Hi all,

Well we have a few new things I'd like to talk about quick and then let the questions fill in the blanks

3.5" CNC MANDREL BENT EXHAUSTS

We have our new 3.5" CNC mandrel bent exhaust systems instock now. We were able to invest in some special tooling for doing these systems which allowed us to keep the weight down on such a large diameter tubing. I just weighed one of the downpipes to get an idea where we are going to be and it came in at only 1 pound heavier than our 3" material, which you guys all know is the lightest available in SS. The downpipe weighed just over 8 pounds.

This is going to be a very tight fit. Forget about trying to run lower tie bars, it isn't even going to be a goal of mine to make it fit with them. It may work out but for now I am thinking probably not.

I am waiting on the 3.5" lightweight mufflers to come in for the system right now, when it does we will get what we have built.

Nice thing is we were really able to control cost and although it looks like atleast for now we will be the only one with a 3.5" system we are not going to screw you guys on pricing. Price will come in at $100 or less than our 3" system.

Remember, this is really not needed on a car unless you are making some very serious HP, I would say 600+. It is going to be loud also with tubing and mufflers this large there won't be much muffling to it.

HIGH BOOST ACTUATORS

We have a new stock appearing actuator for the EVO's. It is a modified stock actuator for running high boost. This is the BEST way I have found to keep the boost up on the EVO's when it is just out of turbo. My car is what I would call an extreme case of no boost. I can hit as much as 30 psi and watch it fall off to 16 psi by redline. No leaks, just an very efficient engine/head/cams and the stock turbo will not maintain boost.

This is a 26 psi actuator. In other words, bolt it on the turbo and just run a straight hose to it with no boost controller and you will see 26 psi. On my RS running this actuator with the manual controller backed all the way off as low as it would go I am able to hold an additional 2-3 psi at redline. No matter what I have tried in the past with the stock turbo I have not been able to do this. Not even with an external gate.

They will sell for $125, I need a core to do it although I have a few cores here.

The other option is the Forged adjustable actuator which you have quite a few options for different spring rates in, so you aren't stuck with just one high boost setting. I used this also, worked kick butt too. It is polished billet aluminum. It does require shimming away from the turbo if you want to use it with our deluxe FMIC kit that comes with the lower i/c pipe, any other kit it fits right up to. These are $140.

That's about it. Some things we have been working on.

Thanks for reading.

David Buschur
www.buschurracing.com

 

Must get 3.5". You guys arent doing any buyback for 3" systems are ya?

 

Buy backs on the 3", if it wasn't such a pain in the butt and if we weren't going to just make UPS rich I'd try and do something. You will be able to sell the old 3" without a problem. Our exhaust systems sell like mad.

David Buschur
www.buschurracing.com

 

So you're saying your new wastegate actuator holds boost to redline better than an MBC, and will thus keep the torque curve from falling so badly?

 

slappy im looking for BR TBE 3in.
pm if your selling and your mileage on.

 

mooreboost,

Correct. The new actuator keeps the swing valve closed tight so the boost isn't bleed off from the swing valve opening. Remember though, with our high boost actuator the minimum setting is going to be 26 psi, so an alky kit or race gas will be required. With the Forged billet actuator you can also keep the boost higher than with the stock actuator at redline but it is adjustable with different springs so you have some control. The Forged unit is $140.

David Buschur
www.buschurracing.com

 

David, PM sent.

 

Buschur is a

 

Dave, have you thought of using oval shaped tubing instead of round for the downpipe section? You can get more flow area and still have clearence for the tie bars.

Keith

 

****ing awesome!

 

Instead of making pipes oval to fit the two tie bars you could make available the proper size longer bolts and 1/2" spacers to help clear the exhaust for those that wanted to keep them. Likely their removal wouldn't be noticed for 1/4 mile cars and most road course cars won't really need the 3.5" exhaust but you never know. Worst case scenario you could find replacement metric bolts and washers at your local parts store. I'm assuming the 3.5" muffler will only be available with the Buschur Racing Muffler since I'm not sure there is a Magnaflow that large?

 

Over on jegs do a search on muffler 3.5 and it comes up with magneflow mufflers
http://www.jegs.com/cgi-bin/ncommerc...90&prmenbr=361

Take a look

Keith

 

Here is a pic of the 3.5 inch magnaflow in action on a setup that I built for my old 97GSX which was recently sold for an 05 EVO. I made the half turn down because I have alway been a fan of the RE Amemiya dolfin style exhausts. This setup was supprisingly quiet for being so large (3.5 inch from my homegrown 3 inch 02 housing back). I expect Buschur will be using the round version of the muffler which is only slightly louder than the oval, hopefully the oval will be available as well. for Buschur Racing.



And for those that think 3.5 is huge, here it is on the far left with 4 inch in the middle and 5 inch next in line with a T25 on the end.



jeff

 

What if you had a piggyback like a Utec to control the boost. Isn't this essentially limiting the duty cycle of the solenoid. Wouldn't this work?

 

What ever happend with that new race chip that Al made a thread about, he talked about it for a few posts and then stopped replying, he said it was going to be around $5-$15 and picked up 20WHP. You can just PM me information if you dont wanna get this thread off topic.