About this 100 octane. Just wondering. If a chip were to be specifically tuned for 100 octane....

quattronirvana · 11-22-2002, 09:36 AM

does that mean that the car won't run as well with 93 octane? Basically, you'd have to run 100 octane (at $5/gallon) to take full advantage of the programming?
Follow me on this for a second: If most of my driving is going to be using 93 octane wouldn't it make more sense to have the chip programmed for that octane since apparently from the discussion in the previous post below a chip cannot be programmed for a range of octanes. If instead you program it to 100 octane and run 93 you might not perform as well as a car that's programmed for 93 and is running 93 ?

So, if that's the case (and I don't know that it is), it would make sense for MTM to program for 93 seeing that's what most of us (at least in the east) will be using. Right?

Note: If I'm way off please don't be too harsh.

YosemyTT · 11-22-2002, 09:42 AM

you will do serious damage very quickly. Your point is valid and makes sense but IMHO the best of all worlds is to be able to switch between programs. AFAIK APR is the only tuner to offer such an option.

hoTTub · 11-22-2002, 09:43 AM

APR for example (and any other tuner) would tell you that you should not run a lower octane than the chip is tuned for, if you are running a 100 octane program and only put 93 in the tank, your car will not run well, it will pull timing.

gesTTalt · 11-22-2002, 09:48 AM

due to the gas variances in the US. If you programmed the chip for 100 oct, and you put 93 in it, the ECU would pull back timing, you'll hear pinging and detonation and damage your engine.

93 would be ideal, especially for the east coasters, where we have good gas.

gesTTalt · 11-22-2002, 09:51 AM

quattronirvana · 11-22-2002, 09:52 AM

If you kept switching back and forth from say 93 to 100 and back. And you did this often. Could it potentially have an ill affect on your engine?

quattronirvana · 11-22-2002, 09:54 AM

gesTTalt · 11-22-2002, 09:57 AM

YosemyTT · 11-22-2002, 10:00 AM

you could run the 93 program with 100 in the tank just fine but not the other way round...

quattronirvana · 11-22-2002, 10:03 AM

11-22-2002, 09:36 AM	#1
quattronirvana New Member Account #: 43522 Join Date: Sep 2002 Posts: 205	About this 100 octane. Just wondering. If a chip were to be specifically tuned for 100 octane.... does that mean that the car won't run as well with 93 octane? Basically, you'd have to run 100 octane (at $5/gallon) to take full advantage of the programming? Follow me on this for a second: If most of my driving is going to be using 93 octane wouldn't it make more sense to have the chip programmed for that octane since apparently from the discussion in the previous post below a chip cannot be programmed for a range of octanes. If instead you program it to 100 octane and run 93 you might not perform as well as a car that's programmed for 93 and is running 93 ? So, if that's the case (and I don't know that it is), it would make sense for MTM to program for 93 seeing that's what most of us (at least in the east) will be using. Right? Note: If I'm way off please don't be too harsh.

11-22-2002, 09:42 AM	#2
YosemyTT Senior Member Account #: 3125 Join Date: Mar 2000 Posts: 9,595	if your chip is running a 100 octane program and you put 93 in the tank you will do serious damage very quickly. Your point is valid and makes sense but IMHO the best of all worlds is to be able to switch between programs. AFAIK APR is the only tuner to offer such an option. __________________ Mark B. Click for my radio show and blog ->

11-22-2002, 09:43 AM	#3
hoTTub Member Account #: 11019 Join Date: Oct 2000 Posts: 17,304	You are 100 percent right........ APR for example (and any other tuner) would tell you that you should not run a lower octane than the chip is tuned for, if you are running a 100 octane program and only put 93 in the tank, your car will not run well, it will pull timing. __________________

11-22-2002, 09:48 AM	#4
gesTTalt Senior Member Account #: 24538 Join Date: Aug 2001 Posts: 5,284	You right on. You can have a bit of range in your programming, maybe 91/92 or 93/94 due to the gas variances in the US. If you programmed the chip for 100 oct, and you put 93 in it, the ECU would pull back timing, you'll hear pinging and detonation and damage your engine. 93 would be ideal, especially for the east coasters, where we have good gas. __________________ Current: 2007 Daytona Gray RS4 Past cars: 2001 DB 225 TTC 2005 SC'd Honda S2000 2007 BMW 328i 2004 Nissan Frontier 2001 Lexus IS300 1993 Honda Prelude 1989 Isuzu Amigo

11-22-2002, 09:51 AM	#5
gesTTalt Senior Member Account #: 24538 Join Date: Aug 2001 Posts: 5,284	GIAC also offers race programs...but, you need to sign a waiver __________________ Current: 2007 Daytona Gray RS4 Past cars: 2001 DB 225 TTC 2005 SC'd Honda S2000 2007 BMW 328i 2004 Nissan Frontier 2001 Lexus IS300 1993 Honda Prelude 1989 Isuzu Amigo

11-22-2002, 09:52 AM	#6
quattronirvana New Member Account #: 43522 Join Date: Sep 2002 Posts: 205	Wow! Didn't know you could do that with APR. Programable chip, nice. One thing though.. If you kept switching back and forth from say 93 to 100 and back. And you did this often. Could it potentially have an ill affect on your engine?

11-22-2002, 09:54 AM	#7
quattronirvana New Member Account #: 43522 Join Date: Sep 2002 Posts: 205	So going higher on the octane than what the chip is programed for is ok. Just not lower. Right?

11-22-2002, 09:57 AM	#8
gesTTalt Senior Member Account #: 24538 Join Date: Aug 2001 Posts: 5,284	*yep, put 89 oct in the stock is ok, BUT, the car runs like sht. __________________ Current: 2007 Daytona Gray RS4 Past cars: 2001 DB 225 TTC 2005 SC'd Honda S2000 2007 BMW 328i 2004 Nissan Frontier 2001 Lexus IS300 1993 Honda Prelude 1989 Isuzu Amigo**

11-22-2002, 10:00 AM	#9
YosemyTT Senior Member Account #: 3125 Join Date: Mar 2000 Posts: 9,595	only if you had the wrong octane in the tank when you switched programs you could run the 93 program with 100 in the tank just fine but not the other way round... __________________ Mark B. Click for my radio show and blog ->

11-22-2002, 10:03 AM	#10
quattronirvana New Member Account #: 43522 Join Date: Sep 2002 Posts: 205	cool

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