Dave you are a little past the airbox at this point, but could you be a little more descriptive about the airbox test. Stock filter? No filter? K&N Drop in? I am curious as to how the BR filter compares to the drop in and stock airbox. I think it would be an unfair comparision to have the BR filter compared to the stock filter and airbox. My understanding is that the airbox is well engineered, works and other's have picked up a tenth in the qtr by switching back with a drop in filter.

Also do you have any plans to sell a replacement lower intercooler to turbo outlet pipe that is more cost effective than some other vendors offer? I would be very interested in this part but don't need the bling factor chrome piping. Thanks!

 

The Buschur filter alone is good for 8 - 10 whp over stock in my testing.

Most of the time when I tune cars with the stock air box they are weaker than those with intakes

Stock air box is good only if you like to reduce the sound of the intake - but most people perfer to hear the engine breath

 

I didnt think this thread could get any better. I was wrong, I just caught up with the latest tests and I cant wait to see what the cams are gonna do.

 

This isn't the first time we have tested our products, we test them all as we build them and this is the actual complete 2nd round of dyno testing we have done on the same parts just on a different EVO this time. This is also the 2nd round of flashing we have done for our Stages, we just keep getting better

Our filter testing was done against the stock airbox with the stock filter. I did not test the stock box with the K&N drop in filter. To be honest I HATE the stock box, it is huge, ugly and I just don't like it. The engine bay in the EVO looks like any other modern car, with it's generic plastic parts and clutter, the filter is the first step to making it look good. It is also a nice power gain along the way.

I do stock the K&N drop in filter, it's $75. Our filter kit is $85.

No intention of making a new lower i/c pipe for the car from the turbo to the intercooler. Quite honestly anyone making one is just doing it for profit. For what the lower pipe does the stock design isn't going to be improved on much. It is already large enough and made of aluminum. It can't really be shortened with the way the turbo is and the FMIC from the factory. If you want to do a worthwhile improvement and can that long stock pipe go with our Deluxe FMIC kit, it comes with a very short lower pipe.

David Buschur
www.buschurracing.com

 

I am still curious as to the DYNO differences if any, b/t the stock box w/ drop in K&N and the open filter. Since you sell both parts the test would be fair to you and the consumer. Either way the results ended up, you would still offer both parts on your site.

Some how I knew you would offer the FMIC as the solution but I am not as concerned with the length of the lower pipe as the upper one. It is the diameter of the lower pipe and it's 1.5" diameter restriction that I would hope could be replaced by a Buschur upgraded pipe. It has been claimed to yield gains of 8-14whp by others who offer this pipe already. Am I hearing that you have no interest in developing such a part for those who retain the stock intercooler?

 

I understand what you are asking me for and what you would like me to do. As the car sits I can't fit the factory airbox back in it with our battery kit, mas pipe and i/c pipe. I honestly am not willing at this point of the dyno game to put it all back to test the drop in filter. I should have done it in the beginning but it slipped my mind.

I can GAURANTEE that there is not way in hell that changing the lower i/c pipe on the EVO to something larger is going to gain 8-14 whp. Believe me, if I thought there was a remote chance for even 3-4 HP I would build the part, but it isn't going to make any difference. The stock lower is about as good as it is going to get.

Sorry,

David Buschur
www.buschurracing.com

 

My own dyno testing confirms this theory as the most powerful intercooler combo on the stock turbo has proven to be the Buschur fmic kit with the uppper pipe kit, making a significantly greater power than any other fmic I have ever tested

Back a year ago we conducted a test of the Buschur fmic and it out performed the others tested by a significant margin

 

I appreciate you acknowledging the importance of the request. I also understand that you have worked your tail off changing things around to the point where it is a PITA to remove parts to prove a point. Maybe the next build up will give you a chance to test them head to head. I guess we will be in the dark on this one, however I know you will probably want to know and I hope you don't have trouble sleeping because of it As far as the dyno goes, it's too bad you can't test the other vendors lower pipe to offer the truth behind the (misconception). Whether it gains 3, 5, 12 or loses 13, I am still curious. Even you have been surprised by some of your own tests so far. It's exciting to KNOW for sure what works and what is a waste of time. I appreciate your informative thread.

