fastenoughls1

Kinda like the title says which head would give me better track gains matched with a gm hot cam?

The car is a 01 ws6 T/A with bolt ons and 3.73s.

MikeWS6

From what I have read the stg 1 ls6 heads make more up top and the 5.3's make more under the curve. Both should be within 5hp of each other. Ill be running the stg 2.5 5.3's with a 228R this spring.

HCI2000SS

iTrader: (2)

Do the heads cost the same?

BKsNHRA

iTrader: (4)

I don't think the heads are far apart in price. The stage 1 ls6 heads use 2.00 1.55 valves. They 2.5 5.3 heads use 2.02 1.57. I think the 2.5 5.3 head is a great head for the price.

427LS7HCI

I go with the Stage 1 LS6 heads

hiltsy855

iTrader: (35)

I called TSP and asked them the same question. Basically he said the heads are a toss-up, within 5hp. He didn't say which one would provide more hp but I assume it would be the LS6 head since the intake flows a little better. I went with the LS6 heads for upgradeability plus I didn't want to tell people I had truck heads on my Camaro LOL. I got mine through Tick since they were $75 cheaper.

hfthe3rd

iTrader: (1)

Are the 2.5 heads on tick the same as the ones TSP sells?

garygnu

the ls6 heads cost a little less and come with stock GM springs,which will work with the cam the OP has.

Jason 98 TA

iTrader: (4)

We have both in stock. I like the LS6 style heads, but you will be happy with either IMHO!

Pricing on all PRC heads are M.A.T. everyone sells PRC parts for the same price, or they will be removed as a vendor.

jrpimp00

iTrader: (17)

Had the 5.3 stage 2.5 heads and they gave a lot under the curve but seemed to run out of steam up top, could of been the 224r cam but it just seemed to stop pulling after about 5300

PREDATOR-Z

stage 2.5, yeah 5.3s I'll never make that mistake again.

JakeFusion

iTrader: (7)

I'd go with the Stage 1 LS6s...

hfthe3rd

iTrader: (1)

The 5.3s really are not that great? I'm very close to buying a set.

455GTO

iTrader: (18)

Meaning you would never buy those heads again? Do you mind elaborating?

LS1T56FTW

iTrader: (3)

Did you ever have the car on the dyno (AKA some real factual data)? My 228/232 cam/LS6 intake setup peaks at 6600 and the power did not die when I took it all the way to the limiter at 7000? If I keep the car and put my FAST 92 on it it will probably peak at around 6800, which is actually a little higher than I wanted.


I made 470whp on the setup mentioned above. Sure you can spend another 2000 dollars (installing a cam costs about $1200 when you are all done with valve springs, timing chain, etc. etc. and I spent 1700 on the TSP H/C package, so I considered the heads a good buy @ $500) and buy some Cartek heads like the Vette guy ended up doing, but when I put a FAST on my car and make another ~10whp more than him, I will enjoy that $2000 I just saved...

JakeFusion

iTrader: (7)

Is your 470 on a DynoJet or Dyno Dynamics?

hfthe3rd

iTrader: (1)

It's only a $100 dollar difference but I really wonder if ones better then the other (especially) matched up with the tourqer V3 which is what I have.

badazz81z28

iTrader: (6)

Yes, the LS6 heads are a better design. The 5.3s do perform well, but in equal combinations the LS6 heads will always make more power.

LS1T56FTW, are you saying you made 470 rwhp with 5.3s/LS6 intake/mild cam?

I call generous dyno BS.

T3X_SS

iTrader: (8)

I would have to agree with badazz81z28. Im currently running 2.5 Stg ls6 heads, Ms3 cam and i dyno'd 445Hp through an a4

torkls1

iTrader: (15)

Unmilled PRC Stage 1 LS6 heads vs unmilled PRC Stage 2.5 5.3 heads, the PRC Stage 2.5 5.3 heads have smaller chambers, thus creating more compression. More compression is more power. Also, the PRC Stage 1 LS6 heads have stock valves and springs...

In equal combinations I wouldn't say the LS6 heads make more power, but it's more of a wash. Personally I think you get more heads for the price with the PRC Stage 2.5 5.3's. Just my .02 cents.