phantommaggot

hi

so im in the process of selling my corrado and hunting down a T2 as we speak.

so in prep. for the future id like to know what a person would need to redline a (turbo) car at 9000+ rpms, also how can you tell what a safe redline number is? im asking now so that i can do my research. i like being well informed before i try something. and over the past month or so the concept of the wankel has grown on me.

and please dont think that i would jump in and build on a car with pre existing problems or without any concern for the things it needs to keep stable. my car now is a corrado, so i spend most of my time under the hood replacing vac lines and adding vac caps. but its time for a RWD.

any help, links, so on would be greatly appreciated

cewrx7r1

iTrader: (2)

There is no need to rev a rotary engine that high to make power unless it is not boosted.

To make decent power that high up so that you are not reveing just to be reving, you would have to go beyond the normal street port to bridge port.
But then the engine requires much more attention than porting. It will need extra clearancing of the rotor to all housings and same to the rear main bearing.

Then all rotating parts need to be dynamically balanced.

That is if you want the engine to last long enough. Running higher revs then really needed just wares the engine out faster.

BLUE TII

iTrader: (9)

As stated above, it takes a LOT of machine work, oil mods, clearancing and hardened internals to safely rev a pre-renissis 13B above 8,500RPM. If you pick up the Racing Beat catalogue/tech guide it will provide details on the traditional way of doing the mods for the NA engines that needed to spin that high to make power.

On a turbo car, it would usually be more benificial to spend the money on a better turbo or manifold- though the traditional oil mods can still help longevity.

A new alternative to higher revving rotaries is the Guru 2 piece 3 bearing e-shaft that eliminates the e-shaft flex that neccesitated the earlier modification schemes. Costs a bit though!

You will have to port carefully and chose a big turbo to make power that high RPM- Rice Racings posts will help get you on the right path...

phantommaggot

i was just wondering if it was a good plan. im looking for a t2 and will probably work on the suspension and such first anyways, i figure if it can handle a few more pounds of boost itll be fine. i dont really need all that much power till i figure the car out.

is it alot easier to get a n/a to rev higher? i figured it was somewhere along the lines of port, stationary gears, oil work, fuel, e-shaft, bearings. and so on. a buddy of mine was looking at getting a n/a as they are all over the place around here. but he was asking me how to get power from them without boost ( he drives a talon tsi as of now O_O ).

RandomHero

iTrader: (2)

Its a much better idea to start with how much power you want to make, then decide what kind of port you need to get there, then find out how high it has to spin to utilize the extra efficientcy the port has given you.

grantmac

You can easily make over 400RWHP without spinning over 7,500RPM in a turbo car, why spin higher? All you do with ports that big is loose your drivability.
Grant

RandomHero

iTrader: (2)

^w/stock ports?

grantmac

I'm pretty sure a REW block could, they have very large ports. Also even if you did a SP, it wouldn't have to spin that high to make a large amount of power.
Grant

GUITARJUNKIE28

i made 420+ at 16psi on stock ports before. it was a t78 though.

RandomHero

iTrader: (2)

^was that your high compression setup?

GUITARJUNKIE28

naw, just 9:1 on an fd.