60ft, 330ft help

Mike Rietow · 07-20-2017, 10:14 PM

What low gear ratio is in the transmission?

pfordamx · 07-20-2017, 10:38 PM

its just the stock 2.45

casrak7 · 07-20-2017, 10:50 PM

I still think the converter is off.....or the engine tune somewhat. Even with lack of gear, the thing should sixty harder......at least .07. Converter is I'd bet 80-90% of the sixty. Gear is the rest. But if the timing/jetting isnt right, that could explain alot also.

Mike Rietow · 07-20-2017, 10:57 PM

What's the stroke on the engine?

pfordamx · 07-20-2017, 11:24 PM

engine stroke is 3.85

Mike Rietow · 07-20-2017, 11:56 PM

Torque converter like the other man said. I have a 23* sbc 3.875 stroke crank with a set of cylinder heads that flow 326 @0.700lift. 3250 pd car goes 1.27 60ft N/A with a 8.94 starting line ratio on a 28 x 10.5 bias M/T. Your starting line ratio is 10.05. if your'e optimum shift is at 7600rpm the observed stall should be around 6200 with a 3sp transmission, maybe a cats whisker more. I wouldnt change the gear without a converter adjustment. No way, it won't go down consistently.

Hacksaw · 07-21-2017, 08:39 AM

Pfordamx: I don't mind trying to help out a racer that has a problem. Just think you need to go down the track many more times and tune what you already have. You seem too quick to start jumping into parts swapping. Flog what you have, evaluate, then make one change. This takes time and patience. Good luck.

HP HUNTER · 07-21-2017, 09:58 AM

Rims
Tires
TQ Converter
Gears
Trans

425 HP runs 7.0 @ 3250. 1320 divided by 124.7 = 10.58.

07-20-2017, 10:14 PM	#1
Mike Rietow Junior Member Join Date: Apr 2017 Posts: 93 Likes: 19 Liked 30 Times in 16 Posts	Re: 60ft, 330ft help What low gear ratio is in the transmission?

07-20-2017, 10:38 PM	#2
pfordamx Member Join Date: Sep 2011 Location: Oklahoma City, OK Posts: 215 Likes: 3 Liked 7 Times in 5 Posts	Re: 60ft, 330ft help its just the stock 2.45

07-20-2017, 10:50 PM	#3
casrak7 Junior Member Join Date: Jul 2011 Posts: 63 Likes: 0 Liked 3 Times in 2 Posts	Re: 60ft, 330ft help I still think the converter is off.....or the engine tune somewhat. Even with lack of gear, the thing should sixty harder......at least .07. Converter is I'd bet 80-90% of the sixty. Gear is the rest. But if the timing/jetting isnt right, that could explain alot also.

07-20-2017, 10:57 PM	#4
Mike Rietow Junior Member Join Date: Apr 2017 Posts: 93 Likes: 19 Liked 30 Times in 16 Posts	Re: 60ft, 330ft help What's the stroke on the engine?

07-20-2017, 11:24 PM	#5
pfordamx Member Join Date: Sep 2011 Location: Oklahoma City, OK Posts: 215 Likes: 3 Liked 7 Times in 5 Posts	Re: 60ft, 330ft help engine stroke is 3.85

07-20-2017, 11:56 PM	#6
Mike Rietow Junior Member Join Date: Apr 2017 Posts: 93 Likes: 19 Liked 30 Times in 16 Posts	Re: 60ft, 330ft help Torque converter like the other man said. I have a 23* sbc 3.875 stroke crank with a set of cylinder heads that flow 326 @0.700lift. 3250 pd car goes 1.27 60ft N/A with a 8.94 starting line ratio on a 28 x 10.5 bias M/T. Your starting line ratio is 10.05. if your'e optimum shift is at 7600rpm the observed stall should be around 6200 with a 3sp transmission, maybe a cats whisker more. I wouldnt change the gear without a converter adjustment. No way, it won't go down consistently. Last edited by Mike Rietow; 07-21-2017 at 12:02 AM.

07-21-2017, 08:39 AM	#7
Hacksaw Senior Member Join Date: Sep 2016 Posts: 887 Likes: 210 Liked 314 Times in 177 Posts	Re: 60ft, 330ft help Pfordamx: I don't mind trying to help out a racer that has a problem. Just think you need to go down the track many more times and tune what you already have. You seem too quick to start jumping into parts swapping. Flog what you have, evaluate, then make one change. This takes time and patience. Good luck.

07-21-2017, 09:58 AM	#8
HP HUNTER Senior Member Join Date: Feb 2012 Location: Colorado Springs Colorado/Thousand Oaks Ca Posts: 656 Likes: 86 Liked 373 Times in 129 Posts	Re: 60ft, 330ft help Rims Tires TQ Converter Gears Trans 425 HP runs 7.0 @ 3250. 1320 divided by 124.7 = 10.58. Last edited by HP HUNTER; 07-21-2017 at 10:04 AM.