Help me choose a cam please
02-22-2005, 08:20 AM
#1
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Help me choose a cam please I currently have a completely stock car (check sig). In the next few weeks I will be putting some cash in the car. Cam and bolt-ons. This is what I want to do.
SLP Flo-pac (Lid, smooth bellows, filter, etc...)
Kooks 1 3/4" headers
Kooks Catted-Y
GMMG catback
Some kind of tune
I am looking for a Cam for this setup which will meet my needs. I am looking for a noticeable idle lope through the LT's and GMMG but not too drastic as to compromise streetability. I am willing to sacrifice some of the stock low end torque, but not too much. I want the torque peak to reside anywhere between 4500- 5000 rpm and get max power between 6000-6500. I guess I will need to up the rev. limiter to 6500? Will I need to upgrade the valvetrain with this cam? Help a newbie
SLP Flo-pac (Lid, smooth bellows, filter, etc...)
Kooks 1 3/4" headers
Kooks Catted-Y
GMMG catback
Some kind of tune
I am looking for a Cam for this setup which will meet my needs. I am looking for a noticeable idle lope through the LT's and GMMG but not too drastic as to compromise streetability. I am willing to sacrifice some of the stock low end torque, but not too much. I want the torque peak to reside anywhere between 4500- 5000 rpm and get max power between 6000-6500. I guess I will need to up the rev. limiter to 6500? Will I need to upgrade the valvetrain with this cam? Help a newbie
02-22-2005, 08:28 AM
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Yes a valvetrain update is needed (p-rods, springs/retainers, also timing chain and gaskets)
From the ranges you described I'd think a FM 13 would fit the bill.
From the ranges you described I'd think a FM 13 would fit the bill.
02-22-2005, 11:59 AM
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Originally Posted by PREDATOR-Z
Some poeple running G5x2 with 3:42's but 3:73 or 4:10's will benefit more.
That is how you make up for the loss of trq down low.
That is how you make up for the loss of trq down low.
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02-22-2005, 02:04 PM
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I looked at JimmyBlue's cam chart and I think I am going to go with the FM 11 instead of the FM 13. The 13 seems a little too big. Anybody have an FM 11 and any numbers or an FM13 and numbers for that cam?
02-22-2005, 02:41 PM
#9
I would not be afraid of cams in the 230 range; the loss of low end power is not nearly what you might think, and you gain a lot on the high end in exchange. You might lose 4 hp at 2000 rpm, but gain 40 hp at 6500 rpm. LS1's actually deal with radical cams much better than older engine designs did.
02-22-2005, 02:43 PM
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Originally Posted by PREDATOR-Z
Yes a valvetrain update is needed (p-rods, springs/retainers, also timing chain and gaskets)
From the ranges you described I'd think a FM 13 would fit the bill.
From the ranges you described I'd think a FM 13 would fit the bill.
What he said. 
