Thread: Exhaust size
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Old 04-03-2020, 12:11 PM
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Lee Lee is offline
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Join Date: Dec 1999
Location: Crosby, TX (East of Houston)/Texas/USA
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Quote:
Originally Posted by 64speed View Post
How will this affect my low end torque/driveability? I have Dougs headers with 3.5 inch collectors Edelbrock round port heads ported to 315 CFM. Holley Sniper fuel injection with timing control. Cant remember my cam specs right now but Paul Carter specd it. 1.7 BBC roller rockers. Torker II intake with one inch spacer.
With stock iron "66" heads, 8.4 compression 3.08 gears, stock torque converter, a FAST XFI Sportsman throttlebody efi system with timing control, and my 3" exhaust system, my tires will spin at 1/4 throttle. Cruises great at low-rpm, never lugs.

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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'.

'67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust

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