AutoX 1972 C10 6.0/5.3 cam Summit/cam motion
01-16-2019, 07:20 AM
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AutoX 1972 C10 6.0/5.3 cam Summit/cam motion Good day . Im looking to to drop a cam in a 4000lb truck that's used for autocross. may also put a turbo on it (8psi) but not really thinking that would make a big difference in the cam selection as i dont care about what my hp numbers are after 6000 rpms. I am actually wanting to try one of those summit cams 8712, 8718, 8719 maybe even one of those 8715 ghost cams. I have the fitech ultimate kit with 102 TB . i also use the truck for cruising to car shows 5 times to every 1 time i autocross
1. out of those cams what would you suggest.
2 is there a better cam out there for my needs. ( yes i may need a custom grind )
Stock stall, 3:73 . 28.6 tire 4l60E . have 2003 5.3 in the truck but also have a 6.0 ho out of an escalade on a stand
Thanks in advance
should this question be in the autox forum?
1. out of those cams what would you suggest.
2 is there a better cam out there for my needs. ( yes i may need a custom grind )
Stock stall, 3:73 . 28.6 tire 4l60E . have 2003 5.3 in the truck but also have a 6.0 ho out of an escalade on a stand
Thanks in advance
should this question be in the autox forum?
01-16-2019, 08:02 AM
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not that i dont want it its just im just never there even when i gun it 2nd 3rd gear( getting on , or already on a open highway in 4th . it shifts at around 6000 rpm. and when im in forth gear its at 3000 and maybe gets to 5000 rpm
01-16-2019, 08:10 AM
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01-16-2019, 10:00 AM
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01-18-2019, 08:42 PM
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01-20-2019, 05:23 PM
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i think I’m going to pull the. Trigger. On that cam Picked up a steal on a 4.8. Going to use a Fitech 750 ultimate kit and a borg s475 I think the turbo is my friend has for me. What’s still would you suggest. (Remember autocross and heavy truck)
01-20-2019, 06:35 PM
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Good luck autocrossing an S475 on a 4.8. You'll come out of a corner, get rear ended by the boost bus, and spin out every single time. Nothing like gaining 200 ft-lbs of torque within 400 RPM. Turbos and autocross don't go well together without some VERY careful planning. You would want something like a single 62mm or smaller with a low PSI spring and possibly an electronic boost controller so you can ramp boost in like a centri blower.
The Sum-8715 is a good cam, but I definitely wouldn't recommend it for autocross or a 4.8. It'll be all top-end, not quite as responsive enough at low speeds with a 4.8.
You want something with a heavy 1500-2500 RPM grunt/response. Snappy throttle with as much dynamic compression you can get.
Howard's 190315-08 fits the bill. The 210/214 duration with a 108 LSA and 4 degrees of advance ground in gives it one of the highest dynamic compression ratios of any off the shelf cam. You're talking about a cam with .050" durations similar to your average truck cam, but with a much earlier intake valve closing, and higher than average lift for a truck cam (.598/.598). You'll pick up major low end torque and throttle response, and still gain 50 horsepower up top over a stock cam. Its a sewing machine on the valvetrain though. The ramp rates on the intake and exhaust are very very aggressive. Almost as aggressive as anything else you'll find out there in a hydraulic roller for an LS engine. I've found it to outperform cams much bigger when it comes to overall torque production.
The Sum-8715 is a good cam, but I definitely wouldn't recommend it for autocross or a 4.8. It'll be all top-end, not quite as responsive enough at low speeds with a 4.8.
You want something with a heavy 1500-2500 RPM grunt/response. Snappy throttle with as much dynamic compression you can get.
Howard's 190315-08 fits the bill. The 210/214 duration with a 108 LSA and 4 degrees of advance ground in gives it one of the highest dynamic compression ratios of any off the shelf cam. You're talking about a cam with .050" durations similar to your average truck cam, but with a much earlier intake valve closing, and higher than average lift for a truck cam (.598/.598). You'll pick up major low end torque and throttle response, and still gain 50 horsepower up top over a stock cam. Its a sewing machine on the valvetrain though. The ramp rates on the intake and exhaust are very very aggressive. Almost as aggressive as anything else you'll find out there in a hydraulic roller for an LS engine. I've found it to outperform cams much bigger when it comes to overall torque production.
01-20-2019, 06:52 PM
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Good luck autocrossing an S475 on a 4.8. You'll come out of a corner, get rear ended by the boost bus, and spin out every single time. Nothing like gaining 200 ft-lbs of torque within 400 RPM. Turbos and autocross don't go well together without some VERY careful planning. You would want something like a single 62mm or smaller with a low PSI spring and possibly an electronic boost controller so you can ramp boost in like a centri blower.
The Sum-8715 is a good cam, but I definitely wouldn't recommend it for autocross or a 4.8. It'll be all top-end, not quite as responsive enough at low speeds with a 4.8.
You want something with a heavy 1500-2500 RPM grunt/response. Snappy throttle with as much dynamic compression you can get.
Howard's 190315-08 fits the bill. The 210/214 duration with a 108 LSA and 4 degrees of advance ground in gives it one of the highest dynamic compression ratios of any off the shelf cam. You're talking about a cam with .050" durations similar to your average truck cam, but with a much earlier intake valve closing, and higher than average lift for a truck cam (.598/.598). You'll pick up major low end torque and throttle response, and still gain 50 horsepower up top over a stock cam. Its a sewing machine on the valvetrain though. The ramp rates on the intake and exhaust are very very aggressive. Almost as aggressive as anything else you'll find out there in a hydraulic roller for an LS engine. I've found it to outperform cams much bigger when it comes to overall torque production.
