high boost @ low rpm torque monster setup

[TitaniumTT]

Originally Posted by hades

why not look at variable geometry turbos?

because the vgt can't handle the egts of a rotary. Get your egts down and you're good to go. I plan on ditching the panties and making it work though.

Twins are great, love 'em, but they suck to work aaround, work properly and they don't last long at all above 15psi.... but I hit boost cut <3k easily

[RETed]

I still don't understand what the hangup is for more boost...

It's FLOW that's going to give you the torque / power.

So here's the dilemma...
BIG turbos obviously give you lots of flow, but they don't spin up well at lower RPM's - this isn't your answer, unless you get that big turbo to spin down low.
NOS?
You can try all the little tricks to get them to spin earlier, but I bet it's still not enough...
We're talking divided set-up's with high velocity runners for your turbo exhaust manifold trying to take advantage of pulse tuning, etc.
Pain in the ass and big headache to figure it out...

How about we run individual turbos per rotor?
This takes advantage of the strong exhaust gas pulse and keeps everything divided.
It's an extrapolation of the above, but it takes it one step further from (big) single turbo set-up's.
I can only remember only a handful of people who have tried individual twins, but I believe they have gotten very promising results...


-Ted

[RICE RACING]

................

[hades]

Originally Posted by TitaniumTT

because the vgt can't handle the egts of a rotary. Get your egts down and you're good to go. I plan on ditching the panties and making it work though.

Twins are great, love 'em, but they suck to work aaround, work properly and they don't last long at all above 15psi.... but I hit boost cut <3k easily

EGT's are going up to lower emissions. surely there is a factory turbo that can be tried out.

[RICE RACING]

I run a T04 turbo std stock Mazda porting and have 22psi at 4400rpm, but more to the point massive power at even these low revs, its so much that when the turbo comes on boost and power is there, it literally compresses the Ohlins race suspension and the nose lifts into the sky

It is stupid really, it is so violent coming onto power in 2nd gear that it will throw the car off the road and even F1 spec Race Logic traction control has trouble taming it (and that is in a FD Chassis with big rear tires of soft compound hot tires~!) and over 50% weight over the rear tires.

You can have too much low end mid range power. Having said all that I would not swap it for the world and that is someone who makes excellent street ports and loves the top end power they produce.

You have to be careful when you get into big power ranges (Ferrari F40 acceleration specs) cause if you use too small a turbo combination your EGT goes through the roof! and it is NOT reliable on the engine nor the turbine. I have all the details listed in my ride thread build up. I dont list EVERY specification but I give away more than anyone else when it comes to these topics

Water Injection is mandatory if you want reliability and power combined.