I have no cat's, just a mid and downpipe and am considering removing the airpump for a number of reasons. First to save weight, Second to make some space in a overly crowded engine compartment. Has anybody noticed ill effects from the removalof this belt driven device?

 

Water pump belt will/can slip without the airpump belt assisting. Racing Beat makes a pulley to take care of that problem.

 

i was also curious about this, only on my 89 Turbo.

I have a race pipe and gutted precat.

does the airpump have any other purpose for 89 turbo's...i just want more frieking room to work on...i have no emmisions testing...

 

Yank it out. I have the RB dual pulley for the alternator and the water pump runs fine with the dual belts on it.

 

what about on a n/a?i mean,other then 5th&6th port actuation...will i be backkfiring all the time?i guess the acv wont be worki'n anymore...
d

 

Ain't nuthin' wrong with that! My car pops and backfires, I like it.

 

hmmm...what if i happend to not like that?flat outa luck?

 

My car will not backfire to save its life, and I dont have any cats, air pump, or ANY of the smog equipment. Backfiring only happens when your car is running rich and you cut the throttle. My car is running kinda lean. Not so lean as to mess things up, but lean enough to make it so my car doesnt backfire, and will not shoot flames either

And the extra room is very nice.

 

damn that is one sweet looking engine bay mazdaspeed7
how much power are you putting through that thing?
do you have any dyno sheets?

but yeah with the airpump I am putting my heading and presilencer on this monday

if I left the airpump on there I still should have my sick ports working right, were if I took the airpump of would I lose the ^6ports

 

Im not too sure on the exact power output, I havent got it on a dyno yet. But I am around 220 bhp or so, on the stock porting. My MAF sensor is the biggest restriction on my car right now, and Im working on that. I also need a cold air box, because myintake temps go sky high sometimes with where the filter is.

 

Yeah, you should go with the dual alt. pully! I did it on my old 87 T2 & removal of the air pump, lighter and I think it helps cool with less crap inside the engine by the turbo side. Maybe a slight real HP gain because of the engine not having to work the pump! Its my next slight mod to my 88 T2 I have now.
Yeah sweet engine bay! I like to detail mine too!

 

Thanks for the help guy's

Which dual pulley do I need? The alternator 2 sheeve pulley, or the 2 sheeve main pulley, or both?

 

thanks mazdaspeed7...i'm kinda glad to hear that.sounds,like,if i set everything up right,i wont be popi'n away down to road...heh.can you say s-afc...
david

 

heh.i could not help myself but post 1 more post...this is about the 3rd time i have finnaly gone into the triple digits with my post count.just had to look at that 100 this morning
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You need the dual sheave alt pulley. It underdrives the alternator by 13%. The main pulley is also a 13% underdrive pulley. I have both of those pulleys, and would not recommend it if you have any extra electrical load, such as a stereo or electric fan. Whenever the electric fan is on, the headlights dim below 2K rpm.

Other than that, I really like the RB pulleys and would definately recommend them.

 

Woh , ok. ok. Very important question. My 89 actuation works off the pump. Now you said that only my 5th and 6th ports work off the air pump. What about the others. Now if I get my 5th and 6th port sleeves taken out will I not need the airpump and will my 1-4 ports be working fine. Will I get better top without lossing low. Remember 89 are quite different in the effects of this removal. I got no deffinate ansewer in the history of this forum. Well I have only been on for a month so. Well sorry for the questions but mabey some one can give me hard facts.

 

I am a turbo guy so my knowledge is limited, however i believe that the air pump is neccesary to operate your 5th and 6th ports. As far as i know the standards ports are not affected by the removal of the air pump. With the air pump removed, I would think the only way to operated the auxilary ports is to wire them open, which as was stated will casue a loss in low end torque. I may be wrong though.

 

thnx.