Help with compression!
from the looks of it you joined the forum this month. pred z is a very smart gentleman, especially when it comes to cams. he knows his grinds. if you do a small search you will see there are quite a few gentleman running cams that he specd. He was trying to correct what you were saying, but alttile advice. for every .006 a head is milled that is = to 1cc.
Staging Lane
Joined: Oct 2009
Posts: 78
Likes: 0
From: Scottsboro,Al.
Yes I know this if you would READ what I stated .018 would land his right as stock heads are 66.7cc milling .018 which is very popular would give him the same as PATRIOT 64cc.How hard is it for every1 to comprehend if he finds how much HIS HEADS HAVE BEEN MILLED THATS A SURE ANSWER TO WHAT CC TO GO BACK WITH MINUS ALL THE OTHER INFO THATS BEING PASSED AROUND PERIOD.Now go go back and read everything I wrote and quote on that!Have a nice day.
Staging Lane
Joined: Oct 2009
Posts: 78
Likes: 0
From: Scottsboro,Al.
from the looks of it you joined the forum this month. pred z is a very smart gentleman, especially when it comes to cams. he knows his grinds. if you do a small search you will see there are quite a few gentleman running cams that he specd. He was trying to correct what you were saying, but alttile advice. for every .006 a head is milled that is = to 1cc.
Staging Lane
Joined: Oct 2009
Posts: 78
Likes: 0
From: Scottsboro,Al.
from the looks of it you joined the forum this month. pred z is a very smart gentleman, especially when it comes to cams. he knows his grinds. if you do a small search you will see there are quite a few gentleman running cams that he specd. He was trying to correct what you were saying, but alttile advice. for every .006 a head is milled that is = to 1cc.
you were calling out a guy that has a ton of knowledge. i wasnt trying to make it look like you were stupid, i was trying to make you aware that pred knows his stuff. btw i dont care how long you have worked on vehicals, its just funny you can tell who is young and doesnt understand forum talk.
Using your logic, I guess my setup is impossible.
stock LS1 bottom end
5.3 heads milled .025" by TEA (59cc actual volume), 2.02/1.55 valves
.040" Cometic gaskets
less than 2cc of valve relief
240/244 .609/.614 111 lsa cam.
That put me at about 11.6:1 compression. Actual measured p/v clearance is more than the typical "safe" recommendations of .080/.100"
Since you wanted to hear about results, well it sees 7k rpm quite often, and it's run flawlessly the past 3 years since I put it together.
Staging Lane
Joined: Oct 2009
Posts: 78
Likes: 0
From: Scottsboro,Al.
Guarantee, huh.
Using your logic, I guess my setup is impossible.
stock LS1 bottom end
5.3 heads milled .025" by TEA (59cc actual volume), 2.02/1.55 valves
.040" Cometic gaskets
less than 2cc of valve relief
240/244 .609/.614 111 lsa cam.
That put me at about 11.6:1 compression. Actual measured p/v clearance is more than the typical "safe" recommendations of .080/.100"
Since you wanted to hear about results, well it sees 7k rpm quite often, and it's run flawlessly the past 3 years since I put it together.
Using your logic, I guess my setup is impossible.
stock LS1 bottom end
5.3 heads milled .025" by TEA (59cc actual volume), 2.02/1.55 valves
.040" Cometic gaskets
less than 2cc of valve relief
240/244 .609/.614 111 lsa cam.
That put me at about 11.6:1 compression. Actual measured p/v clearance is more than the typical "safe" recommendations of .080/.100"
Since you wanted to hear about results, well it sees 7k rpm quite often, and it's run flawlessly the past 3 years since I put it together.
That's because you apparently don't understand the concept of valve reliefs.
Without them, I'd have (-.010") p/v clearance. Minus, meaning interference, direct contact, no clearance at all. About the same as what you might predict.
