I was interested in an intake to give me a bit more guts down low. *pun not intended* I'm looking at a TurboXS Shortie Intake. I can get one for $139 on Scoobytuner.com. I could also go for a GP Moto intake for $109 on Teague's Auto. Is there anybody who has experience/knowledge on intakes for the MAF WRX? I read somewhere that these intakes won't cause a lean condition for the motor, yet it will give close to 10 hp. So, that's why I'm interested.
Good luck. The best thing you could do is run the stock air box with a good filter. I was running the injen intake, and there was not real power increase. I cut the tube down to make it a shorty intake, and in reality I probably lost power. The throttle response was a little betting, but the air getting into the system was 20-30 degrees warmer, and I probably lost power across the board with that. The incoming air was so warm, that the air temps after the ic was about 10-15 degrees warmer. Once spring rolls around, I am putting my stock box back in with a amsoil filter. I am going to connect the box to the back of the fog light with some dryer ducting to keep the box full of cooler air. If you are running a different turbo (other than the stock td04), keep the stock air box. The more air you flow (volume) the worse the intake is going going to screw up your a/f ratio. Russ
I don't have the stock turbo and I'm boosting at 16 psi, so I feel that can benefit from a better flowing intake to get more hp/torque. I understand that I won't be getting as cold air as the airbox, and I'm not disbelieving you, but I've heard of more than a few stories of effective intakes where they used the stock turbo with it. I would really like to use an Amsoil air filter, but the airbox is less focused on overall performance. Argh, decisions... decisions...
I've just finished doing some more researching on intakes for the EJ20, and I'm more confused than I ever was. I'll just buy that Amsoil air filter from you, Russ.
Intakes are going to be ok for the stock turbo, but as soon as you start flowing more air (ie bigger turbo), the intakes start to show thier weekness's. The stock box is good up till about 350-400 motor hp anyways. Unless you go short ram, but then the warmer air is hurting power. For now I would stick with the stock box until something comes out that is a good deal. Russ
I have a bigger turbo and run more than 16psi (in summertime anyway), and I'm using the stock airbox with no ill effects. I wouldn't bother with an intake, even if it was one of the ones that preserves the stock internal diameter (to avoid throwing off MAF readings).
Fong, if you want, you can try my short ram, but it doesn't give you any more power. Once Todd gets the dyno up and running, we can try some different combos. I still have the lower part of the intake to make it a cai. The only way I would swap to some kind of intake is if I was running a fmic, or I had some custom garrett turbo setup that did not allow me to run the stock box. Russ
I know that an intake in the engine bay will make the car breathe warm air thus making the motor more prone to engine knock, but I wrote to boxer4racing.com (Teague's Auto - great vendor by the way!) about it and about their turbo heat shield: <blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Dear Teague, I would like to know if your Turbo heat shield will fit perfectly over my VF30 turbo and under my APS TMIC. How well will it prevent heat from soaking into the APS intercooler I currently have? Is it stainless steel? An easy bolt-on modification, or will I need to remove more than the intercooler? My car is tuned for the stock airbox (Vishnu tuned stage 4 WRX). How will the GP MOTO intake help make more power throughout the powerband? What is the avg. gain I will get for the intake and what areas in the powerband it will benefit/hurt? I've heard that it's difficult to tune an intake that's exposed to turbulent air. Please add your input, it will assist in my decision to buy the products or not. Thank you! Fong Vang <hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote"> This was their reply: <blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">It will fit over the VF30 Turbo. I have not used one here in the shop with the APS top mount intercooler. It is stainless steel. It will shield the bottom of the intercooler if you have removed the factory heat shields. It is a easy bolt on installation. I do not suggest you add the intake with the Vishnu re-mapped if you are in a area that only has 91 octane fuel. If you have access to 93 octane and higher fuel the intake will yield a 6 to 9 hop gain over the stock box. The GP moto intake is designed with a bell shape mount to smooth the air as it enters. The cone shape filter with the larger intake allows for a larger volume of air to enter the turbo this is what yields the hp gain over the stock box. Thank you for your request. Dale Teague (Boxer4Racing a Division of Teague's Auto) http://www.boxer4racing.com <hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote"> Can someone confirm if what Dale states is BS? :???:
Like I said before, I would research carefully and see if you can determine the inner diameter of these intakes. If they are larger than stock, then your power gains are going to come from leaning the mixture. They might say it doesn't cause a lean condition, but they are probably operating on the assumption that it's being put on a car with the stock ECU (meaning it runs fairly rich)...so the leaning caused by the intake will offset your richness somewhat and still leave you safely rich. Do you know what AFR the Vishnu setup is tuned to? Or can you find out? This thread is probably worth reading, especially the second half of it: http://forums.nasioc.com/forums/showthread.php?s=&threadid=445364
Run the stock box. A vf30 isn't flowing enough air volume to worry about it. Fix the other screwed up parts. Do you have ic hoses yet?? How about the turbo inlet hose (the one the goes from the box to the turbo)?? Have you ported and polished the throttle body and intercooler hoses yet?? Those mods with get you more than 6-10 hp. I think I remember from back in the day of building chev motors, that for every 10 degree drop in temp (or raise) you will gain (or loose) 1% of you hp. If you are running 300hp (with a vf30 and a good tune you should be over that) and your air inlet temp go up 30 degrees, you just lost 10hp. those numbers are probably on the small side due to the turbo charging. Stick with the stock box, and once Todd gets the dyno up and running, we can run my short ram and cai on the dyno to see what it does. As for the inner diam, I think it is 2.65 inches, and the injen is about 2.67. not enough to give you and major leanout or anything like that. Russ
Thanks for the link, Zola! I'm still reading it. I'm willing to wait and see some dyno runs of some of our cars and modifications (especially an aftermarket intake run). I am sure this year will be a great year for many of us. There's a lot that will happen since the economy is picking up in MN and around the nation. I wonder how Todd likes working at the new shop so far. Todd?
