Type 4 buggy motor

[vader]

Zoom Zoom Zoom

[AirPower]

WHAT? Where's the MAZDA?



Thanks for the interest everyone.

It's true - I do tend to go overboard with projects, but I don't want to look back and say "if only" at a later stage - it's all out on the ingeneering side. Keep in mind that the idea is to build something that will last more than only a few drag runs, I want to be able to drive it everyday and want it faster than the average car on the road.

So at the moment I'm searching for a company to open up the 1800 case to accept the bigger cylinders, and yes I do intend to ceramic coat the exhaust ports. The turbo is in the dustbin - after due consideration I think Tony-Z is correct on the airflow issue - it's going to go into surge at lower rpm. For now it's either a twin turbo setup (maybe 2 garret gt15's) OR one of the bigger garret turbos. I'm still looking at turbo maps to decide which one.

TIME is just in short supply.

[Pine]

Can't wait to see (and hear) it, keep up the good work

[Tony Z]

while you are at it, get the inlet and exhaust valves coated at the same time.

[Blitzkrieg]

WHAT? Where's the MAZDA?



Thanks for the interest everyone.

It's true - I do tend to go overboard with projects, but I don't want to look back and say "if only" at a later stage - it's all out on the ingeneering side. Keep in mind that the idea is to build something that will last more than only a few drag runs, I want to be able to drive it everyday and want it faster than the average car on the road.

So at the moment I'm searching for a company to open up the 1800 case to accept the bigger cylinders, and yes I do intend to ceramic coat the exhaust ports. The turbo is in the dustbin - after due consideration I think Tony-Z is correct on the airflow issue - it's going to go into surge at lower rpm. For now it's either a twin turbo setup (maybe 2 garret gt15's) OR one of the bigger garret turbos. I'm still looking at turbo maps to decide which one.

TIME is just in short supply.

I take it that you are referring to the 1800 Type 4. What size cylinders do you want to run?

[Tony Z]

Blitz.... go back one page for you answer

[Blitzkrieg]

Aah. Misunderstood as to which pistons are going where.

I think that those cylinders should just be able to slip into the Type 4 block??

[Tony Z]

no

[JohnHoffe]

On the coating issue: It is advisable to ceramic coat the combustion chamber, piston on top, up to the top compression ring, exhaust valve, exhaust port, exhaust, turbo housing.

The intake valve can be coated with a heat dissipating coating to dump as much heat from the intake as possible. This same coating is used on ventilated brake rotors on track cars. (Can be used on the cylinder barrels?). All of this is available from Sartor Engineering in Selby.

After doing my T4 components it seemed that the heat displacement from the motor improved dramatically. It is as if all the heat is dumped out the exhaust. Just be careful of the exhaust, I've measured my headers at about 200 degrees C. I have a couple of burnmarks to prove it.....

[Blitzkrieg]

Where is the best place to have ceramic coating done?

[Tony Z]

powercoat....

John, I'll post a link with some pics of the coating....

[Tony Z]

http://www.aircooledvwsa.co.za/viewtopi ... &sk=t&sd=a

[IMPI]

I know you are far from me but I have an old school machinist who does this type of machining for me. this guy once made type four cranks cut from a solid billet in the early seventies.
Armand

[JohnHoffe]

The guys I have used a couple of times is Sartor Bros Engineering. Speak to Gary.

195 Booysens Rd
Selby
011 493 1682

In one of my experiments I had pistons spay welded to close a dish & increase compression. After running them for a while I had to strip the motor because of bad engineering in another place. There was no flaw in the ceramics, even with the two different types of alluminium being coated on the same piston (possible difference in expansion rate).

[calooker]

You don't want to be ceramic coating any of the fins on cylinders or heads. They are there to disperse heat and if you coat them the heat will be retained, not a good idea. There was a experiment done on the Samba regarding coatings and or paint on the cylinders, best results were when no coating or paint at all was used, just bare metal.