I am looking for something to regain the lost low-end power from my pop charger and straight-through muffler. The car just doesnt pull as good at the light. Will the UDP help me regain this power? What else will help me gain low end?

 

Y pipe. Or sell the Pop and get a CAI.

Not sure on this one...but maybe putting a silencer on the Muffler will help return the lost backpressure? Or is backpressure not an issue all the way back there?

 

The UDP will give you a good gain throughout the powerband. So technically, you'll feel more low-end gains. IMO I would get the Y pipe first because it'll give considerably more gains. Here's a good site: http://www.greghome.com/Greg's%20Garage/1999%20Nissan%20Maxima%20SE/Underdrive%20Pulley.htm if you want to find out more. You can also ask your dear buddy, I heard he's pretty knowledgeable in these kinds of stuff. He's pretty damn smart imo.

 

 

I personally think the Y loses more initial low end...less restricted air flow...

Erik

 

y-pipe and CAI are more geared toward the top end...makes ur car run lean...he needs to get more fuel and run richer..add an adjustable fuel pressure regulator and see what happens.

 

Buy a higher stall torque convertor if your auto and then buy either the JWT or G-force ECU.
http://forums.maxima.org/showthread....rque+convertor

 

So when I put this JWT Intake in My 95 GXE auto(no other mods) the car will be even slower!!!?

 

Yup. Hot air = less power/torque

BTW, CAI helps low end, so does Y-Pipe (according to medicsonic/sprintmax)

 

If your more of a daily driver, put the stock muffler back on it. You still get nice growl under WOT from the intake, your low end comes back and you run nice and quiet while crusing. Besied, I think "FART" mufflers are RICE anyhow. Just excessive noise we all really dont need on the road.

 

This debate will never end... NO, at WOT you will not be slower. The SI - CAI debate continues... LOL

 

By the way, I am unbiased, I have both a CAI and a JWT intake...

But right now the JWT intake is under my hood..

 

Its always hard to judge low end power with an automatic because the coupling efficiency of the torque converter varies a lot with temperature.

With 5 speeds, you can get a more "apples to apples" comparison day to day and before/after mods.

In theory, the velocity stack JWT intake should help -- but in practice, it is jammed up against the battery and the chassis framework around the strut towers and it is taking in hotter air. So it really can't pull in air as well as it could.

The resonator box between the MAF and throttle body is by far the largest intake restriction. Use the CAI upper section to replace it and keep the stock air box. That should yield a good improvement in flow.

 

Actually, I have never seen any gains at the track when the resonator behind the MAS is replaced with the upper CAI section. Will give a slightly different growl, but gains are iffy?? Nabil does have the upper CAI piece coupled with his SI intake though...

 

My problem is I dont go WOT all day long(waste of gas), so its not going to help me out if I put it, huh?

 

right now im running a CAI, custom B-pipe and stock muffler. I got soem low end power back by using the stocker again. It still has a deep growl at WOT still, even with a 2.5" B pipe. Y pipe and UDp are next

 

Just out of curiosity, what exactly are you getting the intake for?? The more the gas is pressed the faster you go If you don't give it any gas at all, then no, it is not going to help you out. And to answer a previous question in a different way... When I had my JWT intake on my 96 SE auto, it never made me go any slower. With the intake I was still able to spin my tires from a stop, without doing a break stand.

CAI = low to mid range gains mostly
SI = mid to high range gains mostly

But we do have those they love what they got and diss everything else... I have both and like them about the same... of course, the CAI is louder

What we need is for someone with both of them to go to a dyno and test them on the same car with a big fan in front and the hood closed, but that wouldn't matter either because it would still be debated LOL

 

So do you plan on keeping the stock muffler on?? I think this is the way I am going to go... I might get a straight through muffler to test at the tracks after the rest of the exhaust is done just to see if there is any time differences.

 

Clean your throttle body. It'll help a little. But since u got a '99, i doubt it'll make a huge difference. I need to clean mine, I bet it's as dirty as hell in there. Another good weekend project for me.

 

I guess I'm lucky, my pop charger and cat-back (Stillen) all gave me MORE low-end. Hmm....

 

 

My pop-charger (97 5sp w/ y-pipe)is awesome right now (20 degrees in michigan). I could swear I'm hitting 60 in 6 or less. Still loses low end (below 3k) In warmer weather, it sucks and I use the OSCAI. I don't like OSCAI though because it was pulling tons of dirt into my filter. I'm getting a cai in the spring probably.

 

I did that tonight and DAMN what a difference I was really thinking it wouldn't make a difference but I guess it does for some cars and not others glad mine was one of them

 

get some PVC piping and turn that pop charger into a CAI