finish line rpm vs launch

[4spdJohnny]

Thanks Phillip, gives me a little confidence!

Mark, I have a set of 4.88's to try since I'm expirementing didn't wanna pop for new and 5.13 just seem like such a small change?

Jeff, I agree and in fact originally intended on putting 4spd in wagon but now my 16 year old son is racing it and we aren't quite sure if he inherited 4spd gene! rest assured my road runner is still a stick and am building another 70 road runner 440-6pak 4spd combo for stock eliminator. When you say short shift you would shift 1-2 even lower like 5800?

[4spdJohnny]

Sorry Mark, 12.70, 1.69 60 ft 102.8 mph in 3600 ft air with a 25 mile an hour cross wind (I'm sure doesnt effect this aerodynamically superior race car at all!) Brakes were also slightly dragging that day (Strange disc all corners) have since installed adjustable pushrod and springs inbetween pads in calipers seems to have cured. have also switched the car to cal-tracs now so we wil see. Nothing like changing 6 things at once in a combo but I think all right direction also took weight out to move from k to j since those time slips

[Jeff Lee]

Originally Posted by 4spdJohnny

Thanks Phillip, gives me a little confidence!

Mark, I have a set of 4.88's to try since I'm expirementing didn't wanna pop for new and 5.13 just seem like such a small change?

Jeff, I agree and in fact originally intended on putting 4spd in wagon but now my 16 year old son is racing it and we aren't quite sure if he inherited 4spd gene! rest assured my road runner is still a stick and am building another 70 road runner 440-6pak 4spd combo for stock eliminator. When you say short shift you would shift 1-2 even lower like 5800?

Yes, shift 1-2 at a lower RPM than the other gears.
That 16 year old needs to start racing the right way. Give him the 4-speed and put the 2.77 trans in your wife's grocery getter!

[Mike Taylor 3601]

Turn Junior loose w stick, the stick gene seems to be passed to each generation,if he can't drive stick,then I would go for paternity test then.LOL
My son was driving FWD nova w/stick @ 9 years old,took his 25 year old uncle for ride uncle told him he could'nt drive stick shift,he told his uncle I'll teach you.LOL
Mike Taylor 3601

[4spdJohnny]

You guys are making me feel so ashamed! I feel like I've betrayed the 4spd brotherhood. He raced our old 79 St Regis cop car when he was 14 and 15 in our local tracks "teen championship race" and actually won once and runnerup twice he's a pretty good light cutter but had to leave it in drive so he wouldnt forget to shift! Last year he blew up the old farm truck driving it to town in low lock! This car was supposed to be a spend no $ and drive it deal and now I'm buyin slush box parts... how'd this happed that could have went towards jerico! Sons tow truck is a 93 cummins with 350,000+ on it with a 5 spd (pistol grip shifter out of road runner of course) if he gets through year getting 4spd trained with that then we'll consider J/S no A!

[Mike Taylor 3601]

Maybe you need the shift point shock collar I just don't understand why I have'nt had any luck selling them. If you need shift light they work better than light driver can stare at light and wonder what is that light for,but the shock collar eliminates any daydreaming and missing shift points.
Mike Taylor 3601

[Jim Wahl]

I agree, the 5.13 I think would work better. Lower the shift point by 200 and with the 5.13 should put you in the sweet spot. My Volare has a 4.88 and it weighs in at 3500+ with normal trap rpms at 7200-7400. That is using the 30" radial. I'm thinking that 383 was all out of steam before the 1000' mark at 7400. Jim

[Eric Merryfield]

Originally Posted by Jim Wahl

I agree, the 5.13 I think would work better. Lower the shift point by 200 and with the 5.13 should put you in the sweet spot. My Volare has a 4.88 and it weighs in at 3500+ with normal trap rpms at 7200-7400. That is using the 30" radial. I'm thinking that 383 was all out of steam before the 1000' mark at 7400. Jim

my 383 stocker motor(old school 1993 motor) with 2.45 727 and 4.56 would go through the traps at 6200.......by comparison....4speed jericho, 5.13 7000-7200.....109-111 mph either way.....not running out of steam, but with the 4.56 seemed like it wanted it to be a 1/3 mile race! With the 70 you are limited by your 600 cfm holley a bit.

Exhaust with 4.56 dead hooker supercomps, and dynomax ultraflow, with stick TTI's.....nothing sexy.

My vote for the combo with a auto would be 4.88....unless you have done work to the motor and carb and exhaust system to let it make hp that much higher.

Or you could just put the stick in it and not have to learn all about the automatics!

Eric