jchapls1

I am looking at getting a tsp 224r 550 lift 114 lsa cam for my 02 auto ws6 trans am. It has ls6 intake, tsp 1 3/4 headers, ory, and 3200 278mm circle d stall. I am going to buy some stock 243 heads. I can get the 243s pretty cheap for $300, but they need rebuilding. I've thought about sending them to advanced induction and having their performance rebuild done for $595. This includes milling, grinding valves, and cnc competition performance valve job. I can also send them to texas speed and have there stage 1 cnc porting job for $750. I think the heads will have like 226cc intake runners compared to the stock 210cc with ai valve job. Which cylinder head service would be best to go with for a street/strip car and make the most power under the curve and torque? I thought the big intake runners hurt the low end torque vs. smaller runners.

30th t/a

iTrader: (51)

If those are your two options, hands down the PRC stage 1 CNC porting option.
The advanced Induction option has no porting involved.

BIG_MIKE2005

iTrader: (116)

I ran stock 5.3 heads milled, ported, polished with 2.0 intake valves done by Bo White, flowed awsome. My 224 cam loved the bump in compression.

HCI2000SS

iTrader: (2)

So an extra $150 you get porting done with PRC compared to AI....seems like a no brainer to me

tech@WS6store

iTrader: (2)

Tsp in that equation wins

wannafbody

iTrader: (2)

Just put the TSP/PRC stage 1 on my WS6 and they are killer. I'm still on the stock cam and untuned and they pull like a freight train after 2000RPM.

07NBSChevy

iTrader: (1)

I have had good results with TSP with fast turn around time, so leaning towards TSP.
Also, it might be best to get TSP's 224R cam with .600" lift over .550" lift for ported heads and your current mods. You will see better results from the higher lift, just my opinion tho.

tech@WS6store

iTrader: (2)

MOAR LIFT!!! Itll make more power anyway let alone on ported heads.

G Atsma

Unported heads are a tough call for a cam over .550. BUT even a Stage I port job?? BRING ON THE LIFT! The heads can cover that bet!

tech@WS6store

iTrader: (2)

Ill disagree there. If that were true the bigger cams and even most of the normal cams out there wouldnt make power.
A flowbench is not a gauge of how the engine operates, just a measure of how the head flows at a fixed position basically.
Engine dyno tells the tale there.

chrysler kid

iTrader: (14)

The 224 cam is a baby cam, maybe youre going to see 400rwhp with ported heads. Go with the 228 cam shaft, good heads and intake it could make around 420rwhp and be just as street able as the 224

farmington

iTrader: (14)

maybe 10 hp difference between 224 and 228 camshafts and its all on top.

G Atsma

Good points made! Agreed!
With that said, wouldn't ported 243 heads take far better advantage of a cam with lift of around .600" than unported?

tech@WS6store

iTrader: (2)

They woukd make better use of any cam really. Even a mild port job. For some big runner heads, keeping velocity up is the key to keeping the lower end and mid range, and that is where the school of thought on mid lift vs high lift differs esp most recently on exhaust.

99 Black Bird T/A

iTrader: (4)

Sounds likethe OP has a good plan. I would suggest a little more exhaust Duration for the cam. Say 224/228 unless the heads flow fantastic on the exhaust side.

I love the old 224/224 XE-R 113 LSA cam in my 99 Trans Am, it drives like stock unless you're creepiness uphill in a parking deck. M6 car.

My RS has an old 229/229 v2.1 MMS cam 114 LSA that is would be pretty fantastic as a daily driver cam in a stock cube Auto LS1 with a bit of stall.

Good luck with project sounds like a good fun car.

kinglt-1

iTrader: (26)

Fwiw Tony Mamo made 480whp with a 224/228 cam using his worked AFR 205's and a Fast 90. Guys get too bent on cam shaft specs. LS motors do not need a lot of cam to make killer power. The power is made in the heads and intake...valvetrain stability plays a huge roll too....228 is only 5-10hp gain tops over a 224r as mentioned.

99 Black Bird T/A

iTrader: (4)

Per TSP's website

"The 228R camshaft is a very popular camshaft for customers wanting a very streetable camshaft that makes approximately 5-7 more horsepower than the 224R camshaft. "

Dan45

iTrader: (6)

228 camy here. Mainly stock car, runs well! May bump up compression soon

chrysler kid

iTrader: (14)

So you guys are saying cams are the same price, go with a cam that is advertised to makes less horse power. Ok

G Atsma

It does not say that anywhere in this thread. What IS said generally is that sometimes a smaller cam will do a better job of making more power under the curve than a somewhat larger one, at the risk of losing a bit of peak power. Basically a "fatter" curve with not as sharp a point on the peak of the curve, if that makes sense to you.