Help With Lt1 Rear!!

Rich Biebel · 05-19-2008, 08:38 PM

Sean...My car was much lighter...3050-3090lbs and I ran a 4.56 gear. I swapped in a 4.88 and my car slowed down. It did not like the higher rpm and it also always ran faster when I shortshifted the 1-2 and by a lot of rpm. I too was weak in 60 ft. with a best of 1.34 in killer conditions. Average was 1.40. If you have good parts and have tried a lots of stuff.....I would lean toward the tune-up in the fuel map. Did you do a chassis or engine dyno session? Unless you have a known good fuel map from someone...I think it is a must. What engine management controller do you have? If it's a Holley lots of guys have a good map for that one...... Too bad we never worked out the trade....I sold my car and bought a Racetech dragster....good luck.....Rich

05-19-2008, 08:38 PM	#4
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,315 Likes: 25 Liked 544 Times in 213 Posts	Re: Help With Lt1 Rear!! Sean...My car was much lighter...3050-3090lbs and I ran a 4.56 gear. I swapped in a 4.88 and my car slowed down. It did not like the higher rpm and it also always ran faster when I shortshifted the 1-2 and by a lot of rpm. I too was weak in 60 ft. with a best of 1.34 in killer conditions. Average was 1.40. If you have good parts and have tried a lots of stuff.....I would lean toward the tune-up in the fuel map. Did you do a chassis or engine dyno session? Unless you have a known good fuel map from someone...I think it is a must. What engine management controller do you have? If it's a Holley lots of guys have a good map for that one...... Too bad we never worked out the trade....I sold my car and bought a Racetech dragster....good luck.....Rich __________________ Rich Biebel S/C 1479 Stock 147R