I was wanting to know what the best ported PI head is to use as far as quality and what they flow compared to stock? I do not want the new Trick Flow heads since I have PI specific forged pistons with valve releifs for that combination. Thank you!
Best ported heads for a 4.6 2 valve.
- Thread starter kbroush
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IMO ModularHeadShop stageIII's
Keith Stone
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Modularheadshop
Ive had great luck with my fox lake heads.
I've heard great things about Fox Lake.
Ive had great results with fox lakes as you can see lol
MHS or Fox Lake IMO
I was on Fox Lake's website and they did not have any information on them from what I could find. Does anyone know the flow numbers on a good ported head versus the trick flows? I thought a good ported head was close to the trick flow's out of the box. And that would be fine with me. Thanks for all the responses.
just get the trickflows...you dont need trickflow specific pistons due to the PTV clearence is more...so ummmmmm just get the trickflows.. the 44cc pistons will leave the compression about the same where its going to be anyway..
I see they also have the R series now that has bigger valves and more flow. It would be tempting to get those heads and a Tork Tech TVS 2300 put on top.
nice bump...
I have custom pistons with valve relief for stage 3 PI heads but ended up getting TFS trackheat 185's since I was told that livernois nor patriot had cores available to port and shipping was not an option there and back from California. I also didnt want to take the chance with used heads that would of needed more work, so, I just bought the TFS heads instead. The TFS heads are well worth it...the 3/4" deck will take a beating! You know incase something ever lets loose.
I have custom pistons with valve relief for stage 3 PI heads but ended up getting TFS trackheat 185's since I was told that livernois nor patriot had cores available to port and shipping was not an option there and back from California. I also didnt want to take the chance with used heads that would of needed more work, so, I just bought the TFS heads instead. The TFS heads are well worth it...the 3/4" deck will take a beating! You know incase something ever lets loose.
I am running the old SVO 4.6 2V castings from Ford Racing. It is a non PI head that I had ported to the moon and port matched for a PI intake. Stock it outflows every PI head. It came with revised intake and exhaust ports and larger valves. I had mine hand ported, and they outflow almost every CNC ported PI head on the market. I highly recommend these heads if you can find them. They also have a larger combustion chamber than PI heads, they are ideal for an engine with a built short block.
the r heads can only be use on like a 5.4 or big bore motor due to the size of the valves...and they still arent out yet lol...
Ah! I see. I did not know they required a bigger bore. The only reason I am not leaning towards the trick flow heads is because of my pistons. I have arias pistons that have valve releifs for the valve angles on a P.I. head so I am just afraid of running a big cam and the trick flows. I do have the good 8 thread heads on my car now so I thought about pulling them off over winter and getting them ported but just dont know if its worth it. I heard just doing light port work on the exhaust side makes a big difference as well.
you can run big cams with the trickflows and stock pistons because the head is total different design so takes alot to get PTV...a valve relief pistons isnt needed unless going with a big ass race only cam...
I know that the trick flow heads change the angle of the valves thats the only reason why im hesitant on getting a set. I had my engine built at a local shop a few years and the pistons that we chose were for the p.i. heads with valve releivs specifically for p.i. heads. Im just not 100% sure I can run the trick flow heads with bigger cams with my pistons. The top of the pistons I have are not completely dished like normal pistons. Where the valve releifs are there is raised areas around them and that might affect clearance. But like I said im not sure if that would even affect it.
What type of pistons are you running? I will try to find a picture of my pistons to show what im trying to describe about the raised area on the pistons.
I have diamond dished pistons with valve reliefs. I have a boosted motor and am only running 8.7-8.8:1 compression. So I want to say they are 16-17cc dished pistons.
here is a pic of them waiting to be installed
Installed
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