i was just cuious is there any possible way to have a rx8 twin turbo instead of sinle just like the rx7? I know heat would be a huge problem but does any body have this setup or has thought about it?

 

Hmmmmmm never thought about that!!!

Can you be more specific in your plans as you'll be the first to do this!!!

 

For what purpose would you need two turbos?

 

MOE POWER!!!

 

Moe power is moe betta!

 

Moe turbos does not neccessarily mean moe powa!

For a street car, I can't think of a reason why you'd want to do this unless you like added cost and complexity.

 

The RX-7 came with twin turbos. When people want more power, they tended to go with a single larger turbo...

Sequential twin turbos allow you to have a smaller turbo that spools faster, then a larger turbo once you're already going...

 

That's not how it worked. They were 2 equally sized turbos.

There is a way to make it work and Opel is doing it on a diesel engine but it's done in a sort of series setup that is really ingenious. Replicating this on a street car would be an interesting task.

 

Yes, there's more than one way to setup twin turbos. I never meant to imply it was done that way on the 7.

Setting them up in sequence would be the only way I can see twins helping this guy.

 

why not a triple turbo 13G? Then you could go to Bonneville. Or did somebody already do that?

 

Change the title!

 

for the price of setting up a twin, or sequential turbo set-up , wouldn't it be better to go with one of the new variable vane turbo's I've been hearing about?

 

I saw a $8,000 price tag on a two speed turbo... if the VTT costs are anywhere close to that, it's not going to be worthwhile for our application.

 

BorgWarner just got a VGT for the porsche going, but the exhaust temps it handles arent high enough for the rx-8. It's only handling like 1100 degrees.

VGT would be the way to go. Sequentials is just a messy alternative.

 

you dont want twins

 

With ball bearing turbos these days you can get large sized turbos that give decent low end response, so there really isn't a great reason to do a twin turbo setup. Not to mention the fact the Renesis doesn't have 2 banks of cylinders like a 350Z, so putting a turbo for each bank makes sense for them, but not us.

 

i thought of twin turbo's for for the 8 but like someone said, the new turbos coming out don't give as much lag as the older generations, turbo spools quicker. Maybe one day, a twin turbo would be made but we're already having trouble with a single turbo as is.

but yeah, i agree with moos when he said change the title! i was expecting a twin turbo 8 when i got here.

twin turbos has always been a favorite on my part, i was planning on getting an fd and just putting on some 99spec turbos on it or if im lucky, get a hook up on a spirit r engine just for rarity. thought single turbo is the way to get much better top end power and better overall power, twins have always been good on the track because turbo lag isnt much of a problem at lower rpms. im just ranting now.... Go Twin Turbos! If they came out with one for the 8, ill probably get it.. hahaha

 

There can be some efficiency advantages to twins. For example, a pair of GT20's operating at a PR of 2 and flowing 20#/min is about 79% efficient where as a GT35 has fallen off to the high 60's for the same flow.

 

Syndicate Racing in San Diego can do Sequencial Twin setups that look cherry, the only thing is it costs as much as a used RX-8 (about 20K)

 

Get a GT28 for the smaller, faster spooling turbo. Also route the piping to hit the GT42R, second larger turbo. The small turbo spooling quickly should get the GT42R up to its potential in no time.

I dont know what im talking about, but it sounds logical.

 

Damn I got all excited when I saw this thread. I say someone go build one and see what happens. I suppose you could pressurize each rotor separately with two smaller turbos. Run the exhaust manifold into a y pipe and spin them both in parallel...Patent pending!!

 

HAHA, god i hate this thread, such a tease

 

^Yup this was talked about when I first singed up on this msg board some time back and I think RG said the same thing lol

 

no thanks, I'm holding out for the quad turbo

 

Def. better with a single turbo