I wanted to do a rats nest delete on my 1989 rx7 and I watched a ton of videos on it but I only found them on S4.
are there any major differences I should know about or is it pretty similar?

 

The best advice is to keep it. If the hoses aren't in great condition, you can replace them with nice looking silicone hoses for pretty cheap. It doesn't gain you anything to get rid of it.

 

Should specify turbo or n/a. Look up the manuals on rx7 foxed to compare.

 

its a N/A.
the reason I wanted to remove it is I heard that even though you don't gain anything, you don't lose anything ether and I wanted to clean up my engine pay

 

If you get rid of it, your engine won't idle correctly, and you won't have the function of your intake ports that open up at higher rpm. I promise that Mazda didn't give you extra parts. I definitely wouldn't throw them away by any means. I repainted my vacuum spider and then used some model airplane paint to color code where all the ends go. You can make it look nice and not crusty with a little bit of elbow grease and some spray paint. The color coding is extra.

I helped someone new to the forum a couple years ago that got rid of his vacuum system... he sold it to a 'friend' who was happy to take all of it. He had to buy all the parts back to make the thing idle and run throttle-wise, as well as run his vacuum actuators for his additional ports. It was quite an expensive lesson for him to learn.

 

ok. thanks for the input I think I'll leave it in and maybe just clean it up a bit.
thanks.

 

if you're doing a big build that's one thing (turbo, or straight up trailered race car). the problem is that the stock ECU is designed to work with a lot of things in the rat's nest:

1) the fast idle system so that you can reliably idle when cold
2) air pump controls the intake system to make power at high rpm
3) the ECU is tuned for the dilution of the exhaust air by the air pump

so when you delete it all it doesn't run so well.