biggest cam with stock springs ect.
02-08-2011, 10:24 AM
#15
3rd Gear Member
Join Date: Apr 2008
Location: Merritt Island, FL
Posts: 996
Depends on which stage 2 cams you get. For our cars comp has a couple of series of cams that have different requirements, and in each series there are different stages (the higher the stage, the more serious the cam). Check out this (http://www.compcams.com/Base/pdf/COMP5-124.pdf) and see what suits you. You probably want either a stage 1 or 2 XFI NSR (No Springs Required) cam or a stage 1 or 2 Thumpr Series cam (also NSR). VSR (Valve Springs Required) and SPR (Spring and Phasers Required) will require you to upgrade your valve train.
XFI NSR:
Stage 1 (P/N 127050): http://www.compcams.com/Company/CC/c...?csid=971&sb=0
Stage 2 (P/N 127200): http://www.compcams.com/Company/CC/c...?csid=972&sb=0
Thumpr: (requires phase limiters)
Stage 1 (P/N 127010): http://www.compcams.com/Company/CC/c...csid=1433&sb=0
Stage 2 (P/N 127020): http://www.compcams.com/Company/CC/c...csid=1434&sb=0
I have the ***** Thumpr (P/N 127020) cams, and I really enjoy them!
XFI NSR:
Stage 1 (P/N 127050): http://www.compcams.com/Company/CC/c...?csid=971&sb=0
Stage 2 (P/N 127200): http://www.compcams.com/Company/CC/c...?csid=972&sb=0
Thumpr: (requires phase limiters)
Stage 1 (P/N 127010): http://www.compcams.com/Company/CC/c...csid=1433&sb=0
Stage 2 (P/N 127020): http://www.compcams.com/Company/CC/c...csid=1434&sb=0
I have the ***** Thumpr (P/N 127020) cams, and I really enjoy them!
Last edited by JasperGT; 02-08-2011 at 10:29 AM.
02-09-2011, 10:16 PM
#17
6th Gear Member
Join Date: Jan 2008
Location: North Pole
Posts: 6,716
02-09-2011, 11:50 PM
#18
4th Gear Member
Join Date: Dec 2010
Location: CT
Posts: 1,472
Depends on which stage 2 cams you get. For our cars comp has a couple of series of cams that have different requirements, and in each series there are different stages (the higher the stage, the more serious the cam). Check out this (http://www.compcams.com/Base/pdf/COMP5-124.pdf) and see what suits you. You probably want either a stage 1 or 2 XFI NSR (No Springs Required) cam or a stage 1 or 2 Thumpr Series cam (also NSR). VSR (Valve Springs Required) and SPR (Spring and Phasers Required) will require you to upgrade your valve train.
XFI NSR:
Stage 1 (P/N 127050): http://www.compcams.com/Company/CC/c...?csid=971&sb=0
Stage 2 (P/N 127200): http://www.compcams.com/Company/CC/c...?csid=972&sb=0
Thumpr: (requires phase limiters)
Stage 1 (P/N 127010): http://www.compcams.com/Company/CC/c...csid=1433&sb=0
Stage 2 (P/N 127020): http://www.compcams.com/Company/CC/c...csid=1434&sb=0
I have the ***** Thumpr (P/N 127020) cams, and I really enjoy them!
XFI NSR:
Stage 1 (P/N 127050): http://www.compcams.com/Company/CC/c...?csid=971&sb=0
Stage 2 (P/N 127200): http://www.compcams.com/Company/CC/c...?csid=972&sb=0
Thumpr: (requires phase limiters)
Stage 1 (P/N 127010): http://www.compcams.com/Company/CC/c...csid=1433&sb=0
Stage 2 (P/N 127020): http://www.compcams.com/Company/CC/c...csid=1434&sb=0
I have the ***** Thumpr (P/N 127020) cams, and I really enjoy them!
Basically what could be done with cam choice is put more power in a usable power band or make the most HP in the very high power band where most of the time the car never is...which is very noticeable loss of HP during normal driving conditions. Does this principle still apply with the 4.6 3V? I will appreciate any advice?
02-10-2011, 08:14 AM
#20
3rd Gear Member
Join Date: Apr 2008
Location: Merritt Island, FL
Posts: 996
That's a lot of duration. Did you loose a lot of bottom end or did you gain? I'm learning on cam type for the 4.6 3V. I know from experience with the GM LT/LS motors you don't want a cam duration above 230 unless it's stroked to a 383 or more. The bottom end HP lose is great and effects daily driveability. So, when I see these high duration numbers on small cubic 4.6 inches I get a little confused.
Basically what could be done with cam choice is put more power in a usable power band or make the most HP in the very high power band where most of the time the car never is...which is very noticeable loss of HP during normal driving conditions. Does this principle still apply with the 4.6 3V? I will appreciate any advice?
Basically what could be done with cam choice is put more power in a usable power band or make the most HP in the very high power band where most of the time the car never is...which is very noticeable loss of HP during normal driving conditions. Does this principle still apply with the 4.6 3V? I will appreciate any advice?