Well im switching to a 4bl intake,bumping up the cam,staying stock on the lower end. I have heard so much about porting the heads, that i thought (not knowing sqaut) maybe this would be a good move for my build. not trying to be the fastest, just a good steady runner with a lil punch. i would like to be able to light the tire on ocassion.
If you have an air compressor, pneumatic grinder, and a couple of grinding tips (real metal carbide tips, not the cheapo "stone" ones you get a Home Depot) you can port match the heads to your intake easily enough. These are very basic steps... Get new intake gaskets and trace the openings on the face of the head and intake with a fine point sharpie. Grind the port openings to match the tracing. If you end up cutting away much metal, you'll want to smooth the transition into the runners. Try not to go much more than an inch down into the runner and work gently - those carbide tips can quickly chew away the metal. I use the carbide tips for the initial grinding/shaping, then switch to a dremel tool with medium sanding drums to really smooth out the work. Will port matching make a "huge" difference...???...probably not in the grand scheme of things. But it's fun to do and gives you some ownership in the engine. Beyond that, if you want fast, easy, relatively cheap, extra power on demand: 150hp plate nitrous system.
I am not ready to go nitro, this basket case is being built for my wife. she already has a heavy foot. just looking for that lil punch i spoke of. as for the grand scheme,if it dont make that big of a diff- leave well enough alone. you know( don't fix what is'nt broke).thank for the info.
Man,it's your car so do what you want,but i'd either find a set of used afr's or just go with the procomp.
what I have heard is the valves suck. ever 1 says just put new valves in and go for the gusto.. Severalpeople uphear use them and have had great results.JM
pro comp heads we have used the pro comp heads and have had good success with them . if your looking for all out race head go to afr ortrick flow. but you you pay the piper for em. we first compared the pro comps to world products windsor senior heads on a 357 windsor. the heads were mildly ported , bowl work etc. the car ran a slow 8.30 et in 1/8th switched to out of box pro comp went 7.52 et in 1/8th.seniors cost 1200 dollars ..pro comps 600 dollars ..hmmm not bad for cheap junk. as far as buying usa made.. heck you cant find hardly anything that is usa made now. and it isnt me buying overseas stuff , its govt taxation on usa companies.anyways i always see where someone heard that someone said that someone had a set of pro comps and they were junk.. . im not gonna say they are anywhere near the best, but are a good head for money.not a full race head by any means, but good head and with some professional porting can hold thier own against some of the higher dollar brands. just my 2 cents worth. i say forget the gt 40's the pro comps will wax them we have ran the gt 40's also they are good heads just been surpassed by about every head out there now its your car and money do what makes you happy , thats what i do
How about this one? http://cgi.ebay.com/ebaymotors/Edel...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
i have bought procomp heads, too. i haven't built my engine though, so i cannot give you first hand experience. the place i got them from is an ebay dealer who was great to deal with: http://cgi.ebay.com/ebaymotors/SBF-...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories the auction sounds pretty convincing to me - especially the "assembled in the us" and the "exactly to your specs" part...
I will say I have never used them this is what I get from people over on a racing site. They are poorly made. The casting themselves are ok but the valvetrain is junk. If you plan to buy them buy them bare and put a quality valvetrain in them
I ran and still have a set of 200cc 60cc chamber Procomps that were on our 302. They bare castings were machined and assembled locally by a company called CGM machine. They also sell on Ebay. These heads were set up with 3/8 studs, with new springs to 550 lift last season. I had no problems with them, you get what you pay for. If I had to guess I would say they flow in the 210 range unported.
sorry to just but in, but how much of a hp gain are we talking about? (gt40, e7, procomp) and is that with a stock bottom end? what lifter mods and rocker mods are we looking at? again, sorry to but in. i am very interested in this and know very little about it myself
I have communicated via e-mail, dirrectly with Skip white of Whites Performance in Tennessee. They have an ebay store, and after compairing all the procomp head sellers, I would only deal Whites Performance. After speaking with Skip White, I have gained confidence in the Procomp cylinder heads. Skip doesn't puff them up to be something they are not. He will tell you that they are not the best flowing heads on the market. I don't believe the aluminum is t/6 heat treated. They assemble them from their own shop, with their own hardware. He said they use stainless valves that will not pull a magnet, as he says, the pre-assembled versions do, in fact, have inferior components, such as the valves that will pull a magnet, meaning they are not all stainless steel, and the heat range would not be what it should. He said they use their own springs and retainers also, but would tailor the springs to your particular cam. As I recall, they have a flow chart on their ebay stores site. He only recommended to me back in febuary, the 210cc versions. He went on to say how you can't trust evryones cnc program. Skip would even talk harshly of some of procomps other heads. He said bad things of the 190cc cnc versions. Skip said, they are not AFR or Edelbrock, but for the money, they are good. As I recall, they were about $800.oo shipped. You can easily pull other heads flow charts on-line, and compare them yourselves. But I say to you , do your own research. Don't take my word for it or anybody elses.
pro comps ive dealt with skip white also and he is good to deal with. depending on your build ..if your going all out race , buy afr's or trick flow, but for street or mild bracket car.. pro comps are fine. any head has to have the correct springs etc to your cam , go with what cam manufacturer suggests. must have correct spring installed hieght , seat and open pressure. etc. also any head needs cleaning when you get it , had a set of vics that were awful. took several hours just to get all the casting flash out. so no head is perfect . you most all time have to build to your application. elderbrock , trick flow or pro comp no exceptions.
