jeff spahn

I can already see that this would be great for my S/C S4. Get rid of the stock intake, use greg's intake and rails. Mmmmmmm....... Smoother flow for the S/C, more power, looks better.

What is the line coming up next to the upper radiator hose on the passenger side. Looks like it could be a fuel line, or AC line or something.

ptuomov

My guess is that you'll underperform the stock intake under 3000 rpm and outperform it by a lot in the 4000-6000 rpm range. Just a pure guess based on the runner length and single plenum.

AO

That thing sure looks purdy! Nice job on the execution.

BTW, are those DR's air filters? Also I notice the cross bar is the same one Dr use to sell a long time ago. Mine finally gave up the ghost a few years back Carbon cracked and separated from the mount after some very spirited driving.

Randy V

No cowl cover either.

Scrap it.

GregBBRD

Like the jump post cover, there are reasons for everything.....keep in mind that this is a prototype and is very much a work in progress. The car has not been delivered to the client.

We literally removed the battery charger 20 seconds before these pictures were taken.....

And John's "Alpha N" box sits under that cowl....and we are not "ready to close up that box, much less put the cowl on.

I think Rob was trying to give people a "snapshot" of what we have been doing, for general interest.

Flint Ironstag

And here is a man who takes his work very seriously Pretty sure they were just giving you a hard time. That engine is easy on the eyes!

jeff spahn

When has Rob ever taken a snapshot of anything. He always does a full photo essay with the required obsessive detail we have all come to love.

GregBBRD

Time will tell.

What you are seeing is a very lengthy engineering study and a terribly long fabrication exercise. There's nothing, in there, that hasn't been studied, at length. While certainly there were compromises, they were kept to a minimum, by continuing the engineering process, beyond the initial "vision".

That being said, there are literally tons of automotive engineering "attempts" that have made it no further than the prototype stage and then directly into the trash can.

This could be another one of those.....

However, one can play "paper theory/the Internet says" only so far. At some point in time, "paper/the Interent" needs to be turned into reality and tested....beyond someone's "theoretical digital dyno".

This is one of those times.

What happens, happens. If improvements are required, things can be changed.....this "prototype" plenum is actually very funny to look at. It must have 50 sticks of welding rod in it, as we modified angles, locations, and design. We have a joke in the shop about it....

"Think how much easier this would have been if we could have bought aluminum in pieces larger than 2" x 2"."

GregBBRD

I know these people are just being funny....but on the Internet, some people will think that these are serious flaws that just got overlooked.

GregBBRD

I probably make 100 different custom products for my custom 928 projects.

The "problem" with the "928 market" is that it is very tiny. Pieces made one at a time, by hand, are very expensive. Pieces made by machine, in large quantities, (the only way CNC guys will generally want to take on a job) are cheaper (each) than making them by hand, but much more expensive, when there is an entire box full of them.

None of these intake pieces lend themselves to being made by CNC. They are very complex in shape and angles. Certainly "molds" could be made, but "molds" are very expensive and require some sort of a "long term payback", which is virtually impossible in the "tiny 928 market". And "molds" can only be made when something is perfected.....this manifold is a far cry from tested or perfected.

We have the "5.0 version" of this manifold beyond the thinking stage and know exactly what we need to do/are going to do. We have a "customer" for that manifold, It will be simplier to make, only because the runners will be smaller and the plenum will be smaller.

It will not be easy or "cheap".....there is still a boatload of fabrication and welding required.

mark kibort

and anyone looking for performance shouldnt really care. Its all about HP, and HP over the operating range in a gear. We saw this with the euro intake, cams and valves, where we matched the torque peak, but gained 40more hp in the range you would need it. If your ever drive your car and expect performance at 3000rpm, you dont deserve a performance car, you need a truck.

With my dyno runs on the 5 liter and now 6.4 liter, the engine only is used in teh performance range of 4.5k rpm and higher. so stick it on the 5 liter and see what flows!

Beautiful work. when do i get mine!!!???

Mk

andy-gts

Greg, that is pure art.....I am so amazed anytime you guys post this stuff....Is that edwards car or different customer?????

ptuomov

Breathe deep, get a glass of water, and take your nitros before anything bad happens! I was just ballbark guesstimating the difference between stock and this custom manifold, that's all. I wasn't saying it's good or bad, although it's obvious good since the car is already making more than enough torque at below 3000 rpm.

Rob Edwards

Wait'll you see the devil in the detail pics. I'm still trying to undestand exactly what Greg has done. It's, uh, complicated.

GregBBRD

Yes, Edwards. He is always willing to let me test things, lives very close, and drives different vehicles 99% of the time, anyway.