Any ProComp Motorsports LS1 head users?
#23
OK... Here's the whole story about these Procomp heads. In a nut shell, they suck! I took them to have them flow benched, and to say they didn't come close to advertised numbers is an understatement. I took them to the same shop that have flowed other heads for me previously. They do alot of Pro Mod head work. How far off were they? Procomp claims 291/203 @ .600". These heads actually flowed 270/168 @ .600". The exhaust only flowed 174 @ .750"!. Max intake @ .700" was only 274! I was also told the valve job was terrible. The exhaust flow on these is actually WORSE than stock 241s. A 241 flows 198 @ .600" on the exhaust. These are going back and I'm sending my 241s to Lloyd Elliot. My advice is to stay away from this Procomp junk.
Frank
Frank
#25
I runs a set of cnc ls3 procomps , on a 408 and the car trapped 123 in the 1/4 full weight f-body. granted they were stock pc castings cnc'd by walker racing, flowed 360 at 600. I don't see why everyone always bashes them, especially when most have not even ran them. I know some have and have not had luck. But I really believe that number is much less than the ones who have had good luck.
#32
I'm not even seeing the real potential of these heads with the baby cam I'm running. You can't tell me 241/243s would be better even ported to the maxxx!. yall are crazy.
#34
11 Second Club
iTrader: (1)
I am not that up on the LS stuff but I do know there are heads/cam LT1 carS running near that, 350s with ported GM 23degree stuff.
I would expect more from a aftermarket head stroker LS.
Hell some of the porting programs for 243s have been tested better than CNC'd quality aftermarket castings
I would expect more from a aftermarket head stroker LS.
Hell some of the porting programs for 243s have been tested better than CNC'd quality aftermarket castings
#35
I would like to see that info, as far as after market ls3's and ported 243's are concerned. (no disrespect) and again, that a hell of a trap speed with a 2.6 60ft with a m6 and 3.42 rear. I can't even touch the throttle hard until I'm out of 1st and half way into 2. just lights up the tires.
#38
TECH Fanatic
All I can say is Ive run a lot of Procomp stuff, and I have no problem with there parts! There price is better than most. A lot of company buy there stuff stamp there name on it, and jack up the price! Just ordered cnc heads, and Hot Rod showed where they out performed AFRs. Also I have seen some high dollar heads come messed up, so Im sure they may have that problem just like high dollar parts! Ill try them if they don't do well it wont hurt as much as a 2500 set. I got friend that only shop at the mall for the name brand stuff, Im not that guy! Try it if you want!
#39
On The Tree
I have a set of the pro comp 3017 fully cnc 225 64cc bare no valve job heads (for 2.02 /1.55 valves). I have only just received these from speedmaster but I can tell you that mine certainly do not look anywhere near as bad as the ones showvette posted pics of. Mine look fairly decent. I have had tsp cnc heads before and even with them I still sent them to my cylinder head guy to hand finish them and flow them. These pro comp heads will be no different. For the price they are a good base to go on and for the extra couple hundred bucks , they will be hand finished to suit the lift of my cam.
The tsp heads flowed @566.4hp so be interesting to see what the PC ones flow.
The tsp heads flowed @566.4hp so be interesting to see what the PC ones flow.