Stock bottom end really has no bearing on cylinder head selection. That is more of a camshaft, compression , intake and exhaust consideration.

 

Thx for info, did not know that.

 

From what I understand the promaxx are decent. I’d like to see what the new as cast Afr heads are like, assuming anybody ever gets their hands on some.

 

I wouldn't count on any 2.02 valve 20° head fitting on the stock pistons without flycutting. It might fit, it might not.

 

Save more money .... Then buy the Twisted Wedge 170 FAC.

Just did a spring upgrade on a set for a customer's stock block combination. The castings are very nice. Bowl work after the valve job is excellent. No Chicom head can come close.

 

Are the supplied springs on the 170 FAC junk?

Sent from my SM-G981U using Tapatalk

 

I'm very haPPY W THE SET OF bLUEPRINT HEADS CASTING i BOUGHT.

 

The world's fastest stock block 302 car runs Promaxx heads straight out of the box.
Shocker 210 SBF CNC (Sold in Pairs) - PROMAXX Performance Products
I can't imagine their smaller 9175 model is of lesser quality and I recently bought a pair yet to be installed.

Local Sets New World Racing Record

Scroll down to Mark's 4 second pass videos. CTC thanks Promaxx and others in that post.
CTC Performance

 

I have sold a number of the ProMAXX heads. Yes, they are worth using.

 

I have 2 sets of Promaxx 210s on big inch Windsors. Could not be happier with both.

 

Someday I will figure out how to post pictures.

 

Are they on your computer or on the internet?

 

All I can comment on is my current situation with the flotek heads. This last spring I had an issue with the stock heads being warped. I was in the process of building a new motor for the car but needed it to be on the road as I planned on doing power tour etc so was in a bind. So I went with the flotek heads to put on a stock 302. This was a flat tappet motor with a carb. The flotek heads are only good to like .500 lift out of the box and the stock cam is way under that. I purchased them and they worked well, I didnt have any issues the entire year and put about 2500 miles on the car with them.
I was pleasantly surprised with the cost of them but I will say they arent going to make power like the other good heads out there. And would need Springs upgraded for a roller cam motor. They did give my car a little pep over factory heads and it ran about 5 degrees cooler as well, but it wasnt a Huge noticeable different in performance.

with that being said I also would sell these heads as I wont be using them on the new motor. I have some stamped stud mount roller rockers, pushrods etc for them that would go along with if youre interested.

 

AFR165's right out of the box bolted to a refreshed stock block, stock cam 5.0 gained a 100 horsepower. Afr's or twisted wedge heads are the only way to go. Cheaper heads need guide work and sometimes a valve job before you can use them. Edelbrock e heads are good to but are priced close the the afr's. Remember, cheaper really means that you will have to pay more later later

 

The machine work and 5 angle valves jobs of the Promaxx heads are done in Alabama. They also come with PAC springs. AFR is so impressed with the Chinese castings that they put their name, warranty and parts on them. Check out AFR's Enforcer line. Cheaper isn't always cheap.

 

Afr cast their own cylinder heads. Pro comp heads are known for their guides and seats coming out of the casting.

 

AFR does not cast their Enforcer series. Who mentioned Pro Comp?
You seem to know it all about products you don't own. Sounds like the typical internet hearsay to me.

 

I live in the st.louis area, and I've never seen promaxx, flotek or any other no name heads on people's cars. Mostly edelbrock, afr, rhs and other quality cylinder heads.

 

Does that mean people don't run them?

 

I mentioned procomp. How do you know what I own and what I don't?

 

Afr165 on a 289.

 

Never had the procomp simply because I've talked to alot of people that had problems with them. But I understand that no cylinder head is without flaws. I think that I will try out flotek heads

 

I bought the floteks for the fact they were cheapest amd I didnt find a whole lot of negatives about them. I took the chance and spent I believe like $750 with a discount code they had. Its also good to note the Edelbrock e street stuff is the same type of head, china casting and valvesprings only good for lower lift cams or flat tappet.

 

I hate paying out good money for something just to have problems with it. Murphys law follows me lol.

 

O'toole's commentary in Murphy's Law: "Murphy was an optimist."

 

I would get the ProMaxx heads instead. I noticed that Edelbrock upped the price of their Performer heads to equal to or more than Trick Flows which I see no justification for. The Performers are good, but not near as good as the 11r Trick Flow which is about the same price.

 

I agree they are over priced, But the Performers will bolt on to most stock blocks. The Trick Flows usually need fly cutting the pistons.

 

I admit that I know nothing about promaxx heads. How much are they for a sbf.The engine came with with afr165 heads, but sold the car and getting something else .

 

I bought them for $900 shipped right from the manufacturer during a 15% off sale. Look up part# 9175.

 

i had a valve seat fall out of my afr 205s that i bought new.so they all make good and bad sets.my engine builder sells alot of the floteks for people that cant afford trickflows or afrs.he upgrades the springs and says the castings are decent for the money.

 

Are the promaxx 9175 heads good for a daily driver? Not wanting heads with big intake ports, 160cc intake runner size is good enough for me

 

Those heads are 180cc, which would be a good choice for a hci build.

 

What is a hci build? Are 180cc intake runners to big for a 289/302?. The engine probably won't see more than 6 000 rpm

 

Head, cam, intake. No, 180cc isn’t too big - not even close.

Look at ls engines, they have 4.8L engines that came with 200cc cylinder heads. The whole thinking you need a small port to make low end torque is BS.

 

Never owned a 4V Cleveland, I see.

 

How much cam do you suggest? Since the plan here is for the car to be a semi daily driver and not wanting to spin the engine more than 6,000 rpm's.

 

Thanks for all of your suggestions, I looked into the AFR renegade series and that may be the way to go. Just a little over $1000 for both heads assembled sounds ok to me.

185cc SBF Enforcer Cylinder Head

Cylinder Head Specialists

www.airflowresearch.com

Anyone else have any experience with these?

 

Thanks for all of your suggestions, I looked into the AFR renegade series and that may be the way to go. Just a little over $1000 for both heads assembled sounds ok to me.

185cc SBF Enforcer Cylinder Head

Cylinder Head Specialists

www.airflowresearch.com

Anyone else have any experience with these?

You linked to the Enforcer heads but called them the Renegade series. Two different animals.