New dyno numbers 309whp 361ftlbs.!!!!!!

[LENNY127]

all I can say is run er hard and let us know what breaks first. you guys are more adventurous than I am , I want to make it faster but not at the cost of reliability....only time will tell I guess....good job though keep knocking off those tenths.

 

[Captain KRM P5]

direct injected motors are designed to run safely with extremely lean AFR's. just a BTW, i'm not saying its good to (hah)

not THIS lean they're not. he doesn't even hit 12:1 air fuel ratios until just shy of 6000rpms it looks like. there are people with built engines that won't run them that lean.

good numbers, but be careful. i'd say that AFR is way too lean to be safe in the long run.

 

[driver311]

other graph is up.

 

[driver311]

not THIS lean they're not. he doesn't even hit 12:1 air fuel ratios until just shy of 6000rpms it looks like. there are people with built engines that won't run them that lean.

good numbers, but be careful. i'd say that AFR is way too lean to be safe in the long run.

Car is in the low 11s for afr. This sniffer is just way off especially with a cat in the mix. I already stated that.

 

[Captain KRM P5]

you have a wideband after the turbo to tell you its at 11:1? or how are you reading that exactly? sorry if i missed it. in my experience cats do not throw the AFRs off to that extreme, a half a point at the most.

 

[driver311]

lm1 closer to the cat. reads in the high 11s with the spectra intake, and high 10s with stock box.

so i figure low 11s with intake and way to rich still with stock box. lol

 

[Captain KRM P5]

before or after the cat? if thats before the cat those are pretty damn good AFRs.

 

[driver311]

no its just after the first cat. second cat is gone, test pipe and o2 bung replaced that

 

[driver311]

once I get some kind of engine management and a downpipe I will tune it to 11.8ish on pump and 12.5ish on race gas. Very soon. Also plan on a upgraded tmic. I think I like the extra spool time that the tmic offers over he fmic.

 

[dcomiskey]

No the cats burn off unburnt gas. So is actually in the high 11s. Besides I put the modded stock box back on and the car dynoed 311whp and was back in the low 11s for afr. So I left it. I just havent posted that graph yet.

Cats don't burn off unburnt gas. They provide an environment for a chemical reaction wherein toxic combustion by-products are converted to less-toxic substances. (Thank you Wikipedia! )

 

[fourthmeal]

FYI it is found that a cat, due to the heat retained within, can burn off unburnt hydrocarbons, which would change the AFR measured by a wideband.

 

[pHeeL tHiZ ViBe]

not THIS lean they're not. he doesn't even hit 12:1 air fuel ratios until just shy of 6000rpms it looks like. there are people with built engines that won't run them that lean.

good numbers, but be careful. i'd say that AFR is way too lean to be safe in the long run.

well i think being direct injected gives us a little extra safety
Wiki Gasoline Direct Injection (includes Mazda DISI) i really don't know much about it though, has anyone actually blown a mazdaspeed6 or 3 motor from running to lean yet? i think there have only been overboost issues ?

 

[Captain KRM P5]

well i think being direct injected gives us a little extra safety
Wiki Gasoline Direct Injection (includes Mazda DISI) i really don't know much about it though, has anyone actually blown a mazdaspeed6 or 3 motor from running to lean yet? i think there have only been overboost issues ?

yes and no. being direct injected isn't a get out of jail free card to run a great deal leaner. overboost is simply one condition out of many that can lead to a leaner air fuel ratio. too much air + not enough fuel.

keep in mind there is more to being safe than a good air/fuel ratio. EGTs have a lot to do with it to. the higher the exhaust gas temps, the higher your combustion temps are. the higher the combustion temps are, the closer you get to things like detonation, ring gap clearance issues, melting pistons, etc etc.

if it were only a matter of having good AFRs, it would be easy as pie to get alot of power out of alot of different vehicles.

 

[pHeeL tHiZ ViBe]

true, true..

hey everyone thats ken ^ he knows the s*** lol

 

[Haltech]

If i was you, i would get a meth injection kit. You will bring those AFRs numbers down and cool the motor at the same time. Not to mention, put down more power.

 

[driver311]

thats some good advice and thats exactly what i have planned. More to definately come. LOl

 

[chriscecc914]

well i think being direct injected gives us a little extra safety
Wiki Gasoline Direct Injection (includes Mazda DISI) i really don't know much about it though, has anyone actually blown a mazdaspeed6 or 3 motor from running to lean yet? i think there have only been overboost issues ?

me...and it happened on the 2nd WOT run

 

[pHeeL tHiZ ViBe]

lean from overboost though right?

 

[controlo]

lean from overboost though right?

yeah, what exactly would cause his car to run lean? boosting 18psi? i have an injen cai and a PG test pipe, i wonder if my A/F's are safe...

MBC sounds like fun.

haha.

 

[Focused]

me...and it happened on the 2nd WOT run

Maybe I'm thinking of somebody else, but wasn't the bigger turbo bolted on when the motor blew?