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Unread 04-25-2009, 01:34 PM   #11
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Smile re: 295 head on 350 performance engine rebuild?

Hello All,

@Tonyton:
Don't go over 7000.
Than you need a hardened cranck.
Build in new connectingrods wit bearings in it.
Be sure the oil can get back at the cranckcase, because at these revs you get the risk of pumping the oil in the head, where it can't get back fast enough, cousing lack of oil in the crankase / pump!
My engine has another cranckcaseventilation and bigger oilholes in the head.
Also the housing of the oilfilter is opened wider at the top.
I have 1.95 liter full Synthetic in it and change it every 10 - 15 hours.
Yuor exhaust will be to "small"

@Dirtysouth:
The enginenoise is far better to hear as a untuned V twin......listen to my vids!
We use at least 98 Ron or even 100 when available.
Mine has a compressionratio 1 - 12.9 now after about 100 hours.

Benno
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Unread 04-25-2009, 01:39 PM   #12
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Default re: 295 head on 350 performance engine rebuild?

You do need 93 or better octane for this mod. And no offense taken here. I go overboard when I do things!! Jon is VERY knowledgable with the GO's! Good Luck!
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Unread 04-25-2009, 01:57 PM   #13
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Default re: 295 head on 350 performance engine rebuild?

I appreciate that. I understand what youre saying. You vented from the the crankcase to the head, and open up the drain holes from the head back to the crank. This allows more oil flow back to the crank.
The exhaust ports need to be opened up and a header to fit the new size port.
I definitely don' t have funds for a hardened crank.
I have a 1 litre remote oil cooler.
What RPM would you consider safe without the hardened crank?? No liability on your part, I won't blame you if I blow it up!!
Thank you for speaking up-That would have been a very costly mess!!!!!!!!!
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Unread 04-25-2009, 02:52 PM   #14
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Default re: 295 head on 350 performance engine rebuild?

Hello Tonyton,

Max 7000 will go, if your not driving this revs continiusly.
Above 7 the risk of breaking is to high.
Breaking is caused by unbalance in the cranck AND the pully.

Another breaking possibylity are the aluminium connectingrods.
My first aircooled with 25 HP did 300 hours before breaking one of them.
Now i change them everytime i open the engine.
Steelrods will cost about 500,-- so its cheaper to change the aluminium ones every now and then.
Till 7 they are not the biggest problem.....
I also shaved the fanblades because of the higher revs....
One last question, does your ignitionsystem take thes revs?

If you are doing this job, look well after the oil and oilfilter for metalparts.
If they are there, open the engine before you have to.......

An oilcooler is good on your engine because of the extra heat.

But keep in mind tuning say extra revs costs extra $. for repairs.
Another thing to remember is, that my kartengine is much more abused as yours.
(Always revs above 5000 and fast revving up and down, more curves with high speed etc.)

See a pic of an engine with oilcooler in my album.
Its build by a wellknown racecar tuning firm named Schrick.

Benno
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Unread 04-25-2009, 04:42 PM   #15
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Default re: 295 head on 350 performance engine rebuild?

I am purchasing an MSD ignition. It's an aftermarket ignition designed specifically for two cylinder race apps. (harleys, Buells,etc..) It's a kit with all the hardware for the robin motor. I think I'll try to keep this @ below 6500rpm to prevent so much risk and $$.

You all are VERY serious about those golf carts!! Oh,....... go-karts!
I need SPONSORS!! Thats how I can get the $ and........... Anyone volunteer??
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Unread 04-26-2009, 07:31 AM   #16
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Default re: 295 head on 350 performance engine rebuild?

will there be point in this head build were you will post pictures of the components that make up this 800.00 head?
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Unread 04-26-2009, 08:09 AM   #17
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Default re: 295 head on 350 performance engine rebuild?

these are some repair pictures, but i'm not sure what the goal was? ..i sure hope that nobody thinks that this is the proper way to repair there 295/350 ez go rockers


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Unread 04-26-2009, 10:24 AM   #18
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Default re: 295 head on 350 performance engine rebuild?

Quote:
Originally Posted by TRAP4KAT View Post
Ruredy, i always valued your knowledge, and would love to hear how you would do it. no offense to anyone else, as everyones opinion has been valuable to me and is alway appreciated.
I would stick a 295 head on it, use a 350 head gasket and carb and be done with it. I don't see much point in going any farther with the engine unless your going to get a different ignition system so it will rev higher. A better grade of gas is a good idea but I don't think you'll need race gas. There have been many many engines run on high octane pump gas that are at the same level of compression as what you'll end up with. flat top and dish pistons are better suited to running higher compression than dome or pop-up piston. you'll get better flame propagation in the cylinders with dish or flat tops pistons, this generally eliminates the need for race gas.
The mod should be good for an extra 5+ ponies so it's a great bang for the buck, Not like $200 for a cam that hardly helps or a header that cost that much or more and won't do jack. It doesn't matter what mod you do, your cart isn't going any faster unless you change the ignition system and defeat the rev limiter. (or a gear change) to me it's all about going faster, only then do you need more power.

I'm pretty sure the pics of Tony grinding on his messed up rockers were meant as a joke, that's why he posted them in the general BS section
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Unread 04-26-2009, 10:30 AM   #19
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Default re: 295 head on 350 performance engine rebuild?

PIZZAMAKER
Glad you are sooo cheerful today!!!!!!!!Who pee'd in your Wheaties??
First Pictures: If I feel like it!
Second: I don't have to answer to your crap or justify my actions to you. ALL you have is very negative comments and I would rather not hear from you, deal with you or otherwise. Good DAY!!
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Unread 04-26-2009, 11:27 AM   #20
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Default re: 295 head on 350 performance engine rebuild?

Quote:
Originally Posted by tonyton View Post
PIZZAMAKER
Glad you are sooo cheerful today!!!!!!!!Who pee'd in your Wheaties??
First Pictures: If I feel like it!
Second: I don't have to answer to your crap or justify my actions to you. ALL you have is very negative comments and I would rather not hear from you, deal with you or otherwise. Good DAY!!

Yeah the pizzamaker is something else, he told me i didn't know my a$$ from a hole in the ground other than putting stuffed animals on carts......
The key is zip ties
He's been mad at me ever since this little incident......
Hot-Rodding a stocker.
Maybe he's miffed about your participation in dve8529's thread
I've tried to be nice since we let him come back but it's hard at times. he likes to attack people, was really bad about it over at bu. not really sure why that is, I guess it makes him feel big.
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