LS2 Chevelle: Cam Motion cam, ported 799s (GRAPH ADDED)
#1
LS2 Chevelle: Cam Motion cam, ported 799s (GRAPH ADDED)
LS2 stock shortblock 50k miles
799 heads, hand ported (306cfm@.600" on an oversized bore plate), milled .015"
GM ls2 MLS head gaskets
Cam Motion 230/238 .620"/.602" 113+3
1 3/4" Doug's swap long tubes
3" duals with Flowtech Terminator chambered mufflers no X or H
Fast 90mm mild port
25% UDP
built 4l60e
Yank SS3600 unlocked
3.5" chromoly steel driveshaft (56" long...heavy bastard)
12 bolt, eaton, 3.42 gears
17x9.5" wheels with 285/40r17 Nitto 555 street tires
Results:
418rwhp and 372 ft/lbs through the mufflers and unlocked converter
6.2% converter slip
The torque graph is super flat, from just over 4500rpm-6100rpm where I stopped the pull it never drops under 350 ft/lbs.
I'm running 27.5* timing and I have it tuned in 2nd gear to hit 12.8:1 afr but my wideband was on the fritz so I'm not sure what it's seeing in 3rd. It might be a slightly rich.
I know these aren't the high numbers most people post but I like to document everything. For reference the same car, same dyno, with an ls1 and mostly stock 799s and 230/238 EPS cam made 389rwhp and 345 rwtq. That setup went 11.67@115mph and 7.45@94mph 1/8th.
799 heads, hand ported (306cfm@.600" on an oversized bore plate), milled .015"
GM ls2 MLS head gaskets
Cam Motion 230/238 .620"/.602" 113+3
1 3/4" Doug's swap long tubes
3" duals with Flowtech Terminator chambered mufflers no X or H
Fast 90mm mild port
25% UDP
built 4l60e
Yank SS3600 unlocked
3.5" chromoly steel driveshaft (56" long...heavy bastard)
12 bolt, eaton, 3.42 gears
17x9.5" wheels with 285/40r17 Nitto 555 street tires
Results:
418rwhp and 372 ft/lbs through the mufflers and unlocked converter
6.2% converter slip
The torque graph is super flat, from just over 4500rpm-6100rpm where I stopped the pull it never drops under 350 ft/lbs.
I'm running 27.5* timing and I have it tuned in 2nd gear to hit 12.8:1 afr but my wideband was on the fritz so I'm not sure what it's seeing in 3rd. It might be a slightly rich.
I know these aren't the high numbers most people post but I like to document everything. For reference the same car, same dyno, with an ls1 and mostly stock 799s and 230/238 EPS cam made 389rwhp and 345 rwtq. That setup went 11.67@115mph and 7.45@94mph 1/8th.
Last edited by thunderstruck507; 06-05-2015 at 08:18 AM.
#2
Thanks for sharing.
#4
The dyno isn't an optimistic one
Through a stalled auto and a 12 bolt I think it's pretty stout
It picked up around 30 wheel hp from the ls1 it had before, and the torque curve is hilariously flat
Through a stalled auto and a 12 bolt I think it's pretty stout
It picked up around 30 wheel hp from the ls1 it had before, and the torque curve is hilariously flat
#5
I was curious but know enough to not worry about dyno numbers. This thing is so fun to drive and pulls insanely hard...I run 2nd gear out to 6800rpm and it is still not nosing over much (graph peaked at 6100 and I shut it down).
Not that I think 445-450rwhp locked is in any way "bad" for some hand ported 799s, mild cam, and the heavy *** drivetrain it's running through.
Last edited by thunderstruck507; 06-02-2015 at 08:32 AM.
#7
Just a reminder for everyone who thinks all heads/cam 6.0 are going to make 480-500 wheel hp. It's not a whole lot easier with 6.0 as it is with 5.7, but the torque gains through the power band are what's really valuable with the swap (and in my case 100k less miles on the shortblock).
