fuel injection idea, good or bad? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Blackhawkdc · 07-29-2003, 09:26 PM

ok, here's my idea. I want to build a big block 496 stroker. I already have everything for the engine, but my idea on the fuel delivery is this: dual carb intake, by Edelbrock. Top it off with a pair of holley or equivalent 4-barrel throttle-body injection units. What do ya'll think? Any other ideas?Just trying to do something unique and yes, I realze it maybe a bit of a hassle, but I enjoy tinkering with stuff. Thanks for any input.

Stroker · 07-29-2003, 10:26 PM

Sounds like a good idea to me. How about a port injected tunnel ram with a pair of billet throttle bodies on top. Good Luck....Stroker

krue · 07-29-2003, 10:33 PM

Have fun!

Low69CST · 07-29-2003, 10:37 PM

I think it would be too much to synchronise. I know my dad talks about those old cars with two 4's were a *****, you get throwin in computers it might get really tricky. There are some MPI units that are big enough to feed that, thats what i'd go with.

Chevy67Tk · 07-29-2003, 10:39 PM

I think it’s a good idea if you can get it to work, we tried it a couple a years ago on a 454 with a pair of holly TBIs . The problem was the 2 units think independent of each other and the air fuel ratios would go to extremes. The only way to get it to even idle stable was to force both units to run open loop. Now if you can get a single control unit that would run both sets of injector body’s I think it would be easily doable.

slam33 · 07-29-2003, 11:11 PM

If your going to go thru all that then why not get a Hillborn manifold and covert it to multi port. Looks better and would run great.

Blackhawkdc · 07-30-2003, 11:58 PM

ttt

72addict · 07-31-2003, 02:53 AM

If you mount the air valves on an airbox that is common to all ports, timing of the two units would not have to be exact. How about units mounted 180 degrees from each other with their bases being parallel to each other? Kinda like a mailbox with an airvalve mounted on each side. That would be odd. Would that make it AIRMAIL? LOL

JayDubBlazer · 07-31-2003, 03:55 AM

technology is good

73stepside · 07-31-2003, 05:58 AM

you could run the holley 900cfm tb's in parallel to the single computer and get it screaming in no time. you might have to get another driver for the extra injectors but i think holley's new fi system supports that. you can run it any way you want it

View Poll Results: dual quad throttle body injection-good or bad idea?
Good idea	13	72.22%
terribly rotten idea, it'll never work	0	0%
just stick with carbs	5	27.78%
Voters: 18. You may not vote on this poll

07-29-2003, 09:26 PM	#1
Blackhawkdc 440 american Horses Join Date: Mar 2001 Location: Anoka, MN USA Posts: 470	fuel injection idea, good or bad? ok, here's my idea. I want to build a big block 496 stroker. I already have everything for the engine, but my idea on the fuel delivery is this: dual carb intake, by Edelbrock. Top it off with a pair of holley or equivalent 4-barrel throttle-body injection units. What do ya'll think? Any other ideas?Just trying to do something unique and yes, I realze it maybe a bit of a hassle, but I enjoy tinkering with stuff. Thanks for any input. __________________ Seth Petro 1969 Chev Short Step 425hp 350, TH400, big tires, fast truck 1979 Pontiac Trans Am 1991 Saturn SL1 - gas mileage! (and free) 1977 Buick LeSabre - for sale May America bless God, and may God bless America

07-29-2003, 10:26 PM	#2
Stroker Registered User Join Date: Mar 2001 Location: Moore, Ok Posts: 1,149	Sounds like a good idea to me. How about a port injected tunnel ram with a pair of billet throttle bodies on top. Good Luck....Stroker __________________ 72 SWB parts and pieces Oklahoma

07-29-2003, 10:33 PM	#3
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	Have fun! __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

07-29-2003, 10:37 PM	#4
Low69CST Registered User Join Date: May 2000 Location: Frankfort, Kentucky, USA Posts: 2,163	I think it would be too much to synchronise. I know my dad talks about those old cars with two 4's were a *****, you get throwin in computers it might get really tricky. There are some MPI units that are big enough to feed that, thats what i'd go with. __________________ '69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks

07-29-2003, 10:39 PM	#5
Chevy67Tk Registered User Join Date: Mar 2003 Location: PA Posts: 349	I think it’s a good idea if you can get it to work, we tried it a couple a years ago on a 454 with a pair of holly TBIs . The problem was the 2 units think independent of each other and the air fuel ratios would go to extremes. The only way to get it to even idle stable was to force both units to run open loop. Now if you can get a single control unit that would run both sets of injector body’s I think it would be easily doable. __________________

07-29-2003, 11:11 PM	#6
slam33 Registered User Join Date: Aug 2001 Location: Long Beach, Ca Posts: 1,432	If your going to go thru all that then why not get a Hillborn manifold and covert it to multi port. Looks better and would run great. __________________ 71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A>

07-30-2003, 11:58 PM	#7
Blackhawkdc 440 american Horses Join Date: Mar 2001 Location: Anoka, MN USA Posts: 470	ttt __________________ Seth Petro 1969 Chev Short Step 425hp 350, TH400, big tires, fast truck 1979 Pontiac Trans Am 1991 Saturn SL1 - gas mileage! (and free) 1977 Buick LeSabre - for sale May America bless God, and may God bless America

07-31-2003, 02:53 AM	#8
72addict Registered User Join Date: Mar 2000 Location: Mason MI, 48854 (strikezone of the mitten) Posts: 894	If you mount the air valves on an airbox that is common to all ports, timing of the two units would not have to be exact. How about units mounted 180 degrees from each other with their bases being parallel to each other? Kinda like a mailbox with an airvalve mounted on each side. That would be odd. Would that make it AIRMAIL? LOL __________________ 1957 Cameo

07-31-2003, 03:55 AM	#9
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,883	technology is good __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT

07-31-2003, 05:58 AM	#10
73stepside Registered User Join Date: Feb 2002 Location: Moore OK 73160 Posts: 974	you could run the holley 900cfm tb's in parallel to the single computer and get it screaming in no time. you might have to get another driver for the extra injectors but i think holley's new fi system supports that. you can run it any way you want it __________________ 04 GMC Sierra RCSS 70 CST LWB 04 HD Sportster 1200 Custom



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