DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum

DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum (http://www.ramforumz.com/index.php)
-   Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 (http://www.ramforumz.com/forumdisplay.php?f=83)
-   -   Loss of LOW END TORQUE!!! (http://www.ramforumz.com/showthread.php?t=122228)

manndhb3 09-24-2012 01:01 PM

Loss of LOW END TORQUE!!!
 
Anyone else here install JBA Shorty Headers and a Magnaflow Y on their truck(GEN 4) and notice a loss in pep during acceleration? On a positive note, I have def noticed that I am getting about 15ish MPG where I was getting about 12ish MPG depending on how aggressive I was driving!(all stop and go driving on a military post) Anyway, I was just curious to see how many people have experienced this. I would really like some input as to what I could do to get this low end back. Thanks in advance...:smileup:

thunder98110 09-24-2012 01:09 PM

You usually loose low end tq with long tubes. Jba claims that you gain an extra 20 torques at 2100rpm. Wait for a tune to come out to get back anyb power you may have lost.

snrusnak 09-24-2012 01:13 PM

What size pipe before and after the y pipe?

manndhb3 09-24-2012 01:20 PM

Quote:

Originally Posted by snrusnak (Post 895471)
What size pipe before and after the y pipe?

Same as before, 2.5 in 3 out

manndhb3 09-24-2012 01:21 PM

Quote:

Originally Posted by thunder98110 (Post 895470)
You usually loose low end tq with long tubes. Jba claims that you gain an extra 20 torques at 2100rpm. Wait for a tune to come out to get back anyb power you may have lost.

I have the Shorty, not long tubes...I am pretty positive it is the Y that is causing the loss based on some other threads I have read.

snrusnak 09-24-2012 01:24 PM

That's surprising, I wouldn't expect any loss in torque with shorty's going in to stock size exhaust. The diameter of the pipe is mainly what controls exhaust gas velocity, which effects torque. With the longer and larger primary's you do lose some velocity but normally it's not noticeable with shorty's.

moparornocar72 09-24-2012 01:34 PM

Do u have a cold air intake or different throttle body?

manndhb3 09-24-2012 03:07 PM

Yes I have a CAI and a TBS(just got it for the whistle and it was only 90 bucks)

will51 09-24-2012 07:01 PM

Strange, I just installed JBA's, Flowmaster 50 series muffler, and K&N intake and noticed an MPG gain, but no low end loss. I don't have a Y pipe though.

TheSatinPumpkin 09-24-2012 07:12 PM

maybe its leaning out a few points and needs to get a tad richer to compensate the additional flow.


All times are GMT -4. The time now is 05:51 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
vB.Sponsors
= Copyright RamForumZ.com a Gigathreads.com Network Site =Ad Management by RedTyger