Dinan vs. Mark D Chip (91 octane)

[Todd Black 88]

Ya. I just thought of something though. Even though I'm currently in California, where the maximum octane is 91, I may be going back home to New York sooner or later, where I can fly free with 93. I think I might wait to see what my fate is before diving into chips.

However, here's one last question:

Would there be any major issues with running a 93 chip with 91 gas?
And vice versa?

Spend some money and get the miller war chip and maf. Then you can swap between 91 and 93 maps whenever you want, even on the fly.;)

[BrooklynMW]

@ brooklynmw, hold it there dude. u got 1 thing wrong. where blefevre said more usable power on the dinan between 2-4.5k that is at FULL throttle only because dinan basically retain bone stock part throttle maps so u get no gains other than at full throttle. for a DD marks, or jim conforti, or active auto, etc. will give more usable power on the daily grind when ur not driving at full throttle. just wanted to clear that up before u go deciding on what to get.

Thanks for the correction. I'm gonna hold off and continue to do research.

[Winning]

I swear i've seen dyno of markd vs dinan or conforti

[DmcL]

of what i have tried/seen mark d's seems to be the best all rounder that has been tried/tested. i made a stronger tune but whether it would work ok on 91 over there + havign the O2 sensor to mess with the mixture i cant say so it would be a gamble unless i were to water it down but then it wouldnt reall be much stronger than marks, catch 22 lol

@ winning, dyno will only show power at full throttle, dinans tune uses basically stock part throttle maps so it loses out in normal driving.

[margas]

I definitely agree with blefevre. I've used both with the 91 tune and would give a slight edge to MarkD but thats probably due to my cam. The difference isn't too noticeable. I did feel that the Dinan had a bit more torque down low and the MarkD more power up top. It's a serious toss up. Personally, I'd stick with the MarkD. His tunes are newer and you know you will get a good product. There are tons of fake Dinan's out there and it's hard to tell if you are getting an original.

[ForcedFirebird]

of what i have tried/seen mark d's seems to be the best all rounder that has been tried/tested. i made a stronger tune but whether it would work ok on 91 over there + havign the O2 sensor to mess with the mixture i cant say so it would be a gamble unless i were to water it down but then it wouldnt reall be much stronger than marks, catch 22 lol

@ winning, dyno will only show power at full throttle, dinans tune uses basically stock part throttle maps so it loses out in normal driving.

The o2 sensor has a major effect on tuning over here. When I tuned my car, I had the stock o2 unplugged and a WB in place of it. When finished, hooked the stocker back up and got a surging idle, disconnected the stock one from the ECU and drove it like that without problems (except CEL).

Advancing the timing in my car will knock like a can full of marbles with 89 octane.

[DmcL]

i need to get a stock O2 then for my E30 so i can see what it does and try to tweak the O2 sensor related maps..