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  Newbie EFI selection question S/D or M/A

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Author Topic:   Newbie EFI selection question S/D or M/A
4Zsnow
Journeyman

Posts: 51
From: Western Washington, USA
Registered: May 2002

posted 05-09-2002 03:55 PM     Click Here to See the Profile for 4Zsnow     Edit/Delete Message   Reply w/Quote
I know this has been more than beat to death. I could not find any older posts on the subject so here is a quote from a post I made on another list here at m&m.

I have a short block from a '89 5.0L roller cam. I will be running around 9.5 compression with aluminum heads.
I want to go with a factory efi set up. The question I have is: Mass air is prefered from what I understand, would I be better off finding a mass air system or would I have good results up-grading a speed denisty system? Which would be the easier on pocket book?
I see that the big catalogs sell upgrade parts and wiring kit for s/d systems and s/d systems are easier to come by.


TIA

4Z

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God Bless Big Oil

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68stang351
Gearhead

Posts: 267
From: Savoy TX, USA
Registered: Mar 2002

posted 05-09-2002 09:47 PM     Click Here to See the Profile for 68stang351   Click Here to Email 68stang351     Edit/Delete Message   Reply w/Quote
Mass Air adapts to modifications so much easier. It may cost more, but in the long run you'll come out better. Because if you use speed density and plan to modify it, chances are you'll end up switching to M/A anyways because the S/D won't adapt right because of the way the air flow is measured. I suggest getting aftermarket MAFS in the first place if you know it would be upgraded later. But if you want a stock one, I have one that I would part with.

Definitely go with Mass Air. I've heard too many times of people spending money on the car to make it faster and the speed density not adapting right.

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Hoofbeats are louder than Heartbeats!
68 Coupe, soon to have 351W and 5speed.

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4Zsnow
Journeyman

Posts: 51
From: Western Washington, USA
Registered: May 2002

posted 05-09-2002 11:25 PM     Click Here to See the Profile for 4Zsnow     Edit/Delete Message   Reply w/Quote
68stang351
I want to thank you for your input.
I have not figured out what cam I am going to run yet but more mods are down the road (can you say forced air.......had to see if my wife was looking over my shoulder) after it is running. One step at a time. Just getting this thing in a all the bugs worked out is the fist step.
I will step up my serch for a M/A and not waste time looking at the S/D up grade issue.

The ideal way would be to find a roll-over that was totaled by an ins company and park it in my drive way, then canibalize it. 'cause I want the serpentine set up as well.

You said you had a stock MAFS, is that: mass air flow sensor or system?

Many thanks,
4Z

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God Bless Big Oil

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Moneymaker
Administrator

Posts: 19611
From: Lyons, IL, USA
Registered: May 99

posted 05-10-2002 09:50 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
We have a FMS (FRPP) mass air conversion kit for sale cheap if you choose to go that way.

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Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator

NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
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Part time secret agent license #0089
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4Zsnow
Journeyman

Posts: 51
From: Western Washington, USA
Registered: May 2002

posted 05-10-2002 11:41 AM     Click Here to See the Profile for 4Zsnow     Edit/Delete Message   Reply w/Quote
Moneymaker,
Hold that thought. I know a guy that has a S/D system for sale at 100 bones. I haven't seen a pic of it yet, I am going to ask now for one.
In this kit you have f/s. I checked in FMS catalog and they have one with comp, intake tubes, sensor and a braket. Jegs has a "cobra" kit that has injectors included and a wire harness., but twice the cost.
What is in your kit you have? Used, new?

4Z

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God Bless Big Oil

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68stang351
Gearhead

Posts: 267
From: Savoy TX, USA
Registered: Mar 2002

posted 05-10-2002 06:00 PM     Click Here to See the Profile for 68stang351   Click Here to Email 68stang351     Edit/Delete Message   Reply w/Quote
If you're making other mods, I would check out the FRPP setup he's talking about instead of stock parts. I'm not just trying to pawn off my parts on you. What I meant was the mass airflow housing and sensor. On the serpentine belt system, I'm doing the same thing on my 351W thats going into my 68. I have no p/s or a/c so I had to order a a/c / p/s delete kit by march from Jegs and replace the tensioner pulley with a ribbed one (cuz it was relocated) Autozone part # 45971, it's the same size and everything. What car is this going into? If you want to start with stock parts I also have 19# injectors, rails, and harnesses from a 89 m/a 5 speed and the p/s / a/c bracket. I hope I've helped you in some way.

------------------
Hoofbeats are louder than Heartbeats!
68 Coupe, soon to have 351W and 5speed.

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4Zsnow
Journeyman

Posts: 51
From: Western Washington, USA
Registered: May 2002

posted 05-10-2002 07:05 PM     Click Here to See the Profile for 4Zsnow     Edit/Delete Message   Reply w/Quote
Thanks man. I have a line on the serpentine stuff local, kind of a grab bag, he said everything was there. I will be installing a/c on it, 'cause it came from factory with it. Just need to find all the parts. As for what it is going on? Well, being a stang fan at heart, I did a frame up resto on my...get this...'81 f-150 XLT stepside. I already have a crate 302 HO non-roller from FMC that I put in it 7 years ago. I have SVTf-150 and FLARESIDE badges on it cuz I gave it a '92 flareside bed when I did all the body work (only the cab hasn't been replaced bodywise).
Recent additions in the last 6 months are headers and custom 'y' pipe and H/F cat. C-6 and t-case over haul on Thanksgiving weekend. I did some mods to tranny as well. Interior is all customed and the only thing left is this new motor. I will be giving it a 4 core radiator (already has elec fan) and just detailing out the engine comp. I am running out of things to do to it after the motor conversion. Both axles have been gone through with a possi upgrade to the 9". After the motor I might put some DANA 60's under it? I dunno. My wife is getting tired of her hottub money going into it for the last 7 years!
The best thing of all, is that I did every bit of work on this truck minus the paint job, oh yeah I droped off my 3rd member at a driveline shop to have it rebuilt. The front axle (4wd IFS), suspension, frame, tanny all of it I did. Anyway, my arm hurts from patting myself on the back. So, I'll give it a rest.

As soon as this fella with the s/d system gets back with me I will make the dicision if that unit is the one I will buy, then give moneymaker a shout on that conversion to m/a.

I am very thankful for all of the input you nice folks have given me. It is far easier to draw from the well instead of waiting for it to rain!

And it 'aint over yet.

Take care

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