5.3 Performance
04-17-2011, 11:25 AM
#1
Staging Lane
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5.3 Performance I just took my 5.3/t56 swapped Iroc to the dyno (dynojet machine) to get a baseline for hp and torque before I do a cam and intake swap, the car made 270 rwhp/311 ft/ lbs. of torque. It's currently a stock 5.3 from an 06 Z71 with an 01 LS1 intake and injectors, and I have stainless works longtube headers with 1-3/4" primaries and 3" collectors, and for exhaust I am running a 3" y-pipe going straight into a flowmaster 10 series race muffler dumped before the axle.
I plan on installing the #54-600-11 Comp Cams Thumpr cam ,UD pulley. 90mm throttle body and a FAST 90mm intake I just bought pretty soon. I'm wondering, should I replace the fuel injectors to larger ones? Will I see a noticable gain? what injectors would you recommend for a 5.3 with a FAST 90 intake and 90mm TB?
Thanks, Dan
I plan on installing the #54-600-11 Comp Cams Thumpr cam ,UD pulley. 90mm throttle body and a FAST 90mm intake I just bought pretty soon. I'm wondering, should I replace the fuel injectors to larger ones? Will I see a noticable gain? what injectors would you recommend for a 5.3 with a FAST 90 intake and 90mm TB?
Thanks, Dan
04-17-2011, 01:43 PM
#2
consider looking at a comp LSr cam.I feel a little better lobe .down load compcam quest and plug in different cams.54-408-11 and 54-455-11 will make more power the 54-600-11.get some 36# for room to grow down the road.
Last edited by garygnu; 04-17-2011 at 01:56 PM.
04-17-2011, 02:39 PM
#3
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yeah i would not go with the thumpr cam. if anything have one custom spec'd for you.
also you should give me that FAST set up. that 5.3 doesn't need that kind of intake.
also you should give me that FAST set up. that 5.3 doesn't need that kind of intake.
04-17-2011, 03:15 PM
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Thanks for the replies, I got the FAST 90 intake used dirt cheap$$ So i'm going to try it out on the 5.3, i'm hoping to run across a good deal on an LQ4/LQ9 and throw it in, then I can just take the 5.3 and stick it in the malibu. Just curious, what's wrong with the thumpr cam? I saw in a car craft article that the 5.3 made 96hp just from the thumpr cam and it had me sold!
Thanks, Dan
Thanks, Dan
04-17-2011, 03:53 PM
#5
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Thanks for the replies, I got the FAST 90 intake used dirt cheap$$ So i'm going to try it out on the 5.3, i'm hoping to run across a good deal on an LQ4/LQ9 and throw it in, then I can just take the 5.3 and stick it in the malibu. Just curious, what's wrong with the thumpr cam? I saw in a car craft article that the 5.3 made 96hp just from the thumpr cam and it had me sold!
Thanks, Dan
Thanks, Dan
that's fine for a stock truck motor or a stock everything ls1, but with that fast 90 + headers i would try to use a little more overall duration and lift. i would go with a TSP 220/220, 224r, or something along the lines of a 222/224 .581/.581 XER. you will get a nice torque curve and the hp will be nothing to laugh at either.
