who on here is GOOD with SB cams.. I have a fairly
big roller in my 416 which is a street/strip rod
thats for DW... now its injected witha a Holley
Dominator.. it made 590hp on the dyno but this is a
260/270 @50 with .640/.640on a 105 lsa installed at
the same.. it lopes real hard and tends to load the
plugs at idle.. been thinking something smaller on
duration and a larger LSA.. or maybe one of the injection
guys can help me out.. was thinking about leaning it out
at idle... any help is accepted... now its a W-2 on pump
gas.. on the street it runs WELL on 87 octane... its 10.4
compression.. I have W-5s that will go that will give me
10.8.... I need 7000 - 7200 rpm... I hit 7200 the
other day and it was still pulling HARD... but this cam
was a 8000+ cam... I dont know if I can have this
reground to a wider LSA or not... just would like
to calm the lope down some and help the idle

Mike , not sure if you're interested but I have a custom ground EFI flat tappet solid for a 416" project that never got off the ground.

252/256 on a 112 lsa with .550 lift. I know it's not a roller, but it's brand new. I'd give it to you if you could use it.

Let me think about it Scott..was looking for more lift
like .600+.... these heads flow 310 at .650 or.700 I
forget which..... but I want to thank you
EDIT
I guess I could go 1.6 ratio on the intakes

Call Cam Motion and be done.

If you core is on a 105 right now, I don't know if it can be reground more than about 108-109. I suspect you want to be 111-112 and that's a long way to go from 105.

I can deal with a 109 lsa..and the duration Scott said
would be close, but I would like more lift for the heads
sounds like some calls are in order.. unless the injection
guys can help... people sure do look at it with all that
lope... but if I'm not on the brakes decent it moves forward on every lope

260-268@ .050 on a 110lca and stick it in 3-4 advanced....Don't know how much lobe lift you can deal with, I use several of Comp's lobes and know them quite well.

As long as you have at least .650 at the valve it'll make good power. With more lift comes more headaches...but I like to run .700-.750 on street/strip stuff if I can.
Brian

That's pretty close to my Comp roller, 263/271° @ .050, .711/.719" at the retainer, 108° in at 104°.

I tried to keep the lift down some what to keep the
spring pressure down also.. now it 265 on seat and
just over 600 at lift..it pulls hard to 7200 for
sure.. thats as high as I've gone so far

Are you running it closed loop at idle Mike?

I'm running a stone age Commander 950 Pro TBI on my 493 with a 248 @ .050 108 LSA and to get it to behave at idle/low RPM I had to set it to run alphanumeric under 1800 RPM. Idle is set at 1100.

Play with the idle fuel map in A/N until the idle is happy and let the AFR fall where it may.

Also add as much advance into the idle as you can to help clean it up.

You have a bunch more cam than I do but you should be able to coax it into some semblance of acceptable.

Kevin

Once it gets above 160* its a self learning system..
but I think I need to lean down the fuel idle..I have
it idling at 900-1000 rpm.. it might need to come up some
to help smooth out the idle... I'll have to plug in
the puter to see what the idle A/F is...I havent even
down loaded any programs yet .... I need to

Could you mill your heads, run thinner head gaskets or find another way to add a point of compression? That tends to smooth out the idle in my experience and a switch to premium pump gas should be easy enough and the better MPG will help off set some of the higher price plus more HP, sounds like the way to go to me instead of compromising the cam in some way.

Nope not gonna cut the heads anymore.. if I put the
W-5s on with the .024 gaskets that will move it up
right about 11:1...I'm cheap so it runs great on 87
octane with the W-2s at 10.4... should still run fine
on 87 with the W-5s..I'll race on 93 with either set
of heads.. its just the big overlap on this stick...
I have a 22cc dish cut in these pistons to get it down
to run pump swill

Did you call any cam people yet?

I was under the impression EFI would allow you to tune issues with fuel right out. Evidently, this isn't so.

I havent touched the injection yet..this is suppose to
be a self learn system.. but with all the over lap this
cam has I might have to help it and lean it down on idle..
above idle it runs great... since I first fired it up I
havent put the computer on it... I will in a day or so and
see what the fuel table says at idle... I'm sure its fat
with all the over lap.... I had other issues that came first
so now I can start looking at the fuel
EDIT
I have to down load the program thats in there before
I even talk to anyone

NOTHING is completely self learning.............

I would bet that if I didnt have this big overlap cam
it would have had zero problems and would have learned
it all that it needed... it doesnt even care if its a big
duration cam.. if I had a 110-112 LSA it wouldnt have any
issues... so big deal..I have to tell it what I want...on
a computer.. thats real hard to do

Some time tweaking the fuel tables will pay off nicely. There are some really good guys out there who can help you out if you are interested in paying for their time. I am using Chris at Performance Injection for my tunes. He knows what he's doing.

Super nice guy, a personal friend and a racer too... He's been spec'ing and grinding cams for a very long time.. Give him a call with your specs and requirements and see what he has to offer..

http://www.drcamshafts.com/

One of the guys here on the board was willing to
help but he needs to see a program.. I still have
to down load it

Don`t trip Mike just saying nothing is completely self learned EXCEPT for ignorance...........