Berk HighFlow Cat with muffler delete:- Lost low end response!

blumango · 07-04-2013, 07:33 AM

Hi,

Has anyone experienced lost in low end power/throttle response after installing Berk high flow cat coupled with a muffler delete? With the muffler delete alone it felt great but today, after the HFC installed, I felt a lost in power and throttle response. Will this improve after ecu adaptation? I drive a 7AT.

Cheers!

DEpointfive0 · 07-04-2013, 08:23 AM

Disconnect the negative terminal of the battery for a minute, then reconnect. Then drive the car really hard, redline it a few times. That will allow the ECU to relearn.

blumango · 07-04-2013, 09:00 AM

Quote:

Originally Posted by DEpointfive0

Disconnect the negative terminal of the battery for a minute, then reconnect. Then drive the car really hard, redline it a few times. That will allow the ECU to relearn.

Alright. Will give it a try.

Thanks for replying.

forza370z · 07-04-2013, 10:56 AM

Been there... Back pressure keeps your low end power/torque but restrict to the top/peak power. HFCs free up the back pressure thus you lose your low end power but gain at top. That's nature of the beast. I don't really think reset ecu will do much. Your best bet is to have your car tuned. That will increase your drivability.

UNKNOWN_370 · 07-04-2013, 11:31 AM

Quote:

Originally Posted by forza370z

Been there... Back pressure keeps your low end power/torque but restrict to the top/peak power. HFCs free up the back pressure thus you lose your low end power but gain at top. That's nature of the beast. I don't really think reset ecu will do much. Your best bet is to have your car tuned. That will increase your drivability.

OP, do you have any other breather mods?

blumango · 07-04-2013, 05:21 PM

Yes, K&N Typhoon intake, short ram. Car feels great with that mod until the Berk HFC

coolvans1988 · 07-05-2013, 01:18 PM

add ur OEM muffler back on, give that a try.

Sh0velMan · 07-05-2013, 09:31 PM

Take this for what it's worth, but when I put the PPE Long tube race headers on my car, the butt dyno said there was a loss in power from 2.5-4k RPM, but the real dyno said it picked up power. The others' advice about clearing the learned fuel data via battery disconnect is a good idea, you gotta drive it hard afterwards though if you want the ECU to adjust properly.

MIKE_STR · 07-06-2013, 10:42 PM

back pressure is a myth... It's all in your mind.

blumango · 07-09-2013, 04:52 AM

Thanks all for replying. Put my original mufflers back and it's punching strong again at the low end! However its much quieter now and I can hear some metal "zing" or buzz at high revs...think its from the HFCs?

corner3garage · 07-10-2013, 01:37 PM

Quote:

Originally Posted by blumango

Thanks all for replying. Put my original mufflers back and it's punching strong again at the low end! However its much quieter now and I can hear some metal "zing" or buzz at high revs...think its from the HFCs?

Could definitely be from your combination of exhaust and HFC.

The HFC do increase flow through the exhaust so the increased sound is expected.

-Mike

07-04-2013, 07:33 AM	#1 (permalink)
blumango Base Member Join Date: Mar 2013 Location: Singapore Posts: 75 Drives: 2010 370Z Roadster Rep Power: 13	Berk HighFlow Cat with muffler delete:- Lost low end response! Hi, Has anyone experienced lost in low end power/throttle response after installing Berk high flow cat coupled with a muffler delete? With the muffler delete alone it felt great but today, after the HFC installed, I felt a lost in power and throttle response. Will this improve after ecu adaptation? I drive a 7AT. Cheers!

07-04-2013, 08:23 AM	#2 (permalink)
DEpointfive0 A True Z Fanatic Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17152	Disconnect the negative terminal of the battery for a minute, then reconnect. Then drive the car really hard, redline it a few times. That will allow the ECU to relearn. __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

07-04-2013, 10:56 AM	#4 (permalink)
forza370z A True Z Fanatic Join Date: Oct 2011 Location: 403 Forbidden Posts: 2,512 Drives: 2009 NISMO 370Z Rep Power: 19	Been there... Back pressure keeps your low end power/torque but restrict to the top/peak power. HFCs free up the back pressure thus you lose your low end power but gain at top. That's nature of the beast. I don't really think reset ecu will do much. Your best bet is to have your car tuned. That will increase your drivability. cdoxp800, Trips, UNKNOWN_370 and 2 others like this. __________________ 09 PW 370z Nismo \| K&N Drop Ins \| HKS Hi Power \| Berk HFCs \| Work Meister S1 3P \| Project Kics R40 Neo Chrome Lug Nuts \| KW V1 \| SPC rear camber arms/toe bolts \| Southbend Stage 3 daily clutch \| Southband 19Ib Steel Flywheel \| ZSpeed CSC

07-05-2013, 09:31 PM	#8 (permalink)
Sh0velMan A True Z Fanatic Join Date: Jan 2012 Location: Dallas/Ft.Worth Posts: 3,349 Drives: Noisily. Rep Power: 21	Take this for what it's worth, but when I put the PPE Long tube race headers on my car, the butt dyno said there was a loss in power from 2.5-4k RPM, but the real dyno said it picked up power. The others' advice about clearing the learned fuel data via battery disconnect is a good idea, you gotta drive it hard afterwards though if you want the ECU to adjust properly. __________________ Buy My Car! \| Build Thread

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07-04-2013, 05:21 PM	#6 (permalink)
blumango Base Member Join Date: Mar 2013 Location: Singapore Posts: 75 Drives: 2010 370Z Roadster Rep Power: 13	Yes, K&N Typhoon intake, short ram. Car feels great with that mod until the Berk HFC

07-05-2013, 01:18 PM	#7 (permalink)
coolvans1988 Enthusiast Member Join Date: Oct 2012 Location: NA Posts: 402 Drives: 2013 370z PW A/T Rep Power: 13	add ur OEM muffler back on, give that a try.

07-06-2013, 10:42 PM	#9 (permalink)
MIKE_STR Base Member Join Date: Jun 2013 Location: Draper, UT Posts: 89 Drives: 2009 370z Rep Power: 12	back pressure is a myth... It's all in your mind.

07-09-2013, 04:52 AM	#10 (permalink)
blumango Base Member Join Date: Mar 2013 Location: Singapore Posts: 75 Drives: 2010 370Z Roadster Rep Power: 13	Thanks all for replying. Put my original mufflers back and it's punching strong again at the low end! However its much quieter now and I can hear some metal "zing" or buzz at high revs...think its from the HFCs?