Best stage III chip right now?
27-11-2009, 06:56 PM
#1
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Best stage III chip right now?
Sure, a common question. However I'm 12,000kms from the nearest rolling road where anyone would know wth to do. Live mapping is not an option.
I have a fresh 2wd motor, T34 .48, -31, RS500 style cooler, good head gasket, 3 inch exhaust, 803s, uprated clutch, silicone hoses. Standard radiator but in good nick.
I plan on a group a coil as well. Air filter will be either cone or standard panel - not sure yet.
I have a Stage III chip that came with my L6 but it's an unknown. From what I read here it's either MSD or NMS (gunship). Power generation is great but honestly I want more reliability than outright savagery. The Gunship 3+ looks pretty good to me right now...but I've not wire ringed as they suggest.
What would you do if you ran a Stage III Cosworth on Mars?
I have a fresh 2wd motor, T34 .48, -31, RS500 style cooler, good head gasket, 3 inch exhaust, 803s, uprated clutch, silicone hoses. Standard radiator but in good nick.
I plan on a group a coil as well. Air filter will be either cone or standard panel - not sure yet.
I have a Stage III chip that came with my L6 but it's an unknown. From what I read here it's either MSD or NMS (gunship). Power generation is great but honestly I want more reliability than outright savagery. The Gunship 3+ looks pretty good to me right now...but I've not wire ringed as they suggest.
What would you do if you ran a Stage III Cosworth on Mars?
27-11-2009, 08:29 PM
#3
if you think the chip is MSD or NMS then a little phone call to them will confirm it - or if you post up a pic then i'm sure we'd be able to identify it
i'd go for MSD chip, as long as you get the chip for your spec spot on, its only a matter of setting the CO% at idle and it should be veirtually bang on.
i guess there is someone in or around your way who can just check the fueling with wideband to be sure?
i'd go for MSD chip, as long as you get the chip for your spec spot on, its only a matter of setting the CO% at idle and it should be veirtually bang on.
i guess there is someone in or around your way who can just check the fueling with wideband to be sure?
27-11-2009, 09:27 PM
#5
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if you think the chip is MSD or NMS then a little phone call to them will confirm it - or if you post up a pic then i'm sure we'd be able to identify it
i'd go for MSD chip, as long as you get the chip for your spec spot on, its only a matter of setting the CO% at idle and it should be veirtually bang on.
i guess there is someone in or around your way who can just check the fueling with wideband to be sure?
i'd go for MSD chip, as long as you get the chip for your spec spot on, its only a matter of setting the CO% at idle and it should be veirtually bang on.
i guess there is someone in or around your way who can just check the fueling with wideband to be sure?
Setting the fuel should be easy, I have a wideband that I use for my Merkur - but it only measures air fuel ratio, not CO2. I'd need a sniffer for that.
I assume that if you set the CO2 at idle that it should continue the same under load? Rolling roads are just now starting to pop up around here thanks to the hardcore JDM guys. Should have a run on the dyno to set boost/fuel/CO2 anyway right?
27-11-2009, 09:33 PM
#7
when you set the co2 on idle via the screw on the ecu you are adjusting the global co2 so you are making it richer or leaning it across the whole rev range,you can do a set up on the road/setting boost etc if you can not get to a rolling road/specialist !
Dont sound like a genuine stu/karl one as they put a serial number for there reference!
Dont sound like a genuine stu/karl one as they put a serial number for there reference!
Last edited by mechanic28; 27-11-2009 at 09:41 PM.
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27-11-2009, 09:39 PM
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The chip just has some handwriting on it. Says Stage III, 803, greens. No logo, nothin'. I'll post a pic of it this evening (morning for you guys). Hence why I thought I should just go new.
Setting the fuel should be easy, I have a wideband that I use for my Merkur - but it only measures air fuel ratio, not CO2. I'd need a sniffer for that.
I assume that if you set the CO2 at idle that it should continue the same under load? Rolling roads are just now starting to pop up around here thanks to the hardcore JDM guys. Should have a run on the dyno to set boost/fuel/CO2 anyway right?
Setting the fuel should be easy, I have a wideband that I use for my Merkur - but it only measures air fuel ratio, not CO2. I'd need a sniffer for that.
I assume that if you set the CO2 at idle that it should continue the same under load? Rolling roads are just now starting to pop up around here thanks to the hardcore JDM guys. Should have a run on the dyno to set boost/fuel/CO2 anyway right?
CO adjustment is a global multiplier so it would benefit from being set accurately
27-11-2009, 09:51 PM
#11
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What lambda corresponds to an optimum CO2? Does it? If so I could set it at home.
27-11-2009, 09:56 PM
#13
most are set between 2.5% and 3.5% co2 on idle depending on what the writer of the chip has set it,with regards to what lamba would be reading sorry i ait got a clue chap!would think it would be around 1.130 area!
Last edited by mechanic28; 27-11-2009 at 09:57 PM.
27-11-2009, 09:59 PM
#14
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An MSD chip will normally run with 2.5% base CO. On a healthy engine this is normally achieved at around lambda 0.98 - 1.00 (14.4 - 14.7 AFR).
27-11-2009, 10:06 PM
#15
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was trying to remember what the cars run when i do a emission just and they fail due to high co2 etc it would seem my educated guess is well......piss poor
27-11-2009, 10:08 PM
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27-11-2009, 10:11 PM
#20
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As an aside, my Merkur's 2.3 Lima likes to run at WOT around 12.9 lambda. I assume the mapping of a Cossie goes rich on the high end. Where is the lambda sweet spot for an internally unmodified YBB?
27-11-2009, 10:17 PM
#23
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11s. Wow I knew it would go rich but not that much. I would guess a quarter of the fuel at that point isn't even burnt, it's just used to cool the cylinders/pistons.
28-11-2009, 06:11 AM
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