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what pressure is anyone who is running any 270 hp tune seeing

number1kyster said:
I can tell you my 2 bar read 16.6 multiple times last weekend while testing.

Yes, the 3 bar will read higher and provide more accuracy. My reasoning for sticking with the stock sensor was because I had read about a bad batch of GAP 3 bar map sensors. The last thing I want, is another thing to worry about while riding my YamaCat.

I only trail ride, so pegging my stock sensor at 16.8 will be a rare occurance. I also checked with TD, and they indicated that the stock sensor is fine, as long as I wasn't planning on adding more power than Max Spool 16.
Click to expand...

Yes I agree, I was told not much of a power gain if any, between the two Max Spool 16 tunes. I guess I have a touch of OCD in me huh. Just needed to know just how much boost I really had. Now I rarely check that if it still pulls it’s rpms, just pay attention to speedo and rpms mostly.
 

Motorhead said:
Yes I agree, I was told not much of a power gain if any, between the two Max Spool 16 tunes. I guess I have a touch of OCD in me huh. Just needed to know just how much boost I really had. Now I rarely check that if it still pulls it’s rpms, just pay attention to speedo and rpms mostly.
Click to expand...
They told me about 8-10hp difference at TD, said the 260 hp rating on website is 2 bar version, 3 bar with upgraded blow off is closer to 270. Not much if any gains from CAI with this tune since the muffler is the restrictive piece of the puzzle. Wish they would be a little more descriptive on their site for each tune, theirs alot of options and setups available and some of them are pretty vague
 
One question I had in mind is how does the ECU see the different MAP sensors. For example, whatever signal a 3 bar is sending the ECU (must be millivolt or resistance, or what?) at 15 lbs of boost, would a 4 bar MAP be sending the same exact signal at that same 15 lbs? Or, would a 4 bar be sending some different signal?
 
Turboflash said:
One question I had in mind is how does the ECU see the different MAP sensors. For example, whatever signal a 3 bar is sending the ECU (must be millivolt or resistance, or what?) at 15 lbs of boost, would a 4 bar MAP be sending the same exact signal at that same 15 lbs? Or, would a 4 bar be sending some different signal?
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A little research brings this up.
https://injector-rehab.com/shop/mapsensor.html
 
Wow, thanks!
The answer to my own then question is 'no'. At any given output voltage, there is actually quite a bit of difference in boost between a 2 bar and a 3 bar MAP.
As a comparison, at about 25 psi (approx. 11 lbs of boost) a 3 bar MAP is outputting about 2.75 volts. A 2 bar at that same 25 psi is outputting about 4.25 volts.
Makes sense then why a guy can't just change his MAP sensor without changing the flash. Duh.
 
Turboflash said:
One question I had in mind is how does the ECU see the different MAP sensors. For example, whatever signal a 3 bar is sending the ECU (must be millivolt or resistance, or what?) at 15 lbs of boost, would a 4 bar MAP be sending the same exact signal at that same 15 lbs? Or, would a 4 bar be sending some different signal?
Click to expand...
When I flashed the 3 bar tune onto my sled I had not yet replaced the map sensor so I had the original 2 bar. After the flash was complete I went to the dashboard on my gap app and it showed an error message about the sensor, calibration error maybe? I cant remember exactly what it said but Im assuming there is a correction or calibration factor in the file since 3 and 4 bar sensors have different usable ranges to them.
 
Oh didnt see what fourload posted......sorry haha but makes sense
 
Yes, exactly. Cannot change MAPs without changing flash. We can run different flashes on same MAP as long as all the flashes use same bar MAP.
 
number1kyster said:
I can tell you my 2 bar read 16.6 multiple times last weekend while testing.

Yes, the 3 bar will read higher and provide more accuracy. My reasoning for sticking with the stock sensor was because I had read about a bad batch of GAP 3 bar map sensors. The last thing I want, is another thing to worry about while riding my YamaCat.

I only trail ride, so pegging my stock sensor at 16.8 will be a rare occurance. I also checked with TD, and they indicated that the stock sensor is fine, as long as I wasn't planning on adding more power than Max Spool 16.
Click to expand...

