Author Topic: Fuel Injection Upgrade on C3 (Read 10105 times)

Mattrix · « **on:** January 19, 2006, 10:17:43 AM »

Hi all, I'd heard that there are kits available to convert the carby 350 into a fuel injected version. i heard it's not exactly like the fuel injection that appeared on the newer 350 engines, but more like just plumbing it into the existing system (instead of completely replacing the system). Anyone know anything about this? Imagine it could save me lots on fuel if I did go ahead with an upgrade like this... just something i'm thinking about.

MJ427 · « **Reply #1 on:** January 19, 2006, 06:06:02 PM »

u got 2 years to kill u could do heaps to that vet;29

jolinari · « **Reply #2 on:** January 19, 2006, 07:38:06 PM »

Quote

Originally posted by MJ427
u got 2 years to kill u could do heaps to that vet;29

what year was it?

Mattrix · « **Reply #3 on:** January 19, 2006, 10:17:41 PM »

69 DIRTY RAT · « **Reply #4 on:** January 19, 2006, 10:59:09 PM »

This is what you need for fuel inj.

http://store.summitracing.com/default.asp?Ntt=hly-950-22s&searchinresults=false&Ntk=KeywordSearch&DDS=1&N=115&target=egnsearch.asp&x=23&y=11

Infinitely adjustable horsepower.
Now you can get the horsepower and drivability benefits of EFI for your carbureted V8 with these Holley Commander 950 throttle body injection kits. These kits use speed density technology, which means they improve performance at cruising rpms, as well as throttle response. They also accept engine modifications like bigger cams, headers, etc. But the big deal is that these systems are fully programmable. They give you total control over fuel and timing curves via a laptop computer. They feature a 4-injector throttle body unit with progressive linkage, the Commander 950 ECU, MAP and oxygen sensors, an idle air control motor, an inline fuel pump, a wiring harness, and installation hardware.

MADVET · « **Reply #5 on:** January 20, 2006, 07:00:26 AM »

The Holley TBI is one of the easiest and most cost effective ways to have fuel injection, the kits come with all the gear you need plus instructions to set it up. You could also fit used TPI systems as a lot get replaced with super rams, mini rams etc so are sold pretty cheap, however a reasonable knowledge of efi is required to set it up.

Mattrix · « **Reply #6 on:** January 20, 2006, 09:12:42 AM »

which one though? there's quite a few on there. being the cheap skate I am I would be inclined to go with the cheapest one, though that's probably not the best idea :D

http://www.newcastlezeds.com/images/personal/choice-of-tbi.jpg

MADVET · « **Reply #7 on:** January 20, 2006, 09:33:21 AM »

As the old adage goes "You get what you pay for", however even the cheapest kit they have listed would be a whole lot more efficient than what you've got on your car now.

87Z51 · « **Reply #8 on:** January 24, 2006, 07:34:30 PM »

Check the price , US$1400 from Jegs for 650cfm.

Could do a C4 TPI conversion for a lot less or even Crossfire as used on '82-84.
Then you could use all factory parts , no adapting needed.

If you had a TPI harness and ECM then it would be virtually plug and play.

77CVT · « **Reply #9 on:** January 25, 2006, 03:02:13 PM »

Quote

Originally posted by Mattrix
... Imagine it could save me lots on fuel if I did go ahead with an upgrade like this... ...

:b4
I don't think so! You'll just drive it harder! ;-)

Mattrix · « **Reply #10 on:** January 27, 2006, 12:00:20 PM »

hahaha, nah i'm not THAT much of a hoon thanks! :)

So 87251, you reckon i'd be better off getting the parts off an old c4 or crossfire instead of going with the new kit from the states? what price would i be looking at for that setup?

BOSCHVETTE · « **Reply #11 on:** January 27, 2006, 01:31:29 PM »

you should be able to get a good set up from a tpi for about $1000 aus but make sure you get a speed density not a mass air flow setup.
but if i was you i would do a lt1 conversion setup,the result for the dollars would be much better.

87Z51 · « **Reply #12 on:** January 28, 2006, 12:51:04 PM »

"If i was you i would do a lt1 conversion setup"

Don't mention that on this forum.:24
Last time I suggested that option got flamed badly by uninformed experts.

"Not designed for non LTX motors ,etc!"

Notwithstanding I am converting one for my 383.
Have a spare if anyone is interested.

MADVET · « **Reply #13 on:** January 28, 2006, 03:33:56 PM »

Later model EFI engines are really the way to go.
What ever happened to your LS1-6speed idea?

Mattrix · « **Reply #14 on:** March 17, 2006, 10:22:15 PM »

LS1 looked like big bucks.

87Z51 - you have a spare LT1? or am i reading that wrong...

Was talking to a guy a couple of months back that told me of an idea where you drill into the manifold and force injectors into the holes. yes, he's a nut case but a clever nut case that can get just about anything to run and run well :) so keen to talk more with him about possibilities. he also does LPG conversions so i may be able to get him to do it all at once.

BOSCHVETTE · « **Reply #15 on:** March 18, 2006, 06:48:35 AM »

mattrix
honestly the best value for money,performance,economy and easy install would be a LT1 conversion.you can pick them up cheap and do most of the install yourself with excellent results.are you going to the convention if so i can bring all the info. with me that shows you how to do it.i have done alot of EFI conversions on a few different types of cars lately for mates of mine and they all love it.it is alot easier than you think.
P.S. Dont do what you mentioned above you will regret it.
cheers boschvette

Ausrs · « **Reply #16 on:** March 19, 2006, 10:29:27 PM »

for sale at the moment on cf.org forums
I have a complete TPI set up. Manifold with injectors, Throttle Body, Fuel Rails, Regulator and MAP Sensor, If your nice and dont try to crunch me I will even throw in the Computer . you will have to find a wiring loop as mine is missing , was of a 85 Covette .
Ideal set up for any one who wants to up grade there car to TPI on a pre 87 car it's just taking up space on the self at home $800.00

hope that helps

Mattrix · « **Reply #17 on:** March 20, 2006, 10:36:05 AM »

Hey sounds interesting. is that in australia? do you have a link to the specific post?

Ausrs · « **Reply #18 on:** March 20, 2006, 06:23:32 PM »

located in melbourne
http://camaro-firebird.dyndns.org/viewtopic.php?t=1152

87Z51 · « **Reply #19 on:** March 20, 2006, 10:51:09 PM »

Don't forget you will need a late "electronic " dizzy from a TPI Camaro / Firebird / Corvette to run with the ECM.Has no vac advance , all computer controlled.
Stock HEI has no output signal for the ECM to reference.

I have a 95 LT1 manifold , fuel rails , TB and a SLP adjustable regulator I will argue around $600 over.May have a late model speed density ECM available soon as well .The better set up to run for performance.
Ask Boschvette.
TPI will give heaps of bottom end whereas the LT1 is more of a top end setup.Not much can beat a L98 TPI setup off the line , stock v stock.
Pick your poison.