Flow numbers for stock 98 heads

Reply Subscribe

Thread Tools

Search this Thread

Jan 1, 2007 | 11:41 AM

98ls1blackbird

Thread Starter

Staging Lane

iTrader: (5)

Joined: Dec 2005

Posts: 60

Likes: 0

From: Jenison, Mi

Flow numbers for stock 98 heads

Does anyone have any flow numbers for stock 97-98 LS1 heads. I bought a set of 98 CNC ported heads and was wondering what the gains in flow are. Hoping someone has some before and after numbers. Any help is appreciated. Thanks.

Jan 1, 2007 | 01:15 PM

66deuce

TECH Fanatic

iTrader: (1)

Joined: Feb 2004

Posts: 1,027

Likes: 0

From: Goshen,In.

Quote:

Originally Posted by 98ls1blackbird

i don't know the numbers,but they are real close to any other year..once ported,they'll flow just as well as any other year head..

Jan 2, 2007 | 09:17 PM

98ls1blackbird

Thread Starter

Staging Lane

iTrader: (5)

Joined: Dec 2005

Posts: 60

Likes: 0

From: Jenison, Mi

Anyone else?
I was hoping to find someone who had before and after numbers.

Jan 3, 2007 | 03:16 PM

98camaroLS1M6

TECH Addict

iTrader: (35)

Joined: Dec 2005

Posts: 2,373

Likes: 0

From: Cherry Hill, NJ

stock are 222cfm, not sure how much your ported one's are but I would guess 280s for a stage 2 98 heads, maybe a bit optimistic.

Jan 4, 2007 | 08:58 PM

98ls1blackbird

Thread Starter

Staging Lane

iTrader: (5)

Joined: Dec 2005

Posts: 60

Likes: 0

From: Jenison, Mi

I think it must be a stage 1 port job. The intake flowed 242 @ .500 lift with 28" H2O. The exhaust seemed quite good at 204. These numbers dont match the stage II PRC or the Patriot cnc ported 243 Z06 heads. This was a trade off for not having to buy new valve covers and coil mounts as these are perimter bolt. Thanks for the help.

Reply Subscribe