On my 91 egt, what intake system would work the best, I know there are probably more, but I was considering CTA Motorsports, Weapon R ( there are 2), or the K&N. Any reasons to pick one over the other or another brand? I need opinions!
My experience is with K&N, and there are two types: conical filter and drop-in OEM replacement. The OEM replacement won't get you much of an improvement unless you seriously modify the airbox. The conical filter is simply a cone filter that replaces the factory air box. If using one of these, your best bet is to run an outside air feed pipe to provide cooler fresh air to the engine rather than sucking underhood heat. The conical filter only replaces the airbox, however, so it doesn't have much in the way of visual appeal. With either K&N filter, you're apt to need some amount of modification to see any power gains.
with the 1.8 the general consensus is that no one makes a intake worth the money they ask for. CTA's is nice but its 3". On a fairly highly modified nonasperated 1.8 thats fine but its too much for most of us. You lose airspeed. 2.5" in a PLASTIC intake is what we need and no one makes it....
If you are looking at modifying your air intake system, then you should also look at doing something with your exhaust. This of your car as a person, if you can inhale easy, but when you exhale you blow out through a straw, you will tend to suffer.
A good intake has to be mated with a good exhaust to give best results.
I installed the CTA Intake piping and mated that with an RX7 (vintage 1998 natrurally aspirated) VAF. I then installed the 1998 RX7 K&N Filter Kit.
You will aslo want to look at either a CatBack exhaust or a custom setup that includes larger flexpipe and larger free flowing CAT. I got a custom 2.25" exhaust from that Manifold back with a 2.25" Flexpipe and high flow 2.25" CAT.
I notice an improvement in responce and power above 4500rpm, but this does not help at lower RPM.
Just adding to the questions.... I have a 91 Tracer with the 1.8 DOHC I was wondering about the mass air flow sensor on it what kind of cold air intake do i get to take care of that. If someone knows please e-mail me the link to mabey a place to get it or any ideas.
Thanks for all the info! I think I will do the exhaust 1st though. and Thunder, look at some of the engine pics in the car showroom and you can see how they hook-up. I would try to explain it, but I would probably not do a very good job of it.
Ok, the costs of what I did, I got the RX7 VAF from a BoneYard for $45 (All prices in CDN). Then the CTA intake piping and stuff was $140 (he gave me a discount as I was not taking the filter or the adapter..). The K&N RX7 FIPK kit was the most expensive at $175, and came with filter, a hugh adapter, and two bottles each of cleaner and oil.
After tuning it really rocks to the redline... and the throttle responce.... WOW....
If you have the time and the spare cash, I would say DO IT....
Hey mrvermin sounds good, but your pic's don't work? It might be my shity computer, I don't know buy all the pic's have a little red x on them??? Can you send me a few pic's or fit it or something, I don't know. good work.
Here's how you tune your ECU to change it's fuel mapping to correspond with the new intake (if necessary)
step 1: install new intake
step 2: remove negative (-) battery terminal
step 3: press brake pedal till everything is dead
step 4: plug wire back on battery
step 5: start the car up
step 6: drive it for a bit
step 7: wonder what the ECU is doing
step 8: know that the ECU is remapping the a/f mixture and the fuel curve :wink:
step 9: crack a budweiser and think to yourself "I'm so damn good, how can the girls resist me?"
step 10: look at your beer belly
step 11: realize while you have too much time on your hands to read this and then try it on your car
But why use an RX-7 Vaf....it's 3'' instead of 2,5 !?!?!? and...what does concern the tuning of the VAF sensor on the ECu?...is it still as james brutaly describes it or is it more ''scientifical'' hehehe and which RX-7 year ?