Stock size valves?After all that pretty porting?Just curious Art what turbos are you using again?GT35's?

 

We will be using GT35's, VR was nice enough to give me some of his older turbos

 

Just as an aside discussion, what are the largest turbos that anyone has installed on any of these cars.

 

GT42R's

 

Art!! AFRIKENMAZING!!! Nice port work!! hey are going to flow serious numbers!!

Is the Block or heads being receiver grooved for the o-ring gaskets?

 

now that is huge....

 

You are forgetting we are dealing with a displacement that is about 33% larger than a stock 996tt. Unlike the stock Porsche, every part has been designed to be a match flow wise.

In our origional tests we used GT35's, GT40's and GT42's. Each turbo excelled in a different area depending on what 5000 rpm range you want to operate. The motor will work well between 3200 and 9400 rpm's, however the turbo chosen decides what range the motor is most effective. None of them are most effective in the full range. The final decision will be dictated on the final usage of the car.

 

[quote=art4iza;2445759]chad, after reading half way through your thread and i almost creamed in my pants excuse my french. The whole work on one side and the lifts and head flows on the other. Pistons look amazing as well as the rods, wow Intense work and a huge research, congrats to you my friend. I think you know more than the whole porsche motorsports in germany [quote]

Art,

There isn't a single stock porsche part in the motor. Most parts like the oil pump, pistons, rods, crank, bearings, cams, cam housings, lifters, valves, springs, liners, liner housings, studs, head gaskets, oil squirters and keepers were designed and made by different members of our team.

The only stock part is the case and it was aline bored, shuffle pinned, bow tailed and machined for the three index oil pump along with machined for the 105.7 mm liners, 12 mm studs and vacuum main seals. Frankly, we have concerns of this spanish case being able to hold up to the potential power of this motor. The Boxer motor by design is very smooth up to approx. 7000 rpm's. However as the opposed pistons approach 9000 rpm's the forces are exponential and with the power we can produce the pressures can cause the case to explode. We are going ahead with this motor and the case we have. We will be limiting the upper end power in the mean time. We are in the process of having a billet case designed and manufactured to withstand the power potential in the upper rpm ranges.

 

Chad, your car will be a monster. is your economy file going to be a 2 cylinder cutout, so you run on 4 cylinders....

 

Haven't figured out the gallons per mile yet.

 

Chad, this will be something I've never seen before. I will keep reading more on that thread, I only went half way through, good work.
Joe, yes the valves are not stock highly modified and springs have been modified too.
Dennis, I know someone that has already used GT40's but have a lot of lag but on top....
I think Chad's experience here is extensive and has hands on with wealth of knowledge. I also hope not to blow my motor either

 

I hope you own a gas station (and you better not say you do)

 

Corey thanks for the kind words but I think if you look at Chad's port it stands out more. His flow #s and lifts are unreal. Second part of your question, yes.

 

If you only went halfway ......... skip to the last two pages. We have scraped the earlier rods and pistons and the new ones are in another world. They were CAD designed using the 962C's piston design as a core (a la oil cooling cores) and then we had plastic ceramic mock ups made to check all dimensions and clearances. In addition the rods were stretched to 132+ mm in length.

 

well after all this I need a smoke. Gotta go have a cohiba and a glass of Remy extra fine.