Chipping a diesel inboard

[jwalker]

Originally Posted by Colin F

yes we did get some results......

top speed was increased by 2 knots on the middle jumper setting. Acceleration was noticeabley improved but no figures to prove it. As a guideline, acceleration was the same as torbay harbour patrol boat (same rib, heavier kit on board though)which has a 225 honda and a S/S prop, up to 20 knots, then they pulled away. Mine still on ali prop and still under revving by 300 - 400 rpm.

Ps thanks to 'Bluestreak' for fitting it for me

Colin, am I sensing a bit of disappointment?

[Colin F]

Originally Posted by jwalker

Colin, am I sensing a bit of disappointment?

I'm not sure what i expected really. I did have look for some old data I remember seeing that fletcher used to publish showing top speed with different outboards. I seem not remember not much top end improvement for a fair amount of hp, but I'm not sure if I remember it correctly. The acceleration improvement is good, the top end a little disappointing I suppose. Do you think the ally prop may be a limiting factor?

I will be happier with a S/S prop and a clean hull, to then see what it does in comparrison with the other 6.5's round here that have 175 & 225 honda's on.

[searafting.no]

Try www.kcr.se they have chip for both mercruiser and the volvo d engines.