Vortec L31 MARINE MANIFOLD project! Q&A

Performance modifications, tips & tricks

Moderators: flyingpolarbear, Eric@PPE, VicC, James B.

99turbo
Posts: 31
Joined: Tue Nov 27, 2012 12:05 am

MAF

Post by 99turbo »

A James B. were you running enough boost that you had to upgrade the MAF to get more Hz?
If so could you tell me what you upgraded to, and if I need to worry pinnouts/rewiring and such.....

OR how bout one from a 2001-02 chevy 2500 6LTR?

Any help is greatly appropriated,
Thanks.

davkenrem
Posts: 16
Joined: Sun Aug 13, 2006 7:55 pm

Post by davkenrem »

Formyboat wrote:Could somebody tell me the part number of this marine manifold preferably the lower section or where to get one and what term to use I have had no luck at all new or 2 nd hand
Thanks James
http://www.michiganmotorz.com/indmar-al ... 11195.html

rmoschilli
Posts: 1
Joined: Mon Apr 01, 2019 1:47 pm
Location: Kempner, Texas

Vortec Marine Manifold Post.

Post by rmoschilli »

I am currently caught between a rock and
Hard place.

Need to talk to someone who was involved in this project.

Can somebody help me out??

Thanks,

Rick

James B.
Moderator
Posts: 2822
Joined: Thu Apr 03, 1997 4:00 pm
Location: '98GMT400, '98GMT410, '99GMT420, '00GMT420

Re: Vortec Marine Manifold Post.

Post by James B. »

rmoschilli wrote:I am currently caught between a rock and
Hard place.

Need to talk to someone who was involved in this project.

Can somebody help me out??

Thanks,

Rick
Hello Rick, what would you like to know?

Aaron383
Posts: 1
Joined: Sat Jun 01, 2019 4:55 pm
Location: Hot springs

MArine intake

Post by Aaron383 »

HEY I was wondering if i could run my thermostat bypass to the already tapped hole in the intake water jacket by the egr port.

I would think it wouldn’t matter but would like a little input from the guys that have done this swap.
Also would like to know if anyone has had luck with blackbear tuning with this swap?

I’ve about got every thing finished to put the new stroker in my 99 2door Tahoe.

P.s. thank you guys for the detailed write up, has made this a pretty easy swap, I learned about the intake from a guy that must have read this forum.

I know it’s an old post, sorry for bringing it back 13 years later, prolly should have done ls swap

BrandonE
Posts: 2
Joined: Tue Apr 21, 2020 3:53 pm
Location: Northern Michigan

Post by BrandonE »

Well, I’m new here but used a lot of this thread to build a 406 small block with the marine intake and Black Bear Tune. Should have it going this weekend. Last couple guys had questions I could probably help with if you’re still out there. Stay tuned...

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