alberto_mg

I've been ******* around trying to get the ebay hard intake pipes to work with my stock air box and haven't had much luck with the lower pipe.

I bought these when I got the car as both of the stock ones had split and also the air pump had rubbed and worn through the lower one. I had to cut both sides of the lower hard pipe to get it to come close to lining up. I thought I finally had it a few days ago till I checked and the pipe was about to pop loose.

So I pose the question - do Hard Intake Pipes work with a stock airbox? If so, which ones? I checked out Gotham's but the bottom one didn't work either.

What about other cold air boxes like the M2 or Rotary Extreme? Do hard intake pipes work with those? I see a lot of pics where people use the stock ones with those intakes.

Please enlighten me...

Also - if anyone has a stock lower hose they can part with and ship to me b4 Thanksgiving, I would appreciate hearing from you today.

M. F. Luder

I had a set of those with my GReddy intake. It was a pain in the *** to get the fitment (espically on the lower one), but I managed to get it on there. When I went to the Apexi intake, I couldn't get them to work at all & went back to the stock (rubber) ones. From what I've heard, this is common for the ebay pipes. I've been told to spend the extra $$ & get the one's from the rx7store.

ptrhahn

iTrader: (9)

I use the ebay el-cheapo's w/ a CWR box.

The top pipe fit fine w/ shortened silicon couplers.

For the bottom, I cut the coupler to the turbo inlet pipe at a bit of an angle, to help complete the tight radius, then discarded the airbox coupler and short alluminum pipe, and just stuck the other side of the new hardpipe into the airbox, and clamped the filter directly to the approx. 1" that stuck through. Works great, but irritated the hell out of me till i got it right.

alberto_mg

Yeah, I can imagine. Trying ot make this fit has put me into raving mad fits. I got a bad temper.

I just ordered the RX7 store ones. Ray at Malloy has the stock lower one for ~$90 for all the necessary pieces, but I'd like to stick with hard pipes if I can. Hope this finally works.

I'd like to get an M2 or CWR or Rotary Extreme box when I have more $$ available. Any one know if the RX7Store pipes will fit?

Thanks.

DSMguywantsFD

my ebay pipes fit with a blitz sus intake, it was a tight fit, but it fit.

clayne

Ask SanJoRX7 about this one .

BATMAN

I was the first guy to R&D the prototype RX7 Store Stainless steel intake pipes that is made by my friend.

Perfect fit with stock intake box.

Fred Sickert

Made some out of ABS with foil tape (for insulation). Cost: $20 with couplers. Bottom one is a 45 elbow with a 90 elbow. Took me awhile to get the bottom one right. Can't understand why anyone making a kit couldn't get the fit right.

SanJoRX7

As best as I can tell, the pipes I got (which are supposedly the RX7Fashion ones) are a *major* pain to fit, if you want to call it that. The upper pipe was not too bad, but it's still too long...will need to grind/cut about 1/16" off of it to make it behave itself.

The lower pipe, on the other hand, is another story. This pipe does NOT fit. No amount of cussing, repositioning, or angle changing will get it to work. The pipe simply does not have the right combination of angles and length (in the right places, mind you) to even come close to fitting. Currently I've got the stock lower hose rigged up to work, but it's definitely a sketchy fit, and will need to be replaced as soon as possible. I'm considering hitting up a muffler/radiator shop to get me some pipe bent. Not sure how much this will run, or what the story is.

Oh, and for the record, I'm running the M2 aluminum box (it doesn't actually say m2 on it anywhere, but that's what the guy that sold it to me said it was, and it's quite professional...not just someone's backyard project).

Pics of the 12 hour day clayne and I spent wrenching on the car yesterday here:

http://rx7.homeip.net/rx7/?album=%2F...ntake_install&

We bled my brake system, put new Motul 600 in. Speedbleeders rock for this (just need to put the extra one I have on my clutch line). Also, drained and refilled cooling system, but this was in vain because we didn't have enough coolant to get the mix right, so I'll be redoing this one myself. Completed the throttle body coolant bypass (many thanks to clayne for beta-testing on his FD first), and finally, but definitely not least, installed my intake.

Two small side projects that clayne headed up yesterday were removing the errant 10mm socket from inside of my rear hatch (yay!) and performing the ghetto nerd fix of my passenger headlight cover with parts from a PC

BATMAN

I have intake pipes from www.turbohoses.com

ptrhahn

iTrader: (9)

The reason its so tough is that they are all made from welded sections of pre-bend stock, and its hard to find pre bent tubes w/ radius that tight...

Kento

I bought the Gotham Racing hard pipes, and use them with an M2 airbox. The top (secondary) pipe fit fine; the bottom (primary) required some cutting on both ends (approx 30mm on one end, 20mm on the other) in order to fit. The bend radius is not tight enough, so the only reason it fits is because of the silicone rubber piping handling the other portion of the bends.

Fred Sickert

Makes sense. I cut two of the flanges off (on the outside ends) of the abs so it was pretty short when I was done. Shouldn't a muffler shop be able to bend one though, esp. since it is 2" ?

rockshox

iTrader: (3)

why bother with hard pipes? theres no advantage. i would think its a lot worse on the primary pipe couplings when the engine torques over.

clayne

Very little possibility of collapsing due to extreme vaccuum, or bursting due to pressure. Rubber or silicone couplings are used, so engine torquing isn't really an issue.

rockshox

iTrader: (3)

theres no pressure in those pipes. if you have that much vacuum in your intake you need a better one.

and the amount of coupler between the 2 pipe mountings is pretty small from the descriptions. theres probably about half an inch on each end of that short pipe to deal with easily one inch of engine movement.

alberto_mg

its not pressure or vacuum, its suction. the stock pipes split due to the force of the suction and heat over time. people have reported a slight gain in boost from using hard pipes.

Str8Down

??? Suction = Vaccum

alberto_mg

do a search for split pipes and you'll see why people use hard pipes.

BATMAN

The stock pipes has ribs which causes turbulence.

Contact turbo hoses and he can provide proof with Dyno results since he has tested all his stuff on his own dyno.

alberto_mg

I hate turbohoses. Their customer service sucks!! Get the pipes from rx7store. Get couplers from hosetechniques.com at least they provide good customer service and don't try and screw you when they send you the wrong product.

BATMAN

They provide the hoses and pipes to RX7store...... same product.

alberto_mg

who supplies who? i think you got it reversed.

BATMAN

turbohoses supplies the intake ss pipes to rx7 store

ptrhahn

iTrader: (9)

When I got my CWR box on, I had a low boost condition and poor response becuse the box sits far enough back that it just flexes the lower accordian hose enough for it to collapse under boost (must be SOME suction there)... the hard pipes, once fitted, eliminated two couplers and three hose clamps, and never colapse.... There might be some gain in lessened turbulence as well...