chrislaw1968

hi all

well i have got to the stage where i am starting to tune my car after going single, what is the best a/f ratio to aim for for the best power curve.

thanks in advance

chris

mjw

iTrader: (1)

Check this thread:

https://www.rx7club.com/power-fc-forum-47/afr-tuning-uncommon-355825/

cewrx7r1

iTrader: (2)

For 14PSI, about 11.2AFR
For 16PSI, about 10.8AFR

All depends on your fuel octane level, and how well your IC cools down the air charge. If you were to run a good water/alcohol injection system, then you could lean out the AFRs to about 12.1 for more power since the WI mixture will be used for cooling instead of the gas.

Aquamist is made where you are. http://www.aquamist.co.uk/

chrislaw1968

i am running 98 octane with large fmic but no water injection as yet

Tim Benton

iTrader: (1)

tune for the lowest octane you will possibly run since if you tune for 98 octane (advance ignition a little) but on a road trip you find 92 or 93 is the highest, your screwed or need to have a very light foot and not WOT it.

Tim

chrislaw1968

we only have two choices of fuel in the uk now 95 and 98 octane and 98 is 90pence a litre around $7 a gallon , a bloody rip off.

regards

chris

Tim Benton

iTrader: (1)

holy **** that's high. It about $2.30 for 93 octane here, highest I can get at a pump.

How much is the 95 octane?

Tim

chrislaw1968

95 octane is about 84p a litre at the moment, still a rip off

Fish

This is one of the joys of living in the UK.

Fish

onefastrx7

The octane rating in the US and in Europe is different...