Re: Rear Gear Question
 

My advise it: "Listen to Mark" and save some money down the road....For that matter, if anyone can make a 2 ton car run.......442Olds..knows

Re: Rear Gear Question
 

Transmission is a TH 350 with a 4800 stall converter. Engine RPM through the lights is 6200

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.

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.

Re: Rear Gear Question
 

Something's not right, your trap rpm seems low with 4.56's, I don't know what cam you got. What's the spring pressure? I'm going through at 6700 with.56's with the 94'tire. Mine goes 11 teens on a average day with 1.45 60' in G.(with no ice or lw oil).I found on these motors because of the cyl. heads (105cc) and the lower piston dome require a different set up than a 325-396 in terms of total timing, jetting, cam position, usable rpm. I would try .88's on your car if the springs check out ok. On a side note NHRA's Danny Gracia ran a wagon like yours a while back(80's). I was going through teardown 20+ years ago and he gave me some good advice/tips on the 402 combo lol..

Re: Rear Gear Question
 

GSA612 you have a PM

Re: Rear Gear Question
 

Would you happen to have run the engine on a dyno, and know what the basic HP and Torque curves are ? When you say you have a 4800 stall converter, is that what it flashes to off the starting line ?

Re: Rear Gear Question
 

I have dyno sheets. Yes the conver flashes @ 4800 at the starting line.

Re: Rear Gear Question
 

Just curious what rpm peak torque and peak HP is at. Converter seems pretty tight.

Re: Rear Gear Question
 

I'll look at the dyno sheet and let you know.