Check out the NEWEST Summit Pro LS Cams
10-05-2018, 02:15 PM
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Check out the NEWEST Summit Pro LS Cams The new Summit Pro LS cams have been a hit. The lineup was strong to begin with, but you guys chimed in with some great ideas for more new cams. We pride ourselves on listening to our customers and it's resulted in two new Truck Swap cams and three new Turbo grinds. They are in stock and ready to be ordered and will be in our Texas store by Wednesday of next week.
First, here's what we've done with the Truck Swap lineup.
Since it came out on the 4th of July, the new Summit Stage 1 Pro LS Truck Swap cam has been getting great reviews. It’s a .500 lift drop-in cam with 209/217 duration, 113 lobe separation, and is ground with one degree of advance. It sounds great and tunes easy. It was designed for strong midrange power, but many reported their truck no longer needed to downshift going up medium grades while towing! This helps preserve fuel mileage and we got to thinking? How about a pure Towing/RV cam?!? The result is the new Pro LS stage 1 Drop-in Truck Swap Torque/Efficiency version. The SUM-8718's specs are 205/217 duration with 112 degrees of lobe separation, 2 degrees of advance, and .500 lift. The new cam is designed to have a hint of an idle, won’t require a spring swap, and increases torque everywhere through the RPM range. Versus the normal stage one truck, we removed one degree from intake opening and three degrees from intake closing. The events are -8 IVO, 36 IVC, 42 EVO, and -5 EVC.
Some of the Stage 1 Truck Swap cam owners also said “I love this cam…do you offer a higher lift version?” The answer is yes! The new Stage 1 .550-Lift Truck Swap cam p/n SUM-8719. Some of you guys knew about that one already though and it's now in stock.
Next, some of you asked for a .600 lift Truck cam. What came out of that is a cam so versatile, that it's really three cams in one. It's a High-lift truck cam, it's a Stealth cam, and it's a Turbo cam. You'll see why in a bit. The events are -1 IVO, 43 IVC, 55 EVO, and -2 IVC which results in 222/233 duration, 115 Lobe separation, 5 degrees advance and .600//575 lift. We expect people will be dialing that into a number of different applications with our adjustable timing sets. With minimal overlap, it makes a great a Stealth/Sleeper cam. Finally, we had to settle on a name -so it now serves as our Stage 1 Stealth Turbo cam p/n SUM-8715 ...but you can use it any which way you want.
Now that we had a good Stage 1 and 2 Turbo cams finalized, doing a Stage 3 and 4 made sense. How where they developed? First and most importantly, it was done scientifically. They are designed for T4 hot sides with full length performance exhaust systems. We kept the same intake lobes and cam timing as our Stage 3 and Stage 4 naturally aspirated cams. They too are designed to work with factory intake manifolds, so no reason to tweak those events. Next we went with a milder exhaust lobe to break open easier against cylinder pressure which results in exhaust lift dropping to .575. We kept the exhaust opening events the same as our naturally aspirated cams and we set exhaust closing points to net 2 degrees of overlap to prevent reversion.
The result? The new Stage 3 Pro LS Turbo cam p/n SUM-8716's events are 5 IVO, 46 IVC, 57 EVC, and -3 EVC. This results in 231/234 duration, 115 lobe separation, and 5 degrees of advance. Lift is .600/.575.
Next you'll find something interesting with Turbo Stage 4 that's different than Stages 1,2,3, but it will make sense when you see it.
The Pro LS Stage 4 Turbo cam is p/n SUM-8717. The events are 7 IVO, 50 IVC, 59 EVO and -5 EVC (again to net 2 degrees overlap). The result is 237/234 duration, 117 lobe separation and 5 degrees of advance with .600/.575 lift. This makes it the only reverse-split cam in the lineup and will undoubtedly make some people's heads explode if they don't understand valve events. We're really looking forward to seeing you guys put this one into action.
So there you have it. Summit Racing has taken an already expansive Pro LS lineup of cams and made it even better. We've attached a chart that has the whole lineup in one place with specs and descriptions. Lastly, we also produced a video on the whole lineup. It goes into every part number in the 4 categories (Automotive, Truck Swap, Turbo, and Single Plane), so you may want to skip forward as necessary.
