1 3/4 header vs. 1 5/8.
Team Owner
Joined: Dec 2007
Posts: 20,974
Likes: 261
First why are you shocked at 480-500 on a 383? (ported heads)
That is common number for that size. Also, the fact you are carb is why you are there already, as compared to stock tpi intake IMO.
With that hp 1 3/4 is what I would put on, especially if you have gears or anything.
That is common number for that size. Also, the fact you are carb is why you are there already, as compared to stock tpi intake IMO.
With that hp 1 3/4 is what I would put on, especially if you have gears or anything.
Thread Starter
Pro
Joined: Mar 2008
Posts: 702
Likes: 0
The heads are obviously choking it but we knew that going into it.
383 113 heads, .570 lift cam 110 lsa 230/230 @500
470 ft lbs @4900 and 478chp at 5700.
415 ftlbs @ 3000 rpms
460+hp from 5200 to 6500
The carb is running fat up top so we are going to re jet and run it again.
383 113 heads, .570 lift cam 110 lsa 230/230 @500
470 ft lbs @4900 and 478chp at 5700.
415 ftlbs @ 3000 rpms
460+hp from 5200 to 6500
The carb is running fat up top so we are going to re jet and run it again.
Thread Starter
Pro
Joined: Mar 2008
Posts: 702
Likes: 0
First why are you shocked at 480-500 on a 383? (ported heads)
That is common number for that size. Also, the fact you are carb is why you are there already, as compared to stock tpi intake IMO.
With that hp 1 3/4 is what I would put on, especially if you have gears or anything.
That is common number for that size. Also, the fact you are carb is why you are there already, as compared to stock tpi intake IMO.
With that hp 1 3/4 is what I would put on, especially if you have gears or anything.
Le Mans Master
Joined: Dec 2002
Posts: 5,270
Likes: 3
From: Seattle Area WA
The heads are obviously choking it but we knew that going into it.
383 113 heads, .570 lift cam 110 lsa 230/230 @500
470 ft lbs @4900 and 478chp at 5700.
415 ftlbs @ 3000 rpms
460+hp from 5200 to 6500
The carb is running fat up top so we are going to re jet and run it again.
383 113 heads, .570 lift cam 110 lsa 230/230 @500
470 ft lbs @4900 and 478chp at 5700.
415 ftlbs @ 3000 rpms
460+hp from 5200 to 6500
The carb is running fat up top so we are going to re jet and run it again.
113s have been shown to flow in the 260cfm range. Sounds like you could start charging for you half-assed job.
Team Owner
Joined: Dec 2007
Posts: 20,974
Likes: 261
I guess my main point is you already have a decent intake on top to allow some flow, and 113's are not great compared to other stuff, but they are not terrible either.
Congrats on doing a successful build.
