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Workshop => Engine and Bottom End => Topic started by: Grande huevos on February 01, 2016, 12:10:06 PM
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I'm torn between rebuilding my 330 or making the switch to a 350.... I know I have to get my cases bored or get new ones but do you think that a standard ESR 5 pipe and a 38 mm A/S carb would be efficient enough to feed that motor? It's not a lot bigger then a 330 and it seems to be working fine for me now... I'm just trying to see what all components that I would need and what I could keep off my curent motor and just swap it over.
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Guess that depends on what the "switch" entails. New cylinder and new porting? If you need to get your cases bored, why not throw a +4mm in there with the 78mm piston?
350 would be on the verge of needing a big bore stinger but not a must. I ran a 76x76mm (343cc) motor with a Sparks TT pipe & 39PWK for a dune season and it ran great.
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I ran a esr 350 with a drag port for a long time , 38mm carb and trx11 pipe , just gotta watch your jetting and temp. havinnoj is right a bigger stinger is needed.
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I went from a ESR330 to the 350. Kept the TRX5 pipe and the 38mm A/S carb. I did change to the larger UPP intake boot. Runs great.
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Guess that depends on what the "switch" entails. New cylinder and new porting? If you need to get your cases bored, why not throw a +4mm in there with the 78mm piston?
350 would be on the verge of needing a big bore stinger but a must. I ran a 76x76mm (343cc) motor with a Sparks TT pipe & 39PWK for a dune season and it ran great.
If I did it I would be getting a new ESR 350 cylinder most likely the engine builder kit sent out for mid range porting.. A +4 crank would be great but I have a perfectly good oem crank that I just had rebuilt with a pro x rod from Duncan not to long ago... I already have a Neil's HD clutch with Hinson basket 01 cr ignition boydseen rad valve....
I'm just going over my options on how I could set it up for more power while still trying to use what I have and spend little as possible out of pocket and not having to deal with the hassle of selling my old pipe and carb or whatever parts Id need to change
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If I did it I would be getting a new ESR 350 cylinder most likely the engine builder kit sent out for mid range porting.. A +4 crank would be great but I have a perfectly good oem crank that I just had rebuilt with a pro x rod from Duncan not to long ago... I already have a Neil's HD clutch with Hinson basket 01 cr ignition boydseen rad valve....
I'm just going over my options on how I could set it up for more power while still trying to use what I have and spend little as possible out of pocket and not having to deal with the hassle of selling my old pipe and carb or whatever parts Id need to change
If you're buying a new cylinder and porting it, ~$225 for a Hot Rods +4mm adds pretty great bang for the buck IMO. You pick up about the same displacement gain by adding a +4 as you do going from a 330-350. 78x72mm = 344cc and 78x76mm = 363cc. That's a pretty cheap way to pick up additional power, not to mention the slightly broader power curve. But I hear what you're saying about trying to do it as cheap as you can.
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Or go trx7 esr 100 port with 4 mil crank when you purchase it now. Down the line you can have someone do some port changes if you like but for now dollar for dollar you get the backbone of the engine that you want for the same that you plan on spending right now. They will bore your bare case for free this way too so thats another 100ish.
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38mm will be fine depending on what kind of riding you do. I use a 38mm on my 350 Sphynx for XC riding and it does great
A 40mm will feed your engine better at high RPM, but you'll lose some bottom-end throttle response.
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I would just rebuild your 330 if staying with a standard stroke crank. You aren't going to see enough gain going to a 78 mm bore and at 78 mm with either a new ESR cylinder or old Pro-X there isn't much material left around the water jackets and the 76 mm bore is safer to me for reliability. I would do a 344 cc 76 mm bore 76 mm stroke Esr or pro x
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If you're buying a new cylinder and porting it, ~$225 for a Hot Rods +4mm adds pretty great bang for the buck IMO. You pick up about the same displacement gain by adding a +4 as you do going from a 330-350. 78x72mm = 344cc and 78x76mm = 363cc. That's a pretty cheap way to pick up additional power, not to mention the slightly broader power curve. But I hear what you're saying about trying to do it as cheap as you can.
I did some research yesterday and I think I found a buyer for my current pipe,cylinder and carb so I'm looking into the ESR
"4 stroke killer kit". So I might end up just having Eddie do that with the 4 mill 350 and him doing a nice port..... Is your 350 reliable or would I be safer going with a 330 plus all the other goodies of it's reliable I'll def go with the 350 because it's only an additional $100 over the 330.... I'm ust looking for some opinions from guys that have had similar setups... It will mostly be a XC bike that gets ridden only few times a year but we also hit the dunes once a year and that's really where I have my fun with her!
