1/2" spacer... www.motordyneengineering.com is one version of it (common)

 

So is the 1/2 better then the 5/16?

 

Supposedly the 1/2 is better for high RPM's while the 5/16 is better for mid range. Which one is better, well that's for you to decide. Pretty much ask yourself how you drive and pick the proper spacer. 90%+ of the time I'm daily driving so the 5/16 (mid range) works best for me.

 

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Look what I found yesterday, looks like I already have a spacer ^^

 

^ yes you do, looks like a 5/16th

 

Yes I was so stoked to find that. Now I just need to replace the camshaft sensor get some test pipes and possible a pop charge filter.

 

I don't understand how there can be such a difference just by the manufacturer? Any feedback here? I understand the materials are different, but is the blox is also thermal,and NASA quality for heat, then why the difference? If it let in more heat,higher temps could make a difference,but i don't see that being possible here?

also,why do some kits come with the manifold gasket when you buy the plenum spacer,and some don't? is that a must to change when doing this upgrade?

Anyone feel free to chime in on this.

 

I used to have the BLOX - its made from ABS (thermal plastic) which prevents heat from transferring up.

My upper plenum was always cooler than when I had my Motordyne 1/2"

The difference of the plenum spacers is size mostly - the smaller size actually flows air better

The gaskets are all about heat exchange - they help but not much and not worth the price IMO - since i have them

 

How are these very different results possible?

 

Xxx