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I have btr stage 2 turbo cam. 5.3 all btr head gear(dual springs etc) and ls7 lifters. Running twin t4 eBay gt35s.
Hoping to have it running before end of month and tuned very soon after. The cam I have is slightly larger than the summit one on here pretty sure.
A tuner told me last night I should be running a ls9 cam on 5.3 and nothing bigger. Showed the cam card and said I’ll be blowing boost out the exhaust and it’ll be a dog before 3500rpm. Idk, my motors together already so I’m sticking with what I have for awhile.
Your tuner said you're going to lose boost with a boost cam?
Please post his name here in the comments so no one else ever goes to him . Jesus christ people like that are tuning cars for a living and dont even understand basic cam knowledge
I’m not having him tune car. He owns local dyno and does tuning work on side. He said cam won’t work good on 5.3 it’s way to big. The overlap or whatever will just blow the boost out the exhaust.
one thing I’ve learned recently is all tuners seem to have VERY different ideas of what a “good” setup is. Almost all want to take someone’s setup and change it. He’s a good guy so not going to put him on blast.
Is it a manual trans car? I don't give a care much what my engine does below 3500! lol. You don't want to make stupid power at low RPM anyway... it breaks things! My 2 step is set at 3500… Engine never sees below that under power. I actually liked my ls9 5.3 setup. It came on strong at 5500+ and “saved” my gen3 5.3 from eating itself making big power early in the rev range. It’ll pull to 7k on the small bore motors as well. Leaving a lot on the table but not a bad little cam. Went 8.93 @ 153 with the LS9 cam on a lazy 8.6:1 5.3. Small S475.
Stage 2 summit cam on my 799 headed 4.8 S480 combo traps 156 around 22lbs and a 3100lb race weight. Less than ideal gearing and shifting at 7200 or so. (doesn’t pull past 7200 on my setup) Running BTR dual .660lift springs. (It’s not floating the valves) LS6 intake.
Last edited by Forcefed86; Nov 6, 2019 at 07:30 AM.
Is it a manual trans car? I don't give a care much what my engine does below 3500! lol. You don't want to make stupid power at low RPM anyway... it breaks things! My 2 step is set at 3500… Engine never sees below that under power. I actually likes my ls9 5.3 setup. It came on strong at 5500+ and “saved” my gen3 5.3 from eating itself making big power early in the rev range. It’ll pull to 7k on the small bore motors as well. Leaving a lot on the table but not a bad little cam. Went 8.93 @ 153 with the LS9 cam on a lazy 8.6:1 5.3. Small S475.
Stage 2 summit cam on my 799 headed 4.8 S480 combo traps 156 around 22lbs and a 3100lb race weight. Less than ideal gearing and shifting at 7200 or so. (doesn’t pull past 7200 on my setup) Running BTR dual .660lift springs. (It’s not floating the valves) LS6 intake.
Mine is a gen 3 rod 5.3 with 706 heads. It’s a 5spd also.
Personally when you're limited by the Gen3 motor power level, and running a manual, I tend to agree your cam choice is on the large side. It will work... but I would have gone with a small duration big lift cam. Something in the 212-220 duration range on a tight LSA and lots of lift. I liked the JFR "triple 12" made for a "snappy" combo. Would be great with a manual setup around 600 crank...
Personally when you're limited by the Gen3 motor power level, and running a manual, I tend to agree your cam choice is on the large side. It will work... but I would have gone with a small duration big lift cam. Something in the 212-220 duration range on a tight LSA and lots of lift. I liked the JFR "triple 12" made for a "snappy" combo. Would be great with a manual setup around 600 crank...
Yeah the cam came already inside engine. However, my plan is to run 500whp ish with tune on the gen3 rods and build another block with forged internals, turn boost up a bunch and run a MVB th400. Possibly an aftermarket computer also. For now car will stay manual with 500ish to enjoy for alittle. My biggest question is always 5.3 block build or 6.0 lol. In alittle while I’ll figure it out. For now gotta get this thing done.
I have an idle clip with the stage 2 cam, but its in MP4 (whatever that means) and cant post.
