Visit The Dirt Forum for More Information

Author Topic:   cam specs
doowchuck
Member
posted May 23, 2001 01:06 PM
Can anyone tell me if this cam will work well in a IMCA mod? The engine is a 377 cu.in. on alcohol. intake exhaust
duration at .050 265 275
lobe lift .440 .410
lobe separation 102 106
seat dur. at .020 296 311
gross valve lift .700 .615

I would like to know if it is worth putting this roller cam in.
Thanks


sdhnc29
Member
posted May 23, 2001 10:54 PM
What size track , and what head are you using ?

Methanol engines generally like to see much less split in duration than what you are showing .

doowchuck
Member
posted May 24, 2001 06:56 AM
3/8 mile track and world products sportsman 2 heads.
thanks, john


KPLugnut
Member
posted May 24, 2001 08:30 AM
I have to agree with the first reply, too. That cam seems to be one designed for a class with a rather restrictive carb rule and favors the intake side quite a bit. Since you're not under a restrictive carb rule, and you're also on alky, you might make noticeably more power by not going with such a drastic split grind....something along the lines of 650-670 lift and about 250-260 duration @ .050 would work well for ya on a 106 lc.

Hope that helps,

KPLugnut

sdhnc29
Member
posted May 24, 2001 10:59 PM
I agree with KPLugnut . But unless you've had an extensive amount of port work done on your World Product heads , they will be dead on airflow much above .550-.575 lift . So if your heart is set on a roller , then I would look for a cam that is around .625 lift and about 255/256 @.050 w/104-106cl. Crower makes some very good book grinds that are close to these numbers . I think you will like the low end torque . But make sure you are up in the high 13's or low 14's on your compression ratio , this will also make a large difference .

I think that the cam you have now , will sound real good at the shop , but will be a dead player on the track .

doowchuck
Member
posted May 25, 2001 08:04 AM
Thanks for all the information. I guess I will trash this cam and follow your suggestions.
John


Back to the Archives