Engine & Internal Chat about beefing up your Blazer's engine insides here.

400hp 350TBI advice

Old 06-27-2012, 08:29 PM
Beginning Member
Thread Starter
Join Date: Oct 2011
Posts: 11
jaredp181 is on a distinguished road
Default 400hp 350TBI advice

I have a 89 k5 with the LO5 350TBI and wanting to do some major mods to get as close to or more than 400hp with a somewhat high compression ratio around 10:1 give or take. This is what im thinking so far of course this isnt everything just the major things. What kind of output could i get with this combo or would it even work together or is there something better?

65cc AFR vortec heads Airflow Research (AFR) 0912 - AFR 190cc Vortec Eliminator Street Cylinder Heads - Overview - SummitRacing.com

GM Vortec Intake Manifolds GM Performance 12496821 - GM Performance Vortec Intake Manifolds with TBI - Overview - SummitRacing.com

Holley Throttle Body 670 cfm Holley 502-6 - Holley OE Replacement Throttle Bodies - Overview - SummitRacing.com

Engine Rebuild Kits w/Flat Top Pistons Sealed Power CSMHP760-000 - Federal Mogul Premium Engine Rebuild Kits - Overview - SummitRacing.com

Head Gaskets are .028 compressed

Last edited by jaredp181; 06-27-2012 at 09:52 PM.
Old 06-28-2012, 01:15 AM
Blazin_Jason's Avatar
Super Member
Join Date: May 2006
Location: Van Isl, B.C.
Posts: 1,581
Blazin_Jason will become famous soon enough

From what I've been told 400hp is pretty tough with a TBI, but possible. The cam will be very important as well. Other things to keep in mind will be possibly higher fuel pressure and computer tuning upgrades.
Old 06-28-2012, 07:00 AM
Beginning Member
Thread Starter
Join Date: Oct 2011
Posts: 11
jaredp181 is on a distinguished road

I was all ready planning to have a very extensive tune done but as far as the cam goes I have one in mind but what would be recommended for this setup to get the output I'm wanting
Related Topics
Thread Starter
Last Post
Engine & Transmission
12-24-2013 09:49 PM
Performance & Brainstorming
08-29-2011 11:27 AM
Performance & Brainstorming
03-21-2011 08:53 PM
Full Size K5 (1969-1991) GMT415 (1992-1994) Tech
12-24-2010 08:03 AM
02 Vortech
Engine & Internal
06-29-2005 06:12 AM

Thread Tools
Search this Thread
Quick Reply: 400hp 350TBI advice

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.