Does anyone know where I can find some of this stuff?

bjones · 01-09-2009, 12:40 PM

A few people have told me the easiest way to upgrade the EFI in my Vortec 5700 (with **** poppet style CSFI) is to upgrade to a marine manifold, which has the TB and all the sensors in stock locations, only difference being the marine intake has conventional injectors that are upgradeable.

So, does anyone know where I can find a good new, or used, Vortec 5700 Marine intake manifold?

mudseeker · 01-09-2009, 12:46 PM

it's pricey, hard to come by and requires some fabbing to make it work. you're probably looking at $1000 in parts. ave you thought about an engine swap? the early vortecs are hard to make any power out of.

bjones · 01-09-2009, 01:08 PM

haha for that cost, I'll do a junkyard vortec 5300 swap

same fabbing, but its expandable i guess?

You get that sweet LS bloodline, and all those 5.3, 6.0 and 6.2L mods, injectors, etc, huh?

stumpuller454 · 01-09-2009, 02:04 PM

dunno about the marine stuff, check ebay? but have you looked into a GM 383HT motor? it was made for your truck...

bjones · 01-09-2009, 03:35 PM

I have, but im more interested in taking the 4k something for a new GM HT383 and putting the cash into a solid rotating assembly, Cam, valve job etc and making my own 383 :]

But the fuel delivery will still be lacking with the poppet setup,

suggestions?

mudseeker · 01-09-2009, 03:37 PM

you can upgrade your fuel spider like i did and then you can increase your fuel pressure with a bigger pump when you do any mods like a cam, tune or what not.

upper intake removal

97 chevy motor swap

i'd do the 5.3 swap if i was you though.

stumpuller454 · 01-09-2009, 07:06 PM

contact FIVE-O-MOTORSPORTS in cali they specialise in fuel injection of all kinds, they could also set you up with a high volume pump. thats were i`ve gotten performance injectors and related equiptment from, very knowledgable guy there...

01-09-2009, 12:40 PM	#1
bjones Full Member Join Date: Oct 2008 Posts: 43	Does anyone know where I can find some of this stuff? A few people have told me the easiest way to upgrade the EFI in my Vortec 5700 (with **** poppet style CSFI) is to upgrade to a marine manifold, which has the TB and all the sensors in stock locations, only difference being the marine intake has conventional injectors that are upgradeable. So, does anyone know where I can find a good new, or used, Vortec 5700 Marine intake manifold? __________________ 1997 GMC Suburban, RIP 12/7/2008 Vortec 5700 V8 300HP 380Ft-Lbs Torque (certainly not stock) 4L60E Tranny 238K Miles A truck, a brother, and a friend to the end.

01-09-2009, 12:46 PM	#2
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,375	it's pricey, hard to come by and requires some fabbing to make it work. you're probably looking at $1000 in parts. ave you thought about an engine swap? the early vortecs are hard to make any power out of. __________________ i'd rather be hunting

01-09-2009, 01:08 PM	#3
bjones Full Member Join Date: Oct 2008 Posts: 43	haha for that cost, I'll do a junkyard vortec 5300 swap same fabbing, but its expandable i guess? You get that sweet LS bloodline, and all those 5.3, 6.0 and 6.2L mods, injectors, etc, huh? __________________ 1997 GMC Suburban, RIP 12/7/2008 Vortec 5700 V8 300HP 380Ft-Lbs Torque (certainly not stock) 4L60E Tranny 238K Miles A truck, a brother, and a friend to the end.

01-09-2009, 02:04 PM	#4
stumpuller454 Senior Member Join Date: Dec 2007 Location: Grande Prairie, AB Posts: 2,043	dunno about the marine stuff, check ebay? but have you looked into a GM 383HT motor? it was made for your truck... __________________ SUPERCHARGED 454 K2500 GMC! 450hp and 600ft/lbs http://www.youtube.com/watch?v=WJ27RJHfJKE "sailing with Captain Morgan often!"

01-09-2009, 03:35 PM	#5
bjones Full Member Join Date: Oct 2008 Posts: 43	I have, but im more interested in taking the 4k something for a new GM HT383 and putting the cash into a solid rotating assembly, Cam, valve job etc and making my own 383 :] But the fuel delivery will still be lacking with the poppet setup, suggestions? __________________ 1997 GMC Suburban, RIP 12/7/2008 Vortec 5700 V8 300HP 380Ft-Lbs Torque (certainly not stock) 4L60E Tranny 238K Miles A truck, a brother, and a friend to the end.

01-09-2009, 03:37 PM	#6
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,375	you can upgrade your fuel spider like i did and then you can increase your fuel pressure with a bigger pump when you do any mods like a cam, tune or what not. upper intake removal 97 chevy motor swap i'd do the 5.3 swap if i was you though. __________________ i'd rather be hunting

01-09-2009, 07:06 PM	#7
stumpuller454 Senior Member Join Date: Dec 2007 Location: Grande Prairie, AB Posts: 2,043	contact FIVE-O-MOTORSPORTS in cali they specialise in fuel injection of all kinds, they could also set you up with a high volume pump. thats were i`ve gotten performance injectors and related equiptment from, very knowledgable guy there... __________________ SUPERCHARGED 454 K2500 GMC! 450hp and 600ft/lbs http://www.youtube.com/watch?v=WJ27RJHfJKE "sailing with Captain Morgan often!"

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