whats the max boost that a stock 350 engine could take?
02-11-2007, 10:52 PM
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Car: 1986 CHEVY CAMARO IROC-Z
Engine: Twin Turbo 383 (1190hp 1249Tq)
Transmission: 1000 rated T56 6 speed manual
Axle/Gears: 3.73 Posi & mini spool & 28 spline
whats the max boost that a stock 350 engine could take?
Whats the max boost that a stock 350 engine could take with to4e .57 twin turbo?
Last edited by Superior Styles; 02-12-2007 at 01:04 AM.
02-12-2007, 12:02 AM
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Car: 87 IROC-Z28
Engine: 414ci Twin Turbo
Transmission: T56
Axle/Gears: Ford 9"
02-12-2007, 01:04 AM
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Car: 1986 CHEVY CAMARO IROC-Z
Engine: Twin Turbo 383 (1190hp 1249Tq)
Transmission: 1000 rated T56 6 speed manual
Axle/Gears: 3.73 Posi & mini spool & 28 spline
GM Goodwrench 350ci / 260hp Engine
Specifications: 4 bolt main with 2 piece rear main seal
Cast iron crankshaft
LT1/LT4 powdered metal connecting rods
Cast pistons (dished)
Hydraulic flat tappet cam, (.383''/.401'') and a 112° lobe separation
Cast iron cylinder heads with 76cc chambers
8.5:1 compression ratio
Left hand dipstick
4 quart oil pan
8'' balancer
spark plug- Accel 111-574 with 14mm, .460'' reach, 5/8'' hex, tapered seat, projected tip
Specifications: 4 bolt main with 2 piece rear main seal
Cast iron crankshaft
LT1/LT4 powdered metal connecting rods
Cast pistons (dished)
Hydraulic flat tappet cam, (.383''/.401'') and a 112° lobe separation
Cast iron cylinder heads with 76cc chambers
8.5:1 compression ratio
Left hand dipstick
4 quart oil pan
8'' balancer
spark plug- Accel 111-574 with 14mm, .460'' reach, 5/8'' hex, tapered seat, projected tip
02-12-2007, 01:14 AM
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Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
That's pretty abysmal. That low CR will tolerate a fair bit of boost, except for the cast pistons and tight ring gaps.
I'd stop at about 9psi or so.
I'd stop at about 9psi or so.
02-12-2007, 07:00 AM
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Car: '85 TA
Engine: 350 turbo
Transmission: T56
Axle/Gears: 3.70 posi 9bolt
Everyone I talked to recommended against boosting that engine. That included Summit and engine shops. To do it right with that engine, you'd want to change the pistons/rings and the tiny cam too. But, by the time you change everything, you could've had a better engine built from the start.
02-12-2007, 12:48 PM
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Car: 1986 CHEVY CAMARO IROC-Z
Engine: Twin Turbo 383 (1190hp 1249Tq)
Transmission: 1000 rated T56 6 speed manual
Axle/Gears: 3.73 Posi & mini spool & 28 spline
i just wanted to find out but i have made my block already forged crank forged pistons nitrous hp cam and blow thru 750 carb, h-beam rods and the whole engine is arp bolted and the to4e twin turbo setup intercooled with 3 inch exhaust all the way back
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02-13-2007, 11:05 AM
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Car: 1986 CHEVY CAMARO IROC-Z
Engine: Twin Turbo 383 (1190hp 1249Tq)
Transmission: 1000 rated T56 6 speed manual
Axle/Gears: 3.73 Posi & mini spool & 28 spline
cause i want to know it does not hurt to ask does it!
02-13-2007, 05:54 PM
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Car: 89 TA
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 10 bolt 3.08
perhaps it's for future reference, it doesn't hurt to learn. better to ask than to bomb an engine. beside, 9 psi isn't bad at all if you're just looking to put a little kick in a daily driver, although I'd be a bit more conservative myself for an added durability factor
02-14-2007, 01:55 AM
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Car: 1986 CHEVY CAMARO IROC-Z
Engine: Twin Turbo 383 (1190hp 1249Tq)
Transmission: 1000 rated T56 6 speed manual
Axle/Gears: 3.73 Posi & mini spool & 28 spline
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