AFR graphs

[Chilliman]

Anyone got an AFR graph from a RR sesh demonstrating 'optimum' or ideal AFR curve?

Cheers fellas,

Chilli

ETA: here's one I made earlier

Edited by Chilliman on Tuesday 17th April 11:42

[Alexdaredevilz]

I would of thought it would vary from engine to engine, not a lot of point copying

[Chilliman]

Alexdaredevilz said:

I would of thought it would vary from engine to engine, not a lot of point copying

Not copying Alex, curious mate

[TV8]

When I put mine on the rollers, they thought the fuelling was pretty good.

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[Alexdaredevilz]

I got a old one lying about

[Chilliman]

TV8 said:

When I put mine on the rollers, they thought the fuelling was pretty good.

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Spot on! Exactly what I was hoping to see, somewhere between 12.5-12.8, and fairly consistent from around 4000rpm upwards.... From what I've read that's around optimum for maximum power... I do believe I've got a few more horses waiting to be released

Thanks for posting TV8

[Chilliman]

Alexdaredevilz said:

I got a old one lying about

Thats interesting Alex, your's appears to start going richer around 4500 same as mine MS2?

[TV8]

A pleasure. Reading my comment about noise, I must find out how loud it sounds outside the car with the full ACT system.

[dbv8]

Alexdaredevilz said:

I got a old one lying about

Thats interesting Alex

[Chilliman]

dbv8 said:

Alexdaredevilz said:

I got a old one lying about

Thats interesting Alex

Now deleted the two that were surplus to requirements

[dbv8]

Chilliman said:

Now deleted the two that were surplus to requirements

It looks like he has and AFR @ wheels on that graph

[Alexdaredevilz]

The fuelling was a Mark Adams best guess chip

Cant complain but I wish it was nearer 13:1

[dbv8]

Alexdaredevilz said:

The fuelling was a Mark Adams best guess chip

Cant complain but I wish it was nearer 13:1

Whats the very rich red AFR then?

[Alexdaredevilz]

My 'before' dyno

on that dyno the difference was MA chip reguessed, complete decat,act induction, 45mm inlet and trumpets

With stock RR camsahft


Since that dyno,I found it had 12/16 valves leaking

So now its fitted with a 300 Dur mech cam, 16 new valves with double springs

Im looking for a 50hp increase 'ish'

[ChimpanLucky]

Chilliman said:

Spot on! Exactly what I was hoping to see, somewhere between 12.5-12.8, and fairly consistent from around 4000rpm upwards.... From what I've read that's around optimum for maximum power... I do believe I've got a few more horses waiting to be released

My old Lucas system and it's MA Tornado chip seems to give a nice consistent 12.5 - 12.8:1

[dbv8]

Alexdaredevilz said:

Im looking for a 50hp increase 'ish'

Good luck with that.
Barrie got + 70bhp and 90lb/ft from 3000 to the redline with his latest little mod.

[Alexdaredevilz]

dbv8 said:

Good luck with that.
Barrie got + 70bhp and 90lb/ft from 3000 to the redline with his latest little mod.

Depends to who installs it

[Chilliman]

ChimpanLucky said:

Chilliman said:

Spot on! Exactly what I was hoping to see, somewhere between 12.5-12.8, and fairly consistent from around 4000rpm upwards.... From what I've read that's around optimum for maximum power... I do believe I've got a few more horses waiting to be released

My old Lucas system and it's MA Tornado chip seems to give a nice consistent 12.5 - 12.8:1

Nice one! Interesting that that's two Lucas systems running really good AFR's and two after market ECU's both running rather rich

[dbv8]

Chilliman said:

Nice one! Interesting that that's two Lucas systems running really good AFR's and two after market ECU's both running rather rich

I suspect MS tuners side on caution

I am very happy the way mine runs and performs and mpg is very good for my driving habits.
I see about 14 on the wideband cruising at 80-90, mid 12's on acceleration, low 13's at idle IIRC

I have complete faith in Dale (Bailey performance).... top bloke.

Edited by dbv8 on Tuesday 17th April 17:10

[Alexdaredevilz]

Chilliman said:

Nice one! Interesting that that's two Lucas systems running really good AFR's and two after market ECU's both running rather rich

There both Mark Adams chips

He does a very good job IMO

But he's just hard work