porshhhh951

deffenetly a good way to go.

My entire SS exhaust spent like 5-6 days at the polisher. Those pics really dont do it justice...it literally looks like jewlery.

goodluck with your project buddy...its going to be a screamer

shortyboy

what cleaner did you use for your parts and block?

Duke

I used a good friend and partner for that, I highly recommend going that route


I'll ask him to chime in about the cleaning process.

ehall

Way to go Duke. Good luck. This will be fun to watch progress.

shortyboy

btw,i have a similar set of bushings but i dont know what brand they are,what brand are you bushings?

Skunk Workz

Black Project...all info that is hinted to is that it might be a high-flow, pure bolt-in IC with NO cutting of the car needed.

Skunk Workz

Hmmm...why is that..?

porshaowner

944cs, your confused. A harmonic balance shaft is not the same as a crankshaft harmonic damper. There is a good chance that the engine will not shake just by removing the balance shaft belt, but if the shafts are out of time with the belt installed it will create a major vibration that will destroy things.

Laust Pedersen

I like that, finally somebody who admits their "boostaholic” tendencies and follows through.

Very interesting and inspiring project and nice pictures too; I look forward to the next installment.


On the balancing discussion:

A harmonic balancer/dampener counters the torsional oscillation of the crankshaft as described by Dinan in the referenced article. However its main balancing mechanism is an out of phase oscillation at the same frequency as the crankshaft’s first torsional harmonic (fundamental frequency), beating against the peaks of the crankshaft’s oscillation. As mentioned the rubber mount also has some internal energy absorbing properties, which can make it heat up. This also means that a harmonic balancer is designed to a specific crankshaft and is unlikely to work as intended on a modified (changed moment of inertia and stiffness) or different crankshaft. In the worst case (synchronous oscillation) it might do more harm.

The balance shafts counters (but not fully) the fact that pistons (pairs) pass the TDC faster than the BDC and therefore give an upward jerk to the engine each time a piston pair passes the top. This cannot be balanced out by other means, except by using infinitely long connecting rods.

Has anybody documented the HP gain obtained by deleting the balance shafts?

Laust

944CS

their job is the same, the link was just to give insight on what goes on in an engine. i have taken the balance shaft belt off and run a 944 engine for a short time, and it shook the whole car.

and i remember a post by john anderson, who dynoed a N/A 944 and gained...........wait for it.........2.5 hp

DDP

Laust, are you saying it is ideal to get a correctly matched harmonic balancer to a knife edged crank? Also that if you knife edge the crank it has nothing to do with the balance shafts because the b/s balance out the pistons and not the crank?

Olli Snellman

Ikea is for the Ladies, Biltema is ours


Somehow your enginestand looks familiar....




Here's mine




Nice job Gustaf, hope i can see all that "stuff" when i come over to Stockholm in January (will send my wife to do some shopping for example at Åhlens )

Let's see what we can do concerning that 968 wing...



I used this:

freddie_fish

Greetings everybody!

The name is Fredrik and I am building "The Green Hunter" together with Duke in the Revline Racing garage. (We also built The black Revline Racing track car last winter) Very excited about the upcoming work and we will for sure post loads of info for you!

I noticed a question about our cleaningprocess and tought i´d post a quickie regarding that.

First we put all loose parts into a bath of pure diesel for atlest 4-7 days
Then we prime with Hot Shot, Bräkleen from CRC or similar (here is also where we started the work on the big parts that dont fit into a bath.)
After this we use compressed air in a blend with pure diesel to spray down the parts, during this we also use a regular brush to by hand scrub the whole thing.
The last two steps contains a degreaser (a kind of soap) with water and after that pure water and a regular cloth to dry everything.

It takes a while but the results are worth it!
Cheers mates!

Duke

Weltmeister. They have both brand and part numbers casted in the sides.
I just need to get hold of a good teflon grease now to minimize the squeeking.

Duke

I know you're quite a boostaholic yourself Laust and I don't think you will be dissapointed