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I just built my 363 stroker last year,mx setup. While the more you modify anything the less reliability you will have, they are still very reliable. Tbone and Burn363 both do XC racing with theirs. I race mine mx and Burns used to as well. The motors are very strong and they will hold up just fine for you. Since there isn't much cost difference, go for the 363 set up. I love mine. Like tbone said, the 38mm is plenty for XC racing. You don't need the 40mm. The bottom end will be more responsive with the 38.
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I did some research yesterday and I think I found a buyer for my current pipe, cylinder and carb so I'm looking into the ESR
"4 stroke killer kit". So I might end up just having Eddie do that with the 4 mill 350 and him doing a nice port..... Is your 350 reliable or would I be safer going with a 330 plus all the other goodies of it's reliable I'll def go with the 350 because it's only an additional $100 over the 330.... I'm just looking for some opinions from guys that have had similar setups... It will mostly be a XC bike that gets ridden only few times a year but we also hit the dunes once a year and that's really where I have my fun with her!
I never had any issues with that motor. Select a good motor builder and you shouldn't have issues. You definitely get a lot of stuff for the price - link for reference: http://www.eddie-sanders-racing.com/product_p/stage%203%204%20stroke%20killer.htm (http://www.eddie-sanders-racing.com/product_p/stage%203%204%20stroke%20killer.htm)
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You guys have any Mods done to those 4 mill cranks or just install them straight out the box?
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Go for it grande. The esr cyl at 350 is fine and that is proven by it also being used by more builders today then ever before.
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You guys have any Mods done to those 4 mill cranks or just install them straight out the box?
No mods for mine, running straight out of the box.
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Cool well that ks for all the input from all you guys! That's why I love this forum..... I think I. Just going to have Eddie do the port work for me..... I can't wait to get this bad boy
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You guys have any Mods done to those 4 mill cranks or just install them straight out the box?
You could weld the tins and crank pin for pretty cheap.. I do that to all my cranks.
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imho if you already have 330, I would spend money either on the setup you have, or upgrade to a cp cylinder. IMO there isn't enough of a difference between the 330 & 350 to justify spending the money. However, if you can sell your current stuff and upgrade at a low cost, go for it.
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imho if you already have 330, I would spend money either on the setup you have, or upgrade to a cp cylinder. IMO there isn't enough of a difference between the 330 & 350 to justify spending the money. However, if you can sell your current stuff and upgrade at a low cost, go for it.
Agreed but going to a CP cylinder will be more than 2x that of an ESR cylinder. And he is considering going from a 330 to 370 - which would be a decent power gain on a budget.
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Agreed but going to a CP cylinder will be more than 2x that of an ESR cylinder. And he is considering going from a 330 to 370 - which would be a decent power gain on a budget.
True, if you can do it on the cheap, probably worth it. It is just imo that there isn't enough of a gain there to justify it, say if your buying a cylinder new, which gets you in the cost range to consider a cp cylinder.
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I would stay with the 330 or jump to a sphinx (cp).
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What would be an advantage going with a cp cylinder over an ESR?
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What would be an advantage going with a cp cylinder over an ESR?
You should check out Arlan's YouTube channel. You'll learn a ton from watching those
https://www.youtube.com/user/LEDPerformance/videos
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I went from an ESR 330 trx9 port to an ESR 363 BHP (bubba ramsey) and there is a very noticeable difference between the two. The 363 just has way more trq than my old 330. Definitely worth it to me.
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:hyp:(http://i1310.photobucket.com/albums/s659/cynnsam/20151017_165433_zpslslxz8fg.jpg) (http://s1310.photobucket.com/user/cynnsam/media/20151017_165433_zpslslxz8fg.jpg.html) I can't wait to try the 363 BHP did for me. Just need a pipe
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:hyp:(http://i1310.photobucket.com/albums/s659/cynnsam/20151017_165433_zpslslxz8fg.jpg) (http://s1310.photobucket.com/user/cynnsam/media/20151017_165433_zpslslxz8fg.jpg.html) I can't wait to try the 363 BHP did for me. Just need a pipe
Oh man that motor is sooo clean
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I have had the esr 330 and 350, had Eddie do the extra trx 9 porting and it was one quad length difference against the same quads.
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:hyp:(http://i1310.photobucket.com/albums/s659/cynnsam/20151017_165433_zpslslxz8fg.jpg) (http://s1310.photobucket.com/user/cynnsam/media/20151017_165433_zpslslxz8fg.jpg.html) I can't wait to try the 363 BHP did for me. Just need a pipe
Bubba does great work, that thing will be a best.
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I have had the esr 330 and 350, had Eddie do the extra trx 9 porting and it was one quad length difference against the same quads.
