[Fast6.3]

I have been looking at cams and saw this one from compcams which
Claims this new lobe design is very gentle a has been spintron tested to be stable to 7400 rpm. The specs are 227/238 @50 lift with 1.8 rockers .650/.639 on a 16.5 lsa. I would like to know if some one has installed it or for the engine gurus what your thoughts are on this cam

[Hyper SS]

[QUOTE=Fast6.3;10783403]I have been looking at cams and saw this one from compcams which
Claims this new lobe design is very gentle a has been spintron tested to be stable to 7400 rpm. The specs are 227/238 @50 lift with 1.8 rockers .650/.639 on a 16.5 lsa. I would like to know if some one has installed it or for the engine gurus what your thoughts are on this cam[/QUOT

High lift!!!!!!

[Fast6.3]

Yes I saw the high lift but supposedly with the lst lobes its not a problem according to comp
Also Lingenfelter Livernois and katech use a lot of lift. Thats the main reason Im looking into this one. My first choice is the GT32 from Lingenfelter but if the comp is easier on the valverrain ill take it.

[KingLT1]

It all comes down to what you are doing with the car. If it's a week end toy that won't see a bunch of miles over the years then it may be fine. If you are going to daily it and plan on putting 50k miles on the car over the next 3-4years I would look at things a bit different.

For a daily driver that is Too much lift...not needed anyway unless you change the intake manifold and heads. I would do a .600 lift cam motion grind if you want to use stock style rockers, drop-in lifters, reasonable rate valve springs, and want the combination to last more then 20k miles.

If it's a weekend toy street/strip car then it would work with attention to detail. I would start buy looking at a ported MSD, Some good Heads, quality lifters-> Johnson 2110, TSP roller tip rocker, 3/8 push rods, and Quality springs -> Pac 1200X series.

Comp is the last company I would trust after all the bad products they pushed out to the market over the years. These companies anticipate the car being a garage queen and will not see the mileage accumulate as it would if stock which a lot of times is the case. Many mod cars and drive them much less.

[Joshinator99]

Also keep in mind the Comp stuff is not a VVT-delete cam.

[oldman]

Originally Posted by Joshinator99

Also keep in mind the Comp stuff is not a VVT-delete cam.

Their new soft lift or whatever lift cam is AFM delete. Sorry I ain't buying it. Cam Motion sub .600 lift. GM does 10.6 with the hot cam at .576 lift and STOCK valve springs... just saying.

[Fast6.3]

Thanks guys for your input went with a custom cam from cam motion

[Joshinator99]

Originally Posted by Fast6.3

Thanks guys for your input went with a custom cam from cam motion

Good move.

Just for clarification (I know oldman knows this lol), but AFM-delete and VVT-delete are two different things. If you’re going to race the car, most shops will have you eliminate both.

[oldman]

Cam Motion does have an option of 4 degrees VVT on their smaller grinds... My original cam was 22 degree. No tuner I know of plays with though. If I was completely bored and had a time machine maybe. I'm actually OK with 4 degrees on a small cam and 6800 RPM with 130 seat springs. But at some point RPM and spring you probably want a solid gear (compete lock).

[GTO_Gregory]

If you telephone Comp Cams they may suggest different springs for the camshaft. When I talked to them I was recommended a spring kit. The kit with springs, retainers, keepers, seals & pushrods costs $1,074.72, and is identified by SKU: CK224-300-13.

[GTO_Gregory]

Originally Posted by Joshinator99

Also keep in mind the Comp stuff is not a VVT-delete cam.

I've also been checking with Comp Cams for a DoD AFM friendly camshaft.
Their mild offering for LT1's is: SKU 624-524-13. It falls in the series of XFI AFM camshafts.

Specs. vary a bit due to the cam phaser, but are in the area of:
220/232 Duration @ .050"
.572"/.529" Intake/Exhaust
117 LSA

Grind Number: 270PIIHR17
RPM Range: 1,800-6,900
Works with VVT and AFM
Need Springs P/N: 7230-16
Spring Kit SKU 7230TS-KIT, Cost: $545.95
Need Phaser Limiter Kit SKU 5456, Cost $68.64

[oldman]

I actually like AFM and VVT tech but as a hobby I want dependable power, it is just has to be reliable and consistent with a plain cam, low lift, gentle ramps, reasonable springs and a solid timing gear. Like King said “depends what you want”. Any deviation from the above is a compromise in price, longevity and consistency.

So a small AFM cam sounds good, and cheap, and if you are doing the work yourself, and want to gain so tuning experience, by all means go for it. I would rather have an AFM cam vs any above .600 lift cam...but that is just me. Others only want power and hence most cams are fast ramp .640” , jobs because it makes power.

[Redlinez]

Why don't I hear much about the Gen V LT1 hotcam? I guess the 10.6 is with the GMPP heads/cam combo. I always liked my hotcam in my 1995 Z28. I daily drive mine, so this makes me wonder about cam choices when that day comes. I overcammed my 99 TA with a Futral F14X that had too much lift and duration IMO. It was way too soft down low, but ran pretty good at the track. My hotcammed LS1 Z28 ran great too for what it was.

[KingLT1]

The main issue with VVT is high rpm. It has shown to be unstable around 6800 rpm and above with aftermarket cams which is why several shops started switching to full lock out instead of even the 4 degree limiter. So if you decide you want to keep VVT then I would probably choose a grind that has a power range limited to 66-6700rpm.


Far as the Hot cam, it's not popular because it doesn't boast those big lift figures. 95% of all enthusiasts look at lift and lsa when selecting a cam. Why choose .570 lift when you can gain 10-15hp with .640 lift even though you will be replacing valve springs and possible more valve train components every 4-5 oil changes lol. Nobody markets longevity and reliability, it's all about them power numbers.