Well, the subject says it all. I was looking on fords racing site for the mass air conversion kit for the 351 but all I found was the kit for the 302 and a kit for the 351 lightning. Will the 302 kit work on my truck?

 

I would think it should. I've got a '99 copy of the SVO catalog, in which they list part# M-9000-T50 as the kit for 1987-94 F-Series 5.0L/5.8L EFI truck only, manual trans; with part# M-9000-T51 being the kit for 1987-94 F-Series 5.0L/5.8L EFI truck only, automatic AOD trans. Both are listed with a footnote to "call the Tech hotline for modification instructions for 5.8L." Shouldn't be that big a deal, and it looks as if they have the 5.8L covered with the same kit as the 5.0L.

 

The system will work on both engines. A least I hope because I getting ready to replace my 302 with a 351w. Main thing that has to be done is changing the injector firing order.
302 fir order: 1 5 4 2 6 3 7 8
351 or 302HO : 1 3 7 2 6 5 4 8
If you put an HO cam in 302 you have to do the same thing. I put an E cam in mine. Had to trace 5,3,4,& 7 and cut and switch 5 and 3 then 4 aand 7.
Pat
93F150SC 302
MAF conv,MSD6,Crane 2020 cam(now)

 

Wrenchman46:

You've probably already answered my question, as you've stated you're changing out your 302 for a 351W, but..... what is your opinion of the 302HO (in a truck) with the E cam? Is it worth having? Or, in the case of changing out a stock 302EFI, should I just plan on stroking it or swapping for the 351W?

 

You can use the one off a 302. The firing order's were the same for both in 1994+ when they went to mass air in automatic transmission.



'93 F-150 loaded and modified!

http://briefcase.yahoo.com/toydestroyer1

 

OK Guys
I have a 93 F150 5.8W/3.55 with the E40D

How do I convert to Mas Air

 

[updated:LAST EDITED ON 24-Jan-02 AT 10:55 PM (EST)]As for using the Ecam you had better plan on staying over 2500 rpm. I put one in my 306 and around town would not get out of it's own way. I had to get down on it hard to go. Once it hit about 3000 it would take off. But for crusing around at between 1400 and 1800 rpm it had no go at all. As for cam decide what range of rpm u will be running in most often and choose accordingly. I changed the E out for a Comp Cam 2020 and it was a lot better low end pull.(Had to recut and resplice inj).
Pat

 

Thanks for the info!

 

FYI

When the swap is made from a 302 to 351w or 302 HO you do not need to swap the injector leads. To change the fireing order all you have to do is change the spark plug leads. Sequential injection fires fuel several times into each valve chamber before it releases it into the cylinder (its somewhere around 50x at 2500 rpm's). So if the injector leads are not switched you will not notice any difference..... I can't stand the thought of having to cut and splice a stock wiring harness.................

 

[updated:LAST EDITED ON 27-Jan-02 AT 11:17 PM (EST)]If I understand correctly the bank fire system (speed density) fires multiple times each timing cycle. The SFI system fires as the air charge is entering cylinder. I was told that I didn't have to swap injectors but to get the best mixture in each cylinder it is better to have the fuel injected into a flowing air stream instead of dead air waiting for flow.
Pat

 

I called the ford techs themselves and that is what I was told.. I was told with speed density you would need to change the injector order because of the two pistons in question would be switched to opposite banks. But on mass air there wouldn't be any difference in performance/reliability gain to do it.

I have had mine in the stock 302 order since I put the new 302 in. I have the 302 HO roller motor with mass air and it runs great so far...

 

Thanks for the info. I won't do it again when I put the 351w in. I leave them where they are and give them a try.
Pat

 

Yes! It does work because I put MAF on my truck ('88 F-150 351W). If you need, e-mail me and I can give you detailed instructions on how to do it with very little trouble (30 minutes) and a soldering iron.

 

I keep getting told that I can not swap the 302 efi with the 302 HO. I have a 92 HO roller motor with a B303 cam which I was going to change to the stock HO roller cam but was told even that is too much for my 91 Bronco. I thought that the MFI fired the injectors in banks right and left and that you did not have to alter harness that if it was SFI you would have to alter the injector firing order. I was going to swap truck intake onto the HO motor and was told by the jackass that sold it to me that it was a simple swap he had done 10 of them without any problems. Then I get all this other stuff dropped in my lap. Any help is greatly appreciated. I have an E4OD trans.

 

check out www.thunderbolt-motorsport.com for a cheap MAF conversion kit. I spent an hour with a tech on the phone who convinced me to stay speed density and just change my cam since I wans't looking for a big HP gain but for those of you looking to swap you owe it to your self to give these folks a call and compare prices, I was shocked by the difference in price.