Duplicating the 350 HO crate - The 1947 - Present Chevrolet & GMC Truck Message Board Network

crm318 · 09-17-2012, 10:06 AM

The other day, I was reading an old Car Craft magazine and they were dyno testing a 350 vortec HO (330hp). With headers and 2.25 exhaust, they made 341 hp @ 5400 and 383 tq @ 4000. I got to thinking, I have a similar set up in my truck. I have a vortec 350 (.040). The only differences are that I have the 268H Comp Cam .454/.454 218/218, a GMPP high rise intake with 3/4" spreadbore adaptor and a quadrajet with .73 jets. I also have longtube headers with 2.25 exhaust. Is it a safe bet that my engine is making similar power to the Vortec HO?

09-17-2012, 10:06 AM	#1
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	Duplicating the 350 HO crate The other day, I was reading an old Car Craft magazine and they were dyno testing a 350 vortec HO (330hp). With headers and 2.25 exhaust, they made 341 hp @ 5400 and 383 tq @ 4000. I got to thinking, I have a similar set up in my truck. I have a vortec 350 (.040). The only differences are that I have the 268H Comp Cam .454/.454 218/218, a GMPP high rise intake with 3/4" spreadbore adaptor and a quadrajet with .73 jets. I also have longtube headers with 2.25 exhaust. Is it a safe bet that my engine is making similar power to the Vortec HO? __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies



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