kngkahious

iTrader: (1)

i've been looking for a decent set of head's and have looked around i still cant decide. there are these heads below then there are the patriot heads. the ported ls6 patriot heads but did'nt find any flow number's but found a good price $1,295.00 with 2.08 1.60 valves. i have also been looking at a set of afr 225's for $1,700.00 yeah there hunter's. just cant decide thought i would tose this out there and see what happened.


prc ls7 265cc $1,799.99
.200 161 114 169 119
.300 227 171 248 179
.400 291 193 308 211
.500 330 203 351 224
.600 351 209 383 235
.650 353 204 388 241
.700 353 209 393 246

prc ls7 280cc head $1,999.99

.200 161 114 171 119
.300 227 171 248 179
.400 291 193 309 211
.500 330 203 353 224
.600 351 209 385 235
.650 353 204 389 241
.700 353 209 403 246
.750 408 248


et performance 225cc $2,399.00

.100" 71 57 .100"
.200" 153 114 .200"
.300" 208 164 .300"
.400" 265 204 .400"
.500" 308 224 .500"
.550" 320 228 .550"
.600" 328 231 .600"
.650" 332 234 .650"
.700" 320 236 .700"





et performance 240cc $2,500.00

.100" 73 57 .100"
.200" 152 114 .200"
.300" 210 164 .300"
.400" 266 204 .400"
.500" 312 224 .500"
.550" 327 228 .550"
.600" 338 231 .600"
.650" 346 234 .650"
.700" 320 236 .700"


prc 2.5 5.3 heads $1,209.00


.300 208
.400 257
.500 290
.600 312

kngkahious

iTrader: (1)

i guess it all comes down to what you want to do with your car. i myself just want a fast all around real street car. i'd like to procharge it and make around 600 but i'm still trying to figure out if i really want to put that much of my money into my daily driver. it's either that or just a little spray.

Damian

iTrader: (89)

PRC and Patriot don't even belong in the same sentence as ET, AFR, TF, etc

As I've done with the last internal engine related questions you've asked, I will move this to the proper section in GEN III Internal. You will get much more response there than in the southern section

Jon@Texas-Speed

iTrader: (18)

I don't know that I would say PRC doesn't belong in the same sentence at all. That is a pretty ignorant statement from a sponsor/mod. To my knowledge you haven't bought a set of heads to compare a PRC head to any of the heads posted above to know how they compare. We have dyno tested several of these heads back to back and I think you would be pretty suprised at the results.

Back to the original poster, what kind or motor are these heads going on? What other mods are on the car. Shoot me a PM or post up some more details and I will help you get setup with a set of heads that will meet your needs.

kngkahious

iTrader: (1)

the car is bone stock right now. i only got the car recently about a couple hours ago. because i have been wanting to build a ls1 for a while. i'd like to build a d1 402 street car to be honest. i am seriously just considering a good n20 motor because of cost. i dont know that i am motizated enough for that much of an investment. considering i'm building a turbo/ n20 gsxr 1000 in a couple mts.

i've decide to buy all the basic bolt on's header's, full exhaust no cat's, intake ,ported tb , and all the other stuff. lookin at a cam but no real sense in getting that until i decide how i'm building the car. the tsp 233/239 has been a thought with spray until i get the motor done and ready to go in though. this car is a 2000 a4 z28 but i think i might just build a m6 car i'm getting in a couple mts. for a street beast but have this car for now.

kngkahious

iTrader: (1)

preciate it man i never know where to put these thing's course you allready know that you've had to move my last couple post's.

willyfastz

Was that the test were you did a base tune and then swapped a bunch of heads and only changed the AFR? Even some of the shops that still buy parts from you have said that was a useless comparison. Not all heads make their best power with the same timing as others. One head may need 28* of timing while the next may only need 23* of timing. So running all the heads with the same timing table was a flawed test.


kngkahious, what are you looking for performance wish and is this on a stock short block? I see you have some LS7 heads listed.

WKMCD

iTrader: (2)

You don't say what size engine or bore you're looking at. That will be important in choosing a head.

Damian

iTrader: (89)

Jon, I don't have any beef with TSP so don't take this as such, but calling my statement ignorant is ignorance in itself. PRC heads are known nationwide for their failures whether it be blowing out the water jackets or rockers doing cart wheels inside the valve cover. I've personally repaired two engines this year with PRC cylinder head failures. So judging from my personal first hand experience, I would not put PRC in the same league as a fail-free head like the AFR's or TF's. I understand PRC's quality control has been raised and they've made some revisions in the porting, so kudos to them. But until they have a proven track record of quality, I don't think they're gonna be ranked in the top tier regardless of how bad TSP wants them to be.

I was trying to be nice and not explain my reasoning behind my statement, but calling me ignorant because I spoke factual information is calling out the dogs for a bite.

