RE: GP29 race ported versus none ported 36mm kit

RE: GP29 race ported versus none ported 36mm kit
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RE: GP29 race ported versus none ported 36mm kit - 8/11/2009 6:31 PM

46u

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I ordered a GP290 race ported top end from DDM. For those that need to know I got a reply to my email from ONB after I placed the order. DDM GP290 race ported kits do not come with a wrist pin bearing and the ONB do or so I am told by both. Guess I will know for sure later this week.

I all so found out since the plating on CY cylinders has improved so much ESP is going back to porting them. He had refuse to port CY cylinders in the past.

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 1:50 AM

savagecommander

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esp is porting them due to demand. he still holds a negative opinion of cy plating

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 1:56 AM

SAVAGEJIM

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I remember that big stink some thime back, about CY skimping on the plating quality.

I also heard that CY was improving that plating. I say "heard" because I was not the one who said it. Mooman I think was the fellow who mentioned it.

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 1:59 AM

46u

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quote:

ORIGINAL: savagecommander

esp is porting them due to demand. he still holds a negative opinion of cy plating

Then some one is not quite on the up and up with what they are saying. From what I have read he has all the work he can handle with out messing with CY cylinders. One thing for sure if he is doing it because of demand he is backing up on past statements!!!!!!!!!

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 2:03 AM

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quote:

esp is porting them due to demand. he still holds a negative opinion of cy plating

I believe that is true and all, but....... makes me feel like "can't a guy catch an even break?"

I am working with a CY29 and am totally thrilled with it. But, it just nags on me always thinking it may give up at any time. Guess it is not the end of the world, just get another top end and keep going.

Wish zenoah would build a factory "hot rod" engine that would blow the others away and exploit the superior plating and materials we hear so much about. Since this will not happen, then I for one will just have to be content playing with the lowely CY and replacing top ends when needed.

I have read the stuff ESP has had to say about CY plating and the improvment they made to the 290 cylinder. I believe what he really means is when he modifies a CY cylinder, he is personally standing behind it for factors beyond his control. I would not be suprised at all if perhaps the new surge in modifing popular CY cylinders has to do with business agreements, and perhaps ESP is not standing all alone as to the reliability of the new modified heads.

Seems this may account for a change in practice without a change in opinion as to quality. I will bet ESP has talked straight all along, but business changes and you either change with it or die.

Dennis

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 2:07 AM

46u

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Zen is coming out with a 4 bolt 36mm top end not a whole engine.

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 2:11 AM

46u

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CY had to improved there plating if they still wanted there engines mount on the gopeds. Would have been a big lost of sales if they did not. Might not be the quality of ZEN but is better then what it was.

I plain on getting a ZEN 23 4 bolt one day when the 36mm ZEN top ends come out. The reason I will not be getting the ZEN 26 4 bolt is the 23 is about $30 cheaper and I will be putting the 36mm top end on.

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 2:18 AM

BigGrump

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quote:

I plain on getting a ZEN 23 4 bolt one day when the 36mm ZEN top ends come out. The reason I will not be getting the ZEN 26 4 bolt is the 23 is about $30 cheaper and I will be putting the 36mm top end on.

That is a real good idea........ Bet I end up doing something like that when the time comes. At least something to look forward to, and relieve the concern of the cY.

Dennis

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 2:30 AM

46u

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I think a CY is a decent engine not a ZEN but a decent engine. I all so think a lot of the problems with the CY has to do with the end user. Like I all ways say some can mess up an anvil with a rubber hammer.

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 2:31 AM

46u

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BigGrump do you all so run 1/8 buggies? Hobao?

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 4:26 AM

BigGrump

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quote:

BigGrump do you all so run 1/8 buggies? Hobao?

Yea, I have 14 other nitro trucks. I have given two other nitro trucks to my grandsons, and I own 10 electric rc's from 18th scale to rock crawlers.

I provide and maintain the cars and trucks for my 8 grandchildren and two son in laws. Back in 1986 to 1990 one of my sons and I raced 1/10 scale buggies, associated and losi. Now there is no more racing, but quite a bit of bashing and drag racing.

Dennis

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 4:41 AM

46u

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I am down to 30 RC cars and trucks, 2 helicopters and 2 airplanes. Don't you go to the Ofan forums? Only have one grandchild and hope he gets in to RC. Spent much of my life raising 3 girls as a single parent.

