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Apr 5, 2011 | 07:48 PM

#21

Rob Petyo

Le Mans Master

Joined: Mar 1999

Posts: 6,028

Likes: 84

From: Palm Coast, FL

an ls2 TB would be a big help for now

When you have the re tune, ask about the flow rate of the injectors

Apr 5, 2011 | 08:55 PM

#22

All_Motor_C5LS6

Drifting

Joined: Jan 2010

Posts: 1,447

Likes: 1

From: Katy TX

Quote:

Originally Posted by WKMCD

If your tuner told you that 1 7/8 LT's and 3 inch x-pipe drops your RWT reading....you seriously need to find a new tuner. I agree that the numbers are very low. I would expect that setup - even with the smallish cam for a 383 - to be closer to 470RWHP or so.

I agree. I can see losing torque with 3in exhaust and 1 7/8 headers on a 346 but not on a 383. I serious think he got a 346 and should pull the heads and measure the bores if he can't find his lost power.

Apr 5, 2011 | 09:21 PM

#23

Toxiclemonade

Racer

Joined: Sep 2009

Posts: 257

Likes: 0

From: Charleston SC

Something smells fishy here...you sure its a 383?

Apr 5, 2011 | 09:30 PM

#24

WKMCD

Race Director

Joined: Dec 2004

Posts: 13,760

Likes: 75

From: Haymarket VA

Quote:

Originally Posted by All_Motor_C5LS6

For a 383 he'd want to measure the stroke.

Apr 5, 2011 | 11:56 PM

#25

All_Motor_C5LS6

Drifting

Joined: Jan 2010

Posts: 1,447

Likes: 1

From: Katy TX

Quote:

Originally Posted by WKMCD

For a 383 he'd want to measure the stroke.

Instead of a 3.89 bore as found on a 346cid, isn't the bore on a 383 around 3.92?

Apr 6, 2011 | 07:22 AM

#26

pit-man

Le Mans Master

Joined: Aug 2007

Posts: 6,473

Likes: 297

From: Orange Park FL

Quote:

Originally Posted by All_Motor_C5LS6

Instead of a 3.89 bore as found on a 346cid, isn't the bore on a 383 around 3.92?

As far as I know, the stroker kit goes in the stock bore, however I think they do have an oversize kit that is slightly larger in bore size.

Apr 6, 2011 | 07:23 AM

#27

paint it black vette

Melting Slicks

Joined: Aug 2006

Posts: 2,205

Likes: 2

From: port monmouth nj

Quote:

Originally Posted by WKMCD

For a 383 he'd want to measure the stroke.

382 = 4.000 crank and stock bore 3.900

Apr 12, 2011 | 09:39 PM

#28

LightFighter_GXP

Pro

Joined: May 2006

Posts: 723

Likes: 0

From: MOTOWN / Fort Dix NJ MI

With stock LS1 intake and TB ....... stock bottom end I make 430... with FAST ported intake and TB I make 458 with Stock 346 bottom end.... with that 383 I would think you should be way north of 450!!!