Gear split

MEXJOE · 04-04-2011, 06:59 PM

How much ratio split between 1st & 2nd gear is the best?
Or should I say will be quicker?

Dyno · 04-04-2011, 07:56 PM

I will ask 1st, what transmission? Snow gone up there yet? Dyno

GTX JOHN · 04-05-2011, 01:30 AM

There are a bucket of variables and options ( At least on our Pro Trans ). Can you share some information on your combination.

MEXJOE · 04-05-2011, 10:14 AM

200 metric
325 hp 396 Camaro e/sa
How much starting line ratio will be to much?

gsa612 · 04-05-2011, 11:59 AM

Glen, depends on the cam lobe centre, duration, shift point. With my combo if I hold it in first gear to long it will lose a tenth. John gsa 612

ron mattson · 04-05-2011, 12:58 PM

I would think the wider your powerband between peak tq and hp the more split
you could tolerate, with that being said its still some trial and error as some cars fall
back more on the shift than others. converter, rear gears and weight all come into
play but i think your big block may tolerate more split than a low tq small block.

GTX JOHN · 04-05-2011, 01:28 PM

We currently have two E/SA cars.....71 Dart 340/314 and
73 Plymouth 440/345. Both have very aggressive cams in duration @ .050 (265+) and very close lobe center (106). I do not know what is normal because
we march to beat of our own drum around here.

As different as they are they both like 2.75 low and being short shifted
out of low ( 400 - 500 below 2 - 3 shift. Hopes this helps.

04-04-2011, 06:59 PM	#1
MEXJOE Senior Member Join Date: Jun 2008 Location: nhranumbers.com Posts: 875 Likes: 137 Liked 165 Times in 51 Posts	Gear split How much ratio split between 1st & 2nd gear is the best? Or should I say will be quicker? Last edited by MEXJOE; 04-04-2011 at 07:27 PM.

04-04-2011, 07:56 PM	#2
Dyno Senior Member Join Date: Dec 2002 Posts: 913 Likes: 1,124 Liked 679 Times in 202 Posts	Re: Gear split I will ask 1st, what transmission? Snow gone up there yet? Dyno

04-05-2011, 01:30 AM	#3
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,723 Likes: 2,774 Liked 2,445 Times in 690 Posts	Re: Gear split There are a bucket of variables and options ( At least on our Pro Trans ). Can you share some information on your combination.

04-05-2011, 10:14 AM	#4
MEXJOE Senior Member Join Date: Jun 2008 Location: nhranumbers.com Posts: 875 Likes: 137 Liked 165 Times in 51 Posts	Re: Gear split 200 metric 325 hp 396 Camaro e/sa How much starting line ratio will be to much? Last edited by MEXJOE; 04-05-2011 at 10:25 AM.

04-05-2011, 11:59 AM	#5
gsa612 Senior Member Join Date: Jan 2008 Location: 100th Meridian Posts: 569 Likes: 116 Liked 280 Times in 139 Posts	Re: Gear split Glen, depends on the cam lobe centre, duration, shift point. With my combo if I hold it in first gear to long it will lose a tenth. John gsa 612

04-05-2011, 12:58 PM	#6
ron mattson Member Join Date: Nov 2005 Location: cloquet mn Posts: 465 Likes: 17 Liked 66 Times in 29 Posts	Re: Gear split I would think the wider your powerband between peak tq and hp the more split you could tolerate, with that being said its still some trial and error as some cars fall back more on the shift than others. converter, rear gears and weight all come into play but i think your big block may tolerate more split than a low tq small block. __________________ Ron Mattson 5015 STK

04-05-2011, 01:28 PM	#7
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,723 Likes: 2,774 Liked 2,445 Times in 690 Posts	Re: Gear split We currently have two E/SA cars.....71 Dart 340/314 and 73 Plymouth 440/345. Both have very aggressive cams in duration @ .050 (265+) and very close lobe center (106). I do not know what is normal because we march to beat of our own drum around here. As different as they are they both like 2.75 low and being short shifted out of low ( 400 - 500 below 2 - 3 shift. Hopes this helps.