Stock LQ4 cam, any performance data?
Stock LQ4 cam, any performance data? Do any of you have dyno or track data for any LQ4 turbo setups using the stock LQ4 cam? I am finishing up my LQ4 with an S400 T4 1.10 and am going to use the stock cam at first before deciding on what cam to get. Just curious to see what others have gotten with the stock cam. Thanks
It is $265 for the cam + springs + longer pushrods, so around $450 right? I have been looking for one of these mythical cheap ebay special pullout cams for $150 or whatever and I never see one.
Any idea on the guy who went from 10.5 to 9.9, is that all he changed? The S400 is borg warners medium sized cheaper turbo, mine is a 75mm. Here are some examples of them http://www.forcedinductions.com/productsborgwarner.htm
Any idea on the guy who went from 10.5 to 9.9, is that all he changed? The S400 is borg warners medium sized cheaper turbo, mine is a 75mm. Here are some examples of them http://www.forcedinductions.com/productsborgwarner.htm
Factory camshaft part numbers
The 99-00 LQ4 6.0L used the 12560967 - this is also used in the 5.3L
The 01-up LQ4 6.0L used the 12561721
The 02-up LQ9 6.0L also used the 12561721
Factory Camshaft specs are:
12560967 191/190 duration at .050 0.457/0.466 lift on a 114 Lobe center
12561721 196/207 duration at .050 0.467/0.479 lift on a 116 Lobe center
The 99-00 LQ4 6.0L used the 12560967 - this is also used in the 5.3L
The 01-up LQ4 6.0L used the 12561721
The 02-up LQ9 6.0L also used the 12561721
Factory Camshaft specs are:
12560967 191/190 duration at .050 0.457/0.466 lift on a 114 Lobe center
12561721 196/207 duration at .050 0.467/0.479 lift on a 116 Lobe center
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In my experience on my LQ4 JY set up, the car ran out of steam at 5500 with the stock cam. I swapped in a cam similar to the LS6, and dropped .1-.2 in the 1/4 and picked up a MPH or so everywhere. The car now pulls strong to 6200 easily.
Stock cam dyno, no dyno with the new cam, I think the low pull was on 10lbs, and the high pull is on ~15
Stock cam dyno, no dyno with the new cam, I think the low pull was on 10lbs, and the high pull is on ~15
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Verdad Gallardo Thanks for the info and dyno graph, those are some great results on a stock cam. Im suprised it doesnt make quite a bit more torque than horsepower like the stock engine does. This LQ4 and S400 of mine is replacing a 4.3 V6 and same S400 in a 3200# car that went 132mph in the 1/4 mile on 16#, so Im hoping this LQ4 will be able to do the same with the stock cam and 14-16#.
Thanks everyone for the responses.
Thanks everyone for the responses.
The stock cam works pretty damn good, Ive been driving it around on 4-5psi and it runs as good as the previous V6 setup on 10# that ran 123mph so this at 15-20psi should be 135mph+. I'll find out next Friday and post back.
http://www.youtube.com/watch?v=noQPzOAIzXI
http://www.youtube.com/watch?v=noQPzOAIzXI
I am going to try to finally get to the track this next weekend. For a cheapo stock setup, an LQ4 and 10# is pretty awesome torque for the street. This turbo is making boost right off idle, Ive got a faster turbo big block but this one is more fun with the instant power.
Mediocre results tonight at 10# boost.
Setup is stock LQ4, MSD 6010, 3.31 gears, th350, 26" tires, GMPP carb intake, 750 carb and S400SX T4 1.10ar. Ran 50% pump gas and 50% methanol.
For some reason I accidently left the limiter on the 6010 at 5200rpm and was on it half way between the 1/8 marker and 1/4 marker. I was all over the limiter in every gear like a dog on a cat turd.
2.15 60'
102mph 1/8th
122mph 1/4
11.65
It should go 128-130 with the limiter moved to 6000rpm, Im going to try to go back out on Sunday and see what happens.
Here is the video
http://www.youtube.com/watch?v=9EbcF6nYos8
Setup is stock LQ4, MSD 6010, 3.31 gears, th350, 26" tires, GMPP carb intake, 750 carb and S400SX T4 1.10ar. Ran 50% pump gas and 50% methanol.
For some reason I accidently left the limiter on the 6010 at 5200rpm and was on it half way between the 1/8 marker and 1/4 marker. I was all over the limiter in every gear like a dog on a cat turd.
2.15 60'
102mph 1/8th
122mph 1/4
11.65
It should go 128-130 with the limiter moved to 6000rpm, Im going to try to go back out on Sunday and see what happens.
Here is the video
http://www.youtube.com/watch?v=9EbcF6nYos8
Last edited by Hank Peabody; Oct 29, 2010 at 09:49 PM.
Yeah stock springs, heads, the long block is 100% stock.
EDIT TWO DAYS LATER: I just remembered I put the cheap ARP rod bolts in when I replaced the piston I broke originally while running twice the timing that was safe (32 degrees
)
EDIT TWO DAYS LATER: I just remembered I put the cheap ARP rod bolts in when I replaced the piston I broke originally while running twice the timing that was safe (32 degrees
) Last edited by Hank Peabody; Oct 31, 2010 at 10:27 PM.
I moved the rev limiter up and it went about 6000rpm through the traps and didnt lose power or float the valves. Wound up going 10.8 @ 136.5 mph starting at 10psi and creeping up to 14psi at the end.
2.00 60'
108mph 1/8th 7.23
136.5mph 1/4
10.81
http://www.youtube.com/watch?v=Bjj8FImN3mE
2.00 60'
108mph 1/8th 7.23
136.5mph 1/4
10.81
http://www.youtube.com/watch?v=Bjj8FImN3mE
Last edited by Hank Peabody; Oct 31, 2010 at 02:55 PM.