[8A_Honda]

Alright, the car I'm getting is an 88 and has Speed Density on it stock. I'll also be getting a 4 banger Stang that has a MAF on it. Eventually I'll be running with a Kenne Bell. Now I know that Speed Density is good for less airflow restriction but at the same time, might possibly be a problem if going with larger cams from the lack of vacuum at idle? And the MAF is better for tuning and going with the bigger cams but could be a restriction to airflow.

Which would ya'll suggest that I run? Also, if the car comes with Speed Density stock, what would be needed to convert it over and could I use the MAF out of the 4 banger car or should I get another all together? Thanks!

[hotrod88lsc]

You will need the computer out of an 89-93 5.0 Mustang, The MAF from the corresponding vehicle, stock maf and housing, and the harness to wire it all together. you CAN NOT use the 4cyl stuff.

[dr.gonzo!]

U can stick with speed density as long as you reprogram the computer. just make sure u are done modding the car. I think the kit to convert to MAF is around $500-$600 dollers. I have seen some auctions on ebay saying convert to MAF but all they are selling is the is one componet of the MAF system.

Here is the webpage for ford racing. you dont need to pay this price but It will tell you what you need and mabey you can go the junkyard route and save hundreds $

http://www.fordracingparts.com/parts...artKeyField=30

[8A_Honda]

Alright, thanks for the replies. Wondering if it'll work with a Kenne Bell S/C though if it's for an 88 which I guess wouldn't come with a MAF stock. Also, I'll be modding for some time to come. So I'm sure reprogramming will be needed pretty frequently. Anyone know of any good Piggy Back computers that are good with these cars? Not really wanting to go full Standalone. Wanting plain and simple. Thanks!

[shawn91stang]

http://cgi.ebay.com/ws/eBayISAPI.dll...MESE:IT&ih=009 this is my wiring harness!!

[hotrod88lsc]

use the stock computer and find a tuner thats close by and he can take care of it for you. plenty of my lincoln brothers have Speed Denisty and a KB

[8A_Honda]

Ehhh, I like to do the tuning myself. Wideband, etc. But wanna find the right stuff to use with the car. I'm a Dsm'er and use to things such as Dsmlink, Gm Maft, Vpc, etc. Don't know too much about Mustangs just yet. Would an AFC work on a Mustang? Something else? Something simple?

[hotrod88lsc]

tweecar, or PMS, Or you can get the SCT proracer pack

[hotrod88lsc]

Speed Density's major load detection is via the MAP sensor response to intake manifold vacuum levels\ changes.
When supercharging these engine control systems, the intake vacuum goes from negative pressure to positive pressure (boost) as the blower begins to build boost with increasing throttle body opening and RPM.
The MAP detects this and literally drives the computer to do things it normally does not do.
The only way to handle this condition is to build in an interfering block to the MAP sensor at the first sign of positive intake conditions.
Since the engine is being forced to make a great deal of extra power, the tMAP being near zero vacuum, will request the computer to max the fuel delivery as an indication of high load. This is right in line with desired operation.
However the MAP must not be pressurized into the plus region because it was not designed to handle pressure nor the computer input signal that would result.
In the Kenne Bell blower application, a special Map control unit has been developed that detects blower pressure and through the hose plumbing, re-routes the MAP line from it's normal lower intake areas to the blower's intake area between the throttle body and the blower itself thus meeting all the possible requirements for the MAP operation for detecting vacuum at all times especially during deceleration.
Working with centrifugal blowers and turbos would require the same considerations on a relatively stock engine and SD control.
It is my guess that nearly 100% of all centrifugal blower installations use a simple check valve, leak down alteration or some other form of MAP control that may not be the best they can do, when a boost control device could be used to better advantage.
Some other differences with centrifugal blower installations are that there is no clear intake/outlet vacuum conditions as there are with a positive displacement installations, so the handling of the MAP is less well defined.

[8A_Honda]

Well I had a T-67 turbo I had been trying to sell and the buyer backed out. So I figure screw it, I'll throw that on the car instead. I'll have to do more research on this of course. I'm very familiar with turbo setups, just not familiar with the best parts to get for Mustangs when it comes to that. That's what I plan to research though. Thanks for everyone's input.

[TT86]

If you are going turbo or SC. I guess you really need to lay out what you want out of the car, and how much money you have to spend. Are you looking for a simple kit to buy and install your self or are you looking to fabricate your own stuff?? I built my mustang completely from scratch including the computer system. I am running a MegaSquirt II stand alone EMS, which operates from a Speed Density standpoint. It utilizes an integrated MAP sensor that supports boost up to 21 psi (250 kpa). Here are a couple pics to illustrate the depth of what you are looking at getting into with Turbo fab and a decent computer to run it. My system completely replaces the stock harness and ECU. The cost of which is about the same as the MAF conversion kits offered @ 5-600 bones

[dr.gonzo!]

lucky

[JBIGBOOTSY]

TT86, I love the gatorade, I did that at the track after I diden't pass tech once.

[TT86]

Thats what happened some 5 years ago, I didn't pass tech once and now both of my mustangs got treated to Gatorade bottles and zip ties

[8A_Honda]

Originally Posted by hotrod88lsc tweecar, or PMS, Or you can get the SCT proracer pack

Good place to get these? And think I wanna do the MAF conversion cause of course I don't wanna have to start all over everytime I do a mod.

Also, will those work with an 88 that's not an OBDII? Anyone have pics of what these things are or website etc. so I know the functions, parameters, and controls? Thanks!

[8A_Honda]

Originally Posted by TT86 If you are going turbo or SC. I guess you really need to lay out what you want out of the car, and how much money you have to spend. Are you looking for a simple kit to buy and install your self or are you looking to fabricate your own stuff?? I built my mustang completely from scratch including the computer system. I am running a MegaSquirt II stand alone EMS, which operates from a Speed Density standpoint. It utilizes an integrated MAP sensor that supports boost up to 21 psi (250 kpa). Here are a couple pics to illustrate the depth of what you are looking at getting into with Turbo fab and a decent computer to run it. My system completely replaces the stock harness and ECU. The cost of which is about the same as the MAF conversion kits offered @ 5-600 bones

I wanna fab it up if I can figure out how to get it done and place to buy all the parts I need. Gonna use my T-67 to get the job done. I don't mind doing all the wiring, etc. but don't want anything that's too over my head. I bought the AEM EMS for my Talon and ended up selling it cause I didn't have the time to read over 300 pages on how to work the thing while working and going to college at night as well.

P.S. If at all possible, I don't wanna have to use a laptop to have to do all the tuning.