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Old 08-26-2013, 01:13 PM
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T-350 torque convertor

1979 z28 Rebuilding sbc to 425hp, th350 3.43 gears. 275/60/15 rear tires.

Current convertor is 2400 stall, while i have everything apart should i put in a 3000 stall?

Down the road i will be changing gears to 3.73.

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Old 08-26-2013, 04:01 PM
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It is important the the converter match the cam and intake setup as well. If you want good answers here post all the engine specs, weight of the car etc.
Most of the converter companies have a calculator on their web sites.
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Old 08-26-2013, 06:15 PM
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1996 .030 over block, forged scat rods, scat crank, speed pro pistons 10.1cr using pro comp 3001 aluminum angle plug heads 64cc 2.02 intake/1.60 exhaust. 1.6 roller rockers with girdles.

Current cam is LT4 Hot Cam duration at .050" tappet lift (intake/exhaust) is 218/228; and maximum lift with 1.6 rocker ratio (intake/exhaust) is 525/525. Roller lifters.

Intake will be a edelbrock performer rpm 7116 and a 670 cfm avenger carb.

Approx curb weight 3833 lbs
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Old 08-26-2013, 07:05 PM
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Quote:
Originally Posted by maddart View Post
1996 .030 over block, forged scat rods, scat crank, speed pro pistons 10.1cr using pro comp 3001 aluminum angle plug heads 64cc 2.02 intake/1.60 exhaust. 1.6 roller rockers with girdles.

Current cam is LT4 Hot Cam duration at .050" tappet lift (intake/exhaust) is 218/228; and maximum lift with 1.6 rocker ratio (intake/exhaust) is 525/525. Roller lifters.

Intake will be a edelbrock performer rpm 7116 and a 670 cfm avenger carb.

Approx curb weight 3833 lbs
425hp is a stretch on that combo.....not being a dck, but if the parts are not bought yet then there are better choices.
That being said, yes, a 3000stall is going to better suit your needs.
Of the shelf B&M or Hughes have both been pretty solid for me.
For a custom converter you have many choices
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Old 08-26-2013, 08:08 PM
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Suggestions on a better combo are appreciated. This is the current setup of the motor.
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Old 08-26-2013, 10:23 PM
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Suggestions on a better combo are appreciated. This is the current setup of the motor.
Well the heads right off the bat, IIRC the 3001's are a 160cc head, and the flow numbers were weak even for a tiny head.
For a street 355 look at the Jegs 195 house brand, they are made by Pro-Filer and rival far more expensive (ie:AFR) for half the price. Pro-filer them selves are out of stock right now but the re-branded Jegs pieces are in stock and about 1100$ to your door. I cannot begin to explain the dramatic difference from what you have now.
And buy a real Carb, if your going to step up to 373 or greater gear, and a 3000stall, then get a 750DP on it and let it eat. Quick fuel, Holley, pro form.....pick your poison, any will meet your requirements.
Its a little under cammed for what I would want, but even with the little Hot Cam its likely to meet your goals with the right heads and Carb.
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Old 08-26-2013, 10:24 PM
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Your PN# for the heads
JEGS Performance Products 514032 JEGS Small Block Chevy Cylinder Heads
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Old 08-26-2013, 10:28 PM
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Here's the cam I would choose with a 1.6 rocker.
http://www.summitracing.com/parts/hr...make/chevrolet
This would make a vicious little street motor but very drivable.
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Old 08-27-2013, 12:08 PM
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3000 stall it is. The pro comps are the 190cc heads. Will keep the cost down this year and run these for now. Any suggestions as to valve springs or will the ones that came with the lt4 hotcam kit work??
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Old 08-27-2013, 12:10 PM
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L98 IRON VS PRO COMP 190 AS CAST

INTAKE AIRFLOW DATA CFM
@28 INCHES
Lift L98 Pro Comp 190
.100 52 58
.200 108 113
.300 153 160
.400 178 199
.500 191 227
.600 190 244

L98 IRON VS PRO COMP 190 AS CAST
EXHAUST AIRFLOW DATA CFM
@28 INCHES
Lift L98 Pro Comp 190
.100 39 52
.200 80 98
.300 116 132
.400 136 161
.500 146 180
.600 147 192
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Old 08-27-2013, 08:04 PM
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Quote:
Originally Posted by maddart View Post
L98 IRON VS PRO COMP 190 AS CAST

INTAKE AIRFLOW DATA CFM
@28 INCHES
Lift L98 Pro Comp 190
.100 52 58
.200 108 113
.300 153 160
.400 178 199
.500 191 227
.600 190 244

L98 IRON VS PRO COMP 190 AS CAST
EXHAUST AIRFLOW DATA CFM
@28 INCHES
Lift L98 Pro Comp 190
.100 39 52q
.200 80 98
.300 116 132
.400 136 161
.500 146 180
.600 147 192
And now the pro-filer heads

195cc with 2.02 Valves
. Same exhaust port as 185cc..
200. 145 110.
300. 209 145.
400. 254 180.
500. 273 206.
600. 274 213

You see what im saying? This is where your money gets your biggest return.
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