How To Switch to Speed Density from MAF
Thread Starter
Burning Brakes
Joined: Apr 2001
Posts: 992
Likes: 0
From: Atlanta GA
How To Switch to Speed Density from MAF
Does anyone know what is involved to make the change to SD from MAF?....I need the parts and what all I have to do...Please if anyone can help with this....Where can I locate the parts I might need for this....
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: How To Switch to Speed Density from MAF (apollo30346)
I'm not sure of the complete list but at least:
-'90/'91 ECM & calpac and wiring (or partial wiring)
-MAP sensor
-'90 or '91 intake duct (if it will fit between your '88 air filter & TB)
-Cold start injector block off (not necessary but a good idea)
It would be a good idea to pick up a '90 or '91 GM Shop Manual to go with your '88 version so you can do an exact comparison of ECM wiring.
If you can't get the parts on our Forum or E-Bay, you might try Contemporary Corvette (link on my site) as they have a large Vette bone yard in eastern PA.
-'90/'91 ECM & calpac and wiring (or partial wiring)
-MAP sensor
-'90 or '91 intake duct (if it will fit between your '88 air filter & TB)
-Cold start injector block off (not necessary but a good idea)
It would be a good idea to pick up a '90 or '91 GM Shop Manual to go with your '88 version so you can do an exact comparison of ECM wiring.
If you can't get the parts on our Forum or E-Bay, you might try Contemporary Corvette (link on my site) as they have a large Vette bone yard in eastern PA.
Burning Brakes
Joined: Apr 2002
Posts: 1,126
Likes: 0
From: Cleveland OH
Re: How To Switch to Speed Density from MAF (apollo30346)
Does anyone know what is involved to make the change to SD from MAF?....I need the parts and what all I have to do...Please if anyone can help with this....Where can I locate the parts I might need for this....
Ron
Melting Slicks
Joined: Aug 2000
Posts: 2,388
Likes: 42
From: Murrysville PA
Re: How To Switch to Speed Density from MAF (RonRed89)
:iagree: Save yourself the trouble and stick with MAF. I switched when I was trying to tune my Miniram. I now run the Super Ram and could probably switch back.
Team Owner
Joined: Sep 2001
Posts: 62,171
Likes: 1,735
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: How To Switch to Speed Density from MAF (apollo30346)
I dont see why you would want a SD system unless youre putting a SC on it.
MAF is more than adequate.
MAF is more than adequate.
Drifting
Joined: Oct 1999
Posts: 1,722
Likes: 0
From: Gloucester Va
Re: How To Switch to Speed Density from MAF (vader86)
Go to this link. it will answer all your questions.
http://www.eecis.udel.edu/~davis/gm-.../ecm_swap_730/
http://www.eecis.udel.edu/~davis/gm-.../ecm_swap_730/
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Burning Brakes
Joined: Feb 2004
Posts: 1,024
Likes: 0
From: Long Island New York
Re: How To Switch to Speed Density from MAF (vader86)
I dont see why you would want a SD system unless youre putting a SC on it.
MAF is more than adequate.
MAF is more than adequate.
Drifting
Joined: Mar 2002
Posts: 1,251
Likes: 2
From: Thomson Georgia
Re: How To Switch to Speed Density from MAF (apollo30346)
If you want to repin about 6 wires and take the MAF off and use the SAME ECU, use the Holden 808 program. I'm running it on my 89 and been 10.90 and get 20.0 mpg with it.
Wish it did get 200 mpg! 20 mpg
[Modified by johnnyevans, 10:16 AM 4/27/2004]
Wish it did get 200 mpg! 20 mpg
[Modified by johnnyevans, 10:16 AM 4/27/2004]
Thread Starter
Burning Brakes
Joined: Apr 2001
Posts: 992
Likes: 0
From: Atlanta GA
Re: How To Switch to Speed Density from MAF (johnnyevans)
I was wondering about this is I am thinking of a supercharger and am thinking ahead....and for a custom air intube with filter......If this is a bunch of money...I can put that to better use than this.....
Johnnyevans,
Tell me more about what you are talking about.....I am a little lost....what that stuff is...
Johnnyevans,
Tell me more about what you are talking about.....I am a little lost....what that stuff is...
Melting Slicks
Joined: Mar 2001
Posts: 2,150
Likes: 304
From: Timra, Sweden
Re: How To Switch to Speed Density from MAF (apollo30346)
An australian GM car with MAP uses almost identical hardware in the ECM (1227808) as the TPI ECM (1227165). You can put a 808 chip in the 165 and replace the MAF with a MAP. The MAP sensor connects to an unused pin in the 165 harness.
I helped a frined of mine with a turbo project on a 1987 350 IROC Camaro. We put a 2-bar MAP from a cy/ty on it and a tweaked 808 chip. It works great. You see the MAP sensor above the brake booster.
[Modified by JoBy, 7:53 AM 4/27/2004]
[Modified by JoBy, 7:54 AM 4/27/2004]
I helped a frined of mine with a turbo project on a 1987 350 IROC Camaro. We put a 2-bar MAP from a cy/ty on it and a tweaked 808 chip. It works great. You see the MAP sensor above the brake booster.
[Modified by JoBy, 7:53 AM 4/27/2004]
[Modified by JoBy, 7:54 AM 4/27/2004]
Burning Brakes
Joined: Dec 2002
Posts: 1,088
Likes: 0
From: Lakeland fl
Re: How To Switch to Speed Density from MAF (JoBy)
:iagree:
I agree with he 808 swap/repin. I believe from what I read you will need the memal from a 730 ecm for the knock sensor to work. Theres a plethora of info about this on TGO. Theres also someone there whos running a 730 SC and trying to write in a 2 bar map. I think hes making progress, and it sure would be nice if he gets it to work.
I agree with he 808 swap/repin. I believe from what I read you will need the memal from a 730 ecm for the knock sensor to work. Theres a plethora of info about this on TGO. Theres also someone there whos running a 730 SC and trying to write in a 2 bar map. I think hes making progress, and it sure would be nice if he gets it to work.
Drifting
Joined: Oct 1999
Posts: 1,722
Likes: 0
From: Gloucester Va
Re: How To Switch to Speed Density from MAF (SBNova)
Your best bet apollo is to use something that was made to handle a forced induction charge, and SD. This is easy as well. convert to a TY/CY ECM. They are much the same as the 730, but are able to read a 2bar map and have provisions already setup for a turbo/supercharger. You can run this ECM without those items as well. here is a link that will give you the info
http://www.speedtoys.com/~bort62/7749/Main.htm
It's a 749 ECM and it will work fine in a vette.
http://www.speedtoys.com/~bort62/7749/Main.htm
It's a 749 ECM and it will work fine in a vette.
