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-   -   Heads, New Cam, and Intake install on my 4.8 (https://www.performancetrucks.net/forums/gm-engine-exhaust-performance-21/heads-new-cam-intake-install-my-4-8-a-437117/)

BlackGMC Mar 15, 2009 07:41 PM

Heads, New Cam, and Intake install on my 4.8
 
7 Attachment(s)
Well i have had some parts laying around for a few months and I finally decided to start install them and get some results... I wanna see just how fast the 4.8 can go... I want to see 12's... My fiance is out of town this week so hopefully i should have the heads on and retuned by this weekend :)...

My fastest time at the track is 8.58 @ 81mph (1/8th)... I plan on installing each part then go to the track to see what results come from them, maybe the dyno (that is a big maybe)... I don't care about dyno numbers, i am more interested in track times

So the parts are:
First - PRC stage 2.5 heads, milled down to 58cc, Dual spring and Ti retainers. I will be installing them with a .04 head gasket.
Second - Custom Cam from Ed Curtis @ FTI specs unknown
Third - NNBS 90mm (actually 87mm) intake and DrX harness...


So now for the pics.

Today's Progress.. All this only took about 1.5 hours, previously i had reran all the wires on my motor which makes removing the intake super easy, only like 10min... Hopefully this time i can get the wiring covering back on :bang:

Attachment 140711

PRC heads

Attachment 140712

Attachment 140713


Now a side by side pic of the new 90mm intake versus the 78mm intake. You may not be able to tell but the runners are alot longer, the intake itself is a lot bigger... From what i have read, longer runners promote more TQ... Well we will find out...

Attachment 140714

Attachment 140715

Attachment 140716

Attachment 140717:barf:

neilownz Mar 15, 2009 07:45 PM

isnt 90 a little overkill on a 4.8? looks nice though.

BlackGMC Mar 15, 2009 07:52 PM


Originally Posted by neilownz (Post 4156529)
isnt 90 a little overkill on a 4.8? looks nice though.

The NNBS 4.8s come from the factory with a 90mm

Chris05 Mar 15, 2009 07:54 PM

Nice, I'm looking forward to your feedback with this swap. I just barely got my tuning problems taken care of. LOL I kinda wish I went bigger with the cam...

sonoma43 Mar 15, 2009 08:06 PM

interested in the outcome...keep us posted

Pewter53 Mar 15, 2009 08:43 PM

you will love the tbss intake it was night and day over my stock one but i've got more cubes but think it will help you out too should be a badass 4.8 you got going there.

dirt track racer 81 Mar 15, 2009 08:52 PM

I think you ought to sand and paint that intake. i think it would look pretty sweet

charcold-bowtie Mar 15, 2009 09:11 PM

hey thats my intake lol. Looks like fun corey.

BlackGMC Mar 15, 2009 09:16 PM

Thanks colton, yep i decided to install my crap instead of selling it...

charcold-bowtie Mar 15, 2009 09:19 PM

Yeah i saw it in your cam thread. I dont blame you, maybe it will give you some more motivation as well as results. Im interested in the intake results.


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