blocks & coolings.
Turbo Mini Forums

Im using N/A SPI block in my SPI converted carb mini.

it was fitted with stage 1 kit, Stage 3 head.

I have noticed. the engine run lots cooler. than my previous engine. this is SPI to carb engine. (different piston)

Same engine on my old engine, same stage 3 head. same water pump. (50hp sprite, different piston lower compression)

only difference is i removed water pump that have bypass hole to head, for fitment of stage 3 head.

50hp sprite ran hotter when i changed the water pump and drilled stat.

Why it running hotter than SPI which using same drilled stat despine lower compression piston...


is it do with block cooling passages or something different ?

is it do with block cooling passages or something different ?

you may have it in one!

Edit

It is to do with the way the cooling system is plumbed

The SPi has a constant by pass of coolant through the manifold, that is something like 9/16" bore hose and pipes, totaly by passing the rad. This keeps the flow round the block more even.

Maybe????

The SPi rad is the biggest production side rad fitted to any mini.

Edited by Sprocket on 24th Oct, 2006.

blocs seem to have an inconsistant production quality in castings, some are really good in temp exchanges some others very bad... but this had already been discuted search for turbodave and bloc in the search page..