2.8L 12v ECU Remap ???
01-14-2003, 07:38 PM
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2.8L 12v ECU Remap ???
So I am looking for a few more HP and during one of my data digs I came across jetchip.com. They seem to have an upgrade for the 2.8L engine, their site has it listed as the 80 2.8L. But the 80 never had a 2.8L engine but the 1993 90 did and that same engine carried over to the A4 through 1998 when it got the 30 valve head.
I emailed them tonight and I hope to get an answer on what they can do for the 12v engine. The upgrade is $300, and thats not bad for chipping. I dont understand why nobody does a chip for the 12v engine, surely there are at least 8-10hp to be liberated by changing the timing and letting the engine know it will be running 93 octane fuel or better. If it can be done that would put Frog in my guestimation over 200hp.
I am going to experiement with the Toluene at some point too. I made a calculator in excel to determine the octane of a toluene/gasoline mixture. I just enter the volumes and the octanes and it does the rest. I bet if the ECU can be remapped and I run 95 or 96 octane I can probably churn 210hp with the 12v.
-Phil
I emailed them tonight and I hope to get an answer on what they can do for the 12v engine. The upgrade is $300, and thats not bad for chipping. I dont understand why nobody does a chip for the 12v engine, surely there are at least 8-10hp to be liberated by changing the timing and letting the engine know it will be running 93 octane fuel or better. If it can be done that would put Frog in my guestimation over 200hp.
I am going to experiement with the Toluene at some point too. I made a calculator in excel to determine the octane of a toluene/gasoline mixture. I just enter the volumes and the octanes and it does the rest. I bet if the ECU can be remapped and I run 95 or 96 octane I can probably churn 210hp with the 12v.
-Phil
01-15-2003, 06:40 AM
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The 90/100 12v's have a different engine AAH and different ECU harness . . .
The AAH engine used a Bosch 64-pin, one connector harness ECU with OBD-I smog control.
Our A4 12v's have the AFC engine which uses a 96 terminal harness with 5 connectors and OBD-II smog control.
If you go to the 12v development forum on Yahoo and read through a year's worth of ECU research, you will see that we currently are looking at either the very expensive proposition of having a custom Hitachi compatible CPU/memory chip programmed or the (hopefully) less expensive proposition of fitting a tuned european MMS 300-series ECU (used on the European A4 12v), if it has the same or a substantially similar harness.
Regarding Toluene: The original 12v's were designed to run on 95 octane fuel. Audi actually slightly de-tuned the AFC 12v to allow it to run better on lower octane fuel. You will see that the AAH 12v has a 10.3:1 compression ratio while the AFC 12v has a 10:1 compression ratio. This resulted in the same top-end hp, but torque dropped a few lb.ft.
When I run my A4 12v on higher octane fuel, it comes alive. I feel that our 12v's generally run octane-starved due to the federal and state regulations in states like California where the law forces the gasoline manufacturers to go no higher than 91 octane. Union 76 had 92 octane fuel for a long time, and, about a year ago, they put up a big notice on their website stating that the California Fuel "****'s" forced them to lower the octane rating on the fuel.
Our A4 12v's have the AFC engine which uses a 96 terminal harness with 5 connectors and OBD-II smog control.
If you go to the 12v development forum on Yahoo and read through a year's worth of ECU research, you will see that we currently are looking at either the very expensive proposition of having a custom Hitachi compatible CPU/memory chip programmed or the (hopefully) less expensive proposition of fitting a tuned european MMS 300-series ECU (used on the European A4 12v), if it has the same or a substantially similar harness.
Regarding Toluene: The original 12v's were designed to run on 95 octane fuel. Audi actually slightly de-tuned the AFC 12v to allow it to run better on lower octane fuel. You will see that the AAH 12v has a 10.3:1 compression ratio while the AFC 12v has a 10:1 compression ratio. This resulted in the same top-end hp, but torque dropped a few lb.ft.
When I run my A4 12v on higher octane fuel, it comes alive. I feel that our 12v's generally run octane-starved due to the federal and state regulations in states like California where the law forces the gasoline manufacturers to go no higher than 91 octane. Union 76 had 92 octane fuel for a long time, and, about a year ago, they put up a big notice on their website stating that the California Fuel "****'s" forced them to lower the octane rating on the fuel.
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