Rise of the Phoenix

iTrader: (27)

Can someone educate me on the pros of running the F14 high lift cam over the non high lift F14. I'm not sure what the additional lift will do in terms of power/torque, but I assume it would increase it. I would also like to know if the F14 high lift cam will have less P/V clearence than the non high lift F14.

caseypryan

iTrader: (10)

max lift doesn't have much to do with ptv clearance. At max lift the piston is moving away from the valve

1964_442

iTrader: (5)

whts the benefit from a short duration high lift cam?
like the torquer V3 231/234 .643"/.598" vs the MS4. 239/242, .649"/.609" almost same lift but dif duration..

sorry for the thread hijack

KevinR

Duration is basically "how long" the valve is opened. The higher the duration #, the longer the valve stays open. Which does affect PtV clearence.

Rise of the Phoenix

iTrader: (27)

So would the high lift F14 cam have lesss P/V clearence then the non high lift F14?

KevinR

See post #2

KevinR

http://www.auto-ware.com/combust_bytes/camspecs.html

Pretty good article for ya.

JustAnotherLS2

This.

Rise of the Phoenix

iTrader: (27)

Gottcha. Thanks for the help. Tying to decide if I want the high lift one or not. How much on an increase in HP and Torque would I see?

JustAnotherLS2

Stock heads? Stock intake? Stock bottem end? Running Nitrous?
Either way, gains will be minimal at best, I would assume, and might affect the powerband, but thats its.

Rise of the Phoenix

iTrader: (27)

AFR 205 62cc heads, LS6 intake, stock bottom end and no nitrous now, but may in the future. I want to keep good power under the curve, so would the high lift cam produce more top end power as opposed to non high lift cam?

TooLateVTEC

iTrader: (2)

Call me crazy, but have you asked FUTRAL considering they spec'd the cam?

Gordon0652

iTrader: (4)

Great example: ME.
I wanted a cam that had mild lift and a nice duration, ran into PTVC problems... That will be fixed soon.

JustAnotherLS2

Honestly, I dont know. I would either contact FUTRAL, or Ed at Flowtech. That guy has endless knowledge of this.

+1.

The_Rizzle

iTrader: (4)

The same basic cam (duration) but with more lift usually will lower PTV clearance a little because the ramp rates are faster. It may not be proportional to the added lift, however.

The duration, given that valve lift is adequate, will shift your power curve. Adding lift only can beef up a power curve without shifting it in either direction, but can (but not always) make life harder on valve springs, and may reduce total rpm due to earlier valve float. It may cause lifter collapse as well if some of the combo hasn't been thought out well enough.

If you are diligent about checking for worn springs, and spec the whole combo out very well, the higher lift cam can get you power. Most times, however, and especially for mostly street use, the regular or mild cam lifts are a better idea.

Ethan[ws6]

iTrader: (13)

Lift isn't even that important once you get to .600 in my opinion. Heads don't flow much better after that.

garygnu

duration,lsa,ICL,lift ,this is what you look at for picking a cam.for AFR heads get a cam from Tony M. or Patrick -G.

brngrhd

short duration cams with big lift generally make more torque. same lift with more duration (when lope center lines are kept the same) will generally make a bit less torque but more hp and it will be higher in the RPM band. is with a high lift and same duration you will gain some torque

prjctSILVERKNIGHTy2k

sorry, but Lol

stock heads with upgraded spring, stock bottom end,
cam:
.580/.590
288/294
236/242 @ 050
114 lsa

am i running into clearance issues? my car is barely running and im lined up dot to dot.

180ls1

iTrader: (4)

more lift should make more power everywhere, it really comes down to maintenance/power trade off.