Exhaust n' Horsepower!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69GMC910 · 12-29-2005, 01:24 AM

Hey everyone, Just replaced the stock exhaust on my 82'. I updated it with dual 2 1/4" and Flowmaster 50 series Delta Flows. Unfortunately, I'm an Idiot and forgot my headers when I went to get the exhaust done, 230 miles from home. Anyways, my question is, How much of a horsepower gain do you think my new stuff gave me? It feels like 25, but that could just be because it sounds so tough!

btw, It's a stock 350 with 305 heads, perf. intake perf cam and 1405 carb, accel cap rotor coil. I think these engines were rated at 185hp stock, correct me if I'm wrong, so with what I'm running I figure the truck feels like at least 230hp. Is this a good ballpark guess???

12-29-2005, 01:24 AM	#1
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Exhaust n' Horsepower!! Hey everyone, Just replaced the stock exhaust on my 82'. I updated it with dual 2 1/4" and Flowmaster 50 series Delta Flows. Unfortunately, I'm an Idiot and forgot my headers when I went to get the exhaust done, 230 miles from home. Anyways, my question is, How much of a horsepower gain do you think my new stuff gave me? It feels like 25, but that could just be because it sounds so tough! btw, It's a stock 350 with 305 heads, perf. intake perf cam and 1405 carb, accel cap rotor coil. I think these engines were rated at 185hp stock, correct me if I'm wrong, so with what I'm running I figure the truck feels like at least 230hp. Is this a good ballpark guess??? __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph



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