Some people at the last Maxima meet brought this to my attention. It looks like Stillen crush bent that part of the pipe. You'd think Stillen would at least mandrelly bend their piping, but it does look like it creases inward. What do you guys think? I hope no possible loss of power..

 

what is it?

intake piping?

 

Sorry. I didn't know club gay won't let me host the actual picture. I attached the smaller version.

What do you guys think?

 

No it's not...

 

Didn't you notice that little indent in the area of my picture? My y-pipe doesn't have that little crease.

 

but your intake flow is slower than your exhaust flow.

I doubt changing this to a mandrel bent pipe will change much in performance.

 

True, but the supercharger is still moving an incredible amount of air. My installer said when he was installing it and put his hand by the blower it was moving a TON of air even at low RPM. He said he was very surprised that it takes soo long to build boost even with all that air at such low RPM.

 

There isn't a 'crush' on mine, IIRC.

 

The point is our blowers move an incredible amount of low end air yet don't deliever power until high in the RPMs.


































What's IIRC?

 

If I Remember Correctly.

btw, even if the blower does move an "incredible" amount of air at low rpm, it still isn't producing anywhere near maximum boost until the upper part of the rev band. This is the downside to centrifugal superchargers.

we need a roots-type blower..

 

Well you think with all the air it makes down low, you'd get faster spool and sooner. This guy has been in the business for a long time (www.ludespeed.com) and can turbo anything. He knows what he's doing, so I trust his judgement.

 

but the question here is: is that surface area able to deliver sufficient amount of air?

IMO, it is enough to supply the engine and by englarging the surface area, you probably will not see a great improvement in power. For instance, take stock cat-back and free flow cat-back as example. there is a 15whp gain on replacing stock one with a aftermarket one on a SC'ed max. that's for exhaust pipe where the gas is hot and loose and we are talking about double the surface area in some section of the cat-back.

the air from intake piping is much much cooler and has higher density than exhaust pipe. I wont worry about losing power over that section.


or

we can cut it off and hook up an aftercooler onto it.

 

Also keep in mind the stock throttle body on the 4th Gen is only 60mm (2.36") in diameter...

 

BTW if you're really looking for a bottleneck on the S/C kit... take a look at that rubber 90 degree bend off the output of the supercharger... it's flattened on the outer corner...

 

 

err yeah... we don't exactly spool... It's all dependant on that crankshaft.

 

 

LOL... I'm about to remedy this once my order gets in... gotta bust out the saw and grinder then...

 

what you got in mind? thats a tight fit up in there not unless you get a small U bend tubing and connect it.

 

how are you going to get around the headlight harness?

 

That little elbow does seem like it would choke smooth flow. What do you have in mind to replace it? There's pretty much no way to make it too much different becuase the S/C piping still needs to be able to bolt onto the engine block.

 

Yea our blower is sucky , it propels my car pretty good wouldnt ya say?

 

There you guys go (look up)... Matt always has a fix.



Ever consider swapping all the clamps to t-bolt clamps, Matt? You wouldn't want the piping to pop off with all that boost you're running.

 

But your running 14 pounds of boost sir . For a chump like me who is running ~8-9psi, it is alot different. BTW, nice setup...., looks like I cloned you w/o even knowing so. You think replacing our 90 degree elbows with a peice of home depot piping similer to yours would yield significant gains?

 

do it right!

 

Going down around to front - 10.5 X 20 X 2.87 - back up ....

 

So basically what your saying is, if I do exactly what you did, I will gain 5fwhp and 10fwtq @2000rpm?! And my spool will be quicker?

 

When I said spool I mean create boost. I wonder what a VQ35 crank would do? Hmmm....

 

Care to share where you got the tubing? Is it just the two silcon (sp?) sleves with a short piece of tubing in between?

 

Bling bling!

Spearco core? 10.5? That's going to be tall!!! Are you going to modify the bumper? A lot of the 10.5" will be blocked.

 

A friend of his custom made it for him in New Orleans. He just requested a plain crossover pipe and his friend came back with a bling bling chromed out pipe. Sweet deal good friend .

 

Craig, your blower probably does push a nice amount of air. BUT did you consider the amount of vacuum the engine produces naturally at idle??

So, to get alot more power down low, the SC would have to push above and beyond the natural amount of vacuum that the engine makes already.

 

sounds like he needs a turbo with a boost controller and set it to 5 psi while at idle


just messing with you Craig

 

Yep... but tube and fin.... I just have to avoid driving behind dump trucks filled with rocks, LOL.

I'll have to modify the metal bumper assembly some... My nephew just got an MIG welder so time to practice.

 

I was refering to the blue sleves used for the initial bend out of the SC.

 

With the 7.75" high IC, it comes just short from the top of the metal bumper support from underneath. I cut a good 2.5"+ off that support, and any higher would have resulted in chopping the whole thing into 3 sections.

You may want to remeasure the height clearance you have.


Oooooooo...... remember to stare at the sparks.

 

lol. Ok Ok, maybe not quite at idle, but it would be nice to have harder hitting boost starting around, oh let's say, 2400rpm? I bet MardiGras gets boost around 2000rpm. That must be nice. What kind of gas milage do you get Matt?

Jeff, yes I am aware of the vacuum. I'm just repeating what he told me. My car should be done this afternoon, i'll ask him about the vacuum pressure and get him to reiderate more.

 

If you want your boost to kick in that early you need to kick that big a ss 3.33 pulley to the curb and start coming down to a 3.25 to 3.125 or even a 2.87.

oooh from some website I forgot the name of it lets see if he posts where did he get it from?

 

The 4th Gen has some openings at the bumpber level so it should be OK... The thinner tube and fin will help as well. Just gotta avoid those pretty yellow loomed wires...

You didn't fit one of these on Jane's car do you?

 

My setup has the ability to start boost at a little before 2000 (in 5th gear if that makes a difference). I finally had a chance to see this yesterday in slow traffic... didn't get a chance to try for peak boost since there was too much traffic.


You mean that 1" strip? You can probably have the IC sit lower to compensate for the extra height. I'm not sure how low you can go before running the risk of denting the IC on a steep driveway.

No, I didn't fit one on Jane's car, but I've seen Nigel's FMIC install pics and it looks similar to the 5th gen.