Originally Posted by rickreeves1

I copied and pasted everything below from another post I had. My car is a daily driven street car. I drag race a few times a year and run it on the road course now and then. Some others have recently reported that they prefer the mechanical pump if in extremely high temp climates and if auto-x or road racing. Since the install, I have not been in either of those situations yet. I think it is perfect for a street driven weekend drag car. IMO

I just installed a Meziere HD EWP about six weeks ago. It was a PITA for me but just because everything seemed to go wrong on the install. It should have only taken about 4 hours. If you pull the shaft and seal the timing cover like you are supposed to then expect it to take a lot longer. I'm waiting for the cam swap, opti swap, and Cloyes timing chain install to do this.

Factory mechanical pump installed. Belt, coolant hoses, MAF, and air ducts removed. The belt has to be removed to get to all the bolts. The coolant should be drained.


Old Mechanical pump and housing removed. Notice the two guides where the pump housing meets the block. The pump housing may need to be wiggled off some. I left the mechanical drive shaft installed for now. I was worried about it rubbing on the freeze plug but it doesnt. Others have reported that leaving the shaft in can create a leak at a later date. Some remove it and JB welded a .50 piece or freeze plug in place.


Mechanical pump guts need to be removed from housing. I used a punch and a 20lb maul. Lots of patients needed.


Mechanical parts that I removed from pump housing.


Seal plug installed. You will need to scrape off the old housing gaskets and replace with new ones.


EWP installed on housing.



Meziere Installed on car. Be carefull not to pinch or cut the vacum line that runs back up to the air duct. Mine was already cut from one of the pulleys.


Wiring Relay for Meziere.


Pink Wire used to switch on pump with Accessory-On key position.



The biggest change I noticed is that temps are always consistent. No more temps creeping up at a red light or in traffic due to consistent rpms. Other advantage is that you can run the pump by itself to cool off the engine between runs. Also + 7 to 10hp increase for switching to EWP. Future pump changes should now be much easier. I can just unbolt the EWP from the housing without removing the housing.

Originally Posted by Randy Munson

Is that an airfoil sitting in your throttle body????? Maybe there's an electric one of these as well

Originally Posted by rick lambert

Once again I don't care which way a person chooses to go, that's their choice.

I'm not however sold on Stricks post, simply because some guys have had Mezieres fail on them. Just like some guys have reported buying new fuel pumps, MAFs, alternators, ECMs etc. just to have them go bad quickly. I'm not knocking Meziere, or anyother MFGer of electric pumps, one thing I will say however is look at the rating (hours) on light bulbs, most have 1000 hours, but I've found few that last that long. I don't have an OPTI, so that's not a problem. And believe it or not Strick, it's cheaper to install some electrical components than mechanical. And I don't want to have to carry an extra pump just because it makes me feel secure knowing I have a replacement.I have close to 106K on my 87 with original WP.

Once again, it's personal choice, do what you like.