P28 on a B18C1
07-29-2010, 07:08 PM
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Re: P28 on a B18C1
If you use a P72, you don't have to have it chipped/tuned unless you want to. The stock P72 maps are obviously the right maps for that engine, so that's perfectly fine for that engine.
07-30-2010, 03:31 AM
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07-30-2010, 03:33 AM
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Re: P28 on a B18C1
For the time-being I plan on keeping the engine stock, I may get a new intake manifold and some cams. The real modifying won't come till after I'm out of school. (I'd hate to drop a ton of money into it, and then it's gets stolen.)
07-30-2010, 03:55 AM
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Re: P28 on a B18C1
Fabrik8, you've been great help. Thanks!!
I'll be giving the parts house a call today and see if they still have the ECU and hopefully they won't make me pay for it. For the secondary butterflies, I've read that they open around 6000rpm correct and I assume that I would hear them open or feel a boost in power once they open? I'm hoping I can just get a p72 cause personally I think it'll be a waste to get my ecu chipped for something as basic as that, especially since I plan on keeping it a stock engine for a while.
I'll be giving the parts house a call today and see if they still have the ECU and hopefully they won't make me pay for it. For the secondary butterflies, I've read that they open around 6000rpm correct and I assume that I would hear them open or feel a boost in power once they open? I'm hoping I can just get a p72 cause personally I think it'll be a waste to get my ecu chipped for something as basic as that, especially since I plan on keeping it a stock engine for a while.
Yeah, it's a direct replacement, wiring is the same. A P72 has a knock sensor wire (just like a P30) and it also has an extra wire for the secondary butterfly control (that the stock GSR manifold has). So if you still have the stock dual runner GSR intake manifold, you want to use a P72. All you would need to do is check that those two wires are run from the ECU to the engine, because they may or may not be depending on which type of harness was used for the engine swap. Your engine already has a knock sensor on it, but the P28 isn't using it (it doesn't have a knock sensor board).
If you use a P72, you don't have to have it chipped/tuned unless you want to. The stock P72 maps are obviously the right maps for that engine, so that's perfectly fine for that engine.
If you use a P72, you don't have to have it chipped/tuned unless you want to. The stock P72 maps are obviously the right maps for that engine, so that's perfectly fine for that engine.
07-30-2010, 08:02 AM
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Re: P28 on a B18C1
A base map is just the best-case starting point using a stock ECU program. I have no clue what you're talking about when you're saying a base map is "1 dimensional". The ECU program code is the same... If you made a naturally aspirated B16, you'd use a P30 program as a base map and then tweak those maps from there.
By the way, a 1 dimensional map isn't a map at all. Maps are at least two dimensional, because they're a table/matrix. If it's one dimensional, it's a vector.
By the way, a 1 dimensional map isn't a map at all. Maps are at least two dimensional, because they're a table/matrix. If it's one dimensional, it's a vector.
Obviously the tune itself is not 1 dimensional, you read too much into that statement. I was using that as an illustration to explain that the stock ECU will adjust itself to be right at all times as if it were "3D", and the basemap will not change to compensate when needed, as if it were "1D". Simple vs. complex...
I agree that if he was to go get an actual tune, and needed something to get him going so he could drive to a tuning shop, then a base map would be fine, but there are people telling him to "just get a base map"
If you waste all that money to get an ECU, and a chip kit, and pay someone to chip it just to put a stock base map on it vs paying for a stock ecu, then you are retarded.
Last edited by NasTHatch; 07-30-2010 at 08:07 AM.
07-30-2010, 09:00 AM
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Re: P28 on a B18C1
A base map is not a tune and thats what i was getting at. we both already said and agreed that he is better off running a stock ecu because it will compensate itself to be right for the engine, the AFR's won't be just a "guess" and a shot in the dark.
If you waste all that money to get an ECU, and a chip kit, and pay someone to chip it just to put a stock base map on it vs paying for a stock ecu, then you are retarded.
If you waste all that money to get an ECU, and a chip kit, and pay someone to chip it just to put a stock base map on it vs paying for a stock ecu, then you are retarded.
Also, re-read the original post - he already has a P28 ECU.
07-30-2010, 09:18 AM
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Re: P28 on a B18C1
Read bold print in Fabrik8's post
If the P28 isn't chipped, you're running on a D16Z6 program, which isn't really great for running a B18C1. So it at least needs to be chipped with something like a P30 program (with the knock sensor disabled). This isn't really about fuel economy, this is about safely running your engine with something that is a much better approximation of the maps that it SHOULD be running with.
So yes, get it tuned. Efficiency will follow.
So yes, get it tuned. Efficiency will follow.
Last edited by NasTHatch; 07-30-2010 at 10:21 AM.
08-02-2010, 09:47 AM
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Re: P28 on a B18C1
Fabrik's post suggested getting it tuned as an option. I also recommend this option.
Disabling the O2, on the other hand, is the stupidest option so far mentioned. Why would you even mention it in this context?
It would be the knock sensor which, due to the P28's incapacity, would be disabled were he to chip it with a factory-like P72 basemap.
Additionally, the cost of taking his existing ECU and chipping it with a basemap is not that much greater than buying another ECU.
That is an economic decision which the OP can make based on his marketplace.
Thanks for signing your neg rep.
Disabling the O2, on the other hand, is the stupidest option so far mentioned. Why would you even mention it in this context?
It would be the knock sensor which, due to the P28's incapacity, would be disabled were he to chip it with a factory-like P72 basemap.
Additionally, the cost of taking his existing ECU and chipping it with a basemap is not that much greater than buying another ECU.
That is an economic decision which the OP can make based on his marketplace.
Thanks for signing your neg rep.
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