NSW Corvettes
Technical Tips => Engines - Carbies - Exhausts - Dissys => Topic started by: Mattrix on January 19, 2006, 10:17:43 AM
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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.
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u got 2 years to kill u could do heaps to that vet;29
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Originally posted by MJ427
u got 2 years to kill u could do heaps to that vet;29
what year was it?
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'78
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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
(http://static.summitracing.com/global/images/prod/norm/hly-950-22s_m.jpg)
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.
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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.
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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
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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.
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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.
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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! ;-)
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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?
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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.
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"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.
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Later model EFI engines are really the way to go.
What ever happened to your LS1-6speed idea?
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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.
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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
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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
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Hey sounds interesting. is that in australia? do you have a link to the specific post?
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located in melbourne
http://camaro-firebird.dyndns.org/viewtopic.php?t=1152
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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.
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if you want to try the LT1 setup read this
http://sethirdgen.org/LT1.htm ...alot more work to get it sorted
btw IF you choose to go the fuel injection route i could be interested in your carby and manifold ...
also i am not the seller of the tpi so i have no barrow to push :drink
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it is a "no contest" for me the lt1 setup wins hands down, both are very very very easy to set up with the lt1 the easiest.
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well i'm a power down low person myself, so maybe TPI sounds like the go. it also all sounds rather messy, having to grind bits and pieces here and there, so much to consider. maybe i buy the parts and pay someone else to put it on. or i could teach myself. and it would take me about a year :)
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Not to cut anyone else of a deal but I have several TPI setups as well.
"i could teach myself. and it would take me about a year"
Anyone with basic mechanical skills can do the conversion.
So long as you are using factory TPI components and not trying to do a mix and match it is virtually plug and play.
Would ultimately need someone to tune the chip to optimise your particular setup .
What you require is
TPI manifold complete.
TPI or late electronic dizzy (Vortec may work)
TPI engine wiring loom.
TPI ECM
Elec fuel pump.and return line to tank
Various factory sensors to send signal to ECM
The LTI requires the same parts , just different manifold.
Yes it will cost you $$$ but still consideribly cheaper than a off the shelf aftermarket kit from the US.
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ohh i do know a person that has an 86 coil in cap dissy that could be for sale located in wollongong
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87Z51 - so you have some of those for sale also?
i do have a reasonable grasp of mechanics, it's just all the grinding and welding that i can't do :) I have rebuilt a nissan 6cyl engine before, as well as doing numerous gearboxes, brakes, water pump/ps pump etc etc. It'll take me a bit to get used to the 350, quite different to the 6cyl jap engines i'm used to. But if it is, as you say, a plug and play process then i don't see why i wouldn't be able to attack it. and it would probably be a case of accumulate the parts over a period of time (when my extra music work happens in a month), and then piece it all together over a period of time as it doesn't matter since it's not rego'd yet anyway :)
So i would get a standard ECU that would need to be flashed again to suit my particular setup?
and is that an inline fuel pump or in tank? i assume i'd be best to go overboard in terms of the rating on the fuel pump, just in case i ever decide to do crazy things to my engine that require more fuel to be fed to it.
How does the TPI setup then work with a supercharger? (if i am crazy enough to want to try that in the future). Again i'm used to fuel injection setups on zed cars where you would use a side mount supercharger like that off a 6cyl toyota, as opposed to a top mount. what do people think of the Eaton M90? just noticed they go for good prices... i imagine there still needs to be other brackets/plates and bits and pieces that i would need to get on top of that, of course. but just something i noticed....
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eaton m90 supercharger is way way way to small for a 350 chev it would do nothing.
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ah ok. no problem :)