Summit ls turbo cams?
10-17-2019 | 07:11 PM
#61
GatTagO is correct. The Ghost cam p/n SUM-8715 is the Pro LS Stage 1 turbo cam. It works excellent as a sleeper cam as well, so we've put in in the N/A section as Stage 1 as well. Specs of the Ghost are 222/233 115 + 3 .600/.575. The valve events are -1 I/O, 43 I/Cm 55 E/O, -2 E/C for net -3 overlap. The Stage 2 N/A cam is part number SUM-8707. Specs are 226/238 113 + 33 .600/.600. The valve events are -3 I/O, 43 I/C, 55 E/O, 3 E/C for a net of 6 degrees overlap. As you can see the Intake closing and exhaust opening points are the same. The overlap increases which should carry a little more power up top at WOT at the expense of a bit of idle stability. Both are easy to tune. Mavn tried both and picked up a bit of power and dropped a bit of time, but a converter change occurred as well...meaning Stage 1 may have dropped into the 10's as well at some point.
If not do you have a pro LS cam that will ?
10-17-2019 | 07:51 PM
#62
10-18-2019 | 08:53 AM
#63
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Hello, the SUM-8715 is a versatile cam and yes it will work well on a LSA supercharged 6.0.
10-25-2019 | 02:26 PM
#64
I run the Summit STG2 in my 4.8. Planned to rev to 7800+ with it... Seems to "hit a wall" about 7200 ish. Dual BTR .660 lift springs... This is with an LS6 intake. Has good street manors and performs well IMO. Trapped 156 last outing at 3100lbs on "cam only" 4.8. 20-22lbs on an S480. no trouble making boost on the brake either.
Last edited by Forcefed86; 10-29-2019 at 10:38 AM.
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10-26-2019 | 07:18 PM
#65
I run the Summit STG2 in my 4.8. Planned to rev to 7800+ with it... Seems to "hit a wall" about 7200 ish. Dual BTR .660 lift springs... This is what an LS6 intake. Has good street manors and performs well IMO. Trapped 156 last outing at 3100lbs on "cam only" 4.8. 20-22lbs on an S480. no trouble making boost on teh brake either.
I like reading that! I've got the same cam in a 4.8 and running it with a PT7675. Car is heavier, 3550 raceweight. I'm just hoping to learn and run 9s.
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freeky (10-27-2019)
10-26-2019 | 11:11 PM
#66
I run the Summit STG2 in my 4.8. Planned to rev to 7800+ with it... Seems to "hit a wall" about 7200 ish. Dual BTR .660 lift springs... This is what an LS6 intake. Has good street manors and performs well IMO. Trapped 156 last outing at 3100lbs on "cam only" 4.8. 20-22lbs on an S480. no trouble making boost on teh brake either.
10-28-2019 | 08:48 AM
#67
Thanks man! Haven’t been online much at all. Lost in "2 year old land" mostly. Unfortunately don’t get on YB much either. I finally got a trip to the track and have a little time and it’s unseasonably cold. They keep cancelling events… Stinks, really wanted that 8 sec slip on this 4.8! Not that it means that much these days... everyone is getting so quick!
11-27-2019 | 02:27 PM
#71
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With the Summit Racing Pro LS stage 2 turbo camshaft and the use of stock rocker arms we recommend using a pushrod length checker. In most cases a 7.400 in. or 7.425 in. pushrod will work. It's particularly important to check pushrod length if the cylinder heads have been milled. If you wanted to check for pushrod length and do not already have a pushrod length checker we offer the Trick Flow TFS-9501.
01-27-2020 | 07:55 PM
#72
Installed my stg 2 today. Finding as follows, 0.001 less lift for the intake lobe and 0.004 more on the exhaust. 109 icl and 117.25 ecl. Found it was off a few degrees using the 0.050 numbers by seemed fine using the 0.006 numbers. Anyway take this as a FYI if anyone is wondering about the accuracy of the cam. Looks good to me.
Last edited by jester1; 01-27-2020 at 08:41 PM.
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forcd ind (01-28-2020)
01-28-2020 | 10:01 AM
#73
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Installed my stg 2 today. Finding as follows, 0.001 less lift for the intake lobe and 0.004 more on the exhaust. 109 icl and 117.25 ecl. Found it was off a few degrees using the 0.050 numbers by seemed fine using the 0.006 numbers. Anyway take this as a FYI if anyone is wondering about the accuracy of the cam. Looks good to me.
Last edited by Summitracing; 01-28-2020 at 02:03 PM.
01-28-2020 | 10:33 PM
#74
Hi Jester, if you would like to send that cam back...we'd be happy to put it on the Adcole for you and send a report. Lobes are rounded to the nearest degree by duration first and split second, so the most we expect is our .050 numbers to be a max .6 of one degree off from where we put the lobes. This is more of a function of the way how we describe the numbers than how the cams are ground. Here's a good article on how to the cams are manufactured here in the USA on a Landis 3LB
No but thanks for the offer. I believe the cam is just fine, the only real thing that went over my head maybe because I was exhausted was the EX (-2) ATDC number. I chatted with a summit tech who quickly pointed out that it was exactly where it needs to be, that's when the light bulb when off and I called it a night. Better safe than sorry, I took my own advice for a change. Now if I can only decide on what turbo to use Id be golden, cant make up my mind.
01-29-2020 | 07:48 AM
#75
I have been running mine now close to a year, nothing to compare it to, but it runs/idles fine,
comes up on boost quick. I tend to run lower preload, but run a max of 6500, or less.
Its a 6.0, idle vac is in the 14 range, PB work fine.
comes up on boost quick. I tend to run lower preload, but run a max of 6500, or less.
Its a 6.0, idle vac is in the 14 range, PB work fine.
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ClintBeastwood (01-26-2021)
02-06-2020 | 10:36 AM
#78
I've personally run the Speed Inc, Tick, BTR, Comp catalog turbo offering, Summit, and many others and if blindfolded I bet you couldn't tell the difference between them.
02-06-2020 | 10:36 AM
#79
I am in the market for a “stage 2” turbo cam
Derek
02-06-2020 | 01:10 PM
#80
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We spoke with him yesterday. I don't know when he will be doing the test. He has his Facebook and Youtube channel and we will likely link to those on our OnAllCylinders Blog when he has the test published.
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freeky (02-07-2020)