F10 vs F11
Thread Starter
On The Tree
Joined: Dec 2001
Posts: 157
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From: Bklyn. N.Y. U.S.A.
F10 vs F11 My car is an A4 C5 with Cartek Stage 2 heads 3.73s and TCS 4200 and all of the bolt on's. Which cam would give the most performance, which would have the better driveability and finally which would be harder on valve springs? Also which valve springs would you install with these cams, I currently have Rev 1116s on my car that have about 5k miles on them.
Last edited by Mitch; Sep 28, 2004 at 11:37 PM.
Originally Posted by jrp
FM11
PP Golds
PP Golds
I was listening to different cams on LS1sounds.com and I couldn't believe how smooth the FM11 idled (although it was only one car that I listened to with it). It seemed a lot smoother than all the 224 cams which are milder...go figure....
The one thing that concerns me about the F11 is the really high lift, thats why I might rather go with an F10. Has Alan ever said what the power difference would be between the two?
I know FMS cam's are pretty highly praised but arent they also known to be pretty hard on the valvetrain the way he grinds them??
The one thing that concerns me about the F11 is the really high lift, thats why I might rather go with an F10. Has Alan ever said what the power difference would be between the two?
I know FMS cam's are pretty highly praised but arent they also known to be pretty hard on the valvetrain the way he grinds them??
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Originally Posted by rmclean99
Actually, FMS cams are easier on the valvetrain compared to Comps XER grinds.
Someone correct me if I'm wrong here, but I am under the impression that this (aggressive lobes) is how FMS gets more power and better drivablilty than others.
yeah well Alan may say that but how do we know for sure. Nothing against Alan but obviously someone will be biased towards their own cams.
Lets face it, there has to be a tradeoff to making more power with a better idle, b/c if it was that simple all Cam makers would be doing the same thing..
Lets face it, there has to be a tradeoff to making more power with a better idle, b/c if it was that simple all Cam makers would be doing the same thing..
TECH Enthusiast
Joined: Mar 2004
Posts: 508
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From: Bloomfield, NM
i say get an f13, it has a little higher powerband that might work better with your stall. it does have a high lift though, .595,.585. and regardless of which one you pick i would recommend the PP golds. good luck
Originally Posted by KB99WS6
yeah well Alan may say that but how do we know for sure. Nothing against Alan but obviously someone will be biased towards their own cams.
Futral is the ****.
Originally Posted by rmclean99
You are wrong. Alan himself posted that his lobes are less aggressive than XER lobes and closer to the LS1 high rpm series.
well, I retract my previous statement. i know even less than i thought i did, which is pretty impressive
KB, no offense but you don't know what you're talking about here. Allan uses Cam Motion lobes in his cam grinds, which i thought was a commonly known fact(or maybe i just spend too much time on the board?). what is also commonly known is that Cam Motion lobes are softer(read : less extreme) then Comp's XER lobes. Futral is the ****.
Staging Lane
Joined: Jun 2003
Posts: 66
Likes: 0
On the F11-F13, approx how high an RPM do you need to spin the motor to in order to hit max power before shifting????????
I previously have run a TR230 & was spinning the motor to almost 7K & ended up smoking the motor (thats not the sole reason, but I prefer not to spin that high again until I go forged).
I previously have run a TR230 & was spinning the motor to almost 7K & ended up smoking the motor (thats not the sole reason, but I prefer not to spin that high again until I go forged).
Originally Posted by 99Z28Guy
On the F11-F13, approx how high an RPM do you need to spin the motor to in order to hit max power before shifting????????
There's all his cam specs. Allan's cams don't need to run to 7k like the Trex and MS3. Well, not his smaller ones anyhow
the F13 is a great all around cam that won't tear up your motor and still make gobs of power all over the place. 
