Which is better? Thanks

 

i think the mandrel bent ones are better.. i don't know why.. but i know that WSP said their product is better that they are using Mandrel bent

 

Depends on what you mean by non-mandrel bent. If you mean crimped bends, then mandrel bent is definitely better.

 

First, off... SEARCH!

From WSP's (Warp Speed Performance, Inc) explaination, the mandrel bent pipes allow more and easier airflow vs. butt welds or bends. Make sure to get a Y-Pipe with a lined flex section (insde and out), unless you want the hiss usually associated with exhaust components, the "bees-in-a-can" sound. Warspeed makes both the economy (~$150) Y-Pipe that is not mandrel bent and the mandrel bent one for ~$320.

My thinking is that since you will gain a max of 15 HP or so from the Y-Pipe with a N/A engine the 5 HP or so difference between Mandrel bent and Economy Y-Pipes is worth the $200. Then again you can just buy an Economy pipe and get a JWT intake for $250 altogether and have the same gain as the Mandrel bent pipes.

 

Do you think that the non mandrel bent pipes might help keep some of the backpressure that the VQ needs and the low end torque that some people complain about?

 

mandrel bent pipes reduce the amount of turbulience created by the air rushing through the bends. less turbulience = less restriction = more air flow..

 

the Cattman pipe and WSP pipes have similar gains, but in different rpm ranges. WSP has better low-end gains and Cattman has better high-end gains. Look up the thread where WSP's sales guy talks about it. There was a link to a dyno scan done on the same car with mandrel bent Cattman and WSP. I think they were very similar as far as total gains, but like I said Cattman has better gains up high. Or it could be the other way around.

Find out for yourself at
http://forums.maxima.org/showthread....ight=warpspeed
the dyno is at:
http://www.geocities.com/breaux124/dyno.html

 

On mandrel bends, they put a mandrel into the pipe, then bend it thereby keeping the diameter of the pipe being bent the same throughout the bend.

On a crush bent, the pipe is slighlty crushed, thereby reducing the area available for air flow.

I believe most of the gain comes from the fact that you are removing two pre-cats and thereby allowing for a more pipe geometry (i.e. the pipe between the rear precat and the flange where it joins with the cat doesn't have to make a 180 degree bend in 4 inches of space).

That said, mandrel bends can't hurt.

-V

 

so wouldn't warpspeed be better when combined with an intake. You were saying that Warpspeed does better in the low range, so wouldn't this make up for any losses from the intake?

 

I was wondering about the performance difference between the budget and mandrel WSP Y's...

Also, someone mentioned that stock Y makes a 180 turn to go thru precats. Are Nissan's Y pipe mandrel or crimp bent? Wouldn't the removal of precats and the more direct route to the cat account for most of the performance gain?

RL

 

Personally I'd go with WSP's cheaper Y-pipe instead of the budget Y. They're about the same but I'll bet you WSP has better service, so if yours doesn't fit you can call'em and they'll fix itt or send you a new one. Plus they've been making maxima ypipes for about 3-4 years whereas budget is fairly new to the game.

 

If you'd have read the recent explotion of Budget Exaust treads, you'd know that they've been around a very long time and also have great customer service.

 

Sorry about that, I've just been hearing alot about WSP, so I'm a little biased. I know Budget has been around awhile altogether, but have they been making the Maxima Y's for that long? Just wondering.

 

where exactly do u go on their site to get prices and shipping info for maximas? Somebody told me that there was a maxima section but when i went, I couldn't find one.

 

WSP is here and Budget is here.

 

When I ordered last, the Budget prices on their website were in Canadian dollars, so don't forget to the do conversion back to US dollars, which makes it less expensive then it looks on the web site...

-V

http://images.cardomain.com/installs...884_7_full.jpg

Click on the link and you'll be able to see the difference between the factory y-pipe and the budget y-pipe. Underneath the funky looking matte black paint is 304 Stainless Steel. I don't have experience with the other y-pipes, but the fit was very good. I replaced the o2 sensors while I was at it. Notice the two big fat things on the factory y-pipe right after they come down from the manifolds. Those are the pre-cats. Notice that on the rear bank, the precat is towards the front of the car. The exhaust has to go down, do 90 degree turn to the back through the precat, then a 180 degree turn back towards the rear of the car where it joins with the exhuast gasses coming from the front bank. Both pipes use crush bends. One reason why the factory pipe looks so much bulkier as well is the heat shields that cover up the pre-cats so that the stuff under the car doesn't melt. The reason the aftermarket y-pipe doesn't have the heat shields is that without the pre-cats, it doens't get as hot down there.

 

alot of people have complained about warpspeed's customer service.. i originally was going to order one from them. it took them almost a month to answer my email. by that time i had already bought and installed the stillen..

 

i bought my ypipe from budget. it took 7 days for it to get to my house. good service. they take the time to talk to you and answer questions. easy install, just make sure you clean the O2 ports with a tap in case it doesn't screw in smoothly. other than that, it's an easy install. since the ypipe install, i've run a tenth (ave) quicker on all my runs! it's worth it. you don't have to spend big $ for big gains. the quality is there even in the pipe i chose to buy!