Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

Specs on L98 iron heads

Thread Tools
 
Search this Thread
 
Old Aug 13, 2002 | 05:30 PM
  #1  
mr.doyle's Avatar
Thread Starter
Junior Member
 
Joined: Jun 2002
Posts: 5
Likes: 0
From: Washington D.C.
Specs on L98 iron heads

Does anyone have the specs on stock L98 350 iron heads? I'd like to know the intake and exhaust port sizes, the combustion chamber size, and typical flow rates if possible.

Thanks!
Reply
Old Aug 13, 2002 | 05:49 PM
  #2  
iroc22's Avatar
Supreme Member
 
Joined: Jan 2001
Posts: 4,415
Likes: 2
From: Surrey, BC
Don't know the port sizes but the combustion chamber size is 64cc. Flow rates are as follows:

Intake:
@.400" - 178cfm
@.500" - 190cfm

Exhaust:
@.400" - 114cfm
@.500" - 115cfm

Hope that helps a bit.
Reply
Old Aug 14, 2002 | 12:19 AM
  #3  
FstBrd6point3's Avatar
Member
 
Joined: Nov 2001
Posts: 354
Likes: 0
From: Middleburry, CT, USA
Intake port size is 170cc
Reply
Old Aug 14, 2002 | 07:31 PM
  #4  
Black 91 Z28's Avatar
Senior Member
 
Joined: Oct 2001
Posts: 571
Likes: 0
From: Starkville, MS
Car: 1991 Camaro Z28
Engine: 350
Transmission: 700R4
Just to expand on the flow numbers posted.

Lift Intake Exhaust
0.1 53.9 41.6
0.2 111.2 95.2
0.3 157.3 112.4
0.4 182 116.6
0.5 192 116.9
0.6 193.6 117.6
28" water
Here's where it's from...
https://www.thirdgen.org/techbb2/sho...ight=iron+head


David
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
lt500r55
Tech / General Engine
6
Sep 1, 2021 01:30 PM
Chuck84TA
Engine/Drivetrain/Suspension Parts for Sale
10
Jul 15, 2016 09:05 PM
InfinityShade
Tech / General Engine
2
Feb 21, 2016 01:29 PM
SLNTSCPE
Tech / General Engine
3
Aug 22, 2015 09:15 PM




All times are GMT -5. The time now is 03:36 PM.