pratch

Apache allows lots of non-standard things. The site itself, however is being hosted using OS X server with the pdf downloads shuffled to a 'nix box to allow greater stability during these nice bandwidth using times.

http://www.totalimmage.com/maz.tutorials/

try that puppy. if it doesn't work, then I must surmise that your computer is not happy.

Cheers

DONNA

with such an outstanding write up i kinka hate to even ask this question,,,(maybe just wanted to bump the thread again),, but i am assuming that this removal means that you dont have a cat conv on your car, or it will destroy the cat true/false,,,,and, can u just remove the air pump and install block off plate and leave the nest in place hooked up,,or does it have to come off if the a/p is removed,,,,,and you certainly will not pass emmisions test with it gone true/false,, i have no cat but the rats nest seems to be working ok, but would like to remove the a/p anyway,,,

pratch

I'll wait for Carl to answer the real technical end, but if your concern about leaving the nest in place is for A/C, etc - don't worry about it. The tutorial car (mine) still has usable A/C, Cruise Control in addition to the vacuum lines to the dizzy.

ASEmaster

some tutorial suggestions:

1. water/oil cooler to air/oil cooler swap
2. electric fan installation
3. standard diff to LSD swap
4. any other swap/repair thread that repeatedly shows up every week...

pratch

Good suggestions - the electric fan is already on our list.

Keep them coming

White84SE

A little bit of help for the guys who want to do this... I've got a part number list for ya.. if you've got a NAPA store nearby (and really, who doesn't? LOL), take this list in, and they'll give you everything you need...
NAPA Helts and Hose Product Line
NBH H451 (5/32" vacuum hose)
NBH H173 (5/32" Fuel hose)
NBH H455 (5/16" vacuum hose)
NBH 3L220 (The belt if you've got a double pulley, skip it)

Balkamp Product Line
BK 660-1695 (1/2" vacuum cap)
BK 660-1696 (9/16" vacuum cap)
BK 715-1815 ( Assortment, has the t-fittings in it)
BK 715-1803 (5/32" vacuum plugs. Get two, package has 5 in it.)
BK 765-2682 (Hylomar gasket sealer)

There ya go.. didn't include the bolts, but they're easy to get.. total cost for me was $20.45, but I get a discount... have fun..

--Danny

Rx7carl

Thanks for the compliment DONNA. I've heard that about the cats too. Honsetly, I've done 2 of my cars and didnt have this problem. But I only drove with the cats still in for a couple of months each time. I would like to know if anyone has hard facts on this as the tutorial is always subject to revision and I can add a note if necessary. The intent of this is to facilitate the common mods everyone does and this seems to be a stopping point when they get to mods like headers and such.

You can just remove the a/p but then most of the other stuff becomes redundant and inoperative so why not do it right? No you will NOT pass emissions, hence the many references that are anti-tree hugger LOL. And the "racing purposes only" disclaimer at the beginning.

Rx7carl

Thanks White84SE.

Stripgear

iTrader: (2)

Donna,

If you remove any emissions equipment, your cat needs to come off or it will most likely overheat and melt.
After your cat is off you may remove just the air pump if you like.

Carl,

Your carb needs a vent. When you disconnect the vent solenoid and leave the solenoid in place, under certain conditions you can produce a positive pressure in the bowl and run rich or flood the engine. I had this problem until I removed the vent solenoid and made a plate for it.

Rx7carl

I'd like to know why the cat would melt? Do you know what causes that?

It still has the stock vent solenoid hooked up. It will still get 12VDC regardless of the stuff removed in the tutorial.

Stripgear

iTrader: (2)

Most of the emissions stuff (shutter valve, acv,etc) are designed to improve combustion efficiency and lower the amount of unburned hydrocarbons that gets to the cat. If you start removing this stuff, the cat will see more unburned fuel that it has to burn. This leads to higher internal temps, which can cause the cat to fail.

Very good!

Rx7carl

Ok, now I'm REALLY confused. So set me straight. My understanding is as follows. Air is added to burn fuel in the cat. Like an oxy acytelyene torch, you add oxy to make the flame hotter. Or with combustion mixture, lean is hot, rich is cold. So with this extra fuel in the cat without extra oxy to burn it, wouldn't it run cooler?

Stripgear

iTrader: (2)

Carl,

If you lower the charging efficiency too much you will get a misfire. In a misfire, you will have plenty of oxygen to burn the fuel in the cat. The rotary engine has a problem with this on decel which is the reason for the shutter valve. See this post.https://www.rx7club.com/forum/showth...hreadid=100433

Stripgear

iTrader: (2)

Also, the rotaty engine has a unique problem that adds a lot of unburned fuel and oxygen to the cat, the 3-3 misfire. see my post toward the bottom of this page.https://www.rx7club.com/forum/showth...threadid=19403

Rx7carl

Damn, where do you get all this cool engineering stuff?

Yzkiley

great tutorial but what about the after burner control valve. Where do u run the vacuum line to and what if I block it off will it be ok.

Rx7carl

I dont follow. Can you be more specific? Maybe give a page # on the tutorial so I can help you.

Danker06

iTrader: (2)

Friggin' Awesome!

MiniFoo

Any reason why you bumped this almost nine-year-old thread with nothing useful?

pratch

Because the tutorial, even after all these years, is still "friggin' awesome"?

We may not have gotten around to anything after the ICAI tutorial, and I now live 900 miles away from Carl, but that doesn't make the content any less valid.

My eldest is approaching the age where she's old enough to drive, and she's asked for my 7. I'm torn between getting her a different 7 and having her do the work with me, or, because I know the history of this one, letting her do some work on it and passing the torch.

See, I'd rather SHE get a good, known working car where I know the issues, than buying one and feeling compelled to tear it down. Of course, if I get her a different one, perhaps more tutorials will show up eventually...

(and yes, I basically just bumped an almost nine-year old thread - Oops)

7aull

iTrader: (2)

Thanks for clean, restored link!

Sure miss Carl....

Stu Aull
80GS
Alaska

Take-7

1) what happened to Carl?
2) nobody should get flack for reviving an old thread, if it didn't need brought up again then the thread should have been locked...
3) i see thread revival a lot on this site, the mods are pretty easygoing. i think that's cool.

Campbell97

Can u send me the link the rats next removal it won't load when I click on it

KansasCityREPU

iTrader: (9)

The http://www.totalimmage.com/ domain is not an active domain any longer.

t_g_farrell

iTrader: (1)

Use the wayback machine to get to an archive with the article. I found this pdf in there:

https://web.archive.org/web/20050430...al_1_print.pdf