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 5:01 AM

BigGrump

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You are a better man than I. My wife and I raised 4 children and I can honestly say I could not have done it alone. Now that it is about over, I can look back and say great life. Glad I did not miss it.

Dennis

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 5:07 AM

46u

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At the time I thought it was the hardest time of my life and now I remember it being the best part of my life.

My GP290 race ported kit should be here Thursday or Friday.

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 1:20 PM

savagecommander

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i thought a big problem with the 35mm bore cy's was overtightening the studs- kinda tweaks the jug and with a stroker the piston rubs the plating off the bottom of the jug, but i guess it was just bad plating to start. all i know for sure is, when zen comes out with the 36mm kit, CY better have something to offer or they'll be right out of the market.

"Personally, I would not buy one, unless I could replace the stock engine with a Zen, if I needed to." his words....

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 2:52 PM

46u

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quote:

ORIGINAL: savagecommander

i thought a big problem with the 35mm bore cy's was overtightening the studs- kinda tweaks the jug and with a stroker the piston rubs the plating off the bottom of the jug

First if you use the recommend torque specifications this could not happen. Do not care what engine I was working CY or ZEN I am going to use the proper torque specifications!

In proper torque can warp any engine.

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 7:18 PM

savagecommander

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never owned one

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 7:41 PM

dc2 man

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looking forward to hearing your opinion on this race ported unit.

the nutech car i am running at the moment came with a 23cc cy and it performs excellent,it is up there with the best of them in my opinion........

the last few tanks i have run in the car it performed very well....

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 8:00 PM

46u

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quote:

ORIGINAL: savagecommander

never owned one

So then you really have no way of really knowing.

Going by others opinions are not all ways accurate as some can mess up and anvil with a rubber hammer.

So if you do not like CY engines or have any experience with them not sure why you are watching this thread?

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 8:43 PM

savagecommander

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dont base your judgement on two posts.

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RE: GP29 race ported versus none ported 36mm kit - 8/12/2009 9:08 PM

46u

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quote:

ORIGINAL: savagecommander

''Personally, I would not buy one, unless I could replace the stock engine with a Zen, if I needed to.'' his words....

I am sorry I think you are quoting someone else here but not very clear. Does not say who's words yours or someone else.

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RE: GP29 race ported versus none ported 36mm kit - 8/13/2009 2:27 AM

savagecommander

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those are esp's words- and he started raceporting the CY 36 mill, and should be availible on ddm rather shortly, as people felt his port work should be included in his decked 36 mill, and at the time the only availible "race porting" was from ddm's people- this is as i understand it. although i have spoken with doug on a few occasions and he puts reliability before everything else. now im sure the difference between companies porting work will remain to be seen.

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RE: GP29 race ported versus none ported 36mm kit - 8/13/2009 2:32 AM

SAVAGEJIM

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...all i know for sure is, when zen comes out with the 36mm kit, CY better have something to offer or they'll be right out of the market.

I know I will buy one of those Zen 36mm head kits, especially if there will be a ported version from like ONB, ESP on DDM, etc.

I'm not sure if the CY heads will be pushed out of the market; it will totally depend of the price. If the CY heads can be reduced much more in price when the Zen 36mm heads come out, price alone can keep them in the market.

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RE: GP29 race ported versus none ported 36mm kit - 8/13/2009 3:26 AM

46u

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ZEN is only going to make a 36mm 4 bolt top end NO 2 BOLT so CY will be the only one still making the 36mm 2 bolt. CY does not even make a 4 bolt 36mm top end so what is going to change??????

If Doug is only going to do CY cylinders because of demand then he is NOT true to his convictions and my opinion of him is not what it use to be! I have not talked to Doug but have talked to people at DDM and what Dave has post on forums. The ESP ported 36mm top ends for the plus 2 crank has been available art DDM for a few days now.

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RE: GP29 race ported versus none ported 36mm kit - 8/13/2009 3:52 AM

SAVAGEJIM

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quote:

ORIGINAL: 46u

ZEN is only going to make a 36mm 4 bolt top end NO 2 BOLT so CY will be the only one still making the 36mm 2 bolt. CY does not even make a 4 bolt 36mm top end so what is going to change?

Very good point. I for some reason never looked too closely at the CY large bore heads, so I always took it for granted that they are 2bolt only. It was not until I bought a couple of G270's that I actually had 4bolt engines. So yeah, CY would have to modify their large bore head to try to get into this new Zen 4bolt large ore niche.

But I know for sure, as I said above, I will definitely get one of these head kits to go on one of my G270 engines.

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