turbot2496
New Member
- Joined
- Mar 16, 2003
My car doesn't seem to be running enough mph in the 1/4 and I could use some input why, throw some ideals out there and maybe it'll get my gears turning I'll try to give you as much data as possible
Track Slips 4 best from fri night
.................... Run 1... Run 2... Run 3... Run 4
60'................ 1.751__ 1.739__ 1.793__ 1.816
330............... 5.361__ 5.315__ 5.335__ 5.371
1/8............... 8.366__ 8.403__ 8.424__ 8.388
mph/1/8......... 81.05__ 80.36__ 80.09__ 81.95
1000............. 11.035_ 11.075_ 11.106_ 11.034
1/4............... 13.313_ 13.339_ 13.376_ 13.290
mph.............. 98.66__ 99.23__ 98.95__ 99.64
The car.. 87 GN 140000 mi Stock turbo, untouched cleaned intercooler, K&N Filter(clean), hotwired 307 fuel pump, 50# injectors, hooker dual exhaust no cat, slicks @12 psi, adj timing chip for alky, old smc alky kit. Running 93 oct and 100% denatured. Tuning with scanmaster. New valve springs. Fresh rebuilt trans w/ new 2800rpm stall convertor. Compression tested 138 on all cylinders. New autolite 23's. TPS adjusted correctly. No floor mat and confirmed full throttle. TV cable adjusted properly and trans shifting good. 210/205 cam that was put in when stocker went flat. Fuel pressure 43psi line off.
Some more info .... I was launching the car pretty hard at about 10 psi of boost to get these times. I was progressively adding boost and showing very minor improvement. When I started out the night I was running 21psi through the traps and steadily increased it to 24 psi. That was about the ceiling before the car would register some retard. I played with the timing also steadily turning it up run to run until retard showed. First run indicated above timing was 21/23 at about 22 psi. Last run timing was 22/27 and 24psi of boost. Adding the 1 degree in first and sec gear seemed to make a signifigant difference but the track closed before I could try anymore. Never added or subtracted any fuel. Car was not popping or acting up in any way, just doesn't seem to be pulling like it should. 02's through the traps were between 7.60-7.90 all night. Any runs where my audible knock sensor went off I got out of and either added more alky or turned it down for the next run. Alky was coming in at about 14-15 pounds with the minimum spray to quench detonation. Eventually at 24 psi I was running almost top setting on smc to keep down retard.
The fastest the car has ever run was a 13.01 at 99mph with the TC locked and running Race Gas and with a hurt transmission. I didn't ever lock the TC on these runs but if I would have I could have probably matched my best time on 114oct. Car has never broke 100 mph in the quarter. This week I'm gonna leave the slicks at home and soft launch the car and just tune to get the mph up. I gonna use race gas and a 29 degree race chip and see if I get some improvement in the mph.
By looking at the timeslips the car seems to be launching ok but it just doesn't seem to be pulling like it should through the final 1/8th. I would like to see at least 104mph.
When I go back I'm going to lower the boost back to about 20psi and tune from there with a ceiling of 22psi. I'm thinking of just leaning it out until its running as fast as possible at 20-22 psi and going no higher in boost.
I know I need to get direct scan one of these days but other than that if you have any ideals for me let me know. My goals with the car are to run as fast as I can with the stock stuff and this just may be as fast as the poor old car can go . I do need to do some porting work on the intercooler and turbo some day.
Track Slips 4 best from fri night
.................... Run 1... Run 2... Run 3... Run 4
60'................ 1.751__ 1.739__ 1.793__ 1.816
330............... 5.361__ 5.315__ 5.335__ 5.371
1/8............... 8.366__ 8.403__ 8.424__ 8.388
mph/1/8......... 81.05__ 80.36__ 80.09__ 81.95
1000............. 11.035_ 11.075_ 11.106_ 11.034
1/4............... 13.313_ 13.339_ 13.376_ 13.290
mph.............. 98.66__ 99.23__ 98.95__ 99.64
The car.. 87 GN 140000 mi Stock turbo, untouched cleaned intercooler, K&N Filter(clean), hotwired 307 fuel pump, 50# injectors, hooker dual exhaust no cat, slicks @12 psi, adj timing chip for alky, old smc alky kit. Running 93 oct and 100% denatured. Tuning with scanmaster. New valve springs. Fresh rebuilt trans w/ new 2800rpm stall convertor. Compression tested 138 on all cylinders. New autolite 23's. TPS adjusted correctly. No floor mat and confirmed full throttle. TV cable adjusted properly and trans shifting good. 210/205 cam that was put in when stocker went flat. Fuel pressure 43psi line off.
Some more info .... I was launching the car pretty hard at about 10 psi of boost to get these times. I was progressively adding boost and showing very minor improvement. When I started out the night I was running 21psi through the traps and steadily increased it to 24 psi. That was about the ceiling before the car would register some retard. I played with the timing also steadily turning it up run to run until retard showed. First run indicated above timing was 21/23 at about 22 psi. Last run timing was 22/27 and 24psi of boost. Adding the 1 degree in first and sec gear seemed to make a signifigant difference but the track closed before I could try anymore. Never added or subtracted any fuel. Car was not popping or acting up in any way, just doesn't seem to be pulling like it should. 02's through the traps were between 7.60-7.90 all night. Any runs where my audible knock sensor went off I got out of and either added more alky or turned it down for the next run. Alky was coming in at about 14-15 pounds with the minimum spray to quench detonation. Eventually at 24 psi I was running almost top setting on smc to keep down retard.
The fastest the car has ever run was a 13.01 at 99mph with the TC locked and running Race Gas and with a hurt transmission. I didn't ever lock the TC on these runs but if I would have I could have probably matched my best time on 114oct. Car has never broke 100 mph in the quarter. This week I'm gonna leave the slicks at home and soft launch the car and just tune to get the mph up. I gonna use race gas and a 29 degree race chip and see if I get some improvement in the mph.
By looking at the timeslips the car seems to be launching ok but it just doesn't seem to be pulling like it should through the final 1/8th. I would like to see at least 104mph.
When I go back I'm going to lower the boost back to about 20psi and tune from there with a ceiling of 22psi. I'm thinking of just leaning it out until its running as fast as possible at 20-22 psi and going no higher in boost.
I know I need to get direct scan one of these days but other than that if you have any ideals for me let me know. My goals with the car are to run as fast as I can with the stock stuff and this just may be as fast as the poor old car can go . I do need to do some porting work on the intercooler and turbo some day.