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Old 07-26-2012, 12:46 AM
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Default rocker ratio

Kaddie shack advised me that along with rebuilding and rejetting my solex kadrons.
If I changed my rocker ratio to 1.5 I would see my torque and power curves raise dramatically.
Even with a lite cam that is close to stock.

Are they blowing smoke or will it really help.
thanks
ps. they have dyno results of a similar engine mod on a stock motor on their web site. If you want to look at them
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Old 07-26-2012, 07:56 AM
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I had ratio rockers in my first car. I think they were 1:1.25 or something like that. Dramatic power increase... well, no, but they do help a little. After all, you're holding the valves open farther than they would be in a stock configuration - the more they're open, the more flow you'll have - to a point. If you did a port and polish job to the heads, then larger ratio rockers start to make more sense.
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Old 07-26-2012, 09:29 PM
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if it would help my top end power I would be happy. That's where I need to gain.
Ya I can cruise 70- 80 mph but I lose some power climbing hills. It's runs about 2600 rpms at 70 mph.
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Old 07-26-2012, 09:37 PM
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You need torque, not horsepower. Beetle engines were never meant to run at highway speeds like we have today. See how the Kadrons are after you get them back and build from there. A good header system will help with low end torque as well. But I'm more worried about the RPM's you're turning. If it's only sitting at 2600 at 70mph, you may have a freeway flier transmission in there and that's why you seem to be losing power on hills. A stock transaxle would be turning anywhere between 3200 and 4000 rpm at 70mph.
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Old 07-26-2012, 10:56 PM
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I have to down shift to maintain speed on a hill then
I'm at 3500 rpm.
At the low end I have plenty of torque. I can spin my 10inch wide tires at the light pretty easy.
I just run out of juice at high end.
I have headers do you remember the pics from earlier posts. They have turbo car mufflers on them, with baffles.

Do you think the baffles are cutting my high end power. I made the baffles to make her a little more quiet. I posted pics of them as well.
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Last edited by delbertinie; 07-26-2012 at 11:07 PM.
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Old 07-26-2012, 11:02 PM
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is it hard on these little motors to run 70 consistently
it runs about 160 to 190 on the highway at 70-75

it gets hotter when i slow down for a few minutes then drops
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Old 07-27-2012, 12:08 AM
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Nope, that rpm range is about right for downshifting. The oil temps are right on the money, if not even a little cool. The reality is the engine is still a basic Beetle 1600. You're simply running out of engine and gear on hills. Been that way for decades. Even a larger displacement engine like a 1835 you'll still be shifting on steeper hills - it's just the nature of the beast.
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Old 07-27-2012, 09:51 AM
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He took a bunch if weight off the flywheel as well would that affect it.
That's the last thing I'll ask about this
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Old 07-27-2012, 01:01 PM
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The lightened flywheel will only affect how quickly the engine gets up to revs. It won't affect performance per se, though you'll have a slightly more difficult time matching revs with your shift points as the engine will unload faster than normal. Had one of them, too

Driving a VW is far different than a modern car with modern drivetrains. Beetles were meant to be basic transportation, not speed demons, and the ruggedness of the engine reflects that. The average torque range is from 2500 to 3200 rpm, and that's where the engine needs to be kept for adequate cooling and "hill climbing". Never allow the engine to "lug" and attempt a steep climb in a high gear - you'll always need to downshift to keep the revs up. Once you get used to it you'll be surprised how spiritedly you can drive even a basic engine. Listen to the engine - it'll tell you what it needs!
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Old 07-27-2012, 06:08 PM
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I've been trying to let this go but I have to add my 2 cents.

If your not happy with the performance when trying to get up a hill just lighten the flywheel and see what happens. You'll be really unhappy then. Sure it will allow the engine to excellerate faster if you lighten it but it also will allow the engine to decelerate faster also. You'll run out of steam going up that hill alot faster and like rick said shifting will be an issue. Alot of write ups on the web, do a search and find out why there is a flywheel there and what its pupose is. Then decide if thats what you want to do.

like rick said back when the car was built the speed limit then was 55mph and it did that very well.

Get the carburation figured out then see how it runs.

Brett
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