cam tuning suggestions?

[George C]

since when did GenIII 4.8 come with 285?
o btw your so called chip didnt give you 40, you didnt gain 25 from exhaust, not 35 from a diablo or 18 from a cai. all together you might of gained 25-35 from all those listed

also 410s may not be enough for your setup

no way - truck came stock with 285 hp, and even if the part manufactorers claims WERE true ](18hp on a CAI? i dont think so but lets entertain this idea for a sec) that would put me at +18hp for the CAI, +40hp for the SLR motorsports chip, +25hp for custom exhaust work, +35hp from diablo tuner, that would be 403hp. Now we all know this IS NOWHERE NEAR THE TRUTH.... but your telling me i'm only putting down 200rwhp from a truck with those mods that came from factory with 285hp? (and we all know GM is notorious for lying about their true HP numbers). Even with the 4l60e trans and stock 3.23 gears the loss from flywheel to pavement isnt that great. i havent met a f-150, titan, tundra or hemi ram i havent smoked yet.
Dont be one of those "newbie bashers"....

Kyhunter89 - ty - i will look them up - Bowling Green isnt too far a drive - i cud make a day of it.

oh and btw $ wasnt right for 4.10s this paycheck, since i dont have the tools to install them myself and wud hafta pay for installation, but it was right for a set of headers! shud have em in a week

[demonheavymetal]

Remember I said those were manufacter claims which we all kno are exaggerrated to all hell. 06gmc 4.8 was listed at 285hp, even on my window sticker, and also on various sites like autotrader, kelly blue book, etc... Y 4.10s not b enough? U suggessting 4.55s? Im looking for harder faster launches but still decent driveability. My motor is technically an LR4, iron block with aluminum heads, but its really just an iron block LS genIII. Also has 12 degrees of valve dwell time, which means it will respond better to boost then other LS designs, future does include a maggie or mb a turbo, but I want to see how much NA horsies I can squeeze outta this tuff lik motor

[George C]

wtf you smoking dude, LR4 are 270 hp and 285 torque the 5.3 LM7 was 285 and 325 torque. the heads on the 4.8 are same as the 5.3s all the LS motors love boost

Remember I said those were manufacter claims which we all kno are exaggerrated to all hell. 06gmc 4.8 was listed at 285hp, even on my window sticker, and also on various sites like autotrader, kelly blue book, etc... Y 4.10s not b enough? U suggessting 4.55s? Im looking for harder faster launches but still decent driveability. My motor is technically an LR4, iron block with aluminum heads, but its really just an iron block LS genIII. Also has 12 degrees of valve dwell time, which means it will respond better to boost then other LS designs, future does include a maggie or mb a turbo, but I want to see how much NA horsies I can squeeze outta this tuff lik motor

[kerrige]

If im not mistaken the diablo tuner allows custom tuners to email you a tune that can be loaded into your truck directly.... just saying also think the slr chip is prolly less effective than a normal custom tune.

I think 4.10's would be a good choice unless you are going with a tall tire.

Remember these boys on this site aren't new to the LS truck game some may have enough knowledge to slap you silly
PS quik here had one of the fastest 4.8 turbo trucks ever if i am not mistaken so don't bag on him too hard guy knows his shiz even if he is a grinch at times haha

[demonheavymetal]

If im not mistaken the diablo tuner allows custom tuners to email you a tune that can be loaded into your truck directly.... just saying also think the slr chip is prolly less effective than a normal custom tune.



I think 4.10's would be a good choice unless you are going with a tall tire.

Remember these boys on this site aren't new to the LS truck game some may have enough knowledge to slap you silly
PS quik here had one of the fastest 4.8 turbo trucks ever if i am not mistaken so don't bag on him too hard guy knows his shiz even if he is a grinch at times haha

Im currently running a 275\60\17 tire. Factory rims. I thought 4.10s would b a good all around choice.

[Botlfed]

ok ok with the mods you may get 225-230 rwhp, get it dynoed as it sits and report back, ive dynoed my truck thru its whole life i know what stock numbers are and modded numbers, on my supposed factory freak 5.3 i dynoed stock 259 rwhp, came with a corsa cat back, and a few other nick nacks, there is a huge difference in engine HPs and RWHPs.

[DamnYankee]

Pacesetter headers have arrived! Picked up some gaskets today and installing tomorrow! (pacesetter sent paper gaskets....really? Who in the world would use that crap?)

...that being said, there's no reason to buy new gaskets. Just use your stock ones unless something is wrong with them.

[pl4yboy]

Stock ones are better than any others I've seen. Never could get another kind to seal.

[farmtruc]

What's a dyno? Never put my truck on one. At least with this engine.

Ur truck is probably producing around 250hp to the wheels on a cold day. Heat soak can really screw hp readings. The iat vs timing table is aggressive.

Ull also loose a few hp with steeper gears but gain a lot of acceleration.

Keep us updated!

[demonheavymetal]

Well after much fussin n cussin removing the old exhaust manifolds, the pacesetters slid right in. I uaed new felpro gaskets, no leaks, only costs $13 @ autozone. amazingly it wasnt the header bolts that gave me problems, it was the nuts on the ypipe flanges. Just took some pentrating oil and a lot of elbow grease. Now to go burn off the rest of that black paint.....