I have the 2.3 5.3 heads right now and while they are performing great I feel they are the next bottle neck in my set up. How much should the PRC 215s give me over the 5.3 heads?

 

Knowing your setup might be helpful

 

My complete setup is in my sig. Is it not visible? If not its 102 mm CIA, ported LS2 tb, mamo ported fast 102, PRC 2.5 5.3 heads milled to 62cc, 222/230 111+1 cam, 1-7/8 headers, catless x-pipe.

 

Id prolly go with a bigger cam over the heads.

Im sure the PRC 215 are waaaay better overall. But surprisingly i havent seen much run those heads.

The 5.3 have performed well for lots of members on here.

 

In my opinion, the gain would not be worth the cost. I'd stick with what you have, or have your existing heads hand ported.

 

Gain isn't worth the cost, a bigger bump stick will lend you better results. A Martin@tick, patG, EPS, Brian Tooley, or Ed Curtis bump stick will get you the best bang for the buck results.

 

I wouldnt change a thing in that setup with the power you are making. Maybe look into a procharger w/meth if you want more power. 464rwhp is awesome for those mods and I bet the car makes power everywhere with that cam.

 

That's what I was thinking too. After seeing those numbers, I'd be thrilled with them considering those heads are budget heads.

 

You could just spray it if you want a cheap boost in power, otherwise I wouldn't even touch the heads

 

I might swap the cam for a slightly larger cam... but then you'd only pick up 10-15rwhp. The cost would be about the same as a cheap wet nitrous kit. And you could pickup 75-150 with that.

 

I'm not completely opposed to swapping the cam out also for a bigger but not donkey dick sized cam. The main reason for wanting to change heads is that the setup is a bit over 5 years old minus the intake. Would it be plausible to gain 20-25 hp with a better set of heads and say a 234/242 cam?

 

Yes. Your cam now is pretty mild, so adding 10 degrees of duration to intake/exhaust... it certainly won't drive as nice, but it will make more power. And the heads could definitely add to that. Although, I'm not sure the heads need a wide split. You might be able to do a 235/238 111 cam with the PRC 215s and make 480-490.

 

I went with the PRC 215's after researching & only seeing good things. I bet you would easily gain 20-25 hp going with the 215's & a bigger cam. I'd say slap the heads on & see what you gain.

 

What kind of numbers did your setup put down?

 

490 with a MS4/PRC 215s. Peaked at 6900.

 

Is your fast ported or stock?

 

That's pretty damn stout right there. If that FAST isn't ported, I bet with a good port job, 500 rwhp would be no problem.

 

I just started thinking about this again... if you go with the PRC 227s and something like the FTI Hellraiser 236/240 111, I think you'd hit 500. You can do the PRC 227s with a 60cc chamber and keep stock PtV clearance...

 

The FTI Hellraiser is 229/236 111 .631/.631

I think you mean the Streetsweeper.

 

Yes. That's the one. I had the duration right.