 

20G 20G 20G.....When will you test the 20G!?!?!

I will be going stage2-3 with the 20G SOON and of course a custome DYNOflash, wanting to see what i can expect!?!!?

So now we need a new title for Al and dave, they are way past EVOgurus !!!!

 

I love testing, the knowledge gained is very cool. Too bad I didn't like school this much, maybe I could have passed a few classes!!
We took our standard FMIC off of our EVO yesterday. We replaced it with a straight piece of 2.5" SS tubing.

I wanted to get an idea how much pressure loss we were actually getting and see how much the whp was effect without an intercooler, using the same tune and alky that we had in the car.

I was pretty surprised. It is COLD in our dyno room. I am guessing it is in the 20 degree F range in there. So if ever not having an intercooler wouldn't hurt you much it would be on a day like it is today. Well, it still hurt and hurt pretty big.

Remember, when testing the car we only make a single 3rd gear pull, all pulls start at 2,000 rpm and run to 7,500 rpm.

The peak boost was completely uneffected by having the straight pipe on the car, the boost at redline, after two pulls, looked to be about 1 psi higher. We were reaching 21-21.5 psi at redline with alky kit on the car before and the boost looked to be right at 22 psi with no intercooler.

This is good as we do advertise this intercooler as having .83 psi of pressure drop. Looks to be right on the money with that number, maybe even a little less.

Now for the other surprise. Going from the exact same tune with an intercooler and the alky to NO intercooler and the alky the car lost 29 whp. That is pretty substantial considering the inlet air temps to the turbo being in the 20 degree F range.

Try and tell me now that a good intercooler doesn't make a difference

David Buschur
http://www.buschurracing.com

 

If one of you guys want to overnight me one of the other vendors pipes I would be glad to put it on the car and test it. I need it soon though as we are going to be putting on our Deluxe kit with the short pipe next and soon I won't want to go backwards again.

I will give an honest test of the part, hell if it picks up I will build our own.

David Buschur
www.buschurracing.com

 

I love this thread. Keep on with the testing. Now I know where my money is going when I get an exhaust.

 

David were you born in Missouri..(state moto "the show me state") lolrofl

 

I wasn't born there but I should have been!

The testing saga will continue on Monday. Pulled the straight pipe off the intercooler and now we are installing our Deluxe intercooler kit on the car. This is the one with the ultra short lower i/c pipe. This will be a good test to see if a lower i/c pipe will make a bit of difference. I am hoping for quicker spool up on it, we'll see.

BTW, your crank when in your new stroker engine today robi.

David Buschur
www.buschurracing.com

 

David / Al,

Wow! Great thread. Its information like this thread that is why I give vendors like Buschur and Dynoflash my business.

I have a new 05 VIII that I'm looking to add a bit more power. I plan on getting a dynoflash and a MBC (the 05 dyno plots from Al are insane!), and a Buschur exhaust. I'd like to do your Stage 0, although I might do it piece by piece to keep my warranty for a little while.

I have a couple of questions:

1. Given Al's impressive dyno numbers with the 05s, would you expect your various stages to have more power on an 05? Any rough estimate on what the output would be for and 05 running Stage 0 and Stage 1? IIRC, Al was getting 290whp with just a flash and MBC on an 05!

2. Also, when you put on the Axle back, I think you mentioned your HP jumped almost 15whp? Wow.... I never knew the stock muffler was so restrictive. If I were to go with just a BR/Al Flash, MBC, and your axle back, what might I expect power wise? I think if I did just that I'd be ok with my dealer warranty wise. I don't want to void it just yet.

3. Instead of the axle back, can I go with your 3" SCCA catback and keep the stock cat for a while -- then buy the 3" DP and HF cat later on and complete the system? Or does the SCCA Catback preclude you from going to a full 3" system because of the stepdown adapter? What do you think the net difference would be between the axle back and SCCA catback?

Thanks guys. I should have enough miles on the car to start modding next week, so I'll be calling you right away.

-Dave
'05 Evo VIII Tarmac/SSL (his)
'03 Evo VIII Lightning Yellow/DynoFlash'd (hers)
'05 Lotus Elise (ours)
'00 Porsche 996C2 aero (for sale)