I have the "official" Canzoomer CanScan unit.
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VAPIR ONE REVIEWS

 

I guess you've already seen it, your 3.50r7 should allow it to go above 8,192 rpm. Sure seems like it oughta get to 9,000 then.

There's a whole lot of rpm meters/gages that don't need an OBD-anything to measure rpm's. Can anyone out there confirm the accuracy of the tach?

Anyway, I've emailed Dan H. We'll see what he's willing to divulge.

 

Ok, we can compare then when we meet up again. Either you'll have an open invite or next month's meet, don't forget to bring your canscan and laptop.

 

sweet! The $140 price tag agrees with me.

 

the tach is off by a couple hundred rpm or so when it is showing 9k.

 

The tach appears to be about 500 RPMs optimistic at redline.

 

Nice, huh? The $7 shipping applies to either source too, so that's a wash. Possible 2.5% handling fee if from CZ, depending on how it's purchased from CZ.

Still no reply from Dan H. Gotta go for a few hours, maybe I'll have it when I get back...

Man, that's strange about the tach... don't know what to think.

 

When the tach reads 9000 RPM, the true RPM is about 8350 RPM.

 

yea... the tach is off a bit at redline, thats why you can vev the engine until about an indicated 9600 rpms

 

Hah! They did the same thing with the Miata.

 

Is everything in Mazda "sports" overrated then? geez.

 

I'm back. Still no email from Dan H. I'll definitely post his reply IF I get a reply. I wouldn't be surprised if he just blows-off my querry though, he might not want to get anybody riled-up, namely, CZ, for starters. But, then again, he might have something to say about it. Dunno.

 

Well, I'll be! Dan Harrison has indeed replied! And here it is in it's entirety:

Yes, it's basically the same tool as our CANScan, however Maurice has developed a more accurate calculation for AFR based on data from his testing and from Bosch. The more accurate AFR is used in tuning the engine. Also, we have bumped the baud rate on CANZoomer units to 38400 as opposed to 19200 on the standard units, again that is so the data log can get better than 4 samples at .1s intervals (40hz rate). Soon the CANZoomer units will be running at 115k baud allowing even faster data logging.
I have seen logs from Maurice that hit 9000, I can't get there on our RX since it's an auto and limited to 7500. There should be nothing stopping the scan tool from reading 9000RPM, but I will look into it if you think there is a bug.
Sincerely
Dan Harrison

The last part about looking into it was in reference to my telling him what Xyntax wrote ("Hmm... I have version 3.50r7 here directly from Dan. One thing I have noticed is that I have never seen 9000+ rpms on my logs even though I have hit the limiter while doing test runs.")

 

Cool. Thanks for notifying him Racer X-8! I hope it's just my usage of it and not a bug. That way it's easier to correct.

That sucks, CZ Canscan has more accurate AFR? So does this mean I can't reliably tune my CZ with the Harrison Canscan?

This sucks.

 

The Harrison-direct CS gives accurate AFR readings in closed-loop mode only. The CZ version is accurate for open and closed-loop.

 

I'm not sure what he is talking about with regard to a "more acurate" A/F reading.
The CAN bus provides a direct reading of the WBO2S. There is an A/F window, but who uses that, anyway.
Just log the WBO2S and multiply the result by 14.7 to get lambda. There is not an accuracy issue.
Also, 3.50R7 has a 38,400 baud rate, but it can be buggy.

 

In an e-mail from Maurice a couple months ago, he said:
"While the stock O2 sensor is capable of providing wideband readings, the correction table in the ECU to translate this into realistically accurate Lambda figures for AFR measurement is incomplete.
"Mazda was only concerned with conversion in closed loop mode, so it is only accurate in the 13.5:1 to 15:1 AFR range. Outside of that it is wildly inaccurate."

I'm no expert on any of this. I'm just relaying info I've gotten from Maurice and Dan.

 

Well, I replied back this way:

1) I thanked him
2) Asked if it was alright that I post it to this forum.
3) What is the time frame on the new 115k baud distribution.
4) Whether the 115k baud will be a CZ exclusive.
5) Told him that one guy posted that 9000 tach = 8350 actual - might be the reason for Xyntax's quandry - not sure.
6) Invited him to logon here and join in the fun.
7) Thanked him again.

And again, he replied:

Bill
The 115k baud version will be available in about 2 weeks or less, it's a matter of the Windows application actually, the baud rate of the scan tool is reprogram able from the application program, all existing CANScan tools have the capability. The CZ software will be the first to get the new 115k capability. On the tach, I don't know how accurate it is in general, our auto RX-8 has a 7500 redline but the highest RPM I've logged is 7210, that's not as large a difference as the manual trans guy reported.
I read the forum every now and then, I normally don't post since I don't want to appear as attempting to get free advertising on the non-vendor forum. You can use any of our email in the forum, no problem with me.
Sincerely
Dan Harrison

Nice guy! It looks like CZ has been doing his homework. It's all in the software - both the baud rate and the conversion from Bosch WBO2S raw data. That's why the CZ unit is $45 more than the Dan Harrison. Correct me if I'm wrong, but I always go by the golden rule "Go all the way, or stay at home". CZ will be getting my order shortly (in about a month ).

Interesting side note: Bosch in Anderson, SC is one of my clients and I know they make O2 sensors. I know a bunch of the engineers there. If I had the Bosch number I might be able to determine if the RX-8 wideband (5-wire) is one of them. Don't know what value that would be, but it would be nice to know...

 

soo....since the baud rate is programmable, we can use a canscan from DH with software from canzoomer?

 

Dan H. said "all existing CANScan tools have the capability", soo....yep. A picture's worth a thousand words, so, I thought I'd play a little...

 

When this thread was started, there was supposed to be a definitive post by CZ on this issue. So far, only Rx-8 friend has said anything.

Is this thread to be interpreted as the definitive post OR is there still work in process to determine a true FINAL solution?

Are future units incorporating this mod?

Rx-8 friend or CZ, please respond.

Thanks.

 

I received a Canscan from Dan that was his version and then I got the upgrade to Maurice's version and the PIC in the unit is different. I dont know if it's just for software protection or what, but you can NOT run the CZ software on a regular CS.

 

Its not protection.
You need the upgraded I/O chip inside the box. Dan will install it for you if you ship it back to him.
I had him just ship me the chip and I installed it myself. It is socketed.
It supports the higher baud rate.

Try running the CZ software on the regular CS, but use the lowest baud rate.

 

Ok, that comfirms what Omicron wrote in another thread in the Tech section. He mentioned a faster chip too.

 

I just emailed dan about this. This is what he wrote back about my new unit he shipped:

So... where does that leave us? heh