Convert your 305 to Speed Density from MAF!
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Convert your 305 to Speed Density from MAF!
I did this when my MAF broke and it was cheaper to convert than get a new MAF and cleaned up the wiring in my engine bay (2 less relays to worry about and less restriction for air flow). I am selling the PROM needed to convert a 305 to speed density. It was for my 86 Trans Am, stock fuel tables, VATS disabled, "bit flipped" for the VSS to work with the older cars as well. Asking $50.
All you need for the conversion is a MAP sensor and 730 ECM.
All you need for the conversion is a MAP sensor and 730 ECM.
Thread Starter
Supreme Member
iTrader: (1)
Joined: Oct 2004
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Originally Posted by firebirdjosh
I am selling the PROM needed to convert a 305 to speed density.
All you need for the conversion is a MAP sensor and 730 ECM.
Thread Starter
Supreme Member
iTrader: (1)
Joined: Oct 2004
Posts: 3,361
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
MAP sensor, rubber hose, and pigtail for the sensor can be included for $20. You'd just need an ECM.
Last edited by firebirdjosh; Jul 26, 2006 at 08:06 PM.
Joined: Jul 1999
Posts: 12,100
Likes: 127
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Originally Posted by firebirdjosh
I didn't think I could make it much clearer.
I think he's confused because you forgot to mention he has to repin the harness to work with a '730.
Pretty good deal.. SD memcals are getting expencive now.
-- Joe
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Thread Starter
Supreme Member
iTrader: (1)
Joined: Oct 2004
Posts: 3,361
Likes: 2
From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Oh ok. Well for anyone else confused/intriqued here's the website I used with step by step directions of what's needed for the swap and how to do it. Can be done in an hour if you plan it out and are good at wiring.
My 85 Z28 and Changing a '165 ECM to a '730
My 85 Z28 and Changing a '165 ECM to a '730
Joined: Jul 1999
Posts: 12,100
Likes: 127
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Originally Posted by firebirdjosh
Oh ok. Well for anyone else confused/intriqued here's the website I used with step by step directions of what's needed for the swap and how to do it. Can be done in an hour if you plan it out and are good at wiring.
My 85 Z28 and Changing a '165 ECM to a '730
My 85 Z28 and Changing a '165 ECM to a '730
-- Joe
Thread Starter
Supreme Member
iTrader: (1)
Joined: Oct 2004
Posts: 3,361
Likes: 2
From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
I have a spare small cap distributor, my stock coil, and wiring if you're looking to swap. The car's not on the road yet so I didn't have a chance to really test it out. It's an easy swap too, I did it becuase the stealth ram and a large cap was a big no-no.
Junior Member
Joined: May 2006
Posts: 23
Likes: 0
Car: 92 longbox s10
Engine: 305tpi
Transmission: 700r4
Axle/Gears: 3.42 posi
hate to sound ignorant but i am rather new to this tpi stuff. my maf or mas system appear to be buggered and i wanted to switch to sd anyhow. will thie setup work on an 85? i know it works on an 86 but the maf burnoff relay is quite a bit different. let me know as im very interested
Junior Member
Joined: May 2006
Posts: 23
Likes: 0
Car: 92 longbox s10
Engine: 305tpi
Transmission: 700r4
Axle/Gears: 3.42 posi
hey man, just figured i'd let everyone know the chip works great, one question though. you said it was "bit flipped" to change the vss from 4000ppm to the older style buffered 2000ppm correct? i need to order a speed sensor and im not sure which one i need
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