Dyno testing 'performance mods'

WillitBoost

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Thanks! I think I used too much binder for the core. Took a good 20min to chisel it all out and remove the last of the loose sand from the inside of the manifold. I've read I should add molasses / sugar to the mix so it dissolves in hot water.

I'll try the Petrobond for the core this time round
 

WillitBoost

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Cast a new manifold this morning with an extra 8mm of material to drill and tap. Drilled and tapped the transfer too.

Can handle sustained WOT without leaning out and doesn't fall down to a 3000rpm idle like it did on the manifold sourced pulse.

The new pistons haven't arrived so this is the trashed piston and cylinder.

I'll go fetch the laptop and see what it's making.

I'll fit my homemade pipe after
 

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Al Regresar

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Cast a new manifold this morning with an extra 8mm of material to drill and tap. Drilled and tapped the transfer too.

Can handle sustained WOT without leaning out and doesn't fall down to a 3000rpm idle like it did on the manifold sourced pulse.

The new pistons haven't arrived so this is the trashed piston and cylinder.

I'll go fetch the laptop and see what it's making.

I'll fit my homemade pipe after
Nice work!
 

WillitBoost

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It almost looks like it's made for it!

This piston/cylinder is getting worse, I'll grab today's baseline dyno and the custom pipe graph.

If I had to pick one word for this pipe... violent haha
 

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DieselTech

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It almost looks like it's made for it!

This piston/cylinder is getting worse, I'll grab today's baseline dyno and the custom pipe graph.

If I had to pick one word for this pipe... violent haha
WillitBoost when you hydra-formed your expansion chamber. How did you release the high pressure water from the chamber after forming it? Thanks.
 
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