[hammdo]

Well, today I installed the 'second' Varimax pump in Series. I placed the second one just above the right splash shield and added the circuit with the Bosch p-n-p wire harness.

Nice location (there is a cavity just under the fuse box and it fits in there nicely. Held in there with the rubber/metal clamp and 2 super strong ti-wraps) , easy to update the hoses, and, purged air very fast:

Location of the pump with the Bosch upgrade p-n-p:





Hose routing (this shot was from the first 10amp fuse. I later moved it to the 'second' one -- you see it exposed) as it was an 'ignition' source):



Add-A-Circuit:



Here they are running:



Now, the results:

Recovery was SUPER FAST after doing a 10 second WOT -- very fast.

Temps however did not LOWER, they stayed steady (Max of 15 Degrees above ambient while cruising).

While idle @ stoplight, temps rose very slowly so that is a plus. Duals is a plus also.

As far as lower temps?

IAT temps are the key -- need to lower those. The intercooler brick is the other obstacle -- too small so that is the limiting factor.

This experiment was for a 'track' focus -- sure drag can use the chiller or an ice box, but not for tracking.

So, to make this effective, more capacity (e.g., more fluid) would probably slow the temp rise since there would be more coolant to flow, another series of HXs, but on the whole, this does control the rise and is very effective in recovering to a steady temp while moving.

So, there you have it, helps slow temp rise, speeds temp recovery.

As far as lowering temps, no real difference between the single and dual pumps -- just efficiency and recovery.

Pretty neat though -- backup works (I tried disconnecting each one at a time -- both did just fine!).

NOTE: recovery is also impacted by the bypass valve opening allowing cooler intake air so that helps a ton.

So I do have the original ZL1 HX, I wonder if dualing HX's will help....Hummmmmmmmmmm....

Thanks!

-Don