500 rwhp 5.3l

[mrbomb1]

22" tires???

[1989K1500]

That sounds really low for a supercharged 5.3.

Originally Posted by mrbomb1

22" tires???

22" rims

[91_bowtie]

Originally Posted by 1989K1500

That sounds really low for a supercharged 5.3.


22" rims

but, you can't plan on making power if you just bolt it on and go. If it's on an otherwise bone stock truck, then it sounds about right. I made close to 500 with my non-intercooled whipple, on a tiny cam only 5.3 though. It's all in the right combo.

[2500ak]

Not being able to get the tires to break loose is probably in the tune. My guess is that they left in most of the torque management to keep the extra power from snapping the trans. If you put in a good shift kit, like the transgo reprogramming kit, you should be able to delete most of it without a lot of the risk of breaking things, just make sure they keep the line pressure stock.

The problem of power is most likely the cam, or not enough fuel, or both. The stock fuel pump might not be enough to feed the engine efficiently any more, and the stock cam is crap.

The stock cam has a wide LSA and low durations for emissions purposes and will greatly hinder the engine making much more power than it does stock.

Remember, with boost you want wide LSA and high durations with a good exhaust bias. The GT2-3, TR blower, "TR old man truck cam", and may others all fit the build.

If that doesn't work get a smaller pulley for the blower if they make one.

[1989K1500]

Originally Posted by 91_bowtie

but, you can't plan on making power if you just bolt it on and go. If it's on an otherwise bone stock truck, then it sounds about right. I made close to 500 with my non-intercooled whipple, on a tiny cam only 5.3 though. It's all in the right combo.

Even a tune and the procharger should make more than hes making though shouldnt it?

[bordenhard]

Ya I meant 22 wheels, its got the inline aftermarket fuel pump, hp connection in lacey,wa. Tuned it, its runnin 8 lbs of boost and its a completely stock motor and tranny...

[91_bowtie]

Originally Posted by 1989K1500

Even a tune and the procharger should make more than hes making though shouldnt it?

yeah... I would expect more, especially on 8 pounds. I'd like to see what it'd put down with a stock tire though.

[bordenhard]

ya thats what the owner of the shop told me too, he said with the stockers on, it probably would of pushed 340 to the tires, I would like to look into puttin a different cam in it, retuning it and doin the transgo setup... also another thing to think about, a buddy of mine has a full 6.0 liter motor out of a chev truck and he said he wants a grand for it, then I could slowly build it to maybe handle 12 lbs, what do you guys think

[bordenhard]

quick q for everyone, Im really confused about all the LS motor types, what was the ls1 in and ls2 in and ls3 in and so on...
isnt a LS2 going in the new camaro, and the TBSS has a LS2 as well...

[LiftedWhite94]

Originally Posted by bordenhard

quick q for everyone, Im really confused about all the LS motor types, what was the ls1 in and ls2 in and ls3 in and so on...
isnt a LS2 going in the new camaro, and the TBSS has a LS2 as well...

ls2 - 6.0 in the GTOs ls1 is in trans ams, camaro's, vettes ls3 is in the new vettes i think its 6.2 liter, ls7 is in the new Z06's its a 7.0 liter the ls6 is pretty much just a stronger ls1 I think they came in the older z06's or maybe they was just a create replacement not real sure

Here you go, knock yourself out lots of good info in here
http://en.wikipedia.org/wiki/GM_LS_engine#LS3

[1989K1500]

Originally Posted by LiftedWhite94

ls2 - 6.0 in the GTOs ls1 is in trans ams, camaro's, vettes ls3 is in the new vettes i think its 6.2 liter, ls7 is in the new Z06's its a 7.0 liter the ls6 is pretty much just a stronger ls1 I think they came in the older z06's or maybe they was just a create replacement not real sure

Here you go, knock yourself out lots of good info in here
http://en.wikipedia.org/wiki/GM_LS_engine#LS3

ls2 is in the 05-06(or is it 07 ) vette, the 05-06 gto, the tbss', the G8 GTs, Not sure what year but Caddy CTS-Vs.
ls3 is in 07 or 08 and newer vettes.
ls1 was in 97-04 vettes, 98-02 F bodies(trans am, camaro), 04 gtos.
LS6 was in the C5(97-04) Z06.
The C6(05+) Z06s get the ls7.

