Plenum spacers

[OCO0012]

does any one have any stats on the difference a plenum spacer makes to power economy and heat reduction? I got a 12mm spacer but I think did not put the gasket maker on properly, so there was a vacuum leak and freeway economy went from 10L per 100k too 5.5L per 100k.

 

[Commo Baba]

I would think the makers (Mace?) has some info.

Meanwhile your L/ 100KM say you're now getting almost double economy. Exceptional rate.

 

[OCO0012]

I would think the makers (Mace?) has some info.

Meanwhile your L/ 100KM say you're now getting almost double economy. Exceptional rate.

yah it was mace however it should not be that big a difference there was defiantly something wrong and was not running right because of it.

you were right mace did have some info
https://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/MI646

 

[OCO0012]

I would think the makers (Mace?) has some info.

Meanwhile your L/ 100KM say you're now getting almost double economy. Exceptional rate.

I think I have a bad fuel pump I took the spacer out and it had the same economy.

 

[Commo Baba]

How are you measuring the usage.?

Sender unit is a known weak point and you will find threads on it.

 

[OCO0012]

How are you measuring the usage.?

Sender unit is a known weak point and
you will find threads on it.

Car instant fuel, trip metre and at the pump

 

[Fu Manchu]

have these on both cars.
Noticeable improvement in drivability. Much more enjoyable, so nice for the money.
I haven't noticed any remarkable fuel savings.
The manifold is definitely cool to the touch when you've been out driving. Once the engine is off, the heat soak still happens, and it can be hot to touch after 30 mins or so with the engine off.

 

[OCO0012]

Hi what size spacer do you have I have the 12mm? I have noticed the engine being cooler but takes a lot longer then yours to be touchable.

have these on both cars.
Noticeable improvement in drivability. Much more enjoyable, so nice for the money.
I haven't noticed any remarkable fuel savings.
The manifold is definitely cool to the touch when you've been out driving. Once the engine is off, the heat soak still happens, and it can be hot to touch after 30 mins or so with the engine off.

 

[Fu Manchu]

I have both spacers in use.

The VZ has the 24mm.
The VE has the 12mm.
I'd love to have the 24mm on the VE but there wasn't enough room to fit it with the engines sitting closer to the firewall than on the VZ.