Hello all..

I guess I am just skeptical.. It has been my experience ( note I said MY EXPERIENCE ) that cam swaps for forced induction vehicles ( turbo and supercharged ) do not offer to much.. Unless ford really dropped the ball ( which they have been known to ) I am sure there is not to much more power to be had..

I know on a normally aspirated motor, a new cam can really make big power.. but it can have less effect on a motor that is allready having air stuffed into it..

This is just my 2 cents..

------------------
Got Boost ?
1999 SVT Lightning

 

Gee Mike, I wasn't giving away any of your secrets.

 

A 1/2 second or more from a cam is not realistic. That would mean the cam would produce roughly 50 hp or more.

Jeff

------------------
Silver 00
3/4 Drop
Snuglid
Stongard
Swanson chip
JL ram-air

 

Tim,
Did not want to expose anything but it was out at the Corral too and when I talked to Crane they said go right ahead and let people know. We have been waiting for these cams for a long time and the for the 4-valve ones too. Now I get to make use of my four valve heads. The other night I posted information on the Billet TB and the Powertube and when I first showed the photo it was not a turbo but rather the 4 valve manifold that I will use. Here is a wild notion for some of you. Did you ever think of running a T56 behind your Lightning motor? No you won't be power shifting but you don't have to live with a long-a$$ throw either.
Oh, yea check out the specs.

MIKE ;
GOOD AFTERNOON. THE FOLLOWING ARE THE LOBE MASTERS THAT WE HAVE MADE
FOR EITHER MOTOR ... THE LOBE SEPERATION ANGLE IS DEPENDENT ON THE
APPLICATION....THE LIFT IS AT THE VALVE..
SOHC
HR-211 /500
HR-217 /550
HR-219 /522
DOHC
HR-209/452
HR-217/474
HR-226/3937
HR-236/3937
THESE ARE ALL REGRINDS ONLY AND WILL REQUIRE LASH CAPS WITH WE HAVE
INSTOCK...

 

Ba...I dunno..what yo have up yo sleeve I gotty have a power tube mon... WTF..its only money..

 

I dontknow about the Crane cams for the Lightning,but for the R/T's they are the biggest waste of money, they are crap, and I hear you actually lose power from them, I dont know if its true, but I ordered one for my truck and cancelled the order after I herd how terrible they are and got a cam from Kammer racing, I havent put it in yet, but its goin in at the end of feb, along with ported heads, a polished and shortened intake manifold, and 52mm TB, I hear the Kammer racing cam will put your eyes in the back of your head, just lettin you guys know what I heard about the cranes

 

SY1999R/T

I think you are comparing apples to oranges, here. A bad cam grind profile is not specific to any manufacturer; it is an equal opportunity type thing. Even the best companies can screw up a profile with poor engineering and performance modeling. Hopefully, these new cam profiles are sucessful.

 

You are right, and I was not sure, thats why I posted it, thanks for the info..

 

Hello all..

I think the real question with the cams is going to be H.P. gains.. Pulling the motor apart and replacing the cams on this truck is no Saturday afternoon project.. Unless there were some serious increases ( 20+ H.P. ) across the band.. I would not see it as a worthy effort..

but then again.. some of you might..

------------------
Got Boost ?
1999 SVT Lightning

 

half a second souns reasonabl to me,when I was running a 15.1, sad, i was told by a the who sold it to me, and a few oth R/T owners who have the same cam hat it woud put me in mid to low 14's, the time slips dont lie, its producing 50 hp or more

 

The way I understand a regrind is that the base circle of the cam is ground down, which results in the peak of the lobe being higher. Then you can grind the peak to the desired lift and duration.

BaBolt, what are the stock specs for our cams? Anybody have these handy?

------------------
Jim
Black '00
#1,757 built 3/30/00
Clear corners
J.L. Street program
J.L. Stage II ram-air
MagnaFlow Exhaust

 

gforce,
Yes to what you stated. You can also select the lobe seperation. You need the lash caps to get the new geometry correct. I do not have the stock cam specs. handy but will get them and Crane has them too. Depending on cylinder head choice you may want to be selective with the cam that you start with. Most production cams have pressed on gears.

 

Thanks, I didn't think of grinding the whole base circle down. That would explain the required lash caps. It still doesn't give them much to play with, but for most streetable applications you wouldn't want to change it too much.
Anybody know what the stock cam specs are? I'd like to plug everything into Desktop Dyno and see what some cam changes will do.

------------------
Mark
'00 Lightning
'79+ Corvette

 

Well since the cam is going to make 50hp I suppose the ported heads will give you another 50, the ported intake another 30 or so. If you believe a cam by itself will give you that much power you deserve to get your money taken.

Jeff

 

A hi-po engine is a "package" of go-fast parts. Hopefully, if you've done it right, the parts compliment one another and make power. More air and fuel in, more power out. The cam is the "brains" of the engine and the rest can't contribute if the brains are lacking. Yes, I believe if done correctly, the "package" you mentioned could easily make 130 hp.

------------------
Jim
Black '00
#1,757 built 3/30/00
Clear corners
J.L. Street program
J.L. Stage II ram-air
MagnaFlow Exhaust

[This message has been edited by gforce (edited 01-25-2001).]