What are the down sides to the PLENUM SPACER!!!!
Originally Posted by Ruthless18x
+1 and make sure you install it correctly because leaks can happen easy if you **** it up
I messed up the install by not torquing things down right.https://my350z.com/forum/intake-exhaust/299010-5-16-md-plenum-spacer-installed-having-idling-problems.html
Make sure you torque everything down correctly and use the loc-tite supplied in the kit. You won't have any problems if the directions are followed
Originally Posted by Hydrazine
Hi David,
I actually adressed that issue a while back with the new design.
In the early days yes, it was a stock gasket beneath the spacer and a stock gasket above the spacer. So yes, it had twice the chance for a leak (albeit very small)
But now, the spacer comes with custom gaskets bonded to the upper and lower surface of the spacer. So now the spacer itself becomes sandwiched in as part of the gasket. Its essentially now a 5/16" thick gasket all by itself.
So its no longer 4 surfaces to seal, its 2. Just like stock.
The gaskets applied to the spacer are also very thick and compliant so they actually seal better than the thin stock metal gaskets.
Assuming the spacer is installed correctly, I guarantee this new design will never leak.
I actually adressed that issue a while back with the new design.
In the early days yes, it was a stock gasket beneath the spacer and a stock gasket above the spacer. So yes, it had twice the chance for a leak (albeit very small)
But now, the spacer comes with custom gaskets bonded to the upper and lower surface of the spacer. So now the spacer itself becomes sandwiched in as part of the gasket. Its essentially now a 5/16" thick gasket all by itself.
So its no longer 4 surfaces to seal, its 2. Just like stock.
The gaskets applied to the spacer are also very thick and compliant so they actually seal better than the thin stock metal gaskets.
Assuming the spacer is installed correctly, I guarantee this new design will never leak.
https://my350z.com/forum/intake-exhaust/297830-is-this-a-new-motordyne-spacer-design.html
noticed slight gains at the top end 4.5k rpms to 7k after my and a friend installed the isotherm 5/16" spacer on the Z. Install was straight forward, the most annoying/time consuming parts of the install were getting all the clamps on the little hoses back on, and the strutbar removing/installation. Thanks Tony for the washer size information once again and a great product!
Originally Posted by kacz07
why does MD recommend the copper spacer for places with snow? do i have to pay 50 bucks extra?
1) with the copper you don't have to switch any valve on or off.
2) with the copper when it does get very cold, you don't have to heat the whole plenum to keep the TB warm. Therefore, you get a much bigger advantage of the very cold air your engine is inhaling.
If you get the regular Iso Thermal with the CCV you will have to turn on the valve when it gets really cold outside. You don't want ice formation on the TB butterfly valve. Ice on the TB can cause stalling so that is why the TB must always remain above freezing.
I hope this helps.
Tony
Originally Posted by kirradude1025
has anyone tried this with a greddy strut bar? and do i need a torque wrench for plenum install?
Obviously didn't read a couple post up..
Originally Posted by kirradude1025
has anyone tried this with a greddy strut bar? and do i need a torque wrench for plenum install?
search for greddy strut bar and plenum spacer. i run them both and they work great together, however, i had to add another 1/4" of washers under the driver side to clear the plenum for some reason. best bang for the buck IMHO. i got a torque wrench because i am **** about that stuff. you can go finger tight if you are comfortable with it.
Originally Posted by kirradude1025
thanks. ima check into the spacer concept further. i see a lot of people are having trouble with this. i am not sure if it is worth the possible hassle. thanks for the post
Originally Posted by Hydrazine
Hi David,
I actually adressed that issue a while back with the new design.
In the early days yes, it was a stock gasket beneath the spacer and a stock gasket above the spacer. So yes, it had twice the chance for a leak (albeit very small)
But now, the spacer comes with custom gaskets bonded to the upper and lower surface of the spacer. So now the spacer itself becomes sandwiched in as part of the gasket. Its essentially now a 5/16" thick gasket all by itself.
So its no longer 4 surfaces to seal, its 2. Just like stock.
The gaskets applied to the spacer are also very thick and compliant so they actually seal better than the thin stock metal gaskets.
Assuming the spacer is installed correctly, I guarantee this new design will never leak.
I actually adressed that issue a while back with the new design.
In the early days yes, it was a stock gasket beneath the spacer and a stock gasket above the spacer. So yes, it had twice the chance for a leak (albeit very small)
But now, the spacer comes with custom gaskets bonded to the upper and lower surface of the spacer. So now the spacer itself becomes sandwiched in as part of the gasket. Its essentially now a 5/16" thick gasket all by itself.
So its no longer 4 surfaces to seal, its 2. Just like stock.
The gaskets applied to the spacer are also very thick and compliant so they actually seal better than the thin stock metal gaskets.
Assuming the spacer is installed correctly, I guarantee this new design will never leak.
Registered User
Joined: Oct 2012
Posts: 2
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From: Oklahoma City
currently have exhaust & intake, what gain in hp does it give on a dyno with a 5/16 copper plenum spacer approx? 
Registered User
Joined: Jun 2012
Posts: 477
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From: San Antonio, TX
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