[street6]

Anyone have personal experience with lid spacer and/or blower spacer plates in regards to cooling? Currently running an LSX iron bock and was curious as to what kind of iat temps drops (thermal reduction) were gained from either a lid spacer, blower spacer plates, or a combination of both.

Let me know what you have experienced.
Thanks in advance

 

[mememe123]

Anyone have personal experience with lid spacer and/or blower spacer plates in regards to cooling? Currently running an LSX iron bock and was curious as to what kind of iat temps drops (thermal reduction) were gained from either a lid spacer, blower spacer plates, or a combination of both.

Let me know what you have experienced.
Thanks in advance

I have a 5/8 lid spacer, no numbers, but it does give you more volume and better flow to the rear cylinders, just from the looks if it, lol.
I'm sure @Rubber Duck can explain this much better.
Outside of larger HX + supporting mods and/or meth nothing else will provide drastic iat reduction, in my opinion.

 

[MeanMike]

I have a 1/2" plastic lid spacer (seems like mentioning the brand will get my post deleted). I don't think it does anything for cooling. I do think it allows more room for the air to exit the rotors and redirect itself into the brick. As is stock the space between the rotor exit and brick is pretty tiny and you can see from the oil and dirt on the brick that you aren't using a large portion of the brick as efficiently.

I also have some things done to my lid and blower to take more advantage of the spacer, see my build thread for ideas.

 

[Rubber Duck]

I have a 5/8 lid spacer, no numbers, but it does give you more volume and better flow to the rear cylinders, just from the looks if it, lol.
I'm sure @Rubber Duck can explain this much better.
Outside of larger HX + supporting mods and/or meth nothing else will provide drastic iat reduction, in my opinion.

I agree with Mike. . . There is no credibility to enlarging the volume of the plenum regarding cooling effects with these engines. However, there can be with 'Wet Manifolds', as the volume of fuel that is trapped, does help cool.

This was one of the largest power making issues that drag cars had to overcome,
when forced by NHRA to run the Holley EFI, rather than carburetors.

The volume of the Plenum, is directly related to the 'Internal Volume'
of the Engine, and is given in the units of CID.

Also, the volume of the Plenum is also directly related to VE%. So one then begins by multiplying the applicable CID, by VE%. This then means that the larger the cylinder volume, and the higher the value of the VE%, the larger the volume of the Plenum must be. Also, the higher the VE%, the larger the Plenum must be.

Also, the radius' within the manifold runner, must also be broader / wider as VE% increases.

This is because VE% is directly linked to engine rpm.
As engine rpm increases, so does the velocity of the air.

This is analogous to a car attempting to make a turn at 100 MPH, versus 50 MPH. . .

Below I have cut and pasted info regarding this.
This info is for a 500 CID engine, producing about 1430 fwHP.

----------------------------------------------

Plenum Runner Minimum Recommended Entry Area = 5.763 to 6.484 Sq.Inch
Plenum Runner Average Recommended Entry Area = 6.626 Sq.Inch
Plenum Runner Maximum Recommended Entry Area = 6.769 to 8.010 Sq.Inch

Minimum Plenum Volume CC = 1815.1 ( typically for Single-Plane Intakes )
Minimum Plenum Volume CID= 110.8 ( typically for Single-Plane Intakes )
Maximum Plenum Volume CC = 8188.0 ( typically for Tunnel Ram Intakes )
Maximum Plenum Volume CID= 499.7 ( typically for Tunnel Ram Intakes )
***Please notice here, that the volume of the Plenum, is the same as the internal volume of the engine. However, there is also more area held within the manifold runner. So then; it is anticipated that this engine will far exceed 100% VE.

 

[kittyboy]

Anyone have personal experience with lid spacer and/or blower spacer plates in regards to cooling? Currently running an LSX iron bock and was curious as to what kind of iat temps drops (thermal reduction) were gained from either a lid spacer, blower spacer plates, or a combination of both.

Let me know what you have experienced.
Thanks in advance

How are things running lately with your LSX?