Did the 06 6mt sedan come with the revup or is that still the 280 non-revup. If it's revup, i think your gains might be minimum and it's your butt dyno playing a trick on your mind.

 

the 6mt has 298hp motor rev up...

 

Hah! I quoted the wrong post...

 

I don't think there's much gain with the revup motor. Maybe it's your mind playing trick on ya

 

ya could be, it wasnt an expensive mod............... now if i spent 4-500 on a isotermal and didnt get much id be alil upset...

 

I completely agree.

 

I can't wait to install mine!!!!

Still waiting on my Ztube.

 

hey guys i have blox spacer for sale. pm me if your interested

 

The spacer alone on a Revup engine doesn't do much, you really need the modified lower plenum.....MREV.....or a non-revup lower plenum to get the most out of it. I too think your butt dyno is playing tricks on you.

4-500 for an isothermal spacer? wow, where are you shopping? It's $220 for the 5/16 and $295 for the 1/2".

 

Hey, why is the BLOX spacer so much cheaper than the motordyne one...
Do you get the same gains from both?
the motordyne 5/16 spacer is around $200 - $230
The BLOX 5/8 spacer is $100

 

QUALITY.

The difference is alot like the differences in exhaust systems.
China made exhaust systems easily cost 1/4 to 1/2 as much as Japanese or American made exhaust systems. All exhaust systems are made of bent pipes but when you look closely at both, the differences and details become apparent.

It would be easy to cut spacer manufacturing costs to 1/4 by outsourcing all the manufacturing to China, but Motordyne would never do that. The Motordyne niche is in quality engineering, reliability and 100% customer service.

Blox and Motordyne are worlds apart in these areas.

Sometimes cutting corners won't result in adverse affects. Sometimes it does.

When quality control is not strictly maintained it can results in things like this.
http://www.my350z.com/forum/showpost...3&postcount=13

Quality, reliability and customer service is Motordyne's top priority.

.

 

Wow...
thanks for the info i had no idea they were only plastic.
ill buy motordyne for sure.

 

wouldn't plastic be a better insulator for heat? Isn't that one main point for the spacer?

 

^^IIRC it provides better air flow to the front two cylinders.

 

Yes, but there are significant differences in the overall thermal design that affect plenum heat soak.

The Skunk and Blox plastic spacers only provide thermal isolation to the upper plenum.

The Motordyne Iso Thermal and Copper Iso Thermal provide thermal isolation to both the upper and lower plenum.

The lower plenum has much more total exposed surface area than the upper plenum. The lower plenum also has intake runners with much higher flow velocities, higher turbulence and thiner boundary layers. Overall, the total heat transfer is much less when the upper and lower plenum are both thermally isolated.

There is also one other important issue to consider that the plastic spacer companies do that Motordyne would NEVER do. (Leave the throttle body unheated when driving in very cold weather.)

Nissan (Infiniti) intentionally heats the throttle body for safety reasons. This is to insure the throttle body doesn't get iced up when driving in very cold or snowy weather.

If for example you were driving on the freeway in cruise control for ~20min in very cold or snowy weather, an unheated throttlebody could have ice buildup inside of it causing the butterfly valve to be frozen to the open position.

So when you tap on the gas to release the cruise control, the ECU will try to close the throttle body and stop fuel flow to the engine. But if the butterfly valve is stuck in the open position, air will continue to flow into the engine causing lean out and stalling. This of course would never be a good thing to happen while driving.

Every throttle body, in every car, of every major automotive manufacturer in the world, the throttle body is heated specifically to avoid this condition. It is a corner that should never be cut. Its a corner Nissan doesn't cut. Its a corner Motordyne doesn't cut.

1) The Motordyne basic spacer keeps the entire plenum hot all the time. (just like stock)

2) The Motordyne Iso Thermal is switchable. It heats the throttle body only when you need it. But the CCV must be switched on when it gets cold outside. If you live in a place like California, Florida, Texas or Hawaii the regular Iso Thermal is a good option.

3) The Copper Iso Thermal is fully automatic. Just install it and forget it. It always gives the best results without adjustment and is always safe. If you live in Alaska, New York, Canada, Montana, Colorado or any place where it gets similarly cold... use the Copper.

The thing to take from it all is that Motordyne Iso Thermal spacers have a lower overall heat transfer than the plastic spacers and they don't introduce the risk of throttle body freezing.

Iso Thermal is one of many other engineering details where design quality makes a difference.