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02-03-2001, 12:10 PM
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#1 |
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Registered Member
Join Date: Apr 1999
Location: Cincinnati,OH
Posts: 1,511
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Shift points?
I was wondering if there's a program or website that could tell me what to shift at. I know that the best way is to get the car dynoed and shift where the hp and torque curves cross...but I'm poor so that's not gonna happen. I've been shifting at about 6 grand and that feels like it's about the best place to shift but I just want to be sure. Trying to get the best ET out of this car. As soon as the track opens anyway. Thanks!
------------------ 89GT,T-5Z, D.S.S. 306 shortblock w\main support, B-303 cam, Cobra intake, GT40P heads, 1.72rr, MAC "P" headers, MAC off-road H-Pipe, MAC true-fit w\tips, 373's...and the list goes on! Throttle Junkie Powered by Ford! 12.824 @ 107.05 MPH PVT Blankenship leaving for BCT 14MAR01 MOS 67 Romeo |
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02-03-2001, 01:54 PM
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#2 |
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I need 110mph Trap Speed!
Join Date: Feb 1999
Location: So, CA
Posts: 4,315
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Just play with it at the track. I think 5900-6000 seems to be about right for the B-303 with 1.7's. I shift my E-303 at 5600rpm. It pulls a little past there, but thats where it starts to fall off and I've gotten my best results. I ran it upto 6000 on the shift points and it slowed down.
Skyler ------------------ -1989 Saleen Mustang #406- TFS Heads, Edelbrock intake, E-303, 3.73's, 1 5/8 shortys, Offroad-H, 2chamber flows, 36psi FPR, 15degrees timing, 70mm tb, 73mm maf, 24lb inj, Crank pulley, MSD6A, Alum driveshaft. Added: B&M Ripper, Subframes, & Turndowns. |
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02-04-2001, 01:37 AM
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#3 |
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Registered Member
Join Date: Apr 1999
Location: Cincinnati,OH
Posts: 1,511
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Thanks sky! That's about what I figured. I've played some and that seems to be about the best place to shift. Man I can't 'till the track opens!
 ------------------ 89GT,T-5Z, D.S.S. 306 shortblock w\main support, B-303 cam, Cobra intake, GT40P heads, 1.72rr, MAC "P" headers, MAC off-road H-Pipe, MAC true-fit w\tips, 373's...and the list goes on! Throttle Junkie Powered by Ford! 12.824 @ 107.05 MPH PVT Blankenship leaving for BCT 14MAR01 MOS 67 Romeo |
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02-04-2001, 03:15 AM
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#4 |
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Registered Member
Join Date: Jun 2000
Location: sanantonio, Tx, usa
Posts: 1,407
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Heh, guys im almost stock, and shifting by feel of the car and by ear, and i can pull off 13.9, i cant depend on the stock tack though.
------------------ 90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows. Best time: 13.9116(on 225/60/15 firehawks) Best mph: 97.80 Best 60': 2.0047 next mods: subframes, 3.73's |
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02-04-2001, 08:07 AM
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#5 |
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Moderator
Join Date: Aug 2000
Location: Milan, OH
Posts: 2,699
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I've got an explanation and demonstration of determining shift points on my website. Just follow the URL in my sig.
------------------ Jeff Chambers Trophy Stock #3 11.97 Seconds / 114.5 MPH Chambers Racing Team |
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