Rear Gear Question

gsa612 · 09-17-2013, 11:28 AM

Is it 2.75 low, how fast have you gone 60', ET, mph?, shift points?. I would try 4.88, your 600 lbs. heavier than me.The difference between .56's and .88's is about 300 rpm on top end.You have to move that weight off the line in order for it to ET well.

njk53 · 09-17-2013, 01:29 PM

First gear is 2.75. Fastest the car has ever gone was at Martin last August. 60' was 1.62 ET was 12.25 @ 108 MPH. We have played around with shift points from 6150 to 6250. Didn't really make a difference. We were at the track last Friday and the best I went was 12.39 @ 107. The air was good and it was a nice cool day, should have gone better than what we did.

I have to admit, most of the time when I go through the lights, the shift light does not come on in 3rd gear, so I am not reaching the set engine RPM.

My brother and I feel the car has more in it but are struggling to find the extra ET and speed.

09-17-2013, 11:28 AM	#1
gsa612 Senior Member Join Date: Jan 2008 Location: 100th Meridian Posts: 569 Likes: 116 Liked 280 Times in 139 Posts	Re: Rear Gear Question Is it 2.75 low, how fast have you gone 60', ET, mph?, shift points?. I would try 4.88, your 600 lbs. heavier than me.The difference between .56's and .88's is about 300 rpm on top end.You have to move that weight off the line in order for it to ET well.

09-17-2013, 01:29 PM	#2
njk53 Senior Member Join Date: Jul 2007 Location: East China, MI Posts: 504 Likes: 0 Liked 0 Times in 0 Posts	Re: Rear Gear Question First gear is 2.75. Fastest the car has ever gone was at Martin last August. 60' was 1.62 ET was 12.25 @ 108 MPH. We have played around with shift points from 6150 to 6250. Didn't really make a difference. We were at the track last Friday and the best I went was 12.39 @ 107. The air was good and it was a nice cool day, should have gone better than what we did. I have to admit, most of the time when I go through the lights, the shift light does not come on in 3rd gear, so I am not reaching the set engine RPM. My brother and I feel the car has more in it but are struggling to find the extra ET and speed. __________________ Nelson Kowal Stock 345