Jon@Texas-Speed

iTrader: (18)

By no means am I denying that there have been bumps along the way to get the PRC cylinder head lines where they are today. But the same can be said for EVERY cylinder head company on the market. Both AFR and TFS have had their problems and the ETP heads seem to no longer be in business. Our heads may not be in the same price range as an AFR or TFS head but that doesn't exactly make them paper weights. Pricing on a CNC'd GM head will be much cheaper than that of a fully redesigned aftermarket head. We are working hard to get our aftermarket casting heads into production to compete with the cylinder heads above. We always welcome people bring/send heads to dyno test to the PRC so we know exactly where they stack up. Jason, Trevor, and everyone else work extremely hard to produce the best cylinder head possible and are always looking to improve on the performance of the PRC heads. There are several cars around the world running these heads with great results on both the street and strip. And lets not forget, the quickest stock bottom-end car in the country has a set of PRC heads on it!

I'm not really looking to get into an internet pissing contest or anything. Just kinds felt the way your post came off that you felt like the PRC heads were some low buck POS heads. That is simply not the case at all. If that's not how it was meant than I apologize but that is the way it came off to me.

Jon
Texas Speed & Performance

CriminiSS

iTrader: (16)

Ive had both PRC's 5.3 2.5's and currently have AFR 205's go afr and dont look back.

Jon@Texas-Speed

iTrader: (18)

kngkahious: Sorry to hijack your thread. For a stock bottom-end motor, you can not run a LS7 cylinder head. You would need a minimum of a 4.100" bore size to run that head.

What kind of budget are you on? How serious are you about putting a blower on the car? Give me an idea on what you are wanting to do with the car in the immediate future and I will help you spec out a heads/cam setup to meet your goals for the car.

firefighting1101

iTrader: (48)

+1 on the afr's ive personally seen a prc head failure. wouldnt waste my money on a set

kngkahious

iTrader: (1)

when i build my motor i'm not going to build the motor in the car. i will buy another engine build it and drop it in. as far as the ci's go i have been thinking about building a 402 or 408 the cost is just a little more then the stock cube. considering i will have to buy another block to build in the first place. i'll just buy i bigger better motor then i have now. they seem very streetable and make good power. i'm really liking the idea of a d1 on my car but is a few mts atleast down the road. so for now i'm just going to spray it until i decied where i am going. as the heads go i'm looking for a set i can use on both motor's and can get down to 9.5-9.8 cr. i listened to a wound clip of a ms4 cam it sounds awsome. way to big but sounds great with cut out's. if that help's you any.

the hijacking happens it is the internet , bro so dont swet it tsp!!!!!

also for what i have now i need a cam for this car with this motor i'll change(the heads)to the 400+ cube and put it in the m6. and the change this car to a drag only car.

kngkahious

iTrader: (1)

i think i will end up with the afr's there 72cc i think. and will work on both car's na/n20/blower.

Jessica

Don't you boys know you can't talk like that around here?????? You can't compare sponsors to one another, let alone talk bad about one!!!!!

Good question..... I wonder why you can't get a answer on that?????

Jes

Sales2@Texas-speed

iTrader: (5)

Actually, we've done more testing on the exact subject of the AFR/TFS/PRC/etc heads back to back SINCE then. We did dial in the tune each pull to get the max power from each combo (all tests with same mild camshaft and FAST 92mm intake). If anyone of you doubters wants to come down and witness the tests for yourselves, feel free. The results were very surprising! Just because we haven't posted the results for you to see, doesn't mean the tests haven't been run.

I've said it once and I'll say it again here and now: We do more testing on these engines on the engine and chassis dyno than most shops on this and other LSx forums (not arrogant enough to say that we do more than everyone, but more than most yes!)! While some might lay their claims based off one car that came through their "shop" that didn't make the results it should have for one reason or another, we do the testing and can say for sure which product makes what kind of power and how!

MPFD

iTrader: (5)

Right

Sales2@Texas-speed

iTrader: (5)

You can come down too! If you've never done the testing yourself, you really don't have anything to contribute to the thread or discussion.

TrickFlowTech

We have two engine dynos in house. We test every cylinder head from every major manufacturer-including the GM LS7 and L92. We also have an in house pattern shop with over 100 years of pattern making experience, and we do all of our LS head machining in house. Our heads are competitively priced, with US sourced castings cast from A356 virgin aluminum. We do not buy import castings made from recycled pop cans, and we stand behind our product 100%. We machine them on high quality high speed machining centers, use quality components like Ferrea valves, bronze guides, etc., and have experienced machinists and assemblers at our facility that do all the machining and assembly. Unlike other manufacturers, we make the patterns, machine the castings, cnc port them, valve job and assemble 100% in house.



I don’t claim we test more product than company XYZ because we, nor anyone else, knows what we test or anyone else is testing, or how much of it we do.



What I can tell you is that we probably have 3500-4000 dyno pulls on LS cylinder head and cam development, and we also durability test our product on a 98 Camaro shop car and other vehicles. Do yourself a favor before buying anyones heads-look around at what works well and makes power, and what service level the company provides. We believe we offer the best of all of the above and would love the opportunity to prove it to you.



Thanks

Trickflowtech