With .100" deep notches cut into the pistons, I now have .090" p/v clearance. Since the notches were cut at the same angle as the valve, every .001" of depth cut is .001" of p/v clearance created. Funny how that works.
OP, sorry for the mini-hijack.
Without them, I'd have (-.010") p/v clearance. Minus, meaning interference, direct contact, no clearance at all. About the same as what you might predict.
With .100" deep notches cut into the pistons, I now have .090" p/v clearance. Since the notches were cut at the same angle as the valve, every .001" of depth cut is .001" of p/v clearance created. Funny how that works.
OP, sorry for the mini-hijack.
Staging Lane
Joined: Oct 2009
Posts: 78
Likes: 0
From: Scottsboro,Al.
That's because you apparently don't understand the concept of valve reliefs.
Without them, I'd have (-.010") p/v clearance. Minus, meaning interference, direct contact, no clearance at all. About the same as what you might predict.
With .100" deep notches cut into the pistons, I now have .090" p/v clearance. Since the notches were cut at the same angle as the valve, every .001" of depth cut is .001" of p/v clearance created. Funny how that works.
OP, sorry for the mini-hijack.
Without them, I'd have (-.010") p/v clearance. Minus, meaning interference, direct contact, no clearance at all. About the same as what you might predict.
With .100" deep notches cut into the pistons, I now have .090" p/v clearance. Since the notches were cut at the same angle as the valve, every .001" of depth cut is .001" of p/v clearance created. Funny how that works.
OP, sorry for the mini-hijack.
Staging Lane
Joined: Oct 2009
Posts: 78
Likes: 0
From: Scottsboro,Al.
That's because you apparently don't understand the concept of valve reliefs.
Without them, I'd have (-.010") p/v clearance. Minus, meaning interference, direct contact, no clearance at all. About the same as what you might predict.
With .100" deep notches cut into the pistons, I now have .090" p/v clearance. Since the notches were cut at the same angle as the valve, every .001" of depth cut is .001" of p/v clearance created. Funny how that works.
OP, sorry for the mini-hijack.
Without them, I'd have (-.010") p/v clearance. Minus, meaning interference, direct contact, no clearance at all. About the same as what you might predict.
With .100" deep notches cut into the pistons, I now have .090" p/v clearance. Since the notches were cut at the same angle as the valve, every .001" of depth cut is .001" of p/v clearance created. Funny how that works.
OP, sorry for the mini-hijack.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Frazierboy98
What is your deal? If you make a mistake in life, it is Ok to admit it. Continuing to argue about things we have done over and over again, does not add to your credibility or your intelligence.
Sit back and reflect on what you are saying, what more proof do you want?
What is your deal? If you make a mistake in life, it is Ok to admit it. Continuing to argue about things we have done over and over again, does not add to your credibility or your intelligence.
Sit back and reflect on what you are saying, what more proof do you want?
he must not have been loved as a child 
Thread Starter
Joined: Sep 2003
Posts: 813
Likes: 0
From: Harlingen, TX.
1) 2cc piston relief
2) 6.125 rods
3) 3.905 bore
4) stock gasket
5) ten thousandth out of the hole
He didn't know exactly how much my stock heads where milled but said my CR is about 11 to 1. Hope this helps guys.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Alright back on topic now. Spoke with LME this morning and this is what I got...
1) 2cc piston relief
2) 6.125 rods
3) 3.905 bore
4) stock gasket
5) ten thousandth out of the hole
He didn't know exactly how much my stock heads where milled but said my CR is about 11 to 1. Hope this helps guys.
1) 2cc piston relief
2) 6.125 rods
3) 3.905 bore
4) stock gasket
5) ten thousandth out of the hole
He didn't know exactly how much my stock heads where milled but said my CR is about 11 to 1. Hope this helps guys.
64cc will be ~ 10.6:1
Thread Starter
Joined: Sep 2003
Posts: 813
Likes: 0
From: Harlingen, TX.