I keep forgetting to bring the dyno sheet to work with me...
I keep forgetting to bring the dyno sheet to work with me...
Last edited by thunderstruck507; 06-03-2015 at 08:51 AM.
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#8
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Just a reminder for everyone who thinks all heads/cam 6.0 are going to make 480-500 wheel hp. It's not a whole lot easier with 6.0 as it is with 5.7, but the torque gains in through the band are what's really valuable with the swap (and in my case 100k less miles on the shortblock).
I keep forgetting to bring the dyno sheet to work with me...
I keep forgetting to bring the dyno sheet to work with me...
#11
I might be going friday but I only have street tires right now. Last year I cut a 1.88 60ft on them though (Nitto 555 285/40r17). Should get some ballpark trap speeds though. I'm hoping to see 120 is good air but think it should run 118 or so most nights due to poor DA (typically 1500-3000ft)
#12
Going to post track results here as they come in:
https://ls1tech.com/forums/drag-raci...l#post18836330
Not really pleased with it yet but hoping it will come around.
https://ls1tech.com/forums/drag-raci...l#post18836330
Not really pleased with it yet but hoping it will come around.
#16
EPS 230/238 113+2 peaked at 6200 in a ls1 combo, so it didn't strike me as odd this would peak a tad lower in a 6.0 with an extra degree of advance ground in.
It doesn't feel like it falls off much if at all on the street though...the car will pull hard to nearly 7000rpm. Just need to get it hooking at the track to figure out what it likes for shift points.
It doesn't feel like it falls off much if at all on the street though...the car will pull hard to nearly 7000rpm. Just need to get it hooking at the track to figure out what it likes for shift points.
#18
Finally got some solid track numbers. I logged a pass and the AFR was a steady 12.6-12.8 in 3rd and it was holding all 27.5* timing through the run. The car responded well to a drop in shift points. Previously had them set at 6800 and backed down to 6400, lost no MPH but gained ET. This cam in a 6.0 def likes to hold in the meat of the power band and not be rung out like it did in the ls1 which liked to shift at 6750rpms.
For those who can't see the pic it went 7.25@94 in the 1/8th and 11.46@116.7mph in the 1/4 in 800ft DA at a raceweight of about 3700lbs with me in it.
For those who can't see the pic it went 7.25@94 in the 1/8th and 11.46@116.7mph in the 1/4 in 800ft DA at a raceweight of about 3700lbs with me in it.
#19
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Good results! .21 & 1.7 MPH 6.0 vs 5.7.
I would bet a ported FAST LSXRT Intake & 1 7/8" LTS would add
.30 & 2.5+ MPH, even bigger longer torque plateau along with
Higher and longer HP Peak & carry 500 RPM Farther.
Add Cold Ram Air from grill ( or headlight openings like the old Ford
Thunderbolts! Easy 30+ HP the last 1/8 in a quarter. Probably
Another 2 MPH+ don't know if you Have 4 or 2 headlights) if you don't already have it. Just food for thought. You have a baddass ride as it
Is but like 99.9% of us on this site we always want more. LOL!
I would bet a ported FAST LSXRT Intake & 1 7/8" LTS would add
.30 & 2.5+ MPH, even bigger longer torque plateau along with
Higher and longer HP Peak & carry 500 RPM Farther.
Add Cold Ram Air from grill ( or headlight openings like the old Ford
Thunderbolts! Easy 30+ HP the last 1/8 in a quarter. Probably
Another 2 MPH+ don't know if you Have 4 or 2 headlights) if you don't already have it. Just food for thought. You have a baddass ride as it
Is but like 99.9% of us on this site we always want more. LOL!
#20
2 headlight car
Yeah, lots of little things I could do. At the end of the day I'm fairly happy now that it's at the cutoff for no roll bar.
The blue 2011 GT in the background went 12.23@114mph on street tires. Car has a tune and off road H pipe. 3.73 manual trans car.