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?