Scott_GTR

As the title says really.

The main bearing in my Gennys engine let go Saturday[:@], and so I am looking at picking up a new block cheap off of eBay, (Which come with bearings)

I did read Cen had done some development work on the GST's NX76, but did they touch the block?

But knowing my luck I'll find the bore is a gnats cock out and end up having the buy the pistons/liner/crank etc again.[]

So are they the same?

If not, I may see if the bearing is a standard size and pick one up a high quality one from a bearing suppler.

.46NitroAddict

Hi Scott,

Sorry I can't answer your main question, but would also like to know more on this subject.
I can definately say that the bearings are a standard size. As mate of mine has just replaced his, (Gen LE) sourced from a local bearing supplier. Only cost him around AU$10 each (Was in stock). So probable worth a phone call or trip to price.

Hope this helps, .46NitroAddict [>:]

Scott_GTR

I have take the cheaper and quicker way out and bought a new main bearing for £3, ($6).

I just don't want to risk the GST block being different.

.46NitroAddict

Hi Scott,

Yeah that's just what my mate thought too. With a bit of luck CEN will still answer your main question, (& my additional questions) so we all know the answers for the future!

CEN Racing, can we please have the answers to the following questions?
1/. Are the Genesis, Nemesis, & GST blocks the same & therefore interchangable?
2/. Simmilarly, is it possible to use a GST head on a Genesis or Nemesis?
3/. Are the Genesis, Nemesis, & GST piston, sleeve & crank interchangable? ( I realise that the GST has been developed / tuned differently)
4/. Finally, are the Genesis, Nemesis, & GST carbies different & if so are they physically interchangable?

Many thanks in advance for your answers to these questions,
.46NitroAddict [>:]

Scott_GTR

I can answer No.2 as I have a black head on my Genny, as for the rest, hopefully they will get back to us.
Mind you, there are two versions; a black version of the old red head and one with a larger center between the fins
so there is better access to the glow plug. I am not sure what reason for this is, maybe less cooling on the big hole one?
So I have revised the questions:


CEN Racing, can we please have the answers to the following questions?
1/. Are the Genesis, Nemesis, & GST blocks the same & therefore interchangable?
2/. What is the difference between the two different types of black GST Head?
3/. Are the Genesis, Nemesis, & GST piston, sleeve & crank interchangable? ( I realise that the GST has been developed / tuned differently)
4/. Finally, are the Genesis, Nemesis, & GST carbies different & if so are they physically interchangable?

Many thanks in advance for your answers to these questions.

.46NitroAddict

Hi Scott GTR
I sent CEN Racing a 'pm', regarding a varied number if issues. I have received a fast reply to all my questions, & have pasted the relevant section to this topic below. Answers in red. (with Andrew's permission to do so!)

I think he's got all bases covered, as far as I was concerned anyway.
Regards, .46NitroAddict [>:]

Scott_GTR

It is just as well I asked this question now.

Scratch the carb comment, I took it out today, the new thinner oil in
the shocks work a treat , but 30 mins in I snapped the con rod!!! [:@][:@]


So Cen,......

Will a new piston, rod and sleeve assy fit in my ~18 month old Genny block???

If I read the above answers right, you are saying the blocks and cranks are
all the same, but the piston, rod and sleeve are different.

So will the whole assy drop into my Genny???

.46NitroAddict

Hey Scott,

As I understand it, (Based on Andrew's Replies) Yes your Genny LE will accept a GST type Piston Rod & Sleeve! Due to the fact that their physical dimensions are identical! (but not necessarily their characteristics - See reply for question 3 above).

You may want to seriously consider reading the [link=http://www.rcuniverse.com/magazine/article_display.cfm?article_id=819]RCU CEN GST 7.7 Review[/link], in particular the section on the engine, starting after this [link=http://www.rcuniverse.com/magazine/reviews/819/underhood36.jpg]Crankshaft photo[/link]. It states that Now last time I pulled my .46 down for a routine inspection my LE crank looked nothing like this! Perhaps a closer inspection of yours will also confirm this. In particular the counterweight? Mine is a solid lump - not hollow like the picture!

So to be sure the beast runs properly, it is probably a good idea to match the sleeve porting to the crank, that way you will be assured it will run properly & stronger as well!

A few things to think about / check!
Regards, .46NitroAddict [>:]

VDub99AML

My Feedback: (1)

I just took the backing plate off my Genesis LE, and found that the crankshaft is broken where the starting pin goes in. So, I understand that the crankshafts are different from the LE and GST. Can I just buy the crank from a GST though? It's hard to pass up a crank on the bay that's 1/3 the price of other places.

The Real Dogman

vdub if ts that cheap then try it and let us all know if it works but I bet hte timing is just a bit different(maybe better)

there is a possibility it wont work..In otherwords I dunno. lol


I know this doesn't help much, but

VDub99AML

My Feedback: (1)

That's alright, I'll give it a try. Thanks.

Scott_GTR

I think the cranks should be interchangable.

From what I have seen, all the main dimensions are the same,
(ie, beaing Dia's and spacing).

So any differances are probably just to aid air flow.