How does that set up compare to your sphinx?
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Well I havnt had a chance to speak with Eddie his mailbox is full... I did speak with Arlan today, he's a pretty cool guy and sounds very knowledgable! I'm thinking his motor work is a little out of my price range right now, I'm sure it's worth it but I can't swing 4k on a toy that gets riden Maybe 5 times a year. I'm going to call around to a few other places and keep trying back with Eddie.. I'll let you guys know what I end up with
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How does that set up compare to your sphinx?
I'd say the the hybrid Sphinx is about two quad lengths faster the my 350. But this in straight line drags or the big cinder hills. The crap Sphinx I bought before yours was about the same as the 350.
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I'd say the the hybrid Sphinx is about two quad lengths faster the my 350. But this in straight line drags or the big cinder hills. The crap Sphinx I bought before yours was about the same as the 350.
So happy I didn't buy that sphinx from ya, lol
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I used to have a Esr 330 +4 stroke few years ago and now have a sphinx 363 and its a night and day difference in power from top to bottom. Both being mid-top ports. I liked my 330 stroker but in love with the noticeable difference of the sphinx. I say save up for a few months and do it right the first time. Its an occasional ride but you want it to put the biggest smile on your face as possible without breaking the bank. Imo the extra funds for a sphinx 363 is well worth it. Just make sure you go with a known builder.
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So happy I didn't buy that sphinx from ya, lol
For sure. Sold to a guy in Oklahoma. The second motor he sent was ok but the first broke every time I ran it. Dudes a pos, banned me for life a saying what happened.
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I've decided I'm going to send my current 330 to bubba Ramsey for a port job, cut a new dome, bore and fit new piston. Then I'm going to start gathering some parts for a new build for next year that way I'm not so rushed and end up getting something I'm not sure of... I'm going to try and get the new ESR cases new set of gears Yukon or something similar and I'm going to go with a 350 and 4 mil crank and send it out somewhere.
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I've decided I'm going to send my current 330 to bubba Ramsey for a port job, cut a new dome, bore and fit new piston. Then I'm going to start gathering some parts for a new build for next year that way I'm not so rushed and end up getting something I'm not sure of... I'm going to try and get the new ESR cases new set of gears Yukon or something similar and I'm going to go with a 350 and 4 mil crank and send it out somewhere.
That sounds like a great plan to me. Bubba ports some mean motors
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You better get a hold of Bubba and get on the list. He is busy all the time. Especially with tax refunds, he will be booked for months.
Sent from my KFFOWI using Tapatalk
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You better get a hold of Bubba and get on the list. He is busy all the time. Especially with tax refunds, he will be booked for months.
Sent from my KFFOWI using Tapatalk
I spoke with him yesterday and I am on the list he's thinking it will be back in my hands mid March. That will give me 2-3 weeks to get her broke in
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This is a little bit of a slower time for Pete at hybrid. He just got mine done in 2 weeks. It might be worth your time to give him a call. He is a great guy to deal with.
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I decided on building the 363 amd Pete @ Hybrid is building the whole thing.. I was wondering what kind of gearing you all were running? I had 13/38 on my 330 and it seemed pretty nice but figured with the new motor maybe I'd change it up? Also how many of you guys with the 350 and 363 are running stock transmissions? Any problems with them?
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I decided on building the 363 amd Pete @ Hybrid is building the whole thing.. I was wondering what kind of gearing you all were running? I had 13/38 on my 330 and it seemed pretty nice but figured with the new motor maybe I'd change it up? Also how many of you guys with the 350 and 363 are running stock transmissions? Any problems with them?
Seems like I ran a 14/38 with a 22" 8 paddle hauler, and I also ran a stock cyroed transmission without any issues well I had the setup.
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I decided on building the 363 amd Pete @ Hybrid is building the whole thing.. I was wondering what kind of gearing you all were running? I had 13/38 on my 330 and it seemed pretty nice but figured with the new motor maybe I'd change it up? Also how many of you guys with the 350 and 363 are running stock transmissions? Any problems with them?
How much do you weigh and what tires are you running? I liked 13-39 on a 343 with 71+ R/O 22x11x8 SLS 10 paddle Extremes weighing 210 or so.
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How much do you weigh and what tires are you running? I liked 13-39 on a 343 with 71+ R/O 22x11x8 SLS 10 paddle Extremes weighing 210 or so.
With my gear on I am 170-175 and in the dirt I ride gncc holeshots 20x10-9. And in the sand I ride skat trek haulers 20x10-8 8paddle
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I was wondering what kind of gearing you all were running? Also how many of you guys with the 350 and 363 are running stock transmissions? Any problems with them?
Running 14/38 with stock tranny. So far so good.