dankl

iTrader: (1)

I just ordered Bored LS6 heads from Patriot Performance (59cc)

The flow numbers are shown as:

.100" .200" .300" .400" .500" .550" .600"
intake 72 140 202 246 280 295 304
exhaut 65 124 160 196 220 226 229

Any suggestions as to what spec'd cam I should go with? This is gonna be a daily driver, engine has slightly over 80K mileage. LS6 intake and long tube headers, off road Y-pipe, cool air intake,...

rons 00z

iTrader: (10)

this is a new one. i wonder if anyone has asked this before

TXZ28LS1

iTrader: (5)

pretty good numbers!!

PREDATOR-Z

It all depends where you want your power range and for which purpose.

dankl

iTrader: (1)

looking for around the 1500-6500 RPM range probably. Its a dd, and will see very little track, if any... Trying to pull atleast 400 rwhp out of my set-up.

JPH

iTrader: (2)

NO need to go any bigger than .353 lobe lift.

dankl

iTrader: (1)

what about the Xtreme RPM XR269HR Cam from Comp Cams? Is this too small?

dankl

iTrader: (1)

the numbers on that cam are:
LIFT in/ex Dur@.050 in/ex LSA RPM Range
.525/.532 216/220 114 1300-6300

dshag

iTrader: (1)

https://ls1tech.com/forums/generation-iii-internal-engine/732392-recipe-500-rwhp-heads-cam.html
great article discussed things that might help

Old SStroker

Patriot should know more about these heads that anyone else. Not only do they know the flow numbers both forward and reverse, they know the velocities, MCSA, any places the ports stall, etc. IOW, they know the good news and any bad news about these heads. Therefore they should be able to provide you with the perfect cam for your application. That's their business...is it not? Why would you go anywhere else?

dankl

iTrader: (1)

thanks for the replies. I'll try calling patriot again tomorrow. I called before and they were just suggestion there cam, but I have to go with a comp cam because that is what my mechanic ordered. I think he went small, so I am trying to get the best cam I can for my application.

Old SStroker

Why are you asking here if your mechanic already made the decision for you and ordered the cam? Obviously you think he knows more than Patriot and anyone here about cam choice for your engine. Let's hope he does.

Make sure you tell your mechanic about this thread.

PREDATOR-Z

The reason you mech. went small is because you milled the heads to 59cc, that is a reduction of about .025>.030 piston to valve clearance not taking into account your valve size.
Going small he will have to choose a wider LSA to keep your DCR value under 8.7. Otherwise you increase your detonation issues and are forced to run premium all the time.

I cannot understand why poeple choose 59cc 243 castings without understanding that flycutting is needed for any decent sized cam.

dankl

iTrader: (1)

I appreciate all the feedback. I didn't want my mechanic to just order any old cam from comp. I think he just picked a smaller, mid-range cam and went with it without really looking into my set-up, but I'm not 100% sure. I can still swap the cam he ordered for another comp, as long as its still new. I think I am gonna try to swap for the XR-275 HR on a 112 degree LSA. Quick feedback will be appreciated, this swap may happen today, unless I here otherwise. Thanks everyone, you have all been a huge help, much appreciated!!