App you have to convert them, and buy some converter, lol.
We made another post on this, but it's good for the information to be out there. Going with a .600 lift rated spring is a good idea with a .600 lift cam. The 1218 has a coil bind height of 1.140 in. With the standard 1.800 installed height and .600 lift, you would be .060 out of bind. This actually calms the coils down and reduces stress by keeping them from doing a hula dance with every lift event. Some run considerably tighter than .060, but .050 is a good number for. A lot of folks prefer a Dual just for the redundancy. They have to be considerably stiffer to offset their own weight and the increased retainer diameter. A good choice for duals is TFS-2500286P (steel retainer) or TFS-2500287P (ti retainer) uses a nanopeen Pac spring and have an excellent track record for long life. The TFS-16986-16 also has an excellent reputatoon with it's 918. Hard to go wrong with either.
So Im now a bit confused because I just called and the chap on the phone said use PAC 1219 not 1218, then the reverse is said here. So which ones are the official to be used with this cam as to not compromise? Returns and mistakes are not possible with me at this time. There are no second chances those are long gone unfortunately so pardon me if I come across mean, not my intent.Thanks.
Will this cam be okay to run with Elgin .600 lift springs? I’m hoping to run it up to 7k rpm
Asked by ANDREW on October 14, 2019 A:Thank you for your question. The Summit 8706 Pro LS camshaft can be used with spring rated at 0.600 in. lift. We recommend the 2500286 or the 2500287 because we know they will handle over 7000k of rpm. Other springs can definitely be used if the springs are designed for similar use. i used this valve spring . recommened by the summit web site
Will this cam be okay to run with Elgin .600 lift springs? I’m hoping to run it up to 7k rpm
Asked by ANDREW on October 14, 2019 A:Thank you for your question. The Summit 8706 Pro LS camshaft can be used with spring rated at 0.600 in. lift. We recommend the 2500286 or the 2500287 because we know they will handle over 7000k of rpm. Other springs can definitely be used if the springs are designed for similar use. i used this valve spring . recommened by the summit web site
i used this valve spring . recommended from the summit web site
So Im now a bit confused because I just called and the chap on the phone said use PAC 1219 not 1218, then the reverse is said here. So which ones are the official to be used with this cam as to not compromise? Returns and mistakes are not possible with me at this time. There are no second chances those are long gone unfortunately so pardon me if I come across mean, not my intent.Thanks.
No problem. The 918's are fine and those are what the lobe's ramp rates were designed around. The 919's just a little better due to the higher rate. Simply put, they'll give you a little more rpm so run them if you have them.
No problem. The 918's are fine and those are what the lobe's ramp rates were designed around. The 919's just a little better due to the higher rate. Simply put, they'll give you a little more rpm so run them if you have them.
The "rumor" I keep hearing is these lobes specifically designed to be more gentle on the valve train and allow much higher RPM. Is this really the case? I see Baker Engineering cams of similar duration being used by some of the SBE record holders. These guys (Capizzi) is taking a basic SBE 5.3 setup on factory casting heads to 8300ish RPM. Originally this was on a factory rocker with trunion upgrade, pushrods, and of course springs. While I know you won't state your cams are rated for this kind of abuse... Is the general idea of the lobe design to accommodate higher RPM while remaining "gentle" on the valve train?
I also run your STG2 Summit camshaft. I'm curious why my 4.8 appears to fall on its face around 7200rpm... when folks with similar "stage 2 sloppy cams" (elgin camshafts) are able to rev out to 7800-8k using OEM intake manifolds. I was under the impression that my setup would at least carry the power much higher in the RPM range. I run the large S480 1.32 T6. SItting around 1.4:1 back pressure at 20lbs. Running dual .660 lift BTR springs and aftermarket 7.35 pushrods (checked the length with a push rod checker. IAt's are sitting around 140... I See no reason this setup wouldn't pull more RPM is what I'm getting at. Any light on this subject would be appreciated.
Currently trapping 156 or so at 3100lbs. IF I carry the shift past 7200 the nose of the car literally drops from power lost. Best ET and MPH appear to be had shifting right at 7200.
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