JonnyBravo

After the rolling road day at totd I'm curious what AFR you would would prefer to be seeing from a YB on full chat ?

Compared to the Skylines I went with the 3 door seemed a little lean on boost nothing bad was said about it by the operator though

The other thing worth noting is how crap the ecocomy is closed loop is required ASAP !

Chip

iTrader: (3)

High 11s as a general rule of thumb, but you need to look at EGT too really.

Paulo P

I think mine was mapped for 11.8 I'm not sure whether that's good or bad though

JonnyBravo

The 3 door was touching the 12's on full chat.

My Pectel monitor does egt but I'll need a sensor first

Know of any good cheapish EGT's guages Chip ?

Chip

iTrader: (3)

ForeigneRS had some cheap thermocouples in his saph, drop him a PM

JonnyBravo

Cheers mate

Chip

iTrader: (3)

12s on full chat would have me nervous BTW

JonnyBravo

Well unless its just starting going wrong it has been like for ages, infact its seen more use on track than most peoples cars on here do in 5 years

Would be interesting to see what Karl and Stu etc look for etc. when mapping.

We'll probably get the innovate plugged into it at some point to see what its doing on the road as it does hold more boost on the road thus maybe making it leaner, who knows

Not my car but I still wouldn't want to see it die for something so easy to sort

Chip

iTrader: (3)

Phil2400's Saph goes up into the 12s on full boost and that car gets driven harder than just about any car I know, so its certainly possible to run 12s and keep it in one piece, just obviously means you have that little bit smaller margin for any variation in fuel quality etc than if you were a bit richer, on the other hand, its ideal for power!

tabetha

Mine runs 11.3 at full chat.
tabetha

Dingy

Mine is at 11.6 at full chat with maximum load and boost.

And ecomomy ? buy a diesel LOL

JonnyBravo

One day of driving that 3 door made me realise how great my lpg converted cavalier is

Are you using closed loop Dingy ?

PS cheers for the info on that map sensor connector

lead_foot

iTrader: (1)

I noticed Both APT cars (Christain's Escort and Gary's Evo) ran around mid 11's foot to the boards.

Dingy

I don't use closed loop mate, its not needed as the car off boost is very economical

Chip

iTrader: (3)

Im surprised at that with an EVO, would have expected it to be 12 or so.

boXXer

what about n/a cars? what would be considered lean?

Chip

iTrader: (3)

No point being leaner than 12.5 on ANY car when its power you are after really!

boXXer

ok mate thanks. Gunna stick my wideband on my mk1 and see what its running.

Charlie Chalk

iTrader: (1)

Does this count for any 2ltr turbo?


Or does it vary through tune, standard, stage one, two, three etc?

JonnyBravo

I'll have to check what Steve mapped the Nova too, I remember it being around that if not slightly leaner, he knows what works though so I'll leave it well alone

lead_foot

iTrader: (1)

No, not really.

IIRC Cossies run around mid to high 11's for full power, any higher and they get too hot (Excessive EGT's)

I think it depends on the inlet, head, exhaust mainfold, combusion chamber design. For example I've seen Turbo'd B16 on a GT30 run 12.5 @ full thottle @ 2bar of boost and the EGT's weren't excessive on 99 octane fuel.

I'm sure someone who know more about it, will explain more clearly (and correctly).

boXXer

my engine was dyno'd before i fitted it, but it smells like its running VERY rich.

JonnyBravo

Is it injection or carbs mate ?

boXXer

carbs mate. twin 48's. Might just be the way they are setup. havent actually given it some stick yet.

JonnyBravo

Wants to be a proper pinto if its on 48's IMO

I had 45's on my 183hp pinto and it was shocking on fuel, as it cant really be controlled its why everyone chooses to use throttle bodies and a proper ecu

Carbs for race engines, tb's for road engines

Ridgey

iTrader: (5)

Mine goes upto 13, maybe why i've melted no 3 spark plug

lead_foot

iTrader: (1)

TB's if you can afford them road engine or race engine IMHO.

boXXer

it is a proper pinto mate

195hp

JonnyBravo

Depends what race series your in mate

Not allowed injection in certain classes but yes I agree that if your allowed then throttle bodies are far superior.

Boxxer- Sounds sweet, miss my pinto a lot, but I dont miss the fuel bill

Get it setup properly then you might find its not as bad as you think, mine was great once setup by Pete Baldwin but just too much for a daily driver

pete mcrash

iTrader: (1)

theirs a pic on here of the afr graph/mixture...somewhere

boXXer

this is a daily driver Cant be worse than the cos though, lol. Or can it?

JonnyBravo

Carbs and economy dont really go together in my experience

However after using my mates 3 door for the weekend I can't honestly say that was any good either !

I can't be 100% but closed loop on a Yb must save you a bloody fortune !

Charlie Chalk

iTrader: (1)

Anyone else shed some light?

scoooby slayer

iTrader: (4)

il second that if mapped correctly fuel consumption and driveability off boost is excellent even on toilet flusher injectors

JonnyBravo

Scooby Slayer- How many miles to a tank are you getting then ?

Or should I say how many tanks to a mile are you getting considering the use your car has had in the last few weeks

scoooby slayer

iTrader: (4)

evening mate. if your ragin the arse of it it poors it in literally but theres no getting away from that is there.

when i went to msds in blackpool used a tank and a quarter which worked out 12 to the gallon and thats cruising at 70 to 90 kmh of coarse and the odd fun splurt if you know what i mean.

then on the way back from msd same style driving did 20 to the gallon.

if i proper cruised at a held speed and just tickled the throttle 25 - 30 mpg would be doable i reckon

since last fill up ive done 123 miles and 1/4 tank left although ive been having some fun and still averaged 12 mpg

JonnyBravo

That really is quite impressive

So your not using closed loop lambda then ?

Nick.

Dads old car varied from 12.6 to 12.2 between 3000rpm and 7520rpm

scoooby slayer

iTrader: (4)

no mate no closed loop. just a live map on 865 CC injectors.

dont get me wrong flat out cant be much more than 6 mpg it that

but this is the first cossie ive had that doesnt have to be raged to run good. and its the first one ive had that doesnt drip oil from anywhere, hasnt used any oil or water yet done 1000 miles since map and service. and oil doesnt smell of petrol vapour

i can honestly sit in 5th gear at 35 mph and it runs like a sewing machine i kid you not mate

JonnyBravo

Sounds like a superb engine mate

I certainly couldn't put up with how shit on fuel my mates was just cruising on the motorway