Procomp Heads
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mikestang63
SN Certified Technician
Yet you still seem eager to take the gamble.
Roll the dice my friend....you can be the Stangnet guinea pig.
- Dec 19, 2010
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I have an acqaintance named Steven Hall that owns a machine shop and races stock class 60's cobrajet mustangs. He's well known in this area for port work and making stupid numbers out of stock heads and intakes... This guy really knows his stuff. His brother races stock class foxes and they do very well also. I asked him which cheap budget heads I could squeeze the most out of for a 393... Explorer heads maybe? He said nope. Buy some pro comps and bring them to me, they'll way outflow the gt40s. The kicker is he said, to buy them bare because the valves and hardware are total garbage. He said he had a line on valves made by a big name but repackaged for another company cheap. He built a set of heads for his brother's truck and said they were great. A lot of ppl on the interwebs talk bad about procomp, but if you know what you are doing with some work they can do pretty good according to Steven.
- Dec 19, 2010
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Here's a video of Steven racing his stock eleminator:
https://www.google.com/url?sa=t&sou...uoCwBg&usg=AFQjCNFuzm_3iCWcMZ9sHubVDevT4Wm8_g
https://www.google.com/url?sa=t&sou...uoCwBg&usg=AFQjCNFuzm_3iCWcMZ9sHubVDevT4Wm8_g
Yes.
They are great heads for the money when you buy them bare. I've been spending a lot of time reading up on the 351C heads.
Here's a good video about assembled heads in general. Check out the guys other videos. He does a lot of work with ProComp stuff.
View: http://youtu.be/LmVVoUT7Di0
Basically, the springs and valves are crap. The valve job is crap and a lot is left to be desired from the original castings.
Lots of guys have had huge problems running the assembled heads out of the box.
Buy some bares for like $400, clean them up and install your own quality valve train. You'll have some good running heads at that point for about $1,000.
They are great heads for the money when you buy them bare. I've been spending a lot of time reading up on the 351C heads.
Here's a good video about assembled heads in general. Check out the guys other videos. He does a lot of work with ProComp stuff.
View: http://youtu.be/LmVVoUT7Di0
Basically, the springs and valves are crap. The valve job is crap and a lot is left to be desired from the original castings.
Lots of guys have had huge problems running the assembled heads out of the box.
Buy some bares for like $400, clean them up and install your own quality valve train. You'll have some good running heads at that point for about $1,000.
- Dec 19, 2010
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squeak93
15 Year Member
This thread reminds me of when I took a gamble on Patriot Performance heads. Turns out I spend way more upgrading junk springs and porting then just buying a quality head to begin with.
Oh and the Patriot head ended up cracking on me and sending coolant into 3 cylinders.
Oh and the Patriot head ended up cracking on me and sending coolant into 3 cylinders.
- Dec 19, 2010
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And this very well could be the case here. When someone like Steve tells me something though, it gets my ear.. however I have no first hand experience with procomp. You can buy tfs 170s used for 7 or 800... but in the end with a valve job a good set of heads will be a grand.
squeak93
15 Year Member
Think of buying a cheap casting head like banging a chick you just met at a bar w/o a jimmy cover. Sure some guys get away with it but do you want to be the one to get burned?
For the record I've seen a few guys run Comp heads and have seen a set in person right next to the patriot heads I had, they "appeared" to be a bit better quality than the patriots. I have no other first hand knowledge other than "you get what you pay for".
Good luck OP. Let us know how it works out.
For the record I've seen a few guys run Comp heads and have seen a set in person right next to the patriot heads I had, they "appeared" to be a bit better quality than the patriots. I have no other first hand knowledge other than "you get what you pay for".
Good luck OP. Let us know how it works out.
Definitely want to see how it goes.
Let us know how you make out and keep a tally of funds expended.
I'm sure SOMEONE here is running these. Just have to wait for them to find the thread. I wish I had kept the ones I had.
Let us know how you make out and keep a tally of funds expended.
I'm sure SOMEONE here is running these. Just have to wait for them to find the thread. I wish I had kept the ones I had.
Well, if we're talking dollars and cents and bang for the buck here....you could pick yourself up a set of used higher end brand name heads for less than that and if need be have them rebuilt for just about that price and know you're running a quality head....rather than take the gamble on the Procomp's.
I'd like to see some real world performance and flow figures on a set of Procomps before I'd ever consider them over proven heads like Trick Flows, AFR's, GT40X's, Edelbrock's, etc.
If you are building the Bare heads, I'm not sure I see any "gamble".
An argument can be made that buying someone's used heads for $1,000 is just as big or if not bigger gamble.
What if their damaged, what if I never get them? What if their the specs?
I don't have a dog in this fight, I'm just stating that if you want to run ProComp or Speedmaster you need to a start with bare heads.
My interest lies solely with the 351C in which there is not a large pool of used Alumium heads to pick from.
Bare Heads :
AFD heads are $1,600, CHI are $1,890 and Edelbrok are $1,450.
From what I've read the Eddys are not great out of the box.
Bare ProComps which are CHI clones are $700.
Take this for what you will, but there is a set of Fox Lake stage 3 ported TW heads for sale locally for $800. Assuming they checked out (which could be easily done) that is a hard deal to beat.
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