Making the type four rev higher Options

[Trekkor]

I have a VW Bug race car with a type four motor.

I would like it to safely rev up to 6500-7000 rpms.

What is needed to accomplish this?

thanks

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KT

[DBCooper]

You said "we turned 322 3 mile laps in our 2012 24 hour race", which is an average of about 40 miles an hour. That's not real fast, so did you spend time in the pits? How much? A 40 mph average speed won't stress your engine, so I guess the real question is what's your real average speed, when racing, the speed you'd need to maintain for 24 hours?

Reason for the T1 suggestion was cost. All the performance parts you need are cheap in a T1, while the same T4 parts are expensive. The question about aircooled fours in endurance racing was because you're doing something really rare and difficult, so it's really cool. But it's so cool exactly because it's so hard. And since it's hard to make a T4 live that long it seems that your priority is probably longevity before power or RPM's. Or no? And IF that's the case (lots of "ifs" here) then that suggestion to go big and mild might be wiser than smaller and stressed.

Did you chop up the back of the car, or was it converted to upright cooling? If so what are you using? Is there a thread somewhere?

[worn]

Reason for the T1 suggestion was cost. All the performance parts you need are cheap in a T1, while the same T4 parts are expensive. The question about aircooled fours in endurance racing was because you're doing something really rare and difficult, so it's really cool. But it's so cool exactly because it's so hard. And since it's hard to make a T4 live that long it seems that your priority is probably longevity before power or RPM's.

(IMG:style_emoticons/default/agree.gif)
My short experience, with a ton of explorative reading, has led me to the conclusion that the 914 was designed for a six and given a 4. And that 4 was pushed to and then past its design limitations. To make power you end up heating the heads which had already been increased in size progressively. By the time they got to the 2.0, which was born of necessity and I am glad that they did, they had reached a point at which they had to move the red line on the temp gauge and sell a car where the oil pressure light came on at about 3 psi, with no stock gauge! They also sold them in general to the same kinds of people who buy Porsches now. If there were problems they would pay the dealer.

Not a rant about the 914, because it is a thoroughbred chassis. I just think that if you want the power that the chassis deserves you are going to have heat or you are going to have a six (and heat). I drove my 914-4 to work today and loved every meter travelled.

What I think I am saying is that for power, I am not sure that the type 4 engine is the best example out there. Maybe if you have to have air-cooled, but even then I suspect there is more capacity in the Type 1. What is the icon for having said the wrong thing?