The Sum-8715 is a good cam, but I definitely wouldn't recommend it for autocross or a 4.8. It'll be all top-end, not quite as responsive enough at low speeds with a 4.8.
You want something with a heavy 1500-2500 RPM grunt/response. Snappy throttle with as much dynamic compression you can get.
Howard's 190315-08 fits the bill. The 210/214 duration with a 108 LSA and 4 degrees of advance ground in gives it one of the highest dynamic compression ratios of any off the shelf cam. You're talking about a cam with .050" durations similar to your average truck cam, but with a much earlier intake valve closing, and higher than average lift for a truck cam (.598/.598). You'll pick up major low end torque and throttle response, and still gain 50 horsepower up top over a stock cam. Its a sewing machine on the valvetrain though. The ramp rates on the intake and exhaust are very very aggressive. Almost as aggressive as anything else you'll find out there in a hydraulic roller for an LS engine. I've found it to outperform cams much bigger when it comes to overall torque production.
01-21-2019, 09:37 AM
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Good luck autocrossing an S475 on a 4.8. You'll come out of a corner, get rear ended by the boost bus, and spin out every single time. Nothing like gaining 200 ft-lbs of torque within 400 RPM. Turbos and autocross don't go well together without some VERY careful planning. You would want something like a single 62mm or smaller with a low PSI spring and possibly an electronic boost controller so you can ramp boost in like a centri blower.
The Sum-8715 is a good cam, but I definitely wouldn't recommend it for autocross or a 4.8. It'll be all top-end, not quite as responsive enough at low speeds with a 4.8.
You want something with a heavy 1500-2500 RPM grunt/response. Snappy throttle with as much dynamic compression you can get.
Howard's 190315-08 fits the bill. The 210/214 duration with a 108 LSA and 4 degrees of advance ground in gives it one of the highest dynamic compression ratios of any off the shelf cam. You're talking about a cam with .050" durations similar to your average truck cam, but with a much earlier intake valve closing, and higher than average lift for a truck cam (.598/.598). You'll pick up major low end torque and throttle response, and still gain 50 horsepower up top over a stock cam. Its a sewing machine on the valvetrain though. The ramp rates on the intake and exhaust are very very aggressive. Almost as aggressive as anything else you'll find out there in a hydraulic roller for an LS engine. I've found it to outperform cams much bigger when it comes to overall torque production.
The Sum-8715 is a good cam, but I definitely wouldn't recommend it for autocross or a 4.8. It'll be all top-end, not quite as responsive enough at low speeds with a 4.8.
You want something with a heavy 1500-2500 RPM grunt/response. Snappy throttle with as much dynamic compression you can get.
Howard's 190315-08 fits the bill. The 210/214 duration with a 108 LSA and 4 degrees of advance ground in gives it one of the highest dynamic compression ratios of any off the shelf cam. You're talking about a cam with .050" durations similar to your average truck cam, but with a much earlier intake valve closing, and higher than average lift for a truck cam (.598/.598). You'll pick up major low end torque and throttle response, and still gain 50 horsepower up top over a stock cam. Its a sewing machine on the valvetrain though. The ramp rates on the intake and exhaust are very very aggressive. Almost as aggressive as anything else you'll find out there in a hydraulic roller for an LS engine. I've found it to outperform cams much bigger when it comes to overall torque production.
Last edited by Summitracing; 01-21-2019 at 09:57 AM.
01-24-2019, 06:55 PM
#16
Good luck autocrossing an S475 on a 4.8. You'll come out of a corner, get rear ended by the boost bus, and spin out every single time. Nothing like gaining 200 ft-lbs of torque within 400 RPM. Turbos and autocross don't go well together without some VERY careful planning. You would want something like a single 62mm or smaller with a low PSI spring and possibly an electronic boost controller so you can ramp boost in like a centri blower.
The Sum-8715 is a good cam, but I definitely wouldn't recommend it for autocross or a 4.8. It'll be all top-end, not quite as responsive enough at low speeds with a 4.8.
You want something with a heavy 1500-2500 RPM grunt/response. Snappy throttle with as much dynamic compression you can get.
Howard's 190315-08 fits the bill. The 210/214 duration with a 108 LSA and 4 degrees of advance ground in gives it one of the highest dynamic compression ratios of any off the shelf cam. You're talking about a cam with .050" durations similar to your average truck cam, but with a much earlier intake valve closing, and higher than average lift for a truck cam (.598/.598). You'll pick up major low end torque and throttle response, and still gain 50 horsepower up top over a stock cam. Its a sewing machine on the valvetrain though. The ramp rates on the intake and exhaust are very very aggressive. Almost as aggressive as anything else you'll find out there in a hydraulic roller for an LS engine. I've found it to outperform cams much bigger when it comes to overall torque production.
The Sum-8715 is a good cam, but I definitely wouldn't recommend it for autocross or a 4.8. It'll be all top-end, not quite as responsive enough at low speeds with a 4.8.
You want something with a heavy 1500-2500 RPM grunt/response. Snappy throttle with as much dynamic compression you can get.
Howard's 190315-08 fits the bill. The 210/214 duration with a 108 LSA and 4 degrees of advance ground in gives it one of the highest dynamic compression ratios of any off the shelf cam. You're talking about a cam with .050" durations similar to your average truck cam, but with a much earlier intake valve closing, and higher than average lift for a truck cam (.598/.598). You'll pick up major low end torque and throttle response, and still gain 50 horsepower up top over a stock cam. Its a sewing machine on the valvetrain though. The ramp rates on the intake and exhaust are very very aggressive. Almost as aggressive as anything else you'll find out there in a hydraulic roller for an LS engine. I've found it to outperform cams much bigger when it comes to overall torque production.
Thanks.