4.8L cam - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**LEEVON** · 06-19-2009, 12:26 AM

Bought a cam for my '08 with the 4.8L today. I have gotten really bored with it's performance and find it to be all around slow so it's time to start modding.

Cam specs are 212/218 .522/.529 on 114 LSA I believe. It's Comp Cams XR265, a proven cam great for daily drivers. It's small but I'm not really looking for big numbers, just a little more HP and torque across the curve.

Right now I'm collecting parts for the swap, once it's in I'll get a tune then move on to supporting mods such as a mild converter, long tube headers, intake, gear swap and such.

Anybody have experience with a cammed 4.8L?

jgreene0717 · 06-19-2009, 11:09 PM

I dont have any experience with the4.8. But I installed a superchips flashpaq and a magnaflow exhaust on my 5.3 and it runs great. I purchased a s&b cold air kit also but sent it back due to losing some low end torque. I love my 07 so far how do you like your 08.

**LEEVON** · 06-20-2009, 07:30 PM

Good to know about the S&B, I'm looking for an intake and this was at the top of the list. I assume that a live tune would make the most out of one though.

I love the truck. Some folks are very opinionated about GMT 900's but I like em just fine. I love the new interior, I am a large guy and the seats and everything just seem to fit me well. Rack and pinion steering also scores points in my book as well as the e-fans and full stainless exhaust.

My only gripes are with the DJM drop kit but that's my fault (or DJM?)

I had an '02 with 5.3L it had K&N 77 series intake, headers, IMCO exhaust, Wait4me tune and it ran great. I want to take it to the next level with this one though.

What model is your '07?

jgreene0717 · 06-22-2009, 07:42 PM

Mine is a new body 2007 rcsb with the LT package. It is as loaded you can get for a regular cab. I ran it at the local track with the stock intake verses the s&b and the 60 foot time would slow down as well as the 1/8 mile time. The 1/4 mile time stayed about the same. It probably helped in the horsepower department but it just killed the power off idle. I just run it with stock intake with a drop in K&N filter.

06-19-2009, 12:26 AM	#1
LEEVON Registered User Join Date: Jul 2006 Location: Ozark, MO Posts: 4,887	4.8L cam Bought a cam for my '08 with the 4.8L today. I have gotten really bored with it's performance and find it to be all around slow so it's time to start modding. Cam specs are 212/218 .522/.529 on 114 LSA I believe. It's Comp Cams XR265, a proven cam great for daily drivers. It's small but I'm not really looking for big numbers, just a little more HP and torque across the curve. Right now I'm collecting parts for the swap, once it's in I'll get a tune then move on to supporting mods such as a mild converter, long tube headers, intake, gear swap and such. Anybody have experience with a cammed 4.8L? __________________ '20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids

06-19-2009, 11:09 PM	#2
jgreene0717 Jason Join Date: Sep 2008 Location: Wetumpka, AL Posts: 152	Re: 4.8L cam I dont have any experience with the4.8. But I installed a superchips flashpaq and a magnaflow exhaust on my 5.3 and it runs great. I purchased a s&b cold air kit also but sent it back due to losing some low end torque. I love my 07 so far how do you like your 08.

06-20-2009, 07:30 PM	#3
LEEVON Registered User Join Date: Jul 2006 Location: Ozark, MO Posts: 4,887	Re: 4.8L cam Good to know about the S&B, I'm looking for an intake and this was at the top of the list. I assume that a live tune would make the most out of one though. I love the truck. Some folks are very opinionated about GMT 900's but I like em just fine. I love the new interior, I am a large guy and the seats and everything just seem to fit me well. Rack and pinion steering also scores points in my book as well as the e-fans and full stainless exhaust. My only gripes are with the DJM drop kit but that's my fault (or DJM?) I had an '02 with 5.3L it had K&N 77 series intake, headers, IMCO exhaust, Wait4me tune and it ran great. I want to take it to the next level with this one though. What model is your '07? __________________ '20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids

06-22-2009, 07:42 PM	#4
jgreene0717 Jason Join Date: Sep 2008 Location: Wetumpka, AL Posts: 152	Re: 4.8L cam Mine is a new body 2007 rcsb with the LT package. It is as loaded you can get for a regular cab. I ran it at the local track with the stock intake verses the s&b and the 60 foot time would slow down as well as the 1/8 mile time. The 1/4 mile time stayed about the same. It probably helped in the horsepower department but it just killed the power off idle. I just run it with stock intake with a drop in K&N filter.



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