Type 4 buggy motor

[AirPower]

OOOKAY Lets get to the important bits.The motor.

You probably read that I was looking for a SCAT crank at first, but the supplier informed me
that SCAT only manufactures cranks for the type 4 once enough orders piled up, so that was a no-
go. I then ordered parts from Aircooledtechnology and these finally arrived today. I also got the
new Nikasil cylinders- 102mm - (all in one piece) and the MSD ignition system plus the turbo.


The crank is a 78mm stroked/counter-weighted crank with type 1 journals. The con-rods are
CBperformance race rods - 139.7mm which gives me a rod ratio of 1.79:1 which is not as high
as I was hoping for but should be OK.





These are the heads - LE 180's. I took the "BUS" heads instead of the better ported/flowed
LE 200/220's because I was a bit worried about the strenth of these due to more metal that would
have been removed from them (this is only my opinion).




The first thing I noticed was that the plug angle seems to be different and of course they
have bigger stainless steel valves installed. Porting has been done up to a point, but I'm not
done with them yet




This is still a big problem - the JE pistons they sent me are 96mm and not the 102mm I ordered.
Neither are they dished like I asked. The CR for a flat top piston will roughly come to 9.6:1
static, but with a 16cc dish it drops to 8.1:1 and I'm sure you'll agree, that's a bit better.





Other goodies are HD rocker shafts, bearings/gasket sets etc. I've already got the crom-moly
pushrods and a SCAT camshaft (276 adv duration). I must say Jake Rabe was not impressed with
my choice of camshaft, but since it's going to be turbo'ed I think the cam will be OK. It's
not a high-lift cam and should be easy on the rest of the parts.

Now the plan is to get the standard motor running to dial in the carbs/ignition and then the
performance parts will be installed (once I get the correct pistons) I also got a Inovate LM 2
AFR meter to get the air/fuel ratio correct (e-bay is an EXPENSIVE habit!!).

I would also suggest that you buy the following gift for the wife for womans month:


Because it's perfect for this:




I would like to thank Mike Egan at THUNDERSPORT for the effort to source and supply the initial
parts for me.

Tony_z, if you read this, I didn't take Jake up on that SAFEGAURD unit only because I'm trying
to get a hold of a new one which is modified to work with the MSD ignition. Thanks for your effort
though in following up on it.(that's just me - wanting new stuff and not 2nd hand).

That's it for now. Cheers.

Mario.

PS I think tonight I'm going to take that crank to bed with me while wispering "my precious" in that
sibilant slur of the LORD oF THE RINGS movie. NO wait - conrods tonight - crank later, NO wait the heads...

[Tony Z]

OMG.... its porn!!!!!!!!
Lovely stuff.... hows the wallet feeling?

[AirPower]

What wallet? - I now only use a tin for the change.

[Chris]

This hobby is expensive!

But awesome work!

[beetlefanatic]

Enjoy playing with your new toys! It's better than porn!

[Tony Z]

[flatfourfan]

aaaaaaaaaaaaaaaaah type 4................yummy.

Nice work there.

[Blitzkrieg]

Some of us build low budget Type 4's, others go all out

Personally, I would never buy parts from Jake Raby, even if I could afford them....



But it's looking very nice Mario, keep up the good work!

EDITED BECAUSE MY SPELLING WAS WRONG>

I'M STOOPID BLITZ

[AirPower]

I found this -- http://www.theoldone.com/archive/ - - very interesting. Read the section about "soft head technology" if you like (cylinder heads). From what I can understand the basics are that you need to direct inlet flow down one side of the inlet valve and down into the cylinder to actually push the exhaust gas out when filling the cylinder.

So you need to go from this


To this


Sooo - I've got 2 heads - are we gonna try this?

[Tony Z]

thats basically the priciples of 2 stroke scavenging.... That idea is loop scanvenging. You also have crossflow where it swirls across the chamber in a figure of 8 style.

That article has been around for a long long time. There is a lot more to it than just getting the air in. Its more about using the air that is in more efficiently.

[AirPower]

Nothing to do at work tonight so I thought I'd update this page a bit.

I'm STILL waiting for pistons, if you can beleive that!

The long and the short of it is that after some arguments with Jake Raby about the small pistons, he ORDERED me to return my own property to him for a refund and then promptly refused to sell me the correct size because I didn't buy the NIKASIL cylinders from him or LN Engineering.

So I got the refund (at least), then ordered ARIAS pistons (local guys), but after 2 weeks the guys asked me to send the specifications again, so I realized that they never even placed the order. More searching and I found Top End Performance in the USA who seems to know a little about NIKASIL cylinders. Once again order was placed and pistons are in the post as we speak.

I'm holding thumbs that these will be OK.

O ja - the buggy motor was started Monday, Runs very rough, but at least it runs. At this stage it's difficult to stay motivated so that for me was a major milestone in this whole project.

I'll post pics soon as I can.

Cheers
Mario

[Pine]

Hi Airpower, keep your head up and don't let anything slow you down - bestaluck!

Raby - sounds a lot like 'rabies' - coincidence?

Rabies (from Latin: rabies, “madness, rage, fury.” Also known as “hydrophobia”) is a viral zoonotic neuroinvasive disease that causes acute encephalitis (inflammation of the brain) in mammals. It is most commonly caused by a bite from an infected animal, but occasionally by other forms of contact.

The rabies virus makes its way to the brain from the site of infection by following the peripheral nerves. The incubation period of the disease depends on how far the virus must travel to reach the central nervous system, usually taking a few months.

In the beginning stages of rabies, the symptoms are malaise, headache, and fever, while in later stages it includes acute pain, violent movements, and the inability to swallow water (hence the name hydrophobia). In the final stages, the patient begins to have periods of mania and lethargy, and coma. Death generally occurs due to respiratory insufficiency.

In non-vaccinated humans, rabies is almost invariably fatal after neurological symptoms have developed, but prompt post-exposure vaccination may prevent the virus from progressing. There are only six known cases of a person surviving symptomatic rabies, and only one known case of survival in which the patient received no rabies-specific treatment either before or after illness onset.

[Chris]

Wow,2 months to wait for pistons?

So I was right about Raby.

[Blitzkrieg]

A lot of people go on and on about how good King Raby is, but your actual experience proves otherwise.

I still don't like him, or his arrogance

[AirPower]

I don't want to turn this into a lets rant against raby page, lets just say I'll avoid doing bussiness with him again - I'm 100% positive that there must be companies here in South Africa that can do the same job, cheaper and quicker than him. Then things don't have to revolution around his wallet.

Mario