MS users - Accel enrichment...?
#46
PassionFord Post Whore!!
iTrader: (4)
More fuel does mean a cooler combustion chamber. On larger powered cars with very high exhaust temps people deliberate don't cut fuel on the over run... You will be fine though.
To make something hotter you need to add more energy to the system, injecting no fuel means no combustion so no more energy is added, so no more heat is generated sweeeet.
Combine this with the fact that your engine isn't under load when on the over run, and is in fact just an air pump and things begin to look massively safe
Racelogic make traction control units, these limit power by cutting a full injector pulse from alternate injectors every cycle, people use these with 800 bhp supras and live to tell the tail.
The mega manual warns against using deacel fuel enrichment (different to fuel cut) on a turbo charged car, as you can still be making boost after slightly closing the throttle which could trip deacel fuel briefly... and force a lean spike at high boost... I have never had this happen and usually inject 90% of fuel on the over run before fuel cut.
The worst thing about fuel cut on the over run I found was a slight stumble when applying throttle in this state. But I think my new setup will cope with this better.
Rob,
To make something hotter you need to add more energy to the system, injecting no fuel means no combustion so no more energy is added, so no more heat is generated sweeeet.
Combine this with the fact that your engine isn't under load when on the over run, and is in fact just an air pump and things begin to look massively safe
Racelogic make traction control units, these limit power by cutting a full injector pulse from alternate injectors every cycle, people use these with 800 bhp supras and live to tell the tail.
The mega manual warns against using deacel fuel enrichment (different to fuel cut) on a turbo charged car, as you can still be making boost after slightly closing the throttle which could trip deacel fuel briefly... and force a lean spike at high boost... I have never had this happen and usually inject 90% of fuel on the over run before fuel cut.
The worst thing about fuel cut on the over run I found was a slight stumble when applying throttle in this state. But I think my new setup will cope with this better.
Rob,
Last edited by Rob_DOHC; 05-04-2012 at 06:25 PM.
#50
PassionFord Post Whore!!
iTrader: (4)
In an ideal world, your AFR's wouldn't change at all when opening closing the throttle, not even OEM's get this bit totally spot on, in fact my 328 goes pretty rich when the throttle is opened, i suspect to encourage a smooth transition from closed to open.
Rob,
#52
PassionFord Post Whore!!
iTrader: (4)
I need to give you a txt in a min mate! I fitted the one from my escort temporarily because i wanted to see what kind of afr's oem cars run etc. Plus im thinking of making an ecu for the 328 as i fancy a small rotrex supercharger when one comes up at a good price on ebay
Rob,
Rob,
#56
PassionFord Post Whore!!
iTrader: (4)
Haha, good man... compound using the turbo too or with a switch over valve? I generally just prefer the power delivery of an eaton to the the compressor type chargers even if it means running less boost to avoid det at lower rpm high load areas... but the rotrex blowers are so easy to find room for!
Theres a firm that make a new inlet for the bmw 6pot, with an eaton bolted to the side for good measure, its a steal at £4000
Nice castings though! But I can get the mounting brackets laser cut easily for the rotrex type
Think I can do the whole conversion for around £1000.... maybe lol
Sorry for going off topic Roger!
Rob,
Theres a firm that make a new inlet for the bmw 6pot, with an eaton bolted to the side for good measure, its a steal at £4000
Nice castings though! But I can get the mounting brackets laser cut easily for the rotrex type
Think I can do the whole conversion for around £1000.... maybe lol
Sorry for going off topic Roger!
Rob,
#57
*** Sierra RS Custard ***
iTrader: (3)
I'm going to compound charge with it, probably the turbo blowing into the supercharger, although I might go for the charger blowing into the turbo then have a switchover at a particular boost point, not really decided yet as need to get the damn thing mounted first and thats not proving trivial at all!
Might just end up sticking with only the turbo and spool it with nitrous instead!
Might just end up sticking with only the turbo and spool it with nitrous instead!
#59
*** Sierra RS Custard ***
iTrader: (3)
No switch mate, still got the ford, and had vauxhalls before I bought it.
You'll be pleased to here my XE corsa is on MS though although the nova I just mentioned isnt, its on a hacked about (ie free) version of the saab management.
TBH if I have switched to anything recently its more to the clios, we've got 3.5 of them at the moment.
I'm just a petrol head in general, not got any one particular make that I am into, just anything that is a good car irrelevant of the badge.
You'll be pleased to here my XE corsa is on MS though although the nova I just mentioned isnt, its on a hacked about (ie free) version of the saab management.
TBH if I have switched to anything recently its more to the clios, we've got 3.5 of them at the moment.
I'm just a petrol head in general, not got any one particular make that I am into, just anything that is a good car irrelevant of the badge.
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2000rpm, accel, acceleration, acell, amount, decel, enrichment, enrichments, fuel, lean, megasquirt, ms, ms3, ritch, settings, spike, tunerstudio