Manco project

[father87]

I'd love an update as well. Also, what is this hemi vs non hemi predator engine? Never heard of that til now.

 

[Poboy kartman]

I'd love an update as well. Also, what is this hemi vs non hemi predator engine? Never heard of that til now.

Yeah...well..."hemi" is short for hemispherical. It basically means the head is half moon shaped in the combustion chamber.

Dodge engines were pretty much the first to use this design....(hence the commercials: "That thing got a Hemi?")

Well....it has it's advantages...as it's a little more efficient in igniting the fuel charge and excavating it.

The valves are also canted ...and that helps with valve shrouding. Sooo...the short answer is: the shape of the combustion chamber....and it's just a hair better performance wise....It's easy to spot...as the valve cover is cast...while the others are stamped steel.

 

[Denny]

I must disagree with you Doug. Hemi combustion chambers have been around as long as the internal combustion engine. Their wide spread use came into being during wwII in aircraft. Yes the canted valves help it fill and evacuate the combustion chamber better. But a wedge head (combustion chamber ) is more efficient at burning the gasses due to the squish area. The only reason the hemi's have a name is because of top fuel racing. They put so much liquid nitro into the combustion chambers that if you used a wedge head you would hydraulic the engine. Now a semi-hemi like big block Chevys and Buicks that is the way to go. Even the modern Chrysler hemi that is now in production is not a true hemi anymore, it too has a squish area.


Denny

 

[chancer]

Ok smart guy So is the Predator a Hemi or a Semi Hemi?

 

[father87]

I guess should rephrase. Which is the current model harbor freight is selling on their site? Or are both types still being made and sold?

 

[chancer]

Both. You have to look Close there are like three different SKUs,
1 is Ca smog compliant Non Hemi
1 one is regular
1 is Hemi.

However the HEMI is not available on line, In store only.

 

[Poboy kartman]

Denny...you're just confusing matters by using facts. It doesn't matter if I'm wrong.

It gave him enough information to work off of...Now...if you'll excuse me...I have some beer and I'm going to put some of that quench factor to work.

Most of what you said is correct...especially about top fuel cars hydrostatic locking. It's one reason they have more than one spark plug. But...they don't truly lock when they drop a cylinder...but...the race is over. However, they will still spit out the unburned fuel.

 

[chancer]

Well this thread has been successfully Hi Jacked

 

[Hellion]

I guess should rephrase. Which is the current model harbor freight is selling on their site? Or are both types still being made and sold?

Yep. Both are being sold and aside from a few subtle clues, they look identical. Supposedly the older version is being phased out by the newer hemi model.

The old: #69730 (stamped steel valve cover)
The new: #60363 (cast aluminum valve cover) HEMI

EDIT: The EPA/CARB: #69727 (Kalifornia version) But who is still dumb enough to be living there?

 

[chancer]

Harbor Freight Sale on Predator 212s. All 3 model numbers.
Coupon for 99 bucks. Valid through 7/31/16
This is a good coupon. Because the 20% off coupons are not for Predators.
Sorry I dunno where it is online, but it came in my ,Mailer!

 

[father87]

Harbor Freight Sale on Predator 212s. All 3 model numbers.
Coupon for 99 bucks. Valid through 7/31/16
This is a good coupon. Because the 20% off coupons are not for Predators.
Sorry I dunno where it is online, but it came in my ,Mailer!

Picture please? The new Memorial day sale 20% coupon specifically mentions Predator as prohibited.

So far I've spent $30 on carburetor and air filter, $12 on springs, I'm sure just buying a 212 Predator is much easier at times lol.

 

[Hellion]

Picture please? The new Memorial day sale 20% coupon specifically mentions Predator as prohibited.

Here's one I got off the website. Cropped and ready to go:

 

[intenseblue98rt]

Sorry I haven't posted an update. He loves the gokart and is getting really good at driving it. I want to do some minor upgrades on it this fall.

 

[Hellion]

Wow, you're back! We were all wondering how it went.

Got any photos?