2000Z28AUG

I am wanting to install a TR224 camshaft, but I need some help. . . I have a concern that the TSP heads 2.5 Stage heads may be so much porting on a stock head that it might bring in reliability issues. PLEASE! If any of you are using these set of heads PLEASE lemme know what you think. I am debating with the AFR 205 66 (mongoose) heads or the TSPs. Thanks for all the advice up front. Both are good heads but even if I loose 5 rwhp b/c I go with AFR if they are more reliable then I would rather take . . . being mainly b/c my Z is a DD. Thanks

brad8266

iTrader: (23)

Stock heads can be hogged out with no problems, the TSP 5.3's are a well known head with good results especially for the price.

AFR's are awesome but youre gonna pay for them $$.

2000Z28AUG

but the main question is HOW RELIABLE? I will be using this as a DD. Thanks for the input.

01vetter

I have seen a few posts where TSP heads had some failures at the point where the cam supports were. It looked like they took to much material out in the porting process. From what I understand they have changed their porting process and are now taking a little less material out. I am also considering going to AFRs because of this.

99blancoSS

iTrader: (115)

This is a money decision and nothing more. If you've got the coin and want the best head for a 346 then you go with AFR's. If you want to save some money and get almost the same performance then you go with PRC stage 2.5 5.3's from TSP.
OR their stage 2.5 ls6 head shaved isnt a bad idea either. I've seen some good results there as well. Their new cnc program doesnt leave the rocker weak anymore

jimmyblue

iTrader: (11)

I just got done home-porting a set of LS6 heads I got
used, probably spent 15 hours on it (had the tools in
hand). I didn't go too extreme, just took out anything
that felt sharp and blended in the guide bosses without
a lot of material removal. I'd call it a "Stage 0.5" job but
no worries about weakening stuff or quality of welding
('cuz there ain't none).

Since a 224-range cam is not "***** out" neither do the
heads have to be, in my opinion.

BAKED

iTrader: (14)

I have a 224 listed in the for sale section if you need one.

I have the Absolute Speed Stg. 2 on mine and it made for a nice combo with the 224. I believe most people were making right at 400 rwhp through a m6 and a 10 bolt with this setup. Mine was going through a 9" and TH-400 but my car is light enough that it went 11.40 @ 120 on motor I think it went 7.27 @ 92 in the 1/8th

brad8266

iTrader: (23)

They are very reliable, TSP had an issue a long while ago that was a result of hogging out the ports too much which resulted in the head breaking where the rocker arm bosses are. This problem didnt happen to everyone and it was fixed a long time ago and replacements were offered from TSP. Their current heads have no problems.

99blancoSS

iTrader: (115)

It was also only on the ls6 head and never happened on the 5.3's to the best of my knowledge

99blancoSS

iTrader: (115)

You need to clarify your post. Your listing it as a TR224 but TR224's dont have .581 lift. They have .563 unless you had it custom ground.

brad8266

iTrader: (23)

You are correct. It was not an issue on the 5.3's, it was a issue with the LS6 heads.

brad8266

iTrader: (23)

A 224 .581 is a Comp XE-R lobe.

BAKED

iTrader: (14)

The numbers on the back of the cam read: LS13722R137229HR 14+2 CC Z9290 So I'd say you are right about it being a Comp. Sorry, I was just going off of what I was told by the previous owner.

2000Z28AUG

Sry I do not want a Comp XE-R cam, only the TR224 .563, my boy Jonathan @ Thunderracing has been fantastic help and I personally have seen and felt the difference in my brother's car. Don't get me wrong I love TSP as well and thats why I will prob. go with the 5.3 if everyone thinks the 5.3 Stage 2.5 would be reliable.

00 Freak

iTrader: (34)

I used a set of 241 heads that were ported and milled from Jantzer and they made great power for a DD and did awesome at the track. I' currently selling the heads w/ almost everything. Made 360hp and 336 tq unlocked TC and w/ cats. But at the track is where they really shined. 7.26 @93.75 mph.

SilverC5Vert

I made 420 RWHP with the mods in my sig and couldn't have been happier with the way the car ran with Livernois heads/cam. It was a DD and I never had any issues.

-Rick

john563

iTrader: (17)

Im an A4 and have TSP stage 2.5 5.3l heads and aTR224/112cam and ported fast and put down 417rwhp 407rwt.When I was just cammed with an LS6intake I did 350rwhp.I hope this helps you out
john

2000Z28AUG

well as far as I know the H/C package with the ls6 intake and ported TB w/ LT headers makes about a high 11sec. - low 12 sec. car. I have the FAST 90/90 so I might see about 10rwhp or 5rwhp difference. A buddy of mine with full weight makes a run @ about 11.7 on an A4 2000. Similar setup but he has underdrive pulley. My next question would be "does the underdrive pulley make that much of a drag racing difference?"

Ryan02SS

iTrader: (3)

My setup has been trouble free since I installed the H/C in 03. I DD the car alot during the nice weather months. Track times are leaving off idle with the stock 10 bolt and gears.

2000Z28AUG

I cannot wait to install 3.73 gears in this bad boy and see how well it runs.