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RPM Redline, Shift Points ETC.
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CNSRANCH
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Joined: March 15, 2017
Posts: 126
Location: United States
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PostPosted: Thu May 11, 2017 7:04 pm    Post subject: RPM Redline, Shift Points ETC. Reply with quote

Getting to know my new buggy. Originally a 1600, rebuilt 1,200 miles ago - now (at least the previous owner says) 1914.
Dual carbs, oil cooler, filter........
All I know is this thing runs like a scalded cat - it is fassst.
Had a question about oil pressure - I think I've cleared the gauge issue, but I'm still concerned about it running high.
I had a 69 1600 that ran oil pressure around 20-25 pounds. This one idles at around 35-40#, and goes up in the 60's revving the engine.
That's bad, right?
Also, what should be the red line re rpm's with an engine like this? I quit at 5,000 rpm and 85 mph.
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slalombuggy
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Joined: July 17, 2010
Posts: 9146
Location: Canada
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PostPosted: Thu May 11, 2017 8:24 pm    Post subject: Re: RPM Redline, Shift Points ETC. Reply with quote

Engine oil pressure is usually around 10psi at idle and then 10 psi per 1000rpm ie. 30psi at 3000 rpm IT would help to know the oil pump size and what weight of oil is in the motor.

As far as rpm for that you need to know if the engine is balanced and what the heads (valves, port work, springs) and cam are in it. But even an engine assembled with basically factory balanced parts should be good for 5000 rpm.

brad
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vwracerdave
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Joined: November 11, 2004
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Location: Deep in the 405
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PostPosted: Fri May 12, 2017 3:25 pm    Post subject: Re: RPM Redline, Shift Points ETC. Reply with quote

With what I see looking at the pictures you posted in your gallery, I'm guessing it's all done making power by 5000 RPM so I see no reason to turn it any higher.
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1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK
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wythac
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Joined: August 02, 2004
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PostPosted: Sat May 13, 2017 8:15 pm    Post subject: Re: RPM Redline, Shift Points ETC. Reply with quote

Look up a pic of a stock VW speedo. It shows the factory recommended shift points (using stock gearing) in red on the dial. When I went from stock to higher performance powerplants I found I could exceed those values by 25-30%.

I recall 1st to 2nd at 15, 2nd to 3rd around 30 and third to fourth around 45.
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