SSwt00SS

iTrader: (18)

Mods are in my sig. Heads are: Patriot Performance Stage II Ls6 heads (2.02"/1.57"/59cc) I want to go to a bigger cam either a:

TSP 231/237 598/595 @112lsa or
TSP Torquer 2 232/234 .595/.598 @112lsa

Which one would give me more HP/TQ? Which cam is a more under the curve cam versus a peak power cam? I love the Comp224 i have now and wish to keep the nice fat, flat TQ curve that i have but just with a bigger cam.

I would like to know if i have to flycut for either cam to fit. I would like to hear from people what excatly it entails and if it is necessary. I just do not understand what it is for. I would rather ask a dumb question now, instead of having a 3300 lb paperweight after dropping a valve later. thanks.

Honda Hunter

iTrader: (8)

I cant see why you would have to flycut for them.

brad8266

iTrader: (23)

no flycutting needed.

All you do to flycut is cut into the top of the piston to make room for the valve.

teke184

iTrader: (5)

both of those cams are designed to work without having to flycut. now that is assuming you have stock-like or unmilled heads.

if you mill the heads alot...say more than .030 you may have issues with the piston to valve clearance.

both of those cams will probably yield the same results...assuming typical varaiation from engine to engine.

SSwt00SS

iTrader: (18)

thanks for the info guys.

teke...I bought the Patriot Performance Stage II Ls6 heads (2.02"/1.57"/59cc) assembled from them new. How do I tell if the heads have been milled over .030. Right now they are on the car exactly how i got them from P.P. thanks.

here is the link for them:
http://www.patriot-performance.com/w...05234&DID=1225

brad8266

iTrader: (23)

59CC, you are going to have to flycut.

Xtnct00WS6

iTrader: (8)

You have bigger valves than stock, so there's a good chance you'll have to fly cut with a 59cc head. Just make sure to measure. I doubt you'll be within spec though.

SSwt00SS

iTrader: (18)

thanks, i should have posted up all the info in my 1st post to avoid the confusion i caused. i posted while still looking for the link :doh:

brad8266

iTrader: (23)

yeah an LS6 head with 59CC has already been milled a lot. I have 57CC with -2cc cut into the pistons and it still was very close. You will want to cut about .100 into the pistons.

00BlueTA

iTrader: (8)

I ran this cam on stock heads and had to do no fly cutting, but I heard on the patriot heads have less clearence than the stock ones.

70LS1Nova

I just put in a T-Rex this weekend. Here's a pic of the flycut on the piston.

SSwt00SS

iTrader: (18)

thanks brad8266. i am glad that I have some people to finally give me some answers so i'm not in the dark. all the reading i did told me there was no reason to flycut. now i know why i need to in order to go with a bigger cam.

i guess my only question now is, i have a Comp 224/224 .581/.581 @112lsa now. am i having valve slap now w/this cam? i seem to have a lot more 'chatter' now since i put these heads on a month ago. i would be more than happy to take/post a video of what i am talking about. i was told i would have no issues with that cam so i went ahead and put the heads on. have i royally screwed myself?

SSwt00SS

iTrader: (18)

awesome, thanks for a visual reference...

brad8266

iTrader: (23)

Your pushrods length can be causing this noise. Did you change the pushrods? What size pushrods do you have in there right now? What thickness head gaskets are you running? Since you have milled down heads and a cam it is harder to give you an idea of what size rod you need. Your best bet is to buy a pushrod checker from Thunder ($20) and actually measure the proper length that you need.

SSwt00SS

iTrader: (18)

yeah, i swapped out the pushrods to Comp poly 7.4" PR's

as for the thickness i would need to call P.P. and ask, I don't remember the thickness off hand, used the gaskets that came with the heads...eerrr

i know what im doing when working on cars (i have worked on them for 12 years), but getting wrong info even after asking and getting pointed in the wrong direction by others is frustrating (not anyone here, i'm actaully getting help and advise here), but i talked to P.P. before getting the heads, etc and they said they would go right on, no problem, even after telling them all the mods done to the car...

brad8266

iTrader: (23)

Just flycut the pistons call it a day, especially because even if it clears without cutting, it wont be within the margin of safe clearences anyway. Look at my sig for my cam size/heads size and piston relief. Even with that it still was close.

SSwt00SS

iTrader: (18)

appreciate the help and info brad. i will get the pistons flycut when i put the new cam in, in the near future...

teke184

iTrader: (5)

something else to look into...

i've heard that patriot doesnn't mill their heads to acheive the lower chamber size. they weld up the stock chamber and re-machine them to make 59cc.

may want to look into this.

it's new info to me so i'm not sure exactly what all it entails.

but the extra chatter could still be pushrods...even if you put new ones in, they may not be correct.

i would suggest just test fitting the heads and checking for clearance...you may be pleasently surprised. you could also install a thicker gasket and gain some room.

SSwt00SS

iTrader: (18)

i called Patriot and the gasket thinkness is .052"

teke, you are correct, they do 'weld up' to make the 59cc chambers. i asked them if i had to flycut my pistons if i go with a Torquer v2 and was told that they have many customers with that cam and have no clearance issues, and i would not have to flycut. they do recommend that the 'ideal' clearance should be .040" from valve to piston.

if i flycut my pistons i will do as brad suggested and go .100", if it is necessary...

brad8266

iTrader: (23)

They recommend .040 PTV clearence? I have seen many references(not just random internet chatter) that recommends .080 intake/.100 exhaust PTV clearences for your typical street motor. .040 with stock block is way too tight IMO. i would not want my PTVC to be the amount of my spark plug gap, . I guess .040 works though, but its too close for my comfort.