Lincs_Zed Posted July 23, 2018 Posted July 23, 2018 Morning Quick description i suppose. 2009 370z GT Ultimate with 76,000 on it. Recently bought the AAM short tails but when going to fit them saw that the midpipe flanges were rusted so bought the AAM midpipe aswell. Now the AAM website claims that the combination of midpipe and short tails results in around 22whp over stock. Took my car to get ECUTEK with the new exhaust already fitted and the first dyno run showed 322, after the tune 332. What are your thoughts? Was i wrong to be expecting more? i know the stock cats are restrictive. Quote
Jack94 Posted July 23, 2018 Posted July 23, 2018 To get a fair representation of the exhaust gains surely you'd have to dyno the car before and after fitting? You already had the exhaust fitted before you had it mapped so the tune is just optimising the car to the mods you've got. Anyways I always take any bhp gain figures with a pinch of salt considering a lot of them claim ridiculous figures for stuff like inductions kits 1 Quote
Jetpilot Posted July 23, 2018 Posted July 23, 2018 1 hour ago, Lincs_Zed said: Now the AAM website claims that the combination of midpipe and short tails results in around 22whp over stock. Took my car to get ECUTEK with the new exhaust already fitted and the first dyno run showed 322, after the tune 332. What are your thoughts? Was i wrong to be expecting more? i know the stock cats are restrictive. I am sorry to be brutally honest but i have no idea why people believe these manufacturer claims, in this case around 22whp, that could mean anything from 1 - 22 imho. 22whp on a naturally aspirated car from just an exhaust, i would like to see it. All dynos read different buddy, they are tuning tool, take the figures with a pinch of salt, if the car drives better thats all you should be concerned with, dyno figures are just pub bragging rights Quote
ZMANALEX Posted July 23, 2018 Posted July 23, 2018 Lesson learned I hope. As has been said, forget the numbers and just enjoy the car. If your bum tells you that it is now more powerfull then that is all that matters. Quote
nub Posted July 23, 2018 Posted July 23, 2018 5 hours ago, Lincs_Zed said: Morning Quick description i suppose. 2009 370z GT Ultimate with 76,000 on it. Recently bought the AAM short tails but when going to fit them saw that the midpipe flanges were rusted so bought the AAM midpipe aswell. Now the AAM website claims that the combination of midpipe and short tails results in around 22whp over stock. Took my car to get ECUTEK with the new exhaust already fitted and the first dyno run showed 322, after the tune 332. What are your thoughts? Was i wrong to be expecting more? i know the stock cats are restrictive. Which dyno was it and was it a hub dyno etc. Show us the chart Quote
coldel Posted July 23, 2018 Posted July 23, 2018 As always, area under the line is more important than peak BHP improvement which really doesn't show anything. You want to see daylight between pre and post tune lines all through the rev range, a car with a bigger peak BHP increase than another might not necessarily be faster or better to drive if the overall curve is poor. 1 Quote
Jetpilot Posted July 23, 2018 Posted July 23, 2018 (edited) We should really have a sticky for Dyno discussion, save repeating the same thing every time someone isnt happy with a read out! Maybe someone like HDev or Abbey could do a write up on what to or not to expect, what they actually use the dyno for etc etc Edited July 23, 2018 by Jetpilot Quote
Ekona Posted July 23, 2018 Posted July 23, 2018 Does it feel quicker? If the answer is yes then job done. Nothing else matters. Dyno numbers are for pub bores with tiny winkys. Quote
coldel Posted July 24, 2018 Posted July 24, 2018 Exactly if the mapper has got consistent gains across the rev range it will feel faster which is what you want. The number 332 is largely irrelevant as you do not have 332 at all times only for that fleeting moment when you are at those particular revs. Does the graph look improved? Ideally you will also see flattening, removes any troughs etc. Quote
nissanjuke Posted July 25, 2018 Posted July 25, 2018 I recently put hfcs on my car, no tune and when you hit the 4000 rpm in any gear, you would think somebody had shoved a rocket up its arse, I just love that instant power as if the car was going into turbo mode, so as the guys have said as long as you can feel the car and get a buzz out of it , your winning Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.