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Old December 29th, 2004, 01:28 PM   #1
 
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Somebody Help?? Very odd before and after Dyno.

This is a dyno of my car with V1 intake. Then switching to the V2. Was not the same day, but it was colder out so should have been better numbers. It was the same dyno, and same gas. Just switching the intake. I made 8 less wheel horsepower with the V2 over the V1, and 3.5 less Ft/lb torque. So, I guess I should switch back to the V1 or Injen? Any suggestions? The top two lines are with V1, the bottom two lines are with V2. Peak horses before was 223.7. After was 215.6. It is hard to read because his printer was almost out of black ink. You can see the graphs though.


Last edited by Forrealjohnson; December 29th, 2004 at 01:31 PM..
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Old December 29th, 2004, 01:47 PM   #2
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Unless you had an OBD-II data logger hooked up on both runs, it's really impossible to say what's going on. There is just too much going on with the ECUs in these cars and their apparent multiple map setups. SAE correction should have compensated for temperature differences. Maybe the V1 really performs better. But then again it could be the other way around and maybe the ECU just dropped back off of the premium fuel map if you got some knocking, or if the ECU was reset. If the dynos were done in different gears (looks like it might have been but tough to read), that would have an effect also.

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Old December 29th, 2004, 01:51 PM   #3
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on what steve says.. bad tank of gas?
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Old December 29th, 2004, 02:03 PM   #4
 
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Quote:
Originally Posted by SteVTEC
Unless you had an OBD-II data logger hooked up on both runs, it's really impossible to say what's going on. There is just too much going on with the ECUs in these cars and their apparent multiple map setups. SAE correction should have compensated for temperature differences. Maybe the V1 really performs better. But then again it could be the other way around and maybe the ECU just dropped back off of the premium fuel map if you got some knocking, or if the ECU was reset. If the dynos were done in different gears (looks like it might have been but tough to read), that would have an effect also.


Thanks Steve, but it was done in the same gear. I did reset the ECU when I installed the V2, but ran two full tanks of gas through it. The Butt dyno felt better, but like you say. The dyno is how to tell. So, even if it was on the 87 map, that would just mean the performance map would bring it up to where I was with the V1. I used BP 93 Like I always do. I might sell the V2, buy an INJEN and keep that and the V1. It just looks like the V1 makes more power. I am confused..
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Old December 29th, 2004, 02:08 PM   #5
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Dyno again with ODBII set up and logging?

That's what I'd do.
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Old December 29th, 2004, 06:09 PM   #6
 
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Anybody have any input? Should I get the Injen, or just sell the V2 and put my V1 back on?
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