mnypitZ

iTrader: (19)

I am looking to start picking up parts to do a cam swap. My question is, what cam do you all suggest I use? I am looking for a moderate cam. A little lopey and max hp. I dont want to lose any of my bottom end power, but also do not want to lose any of my allready poor traction. IT is a 98 Z28.

Here is what I have allready, Pacesetter LTs and ORY, CCed heads skimmed about 30 thousands(no flow numbers because I got them used with a fresh valve job and what look like Ferrea valves and 918 springs), Unknown catback, but seems to flow well(looks like a dynomax), lid, LS6 intake, and a light tune.

I am looking for numbers over 400rwhp. Driveability is somewhat important, but it is an extra vehicle so as long as it is reliable I am happy.

Also, what all should I also replace at the same time? Oil pump, water pump, timing chain, underdrive pulley etc etc etc??

Thanks in advance
John

PREDATOR-Z

All you need to know about rquirements fo a swap is in http://www.ls1howto.com

Since you milled the heads and they have bigger valves, I would go with 218/224 .590/.605 112+2 LSA (XFI cam)

That will fit the criteria you are asking for.

mnypitZ

iTrader: (19)

What kind of rwhp can I expect. I have read through the swap info and the specs they mention, but I am looking for real world numbers.

mnypitZ

iTrader: (19)

Anyone with some real person type advice? Someone that has tried differant cams and found that "just right" one?

PREDATOR-Z

This is your criteria:

That is why I recomended what I did. You have ported/milled heads with larger FERREA valves so you lost .050 PTV right there with stock gasket.

The cam I gave you will make the 400 you require and have massive low>midrange trq.
On a 98, i wouldn't spin past 6300 with those rods and bearings.

The 918s will handle the lifts shimmed. But I recommend a dual.

Otherwise, TR224 112 or one of the Crane/VINCI cams, you can find the specs on various ones on their site.

Like this one:

DUR @ .004" 278*/ 286*
DUR @ .050" 216*/ 224*
LIFT .551/.551
OVERLAP 57*
LSA 113*
"THE BOSS FOR STICK SHIFTS" " THE BOSS 113"
STREET / STRIP CAM
POWER RANGE 2200 TO 6400
TUNING & STALL CONVERTER REQUIRED
GREAT MIDRANGE
POWERFUL CHOPPY IDLE

mnypitZ

iTrader: (19)

I am not sure how to read those specs. Why does it say at .004 and then at .050? What does that mean? How important is the overlap and lift?

I was thinking of something in the 228 range with a 112 LSA. How would that change from the 224?

Thanks again for the info. I am just cam stupid.

LS1rulz

iTrader: (1)

I doubt you'll fit a 228 on a 112 under those milled heads, with those valves. Have you begun to notice a pattern yet? Everyone is telling you those valves are not a good choice.

PREDATOR-Z

It is not the valves but the distance from the piston to the valves once they are open

LS1rulz

iTrader: (1)

No joke.
Thicker valves (Ferrera) = less PTV clearance = sucks my *******

mrr23

iTrader: (3)

this is one of the cams i mentioned to john (mnypitz). this is the cam that put 400 rwhp in the Project AFR car that vinci did.
http://vincihighperformance.com/BECK...CT%20PAGE.HTML

also, i mentioned the XXX cam
http://vincihighperformance.com/CAMS...%20LS1%202.htm

mrr23

iTrader: (3)

those numbers just describe the camshafts duration (time the valves are open) at those amounts of lift off the cam. overlap is what makes the cam lumpy, to a point. the more overlap, the more time the intake and exhaust valves are open together. too much can allow the incoming fresh mixture go out the exhaust and not make good use of it.

lift is subjective.

mnypitZ

iTrader: (19)

OK Robert, we need to sit down and find out what will work with my combo, not what wont like so many seem to want to tell me about.

I will talk to you tomorrow.
John

mrr23

iTrader: (3)

see ya tomorrow.