Do all after market air intakes increase high end and decrease low end? If this is the case, I'm sticking with my stock intake. The only time my RS is in high RPM's is on the on ramp to the freeway each morning and night. Low end is a lot more important to me. BTW I did a search and all they say is the after market intakes increase high end. I though there might be some other less popular intakes that will increase low end. Thanxs

Steve

If you get rid of the stock airbox (where the filter is), then you'll most likely lose some low-end torque.

Otherwise, you won't lose low-end torque, or even if you did, it will be really little. I have Larry's Intake, and it seems that I didn't lose any low-end torque, and increased the high-end power dramatically.

Doesnt a bigger (not HUGE, just bigger) exhaust and/or headers offset the loss of low-end with an intake? I always figured if I lost low end with an intake, I could always get more low (and hig) end power with a cat-back and some headers! This seemed to work on my Saturn (http://www.geocities.com/motorcity/factory/6672/) pretty well. Anyone?

Jon

Ok, uneducated man here..
I was always under the impression that a smaller exhaust is beneficial(at least for non-aspirated, within reason of course) in that it creates backpressure...which helps low-end. Bigger exhaust means better high-end? Right?

Neil

OK this is what I know from past, 1) yes there is air intakes that will increae low end! I dunno which ones for RS but they are out there for other cars, custom might be a good Idea! the PRM/Cobb tuning intake improves the trottle response, but doesn't really improve low end! as for exhaust you want 2.25" catback system with a 2.25"-2.5" Cat as Headers on the RS are really worth it, Stock are headerstyle and work really good, plus $$$$ for mild performance gain not worth it!

MY cheap Canadian $0.02! http://www.i-club.com/ubb-files/smilies/tongue.gif

From my knowledge, A bigger than stock exhaust WILL give you more power THROUGHOUT the powerband. TOO big of an exhaust will obvioulsy kill your low-end (like a 3 incher on a NA car) but a normal sized cat-back, 2.25", will increase everything. Especially headers. Am I right? Prolly not! What do I know!! http://www.i-club.com/ubb-files/smilies/smile.gif

Jon

Low-end torque is great but for only about a second. If you want your car to move when you stomp on the gas, get an intake and exhaust. Increase the torque about 15-20lbs from 3500-5500 and you will feel and see the difference.

GooseMan, your webpage says that your car is Rally Blue Pearl, you might want to fix that.

STORER, get a Ganz Flow or Cobb, you won't gain any low-end, but you won't lose any. The benefits will outweigh the cost IMHO.

So will intakes such as JC Sports and Rallispec decrease the low end power?

[This message has been edited by jImp (edited March 31, 2001).]

i've had my jc sports intake for awhile now. i didn't notice any loss of low end. if you do a search on the canada forum you can find my review.

almost any exhaust mod may decrease low end. With a freer exhaust flow, unburnt fuel may be sucked out of the combustion chamber before it is ignited. This only occurs at low RPMs because of the "slow" movement of the pistons/cams/valves. At high RPMs the increase in flow helps get all the dirty air out, and makes room for more clean air, resulting in a better bang. At high RPMs the valves are opening and closing so fast very little unburnt mixture gets out. However, when you let off the gas, the car may run rich for a split second, that little bit of extra fuel can be sucked out into the headers from the increased flow + a little clean air + hot headers + a louder muffler = bang, that trademark pop on throttle lift off.

There have been gizmos like the TGV in the WRX intake, that do the same thing in the exhaust system. They close at low RPMs to retain low end torque, then open up when the gas is stomped to increase flow. Nissan has chambered mufflers like this (the new Sentra SE-R Spec-V has this muffler).

That huge box under the hood scoop holds air when the TB is closed. When you hit the gas, the TB butterfly opens, and there's a nice large chamber full of air right there. With an intake, the long tube doesn't keep the air as close to the TB as the stock system. However, when the air starts flowing, it gets to the engine faster, and stays cooler than the stock system.

[Edit] Clarification, and spelling.

[This message has been edited by Jewbaru (edited March 31, 2001).]

yes they will, but it won't be to the point where it's unlivable. The gain in top end is worth it however.

[Edit] Double post.

[This message has been edited by Jewbaru (edited April 01, 2001).]

HERE WE GO.

After installing the Ganzflow intake on my Scooby, no LOW end power loss was noticed. Gained power in the higher RPM's. Drove it like that for a month.

Ten days ago, I had a custom fabricated Flowmaster exhaust system installed with a resonator, 2.25" diameter. Once again, there was NO LOSS in low end power. (Flowmaster mufflers are designed to keep some backpressure.) Overall power was gained. Big difference down low is that I can let the clutch out from a stop at idle and not kill the motor. Before I kinda had to rev the motor a bit from a stop, or it would stall. So now, in traffic, I can idle along in first gear and the car doesn't hesitate.

Gas mileage is up a MPG or two.

Debating aside, if you think about it, the more freely and engine can breathe in air and push exhaust out, the more power it will make.


Skylab