I could be missing some cars there but thats the jist of it.

[1989K1500]

Originally Posted by bordenhard

ya thats what the owner of the shop told me too, he said with the stockers on, it probably would of pushed 340 to the tires, I would like to look into puttin a different cam in it, retuning it and doin the transgo setup... also another thing to think about, a buddy of mine has a full 6.0 liter motor out of a chev truck and he said he wants a grand for it, then I could slowly build it to maybe handle 12 lbs, what do you guys think

Still 340 seems low to me. My cam/heads 6.0 liter made 352 to the tires in mine, 2nd gear, tc unlocked, little 17s and toyos.

I dont know much about Prochargers but with a good tune you should be fine with 12lbs on a stock motor. What people consider the limit on boost or power for these motors is different from person to person. Ask on here and you will be told by many that a stock gen III crank cant handle more than 500hp, other people are making 900+ with stock bottom ends.

A friend of mine has an 05 gto with a junkyard lq9 in it, never had the heads off, just put dual valve springs in it. He has a spot on tune, runs 110 octane and sprays straight meth and runs 23+ lbs of boost with his turbo setup. At 19lbs it made 825hp to the tires. Its completely streetable, drives to the track and runs 10s while slipping the clutch.

[Quicksilverado]

Originally Posted by 949c1

I'm looking to make 500rwhp with a 5.3l. what i'm looking at doing is a twin turbo setup (10lbs of boost). What kind of cam and valvetrain should i get to reach this point?

I put down 500 rwhp at 8 psi about 4 years ago with a STS kit. Stock 5.3, stock cam, 918 springs were the only upgrade to the engine. Ran a s/c from 40k-120k. Switched to t/c at 120k and it lasted to 190k. Don't waste your money on a cam if all you are looking for is 500 rwhp. You will need a well built tranny, the stock one will not last long. Whoever said the crank will not last is dead wrong. Tons of guys in the 800-1000 rwhp range with stock cranks. The 5.3, 5.7 and 6.0 are the same except for balancing for their respective rotating assemblies.

[Tristan]

Originally Posted by 2500ak

Well, other than the turbo itself, the cam is the most pivotal component in the setup assuming that the supporting components are strong enough to withstand the increased strain.


With the stock cam 500rwhp isn't going to work well, if at all. The stock GenIII cams were designed with one thing in mind, emissions. 190/191 on a 114 LSA.

The low durations will make it incapable of flowing anywhere near the engines potential.

But you don't want a hotcam either. Excessive overlap will bleed off boost compression and waste precious boost, not to mention the gas that'll get scavenged out with it.

Keep the overlap in check with wide LSA. A wide lobe sep will lower mid range compression on a N/A engine but in a boosted setup there's no reason not to keep it nice and wide. S/C cams tend to go from 114 and max out at about 118.5 LSA, but with a turbo 121 - 131 LSA is sometimes preferable.

You'll need more intake duration to let the higher volume air and fuel fill the chambers, but much more importantly you need a good exhaust bias to get the burnt stuff out of there. At the very least keep it around 8 degrees, which is a good number but you can go higher within reason.

Probably a good idea to keep the the intake duration within the 22x range and the exhaust duration below the low 23x.


Really high lift won't do a lot, but it'll add stress. The lm7 heads reach peak flow at .550/.550 not much reason to go higher than that.

The CheaTR cam from tr is a good example
214/230 with a 117 LSA


Lingelfelter really leads the pack when it comes to turbocharged GenIII's


For S/C the GT2-3 is a classic
207 / 220 with a 118.5 LSA

But with a turbo, I'd be more inclined to think a grind like the GT7 would work better
208 / 230 on a 121 LSA


Make sure you remove weak spots in the engine. Upgrade the timing chain to the heavy duty one, get springs that can handle the lift and then some. All the usual weak links.

This kid has the right idea.

I'd look at a cyntrifical supercharger kit like the Procharger D1, and go with a 119/119 mirror spec Linenfelter cam, or somthing a little heavier like a 127/129 LSA.

Have some head work done, and match those springs up and you'd have yourself a nice flowing motor there.