Fuel inject a 402?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72 Cheyenne402 · 01-17-2006, 06:31 PM

Hey guys I would like to fuel inject my 402. The problem is I would like to do it economicaly. Every fuel injection system I have sceen seems to be really expensive. Any Ideas?

MrC1 · 01-17-2006, 06:35 PM

Wonder if a newer production BB system would bolt up. Not likely, huh? That would be nice!

72 Cheyenne402 · 01-17-2006, 06:40 PM

I think GM makes a aftermarket fuel injection but the cost is around 2200.00 or so

70rs/ss · 01-17-2006, 07:06 PM

A late model vortec or tbi will fit, the vortec may need holes redrilled, but the intake etc is the same. Just find a wrecked 3/4 ton on up and you can find the system for a BBC. Then the next hurdle will be tuning. For the extra cost I'd just keep it carb'd, wait a minute I do, everything except my 05 Yukon XL is carb'd because of cost and ease of operation. EFI does not increase MPG enough to justify $2-3k IMO. Swap in a FI'd smallblock and you looking at $3-5K and 15-18 MPG, so why bother? They cold start better and get 3-5 mpg better maybe. You can get away with a lot, but nothing is easy or cheap. Good luck, I was going to use a TBI out of a 454SS truck, but it doesn't help economy and severly limits performance so I have a 750 double pumper on it.

70GMCer · 01-17-2006, 07:09 PM

I seem to remember the "Holly" had a FI setup that bolted right onto your regular intake. I think I remember the kit being around $500.00......

72 Cheyenne402 · 01-17-2006, 11:10 PM

Thanks guys

cell · 01-17-2006, 11:52 PM

be sure to check out msefi.com and megasquirt.info if you are the do it yourself type. They have message boards over there you might try as well.

01-17-2006, 06:31 PM	#1
72 Cheyenne402 Registered User Join Date: Feb 2005 Location: Texas Posts: 581	Fuel inject a 402?? Hey guys I would like to fuel inject my 402. The problem is I would like to do it economicaly. Every fuel injection system I have sceen seems to be really expensive. Any Ideas?

01-17-2006, 06:35 PM	#2
MrC1 Dork For Days Join Date: Aug 2005 Location: Dallas Posts: 407	Re: Fuel inject a 402?? Wonder if a newer production BB system would bolt up. Not likely, huh? That would be nice! __________________ 1972 C20, 402/700R4 - My first classic truck, bought in September 2005. 85% transformed from "Farm" to "Cool" status! 1970 Dodge Challenger 440, 4sp (my other toy) 12.67 @ 117 MPH, with a pathetic 2.022 60' 2007 Dodge Charger SRT-8 2008 Cadillac CTS All-American garage, baby!

01-17-2006, 06:40 PM	#3
72 Cheyenne402 Registered User Join Date: Feb 2005 Location: Texas Posts: 581	Re: Fuel inject a 402?? I think GM makes a aftermarket fuel injection but the cost is around 2200.00 or so

01-17-2006, 07:06 PM	#4
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,270	Re: Fuel inject a 402?? A late model vortec or tbi will fit, the vortec may need holes redrilled, but the intake etc is the same. Just find a wrecked 3/4 ton on up and you can find the system for a BBC. Then the next hurdle will be tuning. For the extra cost I'd just keep it carb'd, wait a minute I do, everything except my 05 Yukon XL is carb'd because of cost and ease of operation. EFI does not increase MPG enough to justify $2-3k IMO. Swap in a FI'd smallblock and you looking at $3-5K and 15-18 MPG, so why bother? They cold start better and get 3-5 mpg better maybe. You can get away with a lot, but nothing is easy or cheap. Good luck, I was going to use a TBI out of a 454SS truck, but it doesn't help economy and severly limits performance so I have a 750 double pumper on it. Last edited by 70rs/ss; 01-17-2006 at 07:07 PM.

01-17-2006, 07:09 PM	#5
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Re: Fuel inject a 402?? I seem to remember the "Holly" had a FI setup that bolted right onto your regular intake. I think I remember the kit being around $500.00...... __________________ 1997 GMC Sierra Ext 1965 Mustang

01-17-2006, 11:10 PM	#6
72 Cheyenne402 Registered User Join Date: Feb 2005 Location: Texas Posts: 581	Re: Fuel inject a 402?? Thanks guys

01-17-2006, 11:52 PM	#7
cell Active Member Join Date: Nov 2005 Location: Austin Posts: 217	Re: Fuel inject a 402?? be sure to check out msefi.com and megasquirt.info if you are the do it yourself type. They have message boards over there you might try as well.



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