What would i gain and loose by switching cams... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lukecp · 05-01-2002, 02:39 PM

Right now i have a Blue Racer (made by Crane) cam in my truck. The specs are:

Intake/Exhaust duration @.050 lift:204/214 Adv. Duration: 270 280
Cam lift: 280 .295
Valve Lift:.420 .443
Lobe Centerline: 107 117

The cam has alot of tourqe in the 1500-3200 RPM range, but around 4200 RPM it really starts to run out of steam. My engine is a fresh 350, stock heads, Edelbrock Performer intake and carb, HEI, and headers. I was thinking of switching to a Comp 268H cam.

Its specs are:
Gross Valve Lift: .454 .454
Duration At 0.006 Tappet Lift: 268 268
Duration At 0.05: 218 218
Lobe Separation: 110

Would the cam switch gain me any power, or give me a unnoticable amount of power, and worse MPG? The truck is used as a daily driver, and mileage is importaint.

------------------
Lucas

"Another proud owner of one of the coolest trucks ever built"

drop_shift@hotmail.com

My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, roughly 300 HP thanks to a mild cam, Edelbrock intake and carb, headers, and 40 seires Flowmaster mufflers. Ochre with a white top. Plans as of now include a bigger cam, lower gears, and lots of body work.

kaycee · 05-01-2002, 08:56 PM

I am running a 268 cam and really like the way it performs.Good all around cam in my book,great for the cruiser and street,plus it has some good torque for pulling a trailer.I can pretty much bury the speedo with no problem.I have been getting 11 mpg our motors are pretty close to the same I have 350/350 with 373 gears.Hope this helps a little

------------------
97 TAHOE
70 CHEVY LWB 350/350
69 CHEVY Short/Step
67 GMC LWB
63 IMPALA 327/PG

lukecp · 05-01-2002, 09:11 PM

Ok, but how much power would i acutally gain by switching cams? The truck isn't gutless at all right now, it just dosen't have as much power in the high RPM's as i would like it to have. But, i have 3.07 gears, and my crusing RPM is around 2000-2700.

------------------
Lucas

"Another proud owner of one of the coolest trucks ever built"

drop_shift@hotmail.com

My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, roughly 300 HP thanks to a mild cam, Edelbrock intake and carb, headers, and 40 seires Flowmaster mufflers. Ochre with a white top. Plans as of now include a bigger cam, lower gears, and lots of body work.

05-01-2002, 02:39 PM	#1
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	What would i gain and loose by switching cams... Right now i have a Blue Racer (made by Crane) cam in my truck. The specs are: Intake/Exhaust duration @.050 lift:204/214 Adv. Duration: 270 280 Cam lift: 280 .295 Valve Lift:.420 .443 Lobe Centerline: 107 117 The cam has alot of tourqe in the 1500-3200 RPM range, but around 4200 RPM it really starts to run out of steam. My engine is a fresh 350, stock heads, Edelbrock Performer intake and carb, HEI, and headers. I was thinking of switching to a Comp 268H cam. Its specs are: Gross Valve Lift: .454 .454 Duration At 0.006 Tappet Lift: 268 268 Duration At 0.05: 218 218 Lobe Separation: 110 Would the cam switch gain me any power, or give me a unnoticable amount of power, and worse MPG? The truck is used as a daily driver, and mileage is importaint. ------------------ Lucas "Another proud owner of one of the coolest trucks ever built" drop_shift@hotmail.com My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, roughly 300 HP thanks to a mild cam, Edelbrock intake and carb, headers, and 40 seires Flowmaster mufflers. Ochre with a white top. Plans as of now include a bigger cam, lower gears, and lots of body work. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

05-01-2002, 08:56 PM	#2
kaycee Registered User Join Date: Jan 2000 Location: Wyoming USA Posts: 2,445	I am running a 268 cam and really like the way it performs.Good all around cam in my book,great for the cruiser and street,plus it has some good torque for pulling a trailer.I can pretty much bury the speedo with no problem.I have been getting 11 mpg our motors are pretty close to the same I have 350/350 with 373 gears.Hope this helps a little ------------------ 97 TAHOE 70 CHEVY LWB 350/350 69 CHEVY Short/Step 67 GMC LWB 63 IMPALA 327/PG __________________ 2001 Silverado K-1500 2005 FXDWG stage3 69 CHEVY Short/Step 327/4L60 373 posi 63 IMPALA 327

05-01-2002, 09:11 PM	#3
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	Ok, but how much power would i acutally gain by switching cams? The truck isn't gutless at all right now, it just dosen't have as much power in the high RPM's as i would like it to have. But, i have 3.07 gears, and my crusing RPM is around 2000-2700. ------------------ Lucas "Another proud owner of one of the coolest trucks ever built" drop_shift@hotmail.com My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, roughly 300 HP thanks to a mild cam, Edelbrock intake and carb, headers, and 40 seires Flowmaster mufflers. Ochre with a white top. Plans as of now include a bigger cam, lower gears, and lots of body work. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg



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