check my engine builders cam choice
01-07-2007, 12:55 PM
#1
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check my engine builders cam choice
I am a little worried it is to radical canyou guys reasure or tell me he is crazy........
tappet lift 313 322
valve timing @20 int open close
49 84
ex 91 51
duration @ 50 int 276 ex 284
lobe lift .4400 .4200
gross valve lift int .748 ex .714
lobe seperation 110.0
old cam was as follows
gross valve lift .661 .668
[email protected] tappet lift 291 297
valve timing open @50 int open close
15 59
ex 62 18
Dur @ 50 int 250 ex 260
lobe lift .3890 .3930
lobe sep 112.0
it took me forever to type this
tappet lift 313 322
valve timing @20 int open close
49 84
ex 91 51
duration @ 50 int 276 ex 284
lobe lift .4400 .4200
gross valve lift int .748 ex .714
lobe seperation 110.0
old cam was as follows
gross valve lift .661 .668
[email protected] tappet lift 291 297
valve timing open @50 int open close
15 59
ex 62 18
Dur @ 50 int 250 ex 260
lobe lift .3890 .3930
lobe sep 112.0
it took me forever to type this
01-07-2007, 01:13 PM
#2
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Re: check my engine builders cam choice
Is john force your engine builder
? tell us more about your motor,the cam seems humungous to me,obviously you must be running a large, high compression motor and your cam must be a solid roller. One of our in house cam experts will be able to judge it better but to me it sounds like a 7500rpm drag boat cam,Smitty
? tell us more about your motor,the cam seems humungous to me,obviously you must be running a large, high compression motor and your cam must be a solid roller. One of our in house cam experts will be able to judge it better but to me it sounds like a 7500rpm drag boat cam,Smitty
01-07-2007, 01:16 PM
#3
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Re: check my engine builders cam choice
Did your old cam seem too small? What rpm's do you want your power to peak at? How heavy is your boat,what is your cu inch and compression ratio,without this info we can only make a W.A.G. but it still seems like a big daddy drag cam to me,Smitty
01-07-2007, 06:42 PM
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Re: check my engine builders cam choice
540 just over 9 and a half to one comp dart heads jesel roller lifters and stud girdels j and e pistons, h beam rods .....It seemed a bit much for me to....Peak rpm around 5800 50 6000
01-07-2007, 08:59 PM
#7
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Re: check my engine builders cam choice
9.5 to 1 compression is not enough for that cam.
More like 12.5.
Thats a Drag Cam for sure.
More like 12.5.
Thats a Drag Cam for sure.
01-08-2007, 08:07 AM
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Re: check my engine builders cam choice
thats more cam than you need or want with that motor, My motor likes this. @50 269-276, lobe lift402-406. gross lift 683-690. lobe sep.110 in cl 108. @50 26.5btc cl 62.5abc . ex 70bbc 26atc. These cams are easy on valve springs. These are solid roller with a 4-7 swap and cast gear, i had them done at custom cams in etta ms. 662-534 4881. Brian
