Undefeated

Motivator 250 extractors dual bolt patterns ?

4 posts in this topic

Motivator NHM 550 extractors off my XE..

this my new build , it’s as old as the hills and hasn’t seen the streets for 20years..(126k the clock I think is genuine, there’s no rust in the car, but it’s body has been bumped around a bit)

Anyway, I pulled these old Motivator extractors off, they  look mandrel bent, no kinks..even turns, not bad I guess..better than the genie press bent stuff I’ve seen..

6 -3-2 design I think.. merged into a 2 1/2” pipe.

I pulled them off to go to my ceremic coater with some other stuff on this years build, and  I noticed there’s a dual pattern bolting flange.

Question is whats the  other motor they fit?

I’m guessing it’s the Iron head, but only other thing I can think off is the XG 4.0.

 

Are the port spacing the same on the 250 crossflow and 4.0 OHC exhausts, Bottom bolts the same but the top has 2 different bolt flanges..? The iron head was different wasn’t it?  Iron head or OHC 4.0??

xg is all I can think if it’s not that heavy old  iron head? 

Ran the part number and nothing on google..

I think Motivator Extractors was Lukey or Walker.. I can’t even find any info on that..one person said there pacemaker.. 

stummped atm , they look ok, but just curious before I send this lot off for some shinny coating.

 

 

 

Share this post


Link to post
Share on other sites

Bore spacing should be same for OHC and crossflow engines as the blocks (initially) used the same crankshaft. Without a photo it's too hard to guess what you have.

In a brief description, iron head flanges have the bolt holes on each port at the same position for all 6 of them. Alloy heads have the bolt holes on ports 1-2-3 at 11- and 4- o'clock to the port centreline, and 4-5-6 are mirror-flipped to 1- and 8- o'clock respectively.

3.9/4.0 OHC went back to the iron head configuration (equal positions to each other) but of course they had to make them different so they don't interchange. They're placed at 11- and 5- o'clock so maybe the top bolt hole lines up with the iron head?

Only one way to find out I guess. The E-series did have a few different objects to get around ie: steering shaft, engine mounts, no starter on that side, etc. So dunno if they actually make a hybrid set of headers for all Fords. Would make sense to cut the costs of jigging, etc.

Sent from my CPH1607 using Tapatalk

Share this post


Link to post
Share on other sites
Guest
You are commenting as a guest. If you have an account, please sign in.
Reply to this topic...

×   You have pasted content with formatting.   Remove formatting

  Only 75 emoticons maximum are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

Loading...