| Re: [GMCnet] Howell fuel injection [message #179604] |
Wed, 08 August 2012 21:20  |
KB
Messages: 1262
Registered: September 2009
Karma: 0
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Senior Member |
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> Which coach did you put the TBI on, and can you comment on the difference in drivability?
It's on the '75 ex-eleganza. The poor little '23 is currently a sad yard ornament
awaiting attention.
Night and day difference. You'd have to pay us a LOT to go back to a carb.
No weird pumping pedals and waiting for the rubber bands and bubble gum in the carb
to come up to temp. Turn the key, it starts and runs beautifully at any altitude
or temperature (so far). We've gone from 8.5mpg to comfortably over 10.
We're still trying to figure our exact mileage, but can already tell it's a big
improvement and we don't even have it tuned all the way or lean highway cruise
turned on yet.
> Any guess as to your total $$ outlay
It'll vary depending on what you find and how much you want to add, but
here's what I did:
I got a tbi and harness, including most sensors (map, iac, tps, coolant, oil pressure)
from a craigslist seller for $285. If you can find it in a junkyard it'd be cheaper,
especially if you don't have to pay bay area pick-n-pull prices.
I then added:
TBI gaskets/rebuild kit $33 (ebay)
Cardone 301873 remanufactured computer controlled distributor: $62 (ebay)
heated o2 sensor with 3-wire pigtail: $71 (ebay) (non-heated would be a lot cheaper)
IAT sensor and pigtail ~$9 (junkyard) (optional)
Carb to TBI adapter plate $48 (summit) (you could make one of these for less)
Carter P5001 fuel pump and WIX double inlet/outlet filter base and filter
(so I can later add a second fuel pump later): about $130 (amazon)
Other pumps (eg airtex 2182) will work too and are cheaper; I just liked that this
pump seemed appropriately sized for our use. The fancy fuel filter isn't required either.
used ESC module (for the knock sensor) and distributor wiring connectors: ~$15 (junkyard)
Knock sensor: $15 (rockauto)
Dakota digital sgi-5 speed sensor output adjuster (to adapt the rostra cruise sensor, optional
and there are other ways to do it) $94
Fuel lines (poly armor hard line as much as possible, otherwise short pieces of 30r9 rubber hose): ~$70
Injector testing/cleaning (optional but highly recommended) $52 (witchhunter performance)
I'm sure I've missed some smallish stuff, but I'd say around $900 or so all told,
not including the EBL which is optional but REALLY recommended. This is for a moderately
complete efi setup with an OEM oil pressure sensor to shut off the engine if pressure is lost
(which most kits don't include), IAT (air temp), speed sensor (VSS), heated o2 sensor, and knock sensor.
I will add that the biggest part of the job (other than overcoming my own ignorance)
was adapting the wiring harness. It occupied our kitchen table for weeks as I figured
out what's what and labeled everything. With junkyard stuff, you also run the risk
of stuff not working and adding to the confusion (like the bad MAP sensor we had).
A kit would be easier.
hope this is useful.
Karen
1973 23'
1975 26'
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Karen
1975 26'
San Jose, CA
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| Re: [GMCnet] Howell fuel injection [message #179605 is a reply to message #179604] |
Wed, 08 August 2012 21:27  |
 |
ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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Excellent - Thank you!
Larry Davick
On Aug 8, 2012, at 7:20 PM, KB <kab7@sonic.net> wrote:
>> Which coach did you put the TBI on, and can you comment on the difference in drivability?
>
> It's on the '75 ex-eleganza. The poor little '23 is currently a sad yard ornament
> awaiting attention.
>
> Night and day difference. You'd have to pay us a LOT to go back to a carb.
> No weird pumping pedals and waiting for the rubber bands and bubble gum in the carb
> to come up to temp. Turn the key, it starts and runs beautifully at any altitude
> or temperature (so far). We've gone from 8.5mpg to comfortably over 10.
> We're still trying to figure our exact mileage, but can already tell it's a big
> improvement and we don't even have it tuned all the way or lean highway cruise
> turned on yet.
>
>> Any guess as to your total $$ outlay
> It'll vary depending on what you find and how much you want to add, but
> here's what I did:
>
> I got a tbi and harness, including most sensors (map, iac, tps, coolant, oil pressure)
> from a craigslist seller for $285. If you can find it in a junkyard it'd be cheaper,
> especially if you don't have to pay bay area pick-n-pull prices.
>
> I then added:
> TBI gaskets/rebuild kit $33 (ebay)
> Cardone 301873 remanufactured computer controlled distributor: $62 (ebay)
> heated o2 sensor with 3-wire pigtail: $71 (ebay) (non-heated would be a lot cheaper)
> IAT sensor and pigtail ~$9 (junkyard) (optional)
> Carb to TBI adapter plate $48 (summit) (you could make one of these for less)
> Carter P5001 fuel pump and WIX double inlet/outlet filter base and filter
> (so I can later add a second fuel pump later): about $130 (amazon)
> Other pumps (eg airtex 2182) will work too and are cheaper; I just liked that this
> pump seemed appropriately sized for our use. The fancy fuel filter isn't required either.
> used ESC module (for the knock sensor) and distributor wiring connectors: ~$15 (junkyard)
> Knock sensor: $15 (rockauto)
> Dakota digital sgi-5 speed sensor output adjuster (to adapt the rostra cruise sensor, optional
> and there are other ways to do it) $94
> Fuel lines (poly armor hard line as much as possible, otherwise short pieces of 30r9 rubber hose): ~$70
> Injector testing/cleaning (optional but highly recommended) $52 (witchhunter performance)
>
> I'm sure I've missed some smallish stuff, but I'd say around $900 or so all told,
> not including the EBL which is optional but REALLY recommended. This is for a moderately
> complete efi setup with an OEM oil pressure sensor to shut off the engine if pressure is lost
> (which most kits don't include), IAT (air temp), speed sensor (VSS), heated o2 sensor, and knock sensor.
>
> I will add that the biggest part of the job (other than overcoming my own ignorance)
> was adapting the wiring harness. It occupied our kitchen table for weeks as I figured
> out what's what and labeled everything. With junkyard stuff, you also run the risk
> of stuff not working and adding to the confusion (like the bad MAP sensor we had).
> A kit would be easier.
>
> hope this is useful.
>
> Karen
> 1973 23'
> 1975 26'
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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