[tefu]

Just wondering why people do conversion from twin T to a single T?

I like the idea of the sequential twin turbo... one for low rpm, the other is for high rpm.

in FD, both turbos have the same size? or one is smaller than the other? smaller for low rpm and big one for the high rpm

[51CAZ]

To put it simply....for big power your never gonna get it with the stock twins.

You can upgrade the twins to larger guys and do the supporting mods around them to make much bigger power than standard, but if u really want that kick and take ur rotary out to 9 grand and feel the power band all the way out there.....its big single time.

The other reason people do it, is when sh*t goes wrong with their stock twins....its time to do something, may as well go for the big power and pull everydown down at the same time.

As far as turbo sizes go they're both small but do have a kick in at a higher rpm...so first turbo is about 2500-4500 then the second turbo kicks in after around 1 second of tiny lag and takes you the rest of the way up...factory limiter/buzzer is at around 7200

(thats for the factory twins)

Dom will have a better idea on the power potential of aftermarket twins vs big single....I'm sure he'll show up in the thread soon enough.

[nvmyre]

twins are prone to failure also different spec models came with different turbos also as far as with the twin setups series 6 and 7 fd's they run a very complex system of vacum hoses and vales and actuators to correctly control the twins these are very prone to failure or leaking and when this happens its a system that has to be traced properly to be fixed .....this was changed on series 8 to a single vacum control box so it is much easier to maintain..
the twins are one small and one larger for low rpm instant boost and the second one kicks in at 4000rpm to give you your top end pull...
these are fantastic turbo setups ....if you want to stay with the twins there is a few options of upgrading them with great high power results ....
but ultimatly the single is the way to go if you size the turbo correctly to match the performance you want you can get great low down response and excellent hi end power ....

i had a to4z on my car before it made great usable boost by 2000rpm all the way to 8250rpm also made 310rwkw on 10psi now that is great performance
standard twins are good for maybe around the 220rwkw mark id say from memory

[havik7]

nvmyre, on Mar 30 2008, 02:04 PM, said:

twins are prone to failure also different spec models came with different turbos also as far as with the twin setups series 6 and 7 fd's they run a very complex system of vacum hoses and vales and actuators to correctly control the twins these are very prone to failure or leaking and when this happens its a system that has to be traced properly to be fixed .....this was changed on series 8 to a single vacum control box so it is much easier to maintain..
the twins are one small and one larger for low rpm instant boost and the second one kicks in at 4000rpm to give you your top end pull...
these are fantastic turbo setups ....if you want to stay with the twins there is a few options of upgrading them with great high power results ....
but ultimatly the single is the way to go if you size the turbo correctly to match the performance you want you can get great low down response and excellent hi end power ....

i had a to4z on my car before it made great usable boost by 2000rpm all the way to 8250rpm also made 310rwkw on 10psi now that is great performance
standard twins are good for maybe around the 220rwkw mark id say from memory

thats actually sort of power i want to make and if boost is coming on at 2000rpm WTF thats awesome for a 800hp turbo esp at 10psi what A/R if you dont mind .61 A/R ?

[tefu]

but wouldn't the twin setup makes the car very responsive though? low rpm... specially? so it's good for street use?

[nvmyre]

mine was a TO4Z with a 1.15 rear now remember this is on a rotor so the rears will be bigger and as for the twins being good on the street yes they are good for a standard setup but they do not like to be boosted much and you will find you will need more against cars that have had a little work done to them the standard twins run around the 8-10psi mark on the to4z with 10psi i made 310rwkw

[Biggie]

twin set up as dom has mentioned is complex and prone to failure, not to mention not boost friendly, a big single as with Supras and GTRs is simple runs efficiently, and most importnaly produces big power reliably.

Plus a To4z looks damm hot sitting there F off style

[51CAZ]

See told ya dom would be able to help

The twins is great for street use and response, when I go down my upgrade path instead of doing a bigger single I'm going to stick with aftermarket twins because I love how the rotary delivers the power with the twins compared to my sr.

That being said...the t04z is beautiful music to the ears when she spools up, it'd be my option if going single.

[tefu]

51CAZ, on Mar 31 2008, 12:00 PM, said:

See told ya dom would be able to help

The twins is great for street use and response, when I go down my upgrade path instead of doing a bigger single I'm going to stick with aftermarket twins because I love how the rotary delivers the power with the twins compared to my sr.

That being said...the t04z is beautiful music to the ears when she spools up, it'd be my option if going single.

yeah true, lol I love FD RX-7 nearly bought one before I bought my S15, the only thing that stop me was.... the windows have frame on it... LOL ( I was being serious though, don't ask why hhee)

but now I want a FD... thinking of getting that for my second car

Hey Dom, that 10psi.... that's basically nothing hey to the engine, it's like small boost? or isit decent boost for rotary engine?

[nvmyre]

10psi isnt alot really a stock engine will handle 10psi quite easily i run around 17-20 psi in my engine as a normal boost pressure when i drive it
but there is a lot of things to work out with the setup to make sure its complete functioning setup that each component compliments and works well with all the other parts of your setup

[tefu]

that's a crazy output from 10 psi boost from 1.3 lt engine LOL

Thanks dom, btw, 17-20 psi, does it make 576rwkw?

[nvmyre]

lol no worries mate no it makes 423rwkw on 20psi and pump fuel soon after we have finished the new mods we will be giving it 35psi and c16 race fuel should make 576rwkw pretty easily

[havik7]

nvmyre, on Mar 31 2008, 08:48 PM, said:

lol no worries mate no it makes 423rwkw on 20psi and pump fuel soon after we have finished the new mods we will be giving it 35psi and c16 race fuel should make 576rwkw pretty easily

Damn .... how you going to get power to the ground

[nvmyre]

lol dont know i think we will just have to strap it down hard on the dyno
the record is 575rwkw thats why mine says 576rwkw cos i just wanna win ....lol il be happy with 1 kw more

[51CAZ]

nvmyre, on Apr 1 2008, 11:29 AM, said:

lol dont know i think we will just have to strap it down hard on the dyno
the record is 575rwkw thats why mine says 576rwkw cos i just wanna win ....lol il be happy with 1 kw more

nooooooo u want more than just 1kw more

Cant wait to see the results mate.

I hope you'll be posting it up in the members build up sections of this site too

[havik7]

51CAZ, on Apr 1 2008, 02:49 PM, said:

nvmyre, on Apr 1 2008, 11:29 AM, said:

lol dont know i think we will just have to strap it down hard on the dyno
the record is 575rwkw thats why mine says 576rwkw cos i just wanna win ....lol il be happy with 1 kw more

nooooooo u want more than just 1kw more

Cant wait to see the results mate.

I hope you'll be posting it up in the members build up sections of this site too

hahaha the thing would be insane on the road with that power no traction what so ever.....

[nvmyre]

yes well as traction is an issue that is why we are in the process of ordering some new rear rims for the 7 same black work meