Rx7 ??
 

What percentage water to fuel are people using for a twin turbo application twin rotary. atm im using 5.9gph with 36gph of fuel. I am gonna be increasing my fueling to 44gph. What do you think my water percentage should be.

Scott

We normally go for between 10-15% of water/fuel by mass, minmise any blow-by to the sump.

Fuel has a density of 80% of water, but it is OK to go by volume, it is useful to compensate the pressure offset in the manifold.

Richard

Could we have more details of the set uip - pictures will be useful.

Cool thanks. What details would you need.

Scott

I think the Rx7 have primary and secondary injectors, what are their sizes?

Im am going to have 2 x 850cc primary injectors and 2 x secondary injectors

Scott

YOu are capable of deliverying 3400cc of fiel per min. a 1mm just will about giving to 10% of w/f ratio. If you add a priming pump - you can stretch the ratio to 15%+.

How stressful is your tune (engine wise)?

Cool. That was what i was thinking.

My engine is not mapped yet. still waiting for bits to turn up at the mo. Gonna tune for the water and try and gain a few ponies tho the timing.

How does the ratio alter when adding alch if at all.

Scott