JWT Intake Thoughts, Before/After Dynos, and Review
07-13-2008, 12:22 PM
#34
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hi, thanks for a very nice post. my questions:
what gear was the dyno done?
miles between the ecu reset and jwt dyno?
have you reset ecu in the past before this time?
do you think just resetting ecu (w/o jwt) would've made any difference?
what gear was the dyno done?
miles between the ecu reset and jwt dyno?
have you reset ecu in the past before this time?
do you think just resetting ecu (w/o jwt) would've made any difference?
07-13-2008, 02:26 PM
#36
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- The ECU reset was done after the first pull with the JWTs on. The first pull without the ECU reset gave an additional. The tech then did the ECU reset to help the system out so it could adapt to the new intake quicker. We then did about 10 more runs on the dyno and got the consistant numbers.
- I have done the ECU rest in the past. Did it after the "break in period." And then did it again after the HFC install.
- I don't really see how just reseting the ECU would have made a difference just in the sense I always drive aggresively. I always accellerate to the speed limit very quickly. That is my driving habit which the ECU should account for. The ECU is a big limiter on our cars so it might have made a little bit of a difference but it would have equaled out again. I had a couple 13HP/10TQ runs with the JWT but it settled down to 10HP/5TQ. I gave the best runs on the stock intake but the truth is that was what the numbers started to show consistantly. We did 5 pulls with the stock intake and the last three where all the same numbers. They saved the best of those three but they were all equal except maybe a .01-.05 here and there. We did a lot of pulls though unti we got consistant numbers for both the stock and JWT dynos. It took about 10 runs with the JWT though to get consistant numbers because of the ECU reset (I think).
Hope that answers your questions.
The car settled down to 10HP and 5TQ so that would be the final gains IMO. I got some better numbers at first but they dropped a little after the system adapted.
Last edited by bboysteele; 07-13-2008 at 02:28 PM.
07-13-2008, 02:50 PM
#38
Did the shop say anything about your A/F ratios? They look a bit leaner with the JWTs. Is that still within a safe range? Did they stay consistent as the ECU adjusted to the intakes?
07-13-2008, 02:54 PM
#39
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Now what we really need is someone in Cali to get these and take them to Technosquare so they can do that before/after reflash with both stock and the JWT intakes like they did with the Fujita. 
I asked them about this and they told me it is within the safe limit. I am being told though that if I get this number down which can be done with an ECU reflash then my numbers will increase. I am no expert though so if anyone can answer this then that would be great.
Last edited by bboysteele; 07-13-2008 at 02:57 PM.
07-13-2008, 03:15 PM
#40
I asked them about this and they told me it is within the safe limit. I am being told though that if I get this number down which can be done with an ECU reflash then my numbers will increase. I am no expert though so if anyone can answer this then that would be great.
07-13-2008, 03:40 PM
#43
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A/F Ratio
I have seen a lot of talk regarding A/F ratios and have seen some numbers thrown around like 11.6. This is a pretty rich ratio. Is this the stock ratio?
I could see it being that for safety reasons due to the compression ratio our engine uses and the point that most people will be using gas in the 91-93 octane range.
I can tell you that I have a Buick T-Type and from the factory it has a 12.7 A/F ratio with approximately 14 lbs. of boost and they ran perfectly safe with stock set ups.
I am just curious as to these real rich numbers. Max horsepower in any car is made just before detonation (knock) occurs. So leaning a car out (probably the reason bboy's first run was higher hp/tq due to the ecu not compensating more fuel for the increased air intake) will create more hp.
I am just trying to enlighten my old school mind here....
Also, btw....bboy and pms....keep up the good work....there are lots of people here who don't post a lot (me) that take everything with a grain of salt and appreciate the effort members like you make to help all of us. Don't listen to the people talking crap.
I could see it being that for safety reasons due to the compression ratio our engine uses and the point that most people will be using gas in the 91-93 octane range.
I can tell you that I have a Buick T-Type and from the factory it has a 12.7 A/F ratio with approximately 14 lbs. of boost and they ran perfectly safe with stock set ups.
I am just curious as to these real rich numbers. Max horsepower in any car is made just before detonation (knock) occurs. So leaning a car out (probably the reason bboy's first run was higher hp/tq due to the ecu not compensating more fuel for the increased air intake) will create more hp.
I am just trying to enlighten my old school mind here....
Also, btw....bboy and pms....keep up the good work....there are lots of people here who don't post a lot (me) that take everything with a grain of salt and appreciate the effort members like you make to help all of us. Don't listen to the people talking crap.
07-13-2008, 04:25 PM
#44
07-13-2008, 04:33 PM
#45
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I have seen a lot of talk regarding A/F ratios and have seen some numbers thrown around like 11.6. This is a pretty rich ratio. Is this the stock ratio?
I could see it being that for safety reasons due to the compression ratio our engine uses and the point that most people will be using gas in the 91-93 octane range.
I can tell you that I have a Buick T-Type and from the factory it has a 12.7 A/F ratio with approximately 14 lbs. of boost and they ran perfectly safe with stock set ups.
I am just curious as to these real rich numbers. Max horsepower in any car is made just before detonation (knock) occurs. So leaning a car out (probably the reason bboy's first run was higher hp/tq due to the ecu not compensating more fuel for the increased air intake) will create more hp.
I am just trying to enlighten my old school mind here....
Also, btw....bboy and pms....keep up the good work....there are lots of people here who don't post a lot (me) that take everything with a grain of salt and appreciate the effort members like you make to help all of us. Don't listen to the people talking crap.
I could see it being that for safety reasons due to the compression ratio our engine uses and the point that most people will be using gas in the 91-93 octane range.
I can tell you that I have a Buick T-Type and from the factory it has a 12.7 A/F ratio with approximately 14 lbs. of boost and they ran perfectly safe with stock set ups.
I am just curious as to these real rich numbers. Max horsepower in any car is made just before detonation (knock) occurs. So leaning a car out (probably the reason bboy's first run was higher hp/tq due to the ecu not compensating more fuel for the increased air intake) will create more hp.
I am just trying to enlighten my old school mind here....
Also, btw....bboy and pms....keep up the good work....there are lots of people here who don't post a lot (me) that take everything with a grain of salt and appreciate the effort members like you make to help all of us. Don't listen to the people talking crap.
