jobell

A couple months ago, I had a Warpspeed Y-pipe and hi-flow cat installed on my 95 Maxima. I have been tracking the gas mileage and see no real improvements. Any ideas?

LiGhtSoUt

iTrader: (6)

your really not gonna see that much of a gain in mileage just from those they free up the exhaust you may gain but nothign extreme

WhiteA32

iTrader: (20)

Its not technically suppose to improve gas mileage.

It will give you more HP. You should have noticed it at 2 points. 1 Right after you installed the pipe. 2 When you drove about 200-250 miles after resetting your ECU.

I noticed a little increase at 1, and a huge increeease at 2.

Is your check engine light on? You may have a code for a O2 sensor or something

Kevlo911

iTrader: (36)

Why did you expect an MPG increase?

vuiskool

iTrader: (1)

do the 60k mile tune-up. that should solve your mpg worries.

pscmj84

iTrader: (4)

I heard that the ecu will readjust to the new mods without resetting, can anybody else confirm this?

99grnmaxgxe

iTrader: (11)

Some people claim to gain mpg, and then some say that it makes it worse (probably due to their harder driving). I guess you should be happy that it didn't make your mpg worse.

f550maranello2

iTrader: (2)

i didnt notice any difference... all i noticed was the car got a lot faster after 3k rpms.. and dropped power down low...

jobell

Less exhaust restriction. I did notice a performance increase. Maybe I'll throw in a new set of NGK plugs.

jobell

To PSCMJ84: I see that you have a Warpspeed y-pipe installed on your Maxima. How do you like it? I saw a bunch of posts bad mouthing Warpspeed. I can't complain. My mechanic didn't mention anything when he installed it. Just that one of the manifold bolts snapped when he tried removing the old y-pipe.

pscmj84

iTrader: (4)

I have to say that I can't recommend the Warpspeed Y-pipe due to the crappy flex section. It sounds like it's common for the flex section to leak, even brand new. When the flex section leaks, this causes a hissing sound under hard acceleration. I'm going to try some exhaust wrap on the flex section to see if that helps. You can read about it here:

http://forums.maxima.org/showthread.php?t=530821