Calgary Jeep Association

Author Topic: SBC Tuned Port Injection  (Read 2692 times)

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Offline muffintop

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SBC Tuned Port Injection
« on: February 09, 2010, 01:13:30 PM »
Is there anyone in the CJA who has experience installing/converting a SBC to tuned port injection (TPI)?

Here are the choices for my SBC powered YJ:

1st choice... buy a brand new "Affordable Fuel Injection" TPI setup. Problem is everytime I call there are none available to ship. If I put down $1000 the guy says they ship in 8 weeks... which probably means 16 weeks plus. This is a complete brand new kit w/ distributor, fuel pump, harness, manifold, computer, program , etc.

2nd choice... I already have a "mass flow" TPI manifold off of a running SBC and can buy a brand new "speed density" 3 wire hookup harness w/ computer & program for $500. This will involve purchasing some sensors, etc and taking a run at getting it to all work together. I am really leery of this option as I think it could turn into a nightmare pretty quick.

Anyway... have any experience with this?
« Last Edit: February 09, 2010, 04:19:04 PM by muffintop »
2014 Jeep SRT
2009 Jeep XK, 5.7L, 3" lift & AEV rims
2003 Jeep TJ, 4.5L stroker, 38's, custom long arm, 609 HP diffs, atlas, coil overs, full hydro, etc.
1997 Jeep TJ, 4.0L, 35's, Clayton long arm, locked SAG30, locked SAG35, coil overs, air bumps

Offline 4PLAYZJ

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Re: SBC Tuned Port Injection
« Reply #1 on: February 09, 2010, 03:42:30 PM »
what year is the small block, do you mind changing the heads?, If you found a vortec donor you could use the vortec heads on your short block and all the oem fuel injection/wiring/pcm components.  The only prob with these heads is that if your cam has a large amount of lift the rocker studs bosses would have to be machined down.  When all is said and done you could have davenport do a custom tune on their dyno.  If I had to guess the whole thing would prob cost 1000-1500 depending on the cost of the donor parts.  Just an idea. Plus all your parts would be local and cheap if anything ever failed.

Offline muffintop

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Re: SBC Tuned Port Injection
« Reply #2 on: February 09, 2010, 04:28:40 PM »
It's a 1970 w/ old style heads. Would like to stick w/ engine "as is" but swap on TPI to replace the TBI.

This is one of those "its easy when ya know how" kinda things. If I take on option#2... it would be nice to have a "consultant" I could call when the thing wont start and I'm ready to pour a can of gas on it  ;)

 
2014 Jeep SRT
2009 Jeep XK, 5.7L, 3" lift & AEV rims
2003 Jeep TJ, 4.5L stroker, 38's, custom long arm, 609 HP diffs, atlas, coil overs, full hydro, etc.
1997 Jeep TJ, 4.0L, 35's, Clayton long arm, locked SAG30, locked SAG35, coil overs, air bumps

Offline 4PLAYZJ

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Re: SBC Tuned Port Injection
« Reply #3 on: February 09, 2010, 05:45:54 PM »
I still think that the vortec heads will fit it.  I know people that have this setup on 1970's 400 small blocks and it works great.  Either way I have done similar conversion work in the past for customers so if you have anything I might be able to help with send me a pm.

Offline hps4evr

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Re: SBC Tuned Port Injection
« Reply #4 on: February 09, 2010, 11:01:05 PM »
whats wrong with the TBI? its a simple design that seems to work.
YJ=Y’all Jealous

Offline muffintop

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Re: SBC Tuned Port Injection
« Reply #5 on: February 10, 2010, 02:11:51 AM »
Nothing really wrong with the TBI.

The main driver for this project is the wiring in the YJ leaves a little to be desired... so I got a sweet custom switch panel from "12voltguy" that will run the whole Jeep and a universal "Painless" wiring harness and re-wire the whole Jeep.



Now... if I'm going to re-wire the whole thing... I would like to clean up my fuel injection harness as well... and... I have always like TPI over TBI... so here I am.

If I could actually get my hands on a brand new "AFI" TPI system... I would be wiring up my Jeep right now instead of writing this post  ;)
« Last Edit: April 03, 2010, 03:08:11 PM by muffintop »
2014 Jeep SRT
2009 Jeep XK, 5.7L, 3" lift & AEV rims
2003 Jeep TJ, 4.5L stroker, 38's, custom long arm, 609 HP diffs, atlas, coil overs, full hydro, etc.
1997 Jeep TJ, 4.0L, 35's, Clayton long arm, locked SAG30, locked SAG35, coil overs, air bumps

Offline i_go_commando

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Re: SBC Tuned Port Injection
« Reply #6 on: February 10, 2010, 08:00:55 PM »
if you plan on rewireing a vehicle, i advise getting a kit. yes you can buy all the pieces, but its nice to have labeled wires already bunched together. i have rewired several vehicles from scratch and can see the virtues of a kit. i have a 58 willies that is only partly wired because of this, that and its hard to solder with hyperthermia
1973 jeep commando -amc 360, 727,203/208, waggy d 44 and amc20- soa, OBA- on hiatus
1958 fc 170 cabover quad cab 3/4 pickup.continetal engine/ 700r4/ dana 300 current project

Offline muffintop

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Re: SBC Tuned Port Injection
« Reply #7 on: February 11, 2010, 05:26:44 AM »
if you plan on rewireing a vehicle, i advise getting a kit.

Got one...
2014 Jeep SRT
2009 Jeep XK, 5.7L, 3" lift & AEV rims
2003 Jeep TJ, 4.5L stroker, 38's, custom long arm, 609 HP diffs, atlas, coil overs, full hydro, etc.
1997 Jeep TJ, 4.0L, 35's, Clayton long arm, locked SAG30, locked SAG35, coil overs, air bumps

Offline muffintop

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Re: SBC Tuned Port Injection
« Reply #8 on: February 11, 2010, 05:49:59 AM »
Fear of the unknown wins  :-[ I'm gonna order a AFI TPI system today and take my chances. Maybe the guy is telling the truth and it will be in... in 6-8 weeks.

Pretty  sweet setup...

 http://www.affordable-fuel-injection.com/index.php?id=12&title=Tuned+Port+Fuel+Injection
2014 Jeep SRT
2009 Jeep XK, 5.7L, 3" lift & AEV rims
2003 Jeep TJ, 4.5L stroker, 38's, custom long arm, 609 HP diffs, atlas, coil overs, full hydro, etc.
1997 Jeep TJ, 4.0L, 35's, Clayton long arm, locked SAG30, locked SAG35, coil overs, air bumps

Offline muffintop

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  • Posts: 306
  • You spilled my macchiato!
Re: SBC Tuned Port Injection
« Reply #9 on: April 03, 2010, 03:06:11 PM »
Holy crap... my TPI system for my YJ shipped... and right bang in between the 6-8 weeks they told me. I should learn to be more trusting  ::)

Its not all rainbows and lollypops though... they sent it Via UPS instead of USPS... so theres another $300 gone. Man do I hate UPS  >:(

If I get it running I'll post some pics and brag... if not I'll hide and feel the shame  :-[
2014 Jeep SRT
2009 Jeep XK, 5.7L, 3" lift & AEV rims
2003 Jeep TJ, 4.5L stroker, 38's, custom long arm, 609 HP diffs, atlas, coil overs, full hydro, etc.
1997 Jeep TJ, 4.0L, 35's, Clayton long arm, locked SAG30, locked SAG35, coil overs, air bumps