Yes I agree, I was told not much of a power gain if any, between the two Max Spool 16 tunes. I guess I have a touch of OCD in me huh. Just needed to know just how much boost I really had. Now I rarely check that if it still pulls it’s rpms, just pay attention to speedo and rpms mostly.
justinator said:
They told me about 8-10hp difference at TD, said the 260 hp rating on website is 2 bar version, 3 bar with upgraded blow off is closer to 270. Not much if any gains from CAI with this tune since the muffler is the restrictive piece of the puzzle. Wish they would be a little more descriptive on their site for each tune, theirs alot of options and setups available and some of them are pretty vague
Click to expand...

Well then, that is a pretty good hp distinction between the 2 that I was not aware of. So they made a great tune even better by adding some hp, making it run cleaner at WOT and allowing the Boost to read more accurately at higher levels on our stock cluster. No one was trying to sell me this upgrade, I don’t think many thought it was worth the extra coin, but I did not care, I wanted it!
 
Motorhead said:
Yes I agree, I was told not much of a power gain if any, between the two Max Spool 16 tunes. I guess I have a touch of OCD in me huh. Just needed to know just how much boost I really had. Now I rarely check that if it still pulls it’s rpms, just pay attention to speedo and rpms mostly.


Well then, that is a pretty good hp distinction between the 2 that I was not aware of. So they made a great tune even better by adding some hp, making it run cleaner at WOT and allowing the Boost to read more accurately at higher levels on our stock cluster. No one was trying to sell me this upgrade, I don’t think many thought it was worth the extra coin, but I did not care, I wanted it!
Click to expand...
I will also go the 3 bar. My Powertrail SM 2 bar averages around 15.1 to 15.4. I want the max I can get in SM for my Doo buddies next year! How are your IAT temps running Max16? Mine stay pretty low with Powertrail.
 
Thats what one guy told me at TD , I didnt hear it from Bens mouth directly but I do remember him posting that when going to 3 bar the turbosmart was required and made more power since it runs higher boost levels than the 2 bar version of the tune.
Regarding intake air temps I never paid attention during normal driving but they peaked at 102F during a 25 second wot pull on a 30 degree day according to my log
 
justinator said:
Thats what one guy told me at TD , I didnt hear it from Bens mouth directly but I do remember him posting that when going to 3 bar the turbosmart was required and made more power since it runs higher boost levels than the 2 bar version of the tune.
Regarding intake air temps I never paid attention during normal driving but they peaked at 102F during a 25 second wot pull on a 30 degree day according to my log
Click to expand...
Did you ever see the knock light on that run. I am assuming 91 octane?
 
Zero knock ping detected on data log and I had about a 50/50 mix of 90 non ethanol and 91 octane with ethanol. Had a max of 1.5 degree of timing retard due to knock at one point but was average of .8-1.0 average. I was told it takes 2.5-3 degrees of timing retard to trip knock light
 
justinator said:
Zero knock ping detected on data log and I had about a 50/50 mix of 90 non ethanol and 91 octane with ethanol. Had a max of 1.5 degree of timing retard due to knock at one point but was average of .8-1.0 average. I was told it takes 2.5-3 degrees of timing retard to trip knock light
Click to expand...
Wow that data log is slick. I will have to get mine enabled for next year!
 
fourload said:
Wow that data log is slick. I will have to get mine enabled for next year!
Click to expand...
Best thing I ever did, I was able to confirm rpms through out the whole pull and monitor boost, intake temp, knock ping, timing retard (choice of 8 parameters at a time)and Im adding the air fuel module this week as well. Thats a bit pricey but I figured it might be a big help down the road if a problem arises with the fuel system or something gets out of whack. With this data logging you get to accurately view whats going on with your sled and whats normal for your sled. I think once you have a “norm” for your sled you can occasionally make a log and give your sled a health check. It was nice to be wot and not trying to read boost and rpms. You wont be dissapointed with the feature. They simply send you another flash with it enables and you update your flasher and load onto sled like you would with a tune.
 
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