60ft, 330ft help - Page 2

pfordamx · 07-20-2017, 09:09 PM

Quote:

Originally Posted by Hacksaw

Like 4 weeks ago you couldn't get down the track and several posters tried their best to figure out your problem. Now your concerned over .020 in your 60' times? How about you make some laps and figure some of this stuff out yourself ?

Fair enough, sorry if i annoy you, yes we've had alot of issues with this car and i appreciate the help and listen to what you guys have to say i don't think i've ever been rude or unappreciative. also i enjoy talking about racing and seeing what people who've spent years getting the absolute most out of there combinations have to say, theirs a reason i come to this board to ask questions, its because i have tons of respect for stock and superstock racers, and admire what you guys do. i can lay off but i just like the advice and to keep sharing whats going on, this has been a big learning experience. and now that the cars coming around were still trying to find some et that should be in there and who better to ask. yeah i had already thought about gears, sue me i asked i question i had a inkling of an answer too, in order to stir some discussion and see if anybody had any other hints.

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.

Alan Nyhus · 07-21-2017, 10:52 AM

Pfordamx- No doubt you need a convertor and gear change to get your 60 fts. to improve. One thing you may want to try....stay off the two step and leave at 2000-2200. This may let the convertor 'work' a bit harder and let it flash a bit higher...might give you some insight before you spend any cash.

Also, be aware that Stockers and Super Stock cars have very aggressive convertors. You may, or may not, want that same aggressive convertor in a bracket application. Spending some time correlating similar et's/60 fts. for cars that run similar times to yours and looking at the 60's for similar e.t.'ing Stock/SS cars can be pretty revealing.

P.S. - AMX's are 'way cool.....

07-20-2017, 10:14 PM	#12
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	#13
pfordamx Member Join Date: Sep 2011 Location: Oklahoma City, OK Posts: 214 Likes: 3 Liked 7 Times in 5 Posts	Re: 60ft, 330ft help its just the stock 2.45

07-20-2017, 10:50 PM	#14
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	#15
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	#16
pfordamx Member Join Date: Sep 2011 Location: Oklahoma City, OK Posts: 214 Likes: 3 Liked 7 Times in 5 Posts	Re: 60ft, 330ft help engine stroke is 3.85

07-20-2017, 11:56 PM	#17
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	#18
Hacksaw Senior Member Join Date: Sep 2016 Posts: 838 Likes: 148 Liked 276 Times in 151 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	#19
HP HUNTER Senior Member Join Date: Feb 2012 Location: Colorado Springs Colorado/Thousand Oaks Ca Posts: 606 Likes: 68 Liked 238 Times in 97 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.

07-21-2017, 10:52 AM	#20
Alan Nyhus VIP Member Join Date: Dec 2002 Location: Lower Dakota territory Posts: 1,163 Likes: 1,013 Liked 761 Times in 225 Posts	Re: 60ft, 330ft help Pfordamx- No doubt you need a convertor and gear change to get your 60 fts. to improve. One thing you may want to try....stay off the two step and leave at 2000-2200. This may let the convertor 'work' a bit harder and let it flash a bit higher...might give you some insight before you spend any cash. Also, be aware that Stockers and Super Stock cars have very aggressive convertors. You may, or may not, want that same aggressive convertor in a bracket application. Spending some time correlating similar et's/60 fts. for cars that run similar times to yours and looking at the 60's for similar e.t.'ing Stock/SS cars can be pretty revealing. P.S. - AMX's are 'way cool..... __________________ "That'll never work....."