My motor is going back together soon and im looking to put a spacer in while its apart. Any opinions on the best spacer for FI at the 600whp ish level. Should I get the AAM, 1/2 " motordyne, 5/16" motordyne ? Height is not much of an issue i'm not afraid of loosing my strut bar. Thanks Dave

 

i had aam with tons of gains.. for sale, btw for cheap! no clearance issue with the strut,either.
https://my350z.com/forum/showthread.php?t=253677

 

Yea all this MREV2 or + lower plenum and 3 different type of spacers is driving me nuts too. From what I have seen while searching on this site the motordyne series did better in the Sports Z shoot out however this is just a overpriced piece of metal that rasies the plenum hight so really I don't expect much diffrence between any of them.

Most people seem to opt for the cheapest one they can get there hands on and I don't blame them.

Look here for some information.
http://motordyneengineering.com/dynos.asp

 

For 600hp, spacer is not gonna be much of an issue.

Motordyne is what I use until the Cosworth gets here.

 

We have installed the motordyne MREV2 + iso spacer setups and customers seem to like them. In addition the the power gain, it gives the car a nice deeper growl. I have these in stock if you need.

 

Before I went FI, I noticed immediate gains with the Motordyne 5/16 spacer and isothermal gasket. One thing I really like about the isothermal kit is the coolant block off valve to stop hot coolant from warming the throttle body.

 

Returned PM.

 

Yea the coolant block off def caught my eye, I was just gonna remove the hoses and block off the openings with some weld. But if this comes with a valve it will be nice to open it up on those cold Buffalo mornings.