When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Anyone familiar with this cam? Made in US, billet core, 1/2 price of Comp or Tick cams.
.550" lift on 224 degrees @.050 seems like a very fast ramp, not to mention if you run 1.6 rockers and get .587" lift. If I'm understanding the numbers correctly these lobes are even more aggressive than the XFI lobes.
The springs summit specs (174004) are basically a Pac 1218, in fact I would bet they are a rebranded Pac 1218. They say 130lbs at 1.800 installed height and 310 lb/in.
I'm a newb, but that seems like a light spring for a fast lobe. What spring would you experts recommend?
I'm also looking at Summit's 174005 spring which is still a beehive but with 140lb @ 1.800 and 340lb/in. Would that be a better match?
Here are a couple of YouTube clips I found of the 8803:
Seems familiar. If you haven't already, do a search with that cam profile on here to see what you can see. IIRC pretty much all 220/230'ish cam profiles were in the 450hp range with good ported heads/supporting mods.
Hi there, the lobes are indeed quick but designed around the PAC beehives and their weight. We get rid of a lot of mass with the deletion of a second spring PLUS retainer diameter,...similar to what GM did themselves on the LT4 but a lot more seat and open pressure. This 224 @ .050 cam typically turns 7k+ with a 11/32 solid stem 2.080 stainless valve along with "heavy" aluminum stud rockers as it's built into the design criteria.
The sharper-eyed folks will probably notice .550 works with a $72 LS6 spring. Putting the commonly available 1.6 rocker puts it at .587 and just comfortably under the limit of most common performance heads from AFR, Brodix, TFS, Dart, Edelbrock and Summit Precision Cast AND heads using the 1218 (SUM-174004) or 1219 (SUM-174005) springs.
Here's an article on the manufacturing process...which is the same as our Pro LS cams.
To see how this lobe series behaves with an even MORE aggressive 1.7 ratio, here's the SUM-1226 (retrofit LS firing order versions of 8800/8801/8802/8803). Pat Topolinski and Frankie Forman from Engine Power used some TFS 230's on top of our new Summit SPC block and Forged Pro Rotating Assembly.
The cams have been making people happy and we are expanding the lineups even further. 2025 is going to be great!
This 224 @ .050 cam typically turns 7k+ with a 11/32 solid stem 2.080 stainless valve along with "heavy" aluminum stud rockers as it's built into the design criteria.
Although the 1218/Sum-174004 is the most popular, we like the Sum-174005/1219 a little more. A bit more pressure and lift capability. If you want to set it on kill, shimming to .050 bind calms the spring by preventing surge.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Summit 8803 Cam 
