boxer koenig engine specs

After buying the carbed boxer and learning of the koenig mods it had done when new (at the cost of $50K) Walter Koenig sent me the specs for the package. I verified everything except the pistons at this time. I started this thread on it to keep it from derailing the "any boxers for sale" thread.
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login

 

That's pretty cool! Was the engine running when it was removed? And, do you think you'll need to rebuild it, or will you be able to put it back together and get it going quickly?

 

I think you did well with this one Paul. Looking forward to seeing it go back together -- it'll be nice to welcome you into "real" Boxer ownership now that you've got a carb model!

 

Anyway of checking if the car actually did 450hp with the mods ?

Dd it have the original diff from the factory ?

Interesting on what they would have thought of back then.

 

Yes the car was running fine but in need of a service when the engine was removed. I spoke with the service manager who was very familiar with the car and insisted there were no issues other than reseal and service. The compression test on an engine sitting for at least 4 years was great. I plan to do a leak down test and if all is well ill inspect the diff and put in one of my billet ones if its a welded one and put it back in the car. Shake down and address whatever else it needs then paint it, XWX's etc.

I may drive it and wish for my injected car.

Ill let you know once I remove the rear cover and have a look at the diff. Strapping it down and doing a few pulls on the dyno will tell all.

 

Definitely P6 cam specs! Cool stuff

 

450bhp is a big number from that engine. The Lemans engines supposedly made 490 but I believe the 'real' figure is 465bhp. The big chokes that engine has could certainly support it though.

 

My BB512 motor is 447 HP. The only change I would recommend is lowering the CR to 10:0 max 10.5

You will have pinging on very hot days, but 2 bottles of boost eliminates the issue

 

looks like you made a good decision paul!!!

selfishly, i am excited about the thought of yet another great boxer to be restored by your hand!

pcb

 

Just found these in the drivers door pocket. Fuel enrichment solenoids for 512 carbs, all four new in the box.
Image Unavailable, Please Login
Image Unavailable, Please Login

 

those you will need only for starting the engine when it is very cold outside. it is the "electric choke".

but good to have those, even you nearly never need them

those are the same as in a lot of VW ( rabbit ) had on the carbs. there it was the electric idle jet. so if you shut off the engine this idle jet closed and no fuel came anymore. when it is warm or hot outside those engines sometimes have not stopped even you shut off the ignition because there was still coming some fuel form the idle jet

 

Fuel required; 98 Oktan leaded.
If you can get some 100LL that would do the trick. The guides wont tolerate no-lead. LL= low lead but "low" as in Aviation low compared to high lead aviation fuel. Still much more than required.

I really like the look of those velocity stacks/tea strainers and keep knocking around doing that to mine.

 

Sidestep, just as information

Look here ....

 

I agree 11.5:1 is very high but proper cam selection will determine dynamic ratio which will determine what fuel I need, preferably without an additive. Ive had no issues with 10.5:1 compression ratios, its all about the combination of parts.

 

I would like to try aviation fuel in it! Love the stacks as well and with the scoops you can see them through the windows and every time you open the lid.

 

Very cool!

You know who to call in that case

 

"A boxer's like a box of chocolates, you never know what you're gonna get."

But you know its gonna be SWEET !

 

Do you want more than one carbed BB?

lol funny you say that, I read my signature yesterday and though how true. You just never know and I dont know why, it just seems to apply to these very special cars. This one does keep getting sweeter, I lucked out no question.

 

Well, yes and no, I worked very close with Tate at Caribu on the selection of parts as well as flowed carbs,exhaust, cyl heads etc before the assembly was completed.

There is a lot of hot air being ingested through the carbs, and you will find that heat will cause cylinder temp to rise especially in July.

Dyno time give us the almost the perfect fuel ratios throughout the range, with a little lean spot during the transition stage. The top end is choked down to 30mm instead of 32 for improved torque.
Nothing like a cool night to maximize HP on a Carb BB.

Also, it is warmer here is the real city.

 

Reducing the chokes to get more torque to me means that the cam selection is incorrect. Its a common mistake especially if what you want and what the cam supplier considers good are two different things. The other problem is a major short coming in the shape of the intake port that once corrected makes a big difference in torque. Smaller chokes to get back low end response means too much duration / intake valve closing time too late.

 

the BB koenig I have should also have those 450 hp as koenig told me.
the cams inside I don´t know how many ° they have because I never checked this. but not all the marks on those cams are TDC. you have to adjust those cams with a degree of disc. only so the engine will run fine. just now I don´t know those °, but the valve clearance for adjusting the timing has to be 0,5 mm, not to be confused with the normal valve clearance.

 

Thank you. Most professional engine tuners/tech know that those marks on the cams and caps are used only for assembly purposes and have little bearing on the desired/specified cam timing. All engine builders who are seeking maximum performance will use a proper degree wheel to set and verify cam timing, as you suggested.

 

Paul

If you want to argue about cam selection etc on a BB. You may take it up with Tate at Carobu.

His knowledge and scope of BBLM and BB engines is second to none and is well known world wide.

 

No need I have a good grasp on the subject and theres more than one way to skin a cat! Im interested to see how this koenig cammed car stacks up on the dyno against the 76 im doing right now. Old school lumpy low lift cams against more modern profiles that really wake these things up especially down low where we all want it on the street!