Need info on Patriot 243s PLEASE
Need info on Patriot 243s PLEASE 
Long story short, I sold my car, bought it back 2 years later, and the guy sold the car to put these heads on there. I am now doing a ProCharger build, and would really like to know if anybody has a connection that could help me find out what cc and flow numbers these make. They are a 243 casting, and was told they are "Stage 3", but nothing is certain. The serial # from Patriot is 3394, I attached a pic. Anybody have a connection to help out? Or at least flow numbers on their CNC program?
Have you googled it? Most of us would have to, or you'd have to find a patriot head specialist that's been lurking on here for 15 years.
Judging by the silver spray paint those heads look to be "rebuilt". I don't normally see heads spray painted unless they went through some sort of cheapo rebuilder. Also the part number is stamped in there like a machine shop would stamp them, not usually how cnc guys number stuff.
Anyway, those heads are old old old. Gonna be hard to find info on them.
Here is a little bit
https://ls1tech.com/forums/generatio...heads-ls1.html
https://www.rpmoutlet.com/gtomclutch.htm
Judging by the silver spray paint those heads look to be "rebuilt". I don't normally see heads spray painted unless they went through some sort of cheapo rebuilder. Also the part number is stamped in there like a machine shop would stamp them, not usually how cnc guys number stuff.
Anyway, those heads are old old old. Gonna be hard to find info on them.
Here is a little bit
https://ls1tech.com/forums/generatio...heads-ls1.html
https://www.rpmoutlet.com/gtomclutch.htm
All my searches have come up to be a dead end. I was hoping there was somebody on here with maybe a connection to files from Patriot or some more insight on their stage 3 setup.
In the end I'm sure I will end up with a set of TFS heads, but for the time being would like to know what I'm getting into with these.
He told me these heads were close to 10 years old when he got them. He painted them himself along with everything else... Def not a reman from a machine shop.
They make good power NA, hoping to get to 850 wheel without issue.
In the end I'm sure I will end up with a set of TFS heads, but for the time being would like to know what I'm getting into with these.
He told me these heads were close to 10 years old when he got them. He painted them himself along with everything else... Def not a reman from a machine shop.
They make good power NA, hoping to get to 850 wheel without issue.
TECH Resident
Joined: Apr 2010
Posts: 926
Likes: 18
From: Central Texas
Try Alabama Cylinder Head, Patriot is the performance side of this company. When I was working in Birmingham I took a set of 243's to them for CNC work and their valve springs and valves. They had the Hass CNC machines and did a good job for me. This was in 2012 and I heard they lost their lease and had to relocate. Hope this helps.
There is no risk involved, as my build isnt centered on these heads... If I'm able to make 850 wheel with these, which is certainly possible, then Ill be happy. As of now, the plan is a set of TFS 245s and sell these, in which case I would still like more info so I can inform the new owner.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Do you know the combustion chamber size and CR to justify that there's no risk? I know a guy who had that thought process then found out shortly later after he had melted pistons that the engine's heads were milled down (don't remember exactly the cc's) and the motor had just under 13:1 CR. He didn't get nowhere close to 1 season out of a brand new engine, only a few hundred miles. Some take there chances and get away, and some waste a perfectly good motor.
I'm just asking, how do you know if the engine is safe to run, especially with boost, without knowing any info on the heads, CR, etc. ?
I'm just asking, how do you know if the engine is safe to run, especially with boost, without knowing any info on the heads, CR, etc. ?
Do you know the combustion chamber size and CR to justify that there's no risk? I know a guy who had that thought process then found out shortly later after he had melted pistons that the engine's heads were milled down (don't remember exactly the cc's) and the motor had just under 13:1 CR. He didn't get nowhere close to 1 season out of a brand new engine, only a few hundred miles. Some take there chances and get away, and some waste a perfectly good motor.
I'm just asking, how do you know if the engine is safe to run, especially with boost, without knowing any info on the heads, CR, etc. ?
I'm just asking, how do you know if the engine is safe to run, especially with boost, without knowing any info on the heads, CR, etc. ?
I understand, but again, my build isn't centered around these heads. I'm not going to put 16lbs into it and cross my fingers. With my pistons, figuring worse case CR with a 59cc chamber (smallest chamber offered), that puts me at 11:1. With the biggest pulley I can put on the Procharger I'll be lucky to see 6psi, and with E85 and good tuning there is no reason to be worried. Again, this is worse case. The plan isn't to use these heads, just purely curious to see what I'm getting into being that I won't be buying TFSs for another season.
Either way, I ended up getting the answers I needed. Glad to have it in case I sell them later on.
Out of curiosity where did you find the info?
Called Alabama Cylinder Head and spoke with a guy on the phone that worked for Patriot when they closed their doors, and still runs the very same machines and programs today. He said he couldn't 100% verify the chamber size (he said he was 90% certain its 64cc, could be 59cc), but could certainly verify everything else. I had assumed they were 59cc from the beginning, so being 64 would only be even better for me.
Called Alabama Cylinder Head and spoke with a guy on the phone that worked for Patriot when they closed their doors, and still runs the very same machines and programs today. He said he couldn't 100% verify the chamber size (he said he was 90% certain its 64cc, could be 59cc), but could certainly verify everything else. I had assumed they were 59cc from the beginning, so being 64 would only be even better for me.