Cam Size
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Your question is similar to walking into a restaurant and asking "what should I eat and how much.
A cam is a tuning tool used to make your engine components work in harmony.
RPM, compression, tuning, intake manifold, cubic inches, cylinder head, exhaust, converter, rear gear etc are all inpouts that need to be established before choosing a cam.
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
Way more to it than that.
Your question is similar to walking into a restaurant and asking "what should I eat and how much.
A cam is a tuning tool used to make your engine components work in harmony.
RPM, compression, tuning, intake manifold, cubic inches, cylinder head, exhaust, converter, rear gear etc are all inpouts that need to be established before choosing a cam.
Your question is similar to walking into a restaurant and asking "what should I eat and how much.
A cam is a tuning tool used to make your engine components work in harmony.
RPM, compression, tuning, intake manifold, cubic inches, cylinder head, exhaust, converter, rear gear etc are all inpouts that need to be established before choosing a cam.
Burning Brakes
Joined: Feb 2010
Posts: 1,013
Likes: 2
From: California City Ca
I am hungry what should I eat.
LOL
I must agree What are you looking for more bottem end more topend and is a daily driver do want a rough or smouth Idel Ect
I like a semi rought mean sounding Idel but I can't do it I need to get by smog this all comes into play when picking parts for your build.
LOL
I must agree What are you looking for more bottem end more topend and is a daily driver do want a rough or smouth Idel Ect
I like a semi rought mean sounding Idel but I can't do it I need to get by smog this all comes into play when picking parts for your build.
Last edited by Marv02; Jul 25, 2010 at 10:36 PM.
Le Mans Master
Joined: Dec 2002
Posts: 5,270
Likes: 3
From: Seattle Area WA
From his other thread...
Are you worried the XFI280 is too much or too little?
Either way, you could probably pick up power with a tighter LSA based on Vizard's stuff here:
http://www.popularhotrodding.com/tec...ics/index.html
105 LSA, 270-285 duration based on the article above. Haven't heard of many runny cams with less than a 108-110 LSA though. I am no cam expert, but if you can use higher ratio rockers to drop the LSA down and go with a minimum of 108-110 if it is going to work. I would call an expert.
Eagle forged internals, Mahle flattop forged pistons, Comp Cams XFI280 230-236, AFR 195 street Eliminators, Comp1.6rr, BBK 58mm tb, 42# Ford Racing injectors, MSD ignition, EM long tubes, spec2 clutch, fidanza, 7 qt. pan. dyno says 412hp 
@ the wheels & 388# tq. Max torque at 2K - 6K. with decent street manners. Fun! No tickets yet (knock knock).
@ the wheels & 388# tq. Max torque at 2K - 6K. with decent street manners. Fun! No tickets yet (knock knock).Either way, you could probably pick up power with a tighter LSA based on Vizard's stuff here:
http://www.popularhotrodding.com/tec...ics/index.html
105 LSA, 270-285 duration based on the article above. Haven't heard of many runny cams with less than a 108-110 LSA though. I am no cam expert, but if you can use higher ratio rockers to drop the LSA down and go with a minimum of 108-110 if it is going to work. I would call an expert.
Last edited by USAsOnlyWay; Jul 26, 2010 at 06:47 PM.
Drifting
Joined: Aug 2000
Posts: 1,614
Likes: 0
From: Colleyville Texas
Your torque dyno numbers in your previous new set up thread seem low IMHO-388. Is this behind the cam question. ? Have same cam in my 396.
Last edited by Red Rocket; Jul 26, 2010 at 03:58 PM.
Le Mans Master
Joined: Dec 2002
Posts: 5,270
Likes: 3
From: Seattle Area WA
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Drifting
Joined: Jul 2007
Posts: 1,294
Likes: 37
The XFI280 is probably one of the best "off the shelf" street cams out there. ON What DO i BASED MY ASSUMPTION, YOU ASK?
Bret Bauer admitted that to me.
EFI get the jeebies when you throw tight LSA's at them. The XFI is engineered to avoid that while providing good all around power. It is a moderately sized cam with great street manners. And yes, the cam "talks" even with a 113 degree LSA.
Bret Bauer admitted that to me.
EFI get the jeebies when you throw tight LSA's at them. The XFI is engineered to avoid that while providing good all around power. It is a moderately sized cam with great street manners. And yes, the cam "talks" even with a 113 degree LSA.
Drifting
Joined: Aug 2000
Posts: 1,614
Likes: 0
From: Colleyville Texas
Melting Slicks
Joined: Mar 2002
Posts: 3,108
Likes: 126
From: S.L.C. UT
I think that is a nice streetable cam for your set up. More cam will give up bottom end and midrange to make more top end power. And depending on how much more cam you go, you may need more compression. I think you have a nice streetable combo right now. The other thing is big cams become less streetable. Sure you can drive them on the street, but they will wear on you with a rough idle, and cam surge at low rpm's. But to each their own. And more cam will raise your power band, which could create different problems.
Drifting
Joined: Aug 2000
Posts: 1,614
Likes: 0
From: Colleyville Texas
Racer
Joined: Mar 2007
Posts: 337
Likes: 1
From: dallas texas
when it comes to cam advice... my first call is ALWAYS to compcams. you tell them exactly what your setup is. rearend gear ratio and everything, so make sure you have the info. ive never gone wrong with compcams. 800-999-0853
i just realized i sound like a testimony advertisement
i just realized i sound like a testimony advertisement
