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Old 05-11-2009, 05:24 AM
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Do I need a stall torque converter??

At full throttle it feels like its bogging down. Will a stall converter fix this problem? stock 700r4 trans.
Mods:
-350 4 bolt main
-bored .030 over
-Eagle crank 3.750"
-Eagle I beam connecting rods 5.7"
-Speed Pro hypereutectic pistons and rings
-External balanced
-Comp Cams camshaft 230 duration with .480" lift
-Heads stock cast iron 76cc chambers 165 intake runners
-Edelbrock RPM air-gap intake
-Edelbrock 600 cfm carb

Thanks Caleb.
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Old 05-11-2009, 06:49 AM
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At full throttle while braking on the line or at speed?
A converter with around 2000-2500rpm stall is normally used with a cam like yours.
A 383 likes more carb than 600cfm.

Brain Fart on stall rpm.

Last edited by SSedan64; 05-12-2009 at 06:47 AM.
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Old 05-11-2009, 07:15 AM
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Quote:
Originally Posted by 75GMCman
At full throttle it feels like its bogging down. Will a stall converter fix this problem?
Short answer- no.

You likely have issues w/the tune. I'd be looking at the carb and ignition curve.

Carb: Linkage adjustment- getting WOT when the pedal- not linkage at carb- is depressed. Have someone hold the accelerator pedal to the floor and see if there's any travel left at the carb, 2'ndary opening too late, too lean, too rich, wrong power valve or piston enrichment setting, are just a couple things to check.

Ignition curve: Do a quick search, there are dozens of run-down's on this no need to rehash it all now, at least until you check the carb over. Basically, see that you do have about 34-36 degrees TOTAL to start with.

EDIT- This isn't to say that a higher than stock stall TC won't help you- it will. It just won't help w/the problem you describe.

It will allow the engine to get into the fat part of the torque curve at launch. That's what a high stall TC does, besides heat up the fluid. If you get a higher than stock stall TC, get a cooler along w/it.

Last edited by cobalt327; 05-11-2009 at 08:04 AM.
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Old 05-11-2009, 07:38 AM
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Bog

Quote:
Originally Posted by cobalt327
Short answer- no.

You likely have issues w/the tune. I'd be looking at the carb and ignition curve.

Carb: Linkage adjustment- getting WOT when the pedal- not linkage at carb- is depressed. Have someone hold the accelerator pedal to the floor and see if there's any travel left at the carb, 2'ndary opening too late, too lean, too rich, wrong power valve are just a couple things to check.

Ignition curve: Do a quick search, there are dozens of run-down's on this no need to rehash it all now, at least until you check the carb over. Basically, see that you do have about 34-36 degrees TOTAL to start with.
I agree.The cam you are running does not need 3000 stall.I say carb.Go to a 750cfm.
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Old 05-11-2009, 07:37 PM
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Someone give cobalt327 a medal!!! The engine was running lean, I put the pump rod in the closest hole on the pump arm to give a huge shot of fuel and got rid of my problem!! THANKS A MILLION!!!

Caleb
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