TVWilkes

Just finished a customers car with a Precision Race Components H/C package.The heads are Stage 2 5.3L heads with a PRC custom 225 camshaft.The following is a list of components that come in the cylinder heads

5.3L castings ( NEW )
PRC Dual springs ( .640 lift ) stock diameter,drop in
140lbs @ 1.800
PRC Titanium retainer
PRC seat bases
steel bodied viton seal
Ferrea 2.055 Intake Valves
Ferrea 1.60 Exhaust Valves

Here is a link to results of these heads.
https://ls1tech.com/forums/dynamometer-results-comparisons/208929-prc-225-cam-prc-stage-2-5-5-3-heads.html
https://ls1tech.com/forums/dynamometer-results-comparisons/207313-tsp-magic-stick-prc-heads-a4-dyno-results.html

The cylinder heads sell for $1529 outright, or 1329 if you supply the cores. The custom cams are $379.00.

jermstyle

very nice... what are the flow numbers on the heads? And intake runner size? Specs on the cam?

JF WS6

The 2.5 5.3's were said to be flowing 317 on the intake. Very nice.

jermstyle

What compression was the car running that put down 450?

gomer

iTrader: (13)

Unmilled 5.3's here, 63cc chambers 10.7:1.. probably a little less than that, I had flycut my pistons a while back.

jermstyle

Those are great numbers for such a smallish cam, and the torque is awesome.

Track times are a must! Any pics of the ports on these heads? And what is the intake port volume?

gomer

iTrader: (13)

LOL.. you should drive it on the street with that much torque and the 4.10's I gave a couple of local guys that are on the board a ride in it this past weekend.. maybe they'll post up about the way it ran.

I was rushed installing the heads so I didn't take pics of them, but Terry can make a few of some heads he has. As far as runner volume goes, I was under the impression that they were 215cc range, but don't hold me to that.. Terry can clarify that for sure.

m_donze

Yes, the torque is crazy. I drove it a few days ago and actually had my adrenaline pumping (been a long time since my cars done that). The car feels like pure power. Very street friendly as well. Don't be fooled by the numbers, that car feels a lot stronger than just 451rwhp . As soon as i do my cam swap I'm going with these heads

redc4

iTrader: (2)

Are these heads affiliated in any way with Patriot Performance??????

TVWilkes

No,they come from a company named Precision Race Components.

jermstyle

We need pics, track times and a sound clip.

Also, do you use a super 7 style locker?

Redlinez

iTrader: (5)

Awesome heads Terry. Does that conflict with the sale of Patriots? I'm not surfing as much as I used to. Do you have two businesses?

TVWilkes

At this time,super 7 locks are not used.Precision is looking into the super 7 locks.

WS-Sick

The car is FAST!!!! It's sick! Fastest car I have ever ridden in and that was with the cut-out closed losing about 20 RWHP. I have never been that surprised by brute acceleration! Me -->

p.s. Thanks, Scott. Now my T/A seems slow again.

TVWilkes

This does not conflict with Patriot,because I no longer work for them.I am fulltime at Racetech Speed.

CamaroCain

iTrader: (1)

hmm, i wonder how some LS1 or LS6 heads would do on my car verses the PP Race Heads??

FinalTA

iTrader: (1)

Very nice numbers! Is the cam on an XE-R lobe, or is it not Comp?

Redlinez

iTrader: (5)

Yea, I just found out. I guess I only surf when I have money because every time I get on here I see something else better than ever to go faster cheaper!!!! I wish you the best, I'm sure you're somewhat in a tacky kind of situation but apparently as I posted on another relative post, the power goes where you are!!! Too bad you can use 5.7 heads as cores.

Beast96Z

iTrader: (21)

I haven't heard anything about any failures. Can you elaborate some, seeings how I just bought some yesterday?

nick y

iTrader: (1)

HOLY CRAP!!!

who said bigger is better

that shows ya its all about volacity