Going from MAF stroker motor, back to Stock 351w Speed Density.. Questions?

[B-man]

Okay, before this even starts.

I deeply am thankful for any information I can gain from this thread. Much respect.

What I don't need in this thread is why am I doing this. I will tell everyone why..

I never should of built a stroker motor for my rig. That's it.. Nothing else. I opened a can of worms. Been 3yrs and now it is back to stock and SD for me.

Now, here is the deal.

I am getting a 95' roller motor to install in my rig. I have some concerns.

I am putting my rig back to speed density, that means repinning the ECM.

I had the rig set up for MAF when I installed the stroker motor.

With a roller motor and me having 1990 wiring, an MSD Distributor. Do I have to get a new gear for my Dizzy? Or, can I not use this dizzy now? I am researching that as well, this is just a great place for information, so I am including it.

I just was hoping for some information to make this install the least painful it can be. I know it's not going to be a walk in the park. I just haven't dealt with a roller motor before. How different is it from a non roller?

Thanks for any information.

[birch]

Hi without asking you why. Is it a big mistake to put a stroker in thats been built by a shop. I am currently looking at buying one using stock to mild cam. OR was it in the building process I dont want to be on that boat. Did it have more power?

[B-man]

Originally Posted by birch

Hi without asking you why. Is it a big mistake to put a stroker in thats been built by a shop. I am currently looking at buying one using stock to mild cam. OR was it in the building process I dont want to be on that boat. Did it have more power?

From what I have gathered, it depend on how big you wanna go. There are many threads on this in here. Just search "stroker" and they will pop up.

I was going to need injectors possibly, someone who can tune using a Moates QH and a wide band emulator. I don't have the cash for all that.

my problem was not enough research was put in by me prior to going with a stroker motor. Had I known all of what is entailed. Hell no, I wouldn't of done it.

[Swat]

You can use that dizzy but will need to change the gear to a steel one for the roller cam.

[B-man]

Cool, thanks


I am using the entire roller motor, so, I "hope" when I get the metal gear, I will be golden.


I was checking out Summit. Man, sure some pricey gears there.

Would this one work? Or, Do I wait until I have the cash for a more expensive one?

http://www.summitracing.com/parts/ma...rd?prefilter=1

[Caddylackn]

It looks like that is the right gear for the 5.8 L , but I don't trust the Summit catalog. It says that this gear will also fit the 5.0 but I know it will not fit my 5.0 distrib. I have the 0.47" diameter shaft :

Have you thought about going carb? Seems like most 351W stroker motors go to a carb for simplicity and cost. MAF tunes, bigger injectors, big bore TB, and high performance F.I. 351 intakes are pretty pricey. You can get a 351W high performance non F.I. aluminum manifold, a non F.I. distrib., and a 750 holley carb for like $300 on craigslist.

[Seattle FSB]

B-man, are you saying you have an MSD 8453 with Distributor Mounted EEC-IV TFI ICM and an Iron Distributor Gear? And you now need a Roller Distributor Gear? If so, I have a gear that I can send you. Send me PM.

[Kingfish999]

if you have it setup for MAF, why not keep it MAF instead of turd SD?

[B-man]

Originally Posted by Seattle FSB

B-man, are you saying you have an MSD 8453 with Distributor Mounted EEC-IV TFI ICM and an Iron Distributor Gear? And you now need a Roller Distributor Gear? If so, I have a gear that I can send you. Send me PM.

Yes. That is the MSD I have in the rig now. Thank you!!! Sending PM!

Originally Posted by Kingfish999

if you have it setup for MAF, why not keep it MAF instead of turd SD?

Tuning issues would be why, I have a 95 5.0 ECM but I will have a stock 351w going in. Wasn't sure if that would be an issue. Seems it has all been an issue since the change to stroker motor, E40D and MAF setup. I figured since I had the 5.0 ECM with the 5.8 motor, the fuel tables would be off along with the AFR.. So, I thought I would go back to SD. Which, by no means was a dog for me before. Gave me enough grunt and go.

[JBfab]

Your 5.8 will run on the 5.0 computer just fine. Granted it wont be the best tables but it will run again just fine. Im running the 5.0 comp on my 5.8maf with no issues, only because i havent found a 5.8 maf manual comp yet. Just plop the new engine in swap that gear then plug and play.

[Swat]

You could sell the MAF swap harness along with the Moates stuff to someone who needs it. Speed density is fine.

[B-man]

Originally Posted by Swat

You could sell the MAF swap harness along with the Moates stuff to someone who needs it. Speed density is fine.

That was my plan. Course, I just rewired my existing wiring. Added wires to it. I didn't have the harness.

[m-unit]

not that you are going to, but I just did a 5.8 with 5.0 maf pcm conversion and it is working well.

So it is possible without any messing around.

otherwise I like the sell what you have and get an SD harness for your conversion back idea

[Diabolic]

Without correcting for the cubic inch increase the load scaling will be off. This effects spark and fuel tables.

[Swat]

Originally Posted by B-man

That was my plan. Course, I just rewired my existing wiring. Added wires to it. I didn't have the harness.

In that case, why not keep it MAF but get a 351W E4OD EEC. MAF is better and you won't have to rewire it. Plus you could likely get something out of the 302 EEC. If you stay MAF, if the bug strikes again, you could add heads and intake without tuning.

[B-man]

No bug will be coming here.

SD is fine with me. I have other things and hobbies I want to get into...

[B-man]

I have a question.. Is there a different firing order between a roller motor and the usual flat tappet hydraulic motor?

[TS 90F150]

Originally Posted by B-man

I have a question.. Is there a different firing order between a roller motor and the usual flat tappet hydraulic motor?

On a 351? No, all 351W have the same firing order.

The difference comes in on the 302 with the "HO" roller camshaft starting in the Mustang in 1982. The roller truck 302s have the "new" 351 firing order.

I know this was more info than you asked for, but hope it helps anyway.

tim

[B-man]

Originally Posted by TS 90F150

On a 351? No, all 351W have the same firing order.

The difference comes in on the 302 with the "HO" roller camshaft starting in the Mustang in 1982. The roller truck 302s have the "new" 351 firing order.

I know this was more info than you asked for, but hope it helps anyway.

tim

Never can have enough info when dealing with these rigs.

I have learned that.

Thanks for the info!

[B-man]

Okay.

For some reason in my area, I can't find any machine shop that will install the new gear I have on my MSD Dizzy.. It's getting really frustrating..

I wanna do this the right way and not attempt this myself.

Course, what I am asking now is probably not the brightest idea either..

Is there a way to use the 95 dizzy on my rig? All my shit is back to 1991, so, wiring is different. I was just wondering if I could possibly rewire it to work?

Or,, could I take my MSD guts out and put into the 95 dizzy.??

I am assuming no on both. Looks like I could possibly be looking for another dizzy.

Any help is greatly appreciated. I am close to getting this sucker back together. Yay for me.