MikeWS6

I know these will make the valve train louder but how will they affect the exhaust sound?

redtan

iTrader: (5)

Heads themselves won't have an effect on exhaust volume.

MikeWS6

Ok good cause after the cam it got real loud

z-maro

iTrader: (18)

I would think that the added compression will change the exhaust tone and could make it louder.

MikeWS6

Well hopefully it's not too much louder

mjs1012

iTrader: (36)

theyll make your exhaust louder because there will be more air flowing through the heads and through your exhaust.

MikeWS6

Makes sense. Hoping for a 30 hp gain

prokilllsx

Should be pretty close to that.

BigBirdLS1

Mike I can tell you from experience that those heads will change the exhaust tone. It will get a little deeper at idle and the part throttle and WOT will get louder. Btw I gained 38rwhp and 18rwtq from those same heads with a small 224R cam. You'll be happy I promise you.

MikeWS6

What were your numbers?

BigBirdLS1

Bolt ons and cam only it made 407/402. I changed nothing but added tsp 2.5 5.3 heads and made 445/432. I was suprised at the numbers for sure, but it runs mighty strong.

MikeWS6

Does it feel a lot stronger under the curve?

BigBirdLS1

It definitely feels stronger under the curve...when I get traction. And now my OEM clutch just slips.

BigBirdLS1

The throttle response feels better too. The added power was everywhere not just at the top of the rpm range.

MikeWS6

I have a new napa clutch lol

cant see it lasting long

BigBirdLS1

If your car hooks it won't last. My clutch lasted ~12k miles of stock power then not even two passes at the track...lol

MikeWS6

Do you also still have the 10 bolt?

BigBirdLS1

Yes I still have the 10-bolt. Now that my clutch isn't the weak point it probably won't last long. If I get one good pass at the strip and then it breaks I won't complain at all. Lol

LittleJohnson

iTrader: (1)

I have a 5.3 motor out of my truck that got totaled I was thinking about getting the heads worked to put on my LS1 does anyone know if TSP will cnc my heads and send them back a good bit cheaper than buying theirs outright?

MikeWS6

Update. Gained 48rwh and 21rwt