4" hedman headers, 3" collector......700R4 trany, 30 spline, 4.10 gear, 26"slick on the track, 28" tire on the street. This engine peak torque is at 4500 rpm and peak hp is 478 at 5700 through the exhaust, corrected for sea level. I usually race at 2300 ft above sea level. My existing converter is a 12" lock up converter which gives me 1800 foot stall and approx 2300 flash stall. The shift extension when I shift at 6000 is approx 4200 rpm. As you can see with this converter I'm leaving some ET behind, so here is what I would like to do.....
Up the stall speed to flash up to 3400-3500 RPM off the line. My drag racing is bracket racing therefore consistency is what wins, so therefore I don't want a converter that shocks the tires to hard.
Shift extension; the 4200 I have now is definitely to low so I'm thinking something in the 4800 to 5000 rpm would work well.
I would also need reasonable street manners, I don't want something that going to be slipping like crazy trying to pull away from a stop sign, mind you a 3.06 first gear and 4.10 rear gear should help here, and once I'm up to speed or on the highway, the lockup will take care of any slippage.
So to paraphrase, somewhat decent street manner, soft hit, high SE. Really looking for a compromise between streetability, consistency and the best ET. One converter that I have considered is a TCI 10" streetfighter part# 243106, but with so many converter companies out there I would like to check other alternatives. Some other converter's I've thought about as well are (which may need a custom build for my application are), BTE 9.5", ATI, and a PT4000 Yank, (what's the deal with Yank, some of the LS1 forums sure brag these things up and they have a nice website ??) Any way's I think you've had enough to read, I would appreciate any expertise you could pass along in helping me with my next converter or contacts. Thx.
84 chev 1/2 ton 2wd Silverado long box, street/strip driven approx 5000 miles/year mostly to and from car shows and drag strips and approx 75-100 1/4 passes. Truck weight is 4400lbs with driver, here's my combo. SBC 406, 750DP, Edel Perf RPM air gap, port matched to ported AFR190cc heads (now 205cc), 68cc chambers, flat top pistons, tight quench giving 10.5-1 compression. Crane HR 119661 cam, 230/238/112LS degreed at 106 ICL, .574 int lift w 1.6 rocker, .558 exh lift with 1.5 rocker. 1 3/4" hedman headers, 3" collector......700R4 trany, 30 spline, 4.10 gear, 26"slick on the track, 28" tire on the street. This engine peak torque is at 4500 rpm and peak hp is 478 at 5700 through the exhaust, corrected for sea level. I usually race at 2300 ft above sea level. My existing converter is a 12" lock up converter which gives me 1800 foot stall and approx 2300 flash stall. The shift extension when I shift at 6000 is approx 4200 rpm. As you can see with this converter I'm leaving some ET behind, so here is what I would like to do.....
Up the stall speed to flash up to 3400-3500 RPM off the line. My drag racing is bracket racing therefore consistency is what wins, so therefore I don't want a converter that shocks the tires to hard.
Shift extension; the 4200 I have now is definitely to low so I'm thinking something in the 4800 to 5000 rpm would work well.
I would also need reasonable street manners, I don't want something that going to be slipping like crazy trying to pull away from a stop sign, mind you a 3.06 first gear and 4.10 rear gear should help here, and once I'm up to speed or on the highway, the lockup will take care of any slippage.
So to paraphrase, somewhat decent street manner, soft hit, high SE. Really looking for a compromise between streetability, consistency and the best ET. One converter that I have considered is a TCI 10" streetfighter part# 243106, but with so many converter companies out there I would like to check other alternatives. Some other converter's I've thought about as well are (which may need a custom build for my application are), BTE 9.5", ATI, and a PT4000 Yank, (what's the deal with Yank, some of the LS1 forums sure brag these things up and they have a nice website ??) Any way's I think you've had enough to read, I would appreciate any expertise you could pass along in helping me with my next converter or contacts. Thx.