I am thinking of buying some promaxx Patriot 185cc PN 2169 they seem to make good power and the price is not bad. Anyone have them?

http://www.jegs.com/i/ProMaxx-Perfor.../2169/10002/-1

 

I'm also considering these heads, I want to run them with a Holly Stealth Ram. I've been doing some research & I'm hearing alot of good things about them.

Search Promaxx Heads & then click on the web & images link, a bunch of info on them will come up.

 

Also found this thread....

Some good reviews & some bad...

https://www.thirdgen.org/forums/afte...nce-heads.html

 

and 3 pages worth of reviews on patriot hds.
https://www.thirdgen.org/forums/afte...iot-heads.html

 

i have the iron version of those heads PN 2151.

I really like them. No issues that i have not seen with any other big name head. Make good power through the entire RPM range with my XE274 cam

 

I will be buying them in about two weeks and I will be taking some good close up pics and checking them out real good.

 

Sounds great! Keep us posted!

 

After glancing through the 3 page thread that MMroc86 posted….they seem like a decent deal to me. A lot of suspicious posts by those that never tried them, but I look more at the posts of people that own them…and they all seem satisfied with them. They certainly look nice for the price!

 

Here are the pics of mine

https://www.thirdgen.org/forums/tech...eads-pics.html

 

I have these heads on another type of car. THEY ARE AWESOME! I'm a die hard believer in Patriots now. I was skeptical at first but after reading some reviews I went ahead and bought them. If I had to do it all over again, I'd do the same thing.

 

I have the angle plug version. Work and look great but spark plug access is terrible with SLP headers. Can only get compression tester hose into about 4 holes out of 8.

 

Got my heads in today and they look great just need a little clean up of some casting lines same as big name heads.

hear are some pics just let me know if you want to see a pic of something I didn't get.

 

more

 

and the last

 

The casting lines look worse in the pics then they do in person probably because of the shadows.

 

How aggresive a cam can be run with these heads & still have good street manners? Looking at the flow chart it looks like they flow well to .600

 

I have an XFI280, runs great but no full dyno test/tune yet.

 

This guy wasnt so lucky
Like anything else always have them checked out even the pricier brands.

http://forums.corvetteforum.com/c3-t...alve-seat.html

 

I was going to say that the shift on the intake port from top to bottom looked terrible, like they are not aligned properly when it was casted. Not saying they are bad but it makes me wonder if other details like the tolerance between the valves and valve guides are good.

 

I do they are ok but nothing great. They are weak on power numbers on my 360. IT runs 13.30 with 2.77 gear and 3640lbs with driver. Not bad for the money but better options now in 2019.

 

A bit of a necro on this post, but you don't mention what the rest of your setup is so it's hard to make a real judgement, but with a 2.77 rear gear I don't think 13.30 is half bad.

 

360sbc 638 Block. Flat top with valve reliefs 9.8 to 1 comp. Isky roller 217/225@.050 .485 .505 lift 112LSA. Edelbrock RPM air gap. 750 carb. Hedman headers and Y-pipe. 3 inch exhaust. Build 700R4. 2500 stall/ lock up.1988 Iroc T-top car,UMI rear suspension setup.Cooper Zeon RSA tires,stock size. Stock looking all original and 3360 lbs without driver.