We have a couple more cool things we're announcing next week, so stay tuned! Again, thank you folks for help us grow this lineup.
First, here's what we've done with the Truck Swap lineup.
Since it came out on the 4th of July, the new Summit Stage 1 Pro LS Truck Swap cam has been getting great reviews. It’s a .500 lift drop-in cam with 209/217 duration, 113 lobe separation, and is ground with one degree of advance. It sounds great and tunes easy. It was designed for strong midrange power, but many reported their truck no longer needed to downshift going up medium grades while towing! This helps preserve fuel mileage and we got to thinking? How about a pure Towing/RV cam?!? The result is the new Pro LS stage 1 Drop-in Truck Swap Torque/Efficiency version. The SUM-8718's specs are 205/217 duration with 112 degrees of lobe separation, 2 degrees of advance, and .500 lift. The new cam is designed to have a hint of an idle, won’t require a spring swap, and increases torque everywhere through the RPM range. Versus the normal stage one truck, we removed one degree from intake opening and three degrees from intake closing. The events are -8 IVO, 36 IVC, 42 EVO, and -5 EVC.
Some of the Stage 1 Truck Swap cam owners also said “I love this cam…do you offer a higher lift version?” The answer is yes! The new Stage 1 .550-Lift Truck Swap cam p/n SUM-8719. Some of you guys knew about that one already though and it's now in stock.
Next, some of you asked for a .600 lift Truck cam. What came out of that is a cam so versatile, that it's really three cams in one. It's a High-lift truck cam, it's a Stealth cam, and it's a Turbo cam. You'll see why in a bit. The events are -1 IVO, 43 IVC, 55 EVO, and -2 IVC which results in 222/233 duration, 115 Lobe separation, 5 degrees advance and .600//575 lift. We expect people will be dialing that into a number of different applications with our adjustable timing sets. With minimal overlap, it makes a great a Stealth/Sleeper cam. Finally, we had to settle on a name -so it now serves as our Stage 1 Stealth Turbo cam p/n SUM-8715 ...but you can use it any which way you want.
Now that we had a good Stage 1 and 2 Turbo cams finalized, doing a Stage 3 and 4 made sense. How where they developed? First and most importantly, it was done scientifically. They are designed for T4 hot sides with full length performance exhaust systems. We kept the same intake lobes and cam timing as our Stage 3 and Stage 4 naturally aspirated cams. They too are designed to work with factory intake manifolds, so no reason to tweak those events. Next we went with a milder exhaust lobe to break open easier against cylinder pressure which results in exhaust lift dropping to .575. We kept the exhaust opening events the same as our naturally aspirated cams and we set exhaust closing points to net 2 degrees of overlap to prevent reversion.
The result? The new Stage 3 Pro LS Turbo cam p/n SUM-8716's events are 5 IVO, 46 IVC, 57 EVC, and -3 EVC. This results in 231/234 duration, 115 lobe separation, and 5 degrees of advance. Lift is .600/.575.
Next you'll find something interesting with Turbo Stage 4 that's different than Stages 1,2,3, but it will make sense when you see it.
The Pro LS Stage 4 Turbo cam is p/n SUM-8717. The events are 7 IVO, 50 IVC, 59 EVO and -5 EVC (again to net 2 degrees overlap). The result is 237/234 duration, 117 lobe separation and 5 degrees of advance with .600/.575 lift. This makes it the only reverse-split cam in the lineup and will undoubtedly make some people's heads explode if they don't understand valve events. We're really looking forward to seeing you guys put this one into action.
So there you have it. Summit Racing has taken an already expansive Pro LS lineup of cams and made it even better. We've attached a chart that has the whole lineup in one place with specs and descriptions. Lastly, we also produced a video on the whole lineup. It goes into every part number in the 4 categories (Automotive, Truck Swap, Turbo, and Single Plane), so you may want to skip forward as necessary.
We have a couple more cool things we're announcing next week, so stay tuned! Again, thank you folks for help us grow this lineup.
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Last edited by Summitracing; 10-05-2018 at 02:35 PM.
