Author Topic: ESR 330 Failure (Read 53376 times)

broken1 · « **Reply #75 on:** September 25, 2013, 01:14:07 AM »

I used to run av gas in my R & never had any issues but since I got a stable job with no fear of winter layoff's I now only run race gas:joyous:

F-Red · « **Reply #76 on:** September 25, 2013, 06:53:37 AM »

I don't need the octane, just a quality fuel. The throttle responds using avgas in the article Dave posted, gives me a little reservation.

C-Leigh Racing · « **Reply #77 on:** September 25, 2013, 11:16:39 AM »

Quote from: F-Red;12946

It has to help, right? The new ESR pistons, don't have the three rows of oil holes. Just one row down the middle. I thought about added more, than decided not to. I did talk to Eddie at ESR, he thinks it is the fuel I was using. I'm going to use straight race fuel, no mixing with pump gas. Uncle Neil will be happy! :applouse:

OH YES, any time you use a good quality race gas, instead of the governments pocket filling ethanol crap pump gas, it makes me happy.
Do the gas companys care if that junk pump gas destroys your beloved 2 stroke engine, NO!, does the government, NO!, just another thing to rob the American public & make the rich even richer.
Neil

Langbolt · « **Reply #78 on:** September 25, 2013, 12:32:26 PM »

Quote from: F-Red;12946

The new ESR pistons, don't have the three rows of oil holes. Just one row down the middle. :applouse:

Your Cylinder doesn't have the Exhaust Bridge....so the Piston for that Cylinder shouldn't have the holes drilled down the center.....if so....you've got the wrong piston.

F-Red · « **Reply #79 on:** September 25, 2013, 12:57:03 PM »

Quote from: C-Leigh Racing;13016

OH YES, any time you use a good quality race gas, instead of the governments pocket filling ethanol crap pump gas, it makes me happy.
Do the gas companys care if that junk pump gas destroys your beloved 2 stroke engine, NO!, does the government, NO!, just another thing to rob the American public & make the rich even richer.
Neil

Well said Neil. The last piston was only ran on, supposedly 91 non-ethanol mixed 50/50 with VP-110. But i'm starting to not trust the gas station, I was getting the 91 from. I have access to Sunoco Supreme (112).
Neil, you mentioned in an old post years ago, that you didn't like the Sunoco race fuel. Why was that?

Quote from: Langbolt;13023

Your Cylinder doesn't have the Exhaust Bridge....so the Piston for that Cylinder shouldn't have the holes drilled down the center.....if so....you've got the wrong piston.

I thought that was odd myself. I wish now I would have asked Eddie about it. Those holes won't effect anything. I mic'd the piston, checked the UCCR. I don't know what that piston would be used for.
Does anyone make a big bore exhaust bridge cylinder?

rsss396 · « **Reply #80 on:** September 25, 2013, 01:06:24 PM »

i thought the old Prox cylinders without a powervalve had a bridge along with triple ports

C-Leigh Racing · « **Reply #81 on:** September 25, 2013, 06:55:18 PM »

The old big bore Wiseco & Wossnor pistons, will have the holes down the middle to attempt to keep the exhaust bridge cool, but the new machined ESR pistons, will have three sets of hole indentions so you can drill out those that you need.
The ESR cylinders, have the big main oval exhaust port & the two aux ports, so you need to drill out the sets of holes on each side of the piston to cool the small piece of bridge in between.
Sounds like you have the old Wiseco/Pro-x piston used on cylinders with bridged main exhaust port.

Everybody that has a Pro-x or ESR cylinders, what ever the bore size, needs to be using the new pistons ESR offeres that the machining on the sides are different to stop the port linking.
Neil

rsss396 · « **Reply #82 on:** September 25, 2013, 10:07:57 PM »

Quote from: C-Leigh Racing;13056

Everybody that has a Pro-x or ESR cylinders, what ever the bore size, needs to be using the new pistons ESR offeres that the machining on the sides are different to stop the port linking.
Neil

I set JON's cylinder up for a +4 stroke crank and the port linking on the old piston style is really bad, JON got the piston for free so I am sure he will use it but the next piston he should upgrade if they make a 78.5mm

Langbolt · « **Reply #83 on:** September 26, 2013, 12:14:59 PM »

Quote from: F-Red;13024

Does anyone make a big bore exhaust bridge cylinder?

Yes! Pro-X (CT Racing)

F-Red · « **Reply #84 on:** September 26, 2013, 01:21:38 PM »

Ok, I spoke with Eddie again. He said the holes are there, for some guys that want to drill them through. He also said, it can help with lubricating, but not a deal breaker. If you think you should have drilled
them out, because your piston heated up and seized, he said you have other issues. Some batches come to him with all three rows, some with only the center.

Langbolt · « **Reply #85 on:** September 27, 2013, 01:13:50 PM »

Holes ? Or Dimples ?

If you just have Dimples then you're OK.....I was Afraid you had HOLES down the middle and no exhaust bridge to cool them with.....causing fuel to pass through the holes into your Exhaust pipe (very small amount...but still fuel that should be going through the transfers and up to the Combustion Chamber.

F-Red · « **Reply #86 on:** September 27, 2013, 01:15:37 PM »

Just dipples! Spot holes for drilling, if wanted.

F-Red · « **Reply #87 on:** October 06, 2013, 09:43:08 AM »

This picture brings joy to my heart! After a nice little ride around. :onthego: :eagerness:

F-Red · « **Reply #88 on:** October 06, 2013, 10:32:04 AM »

Yea. Knock on wood and fingers crossed! And did I mention, this things pulls your arms out of the sockets! Between the cooler temps and race fuel,
she really rocks now. :ride::onthego:

Langbolt · « **Reply #89 on:** October 06, 2013, 11:08:09 AM »

Great to hear!!!

So what Needle are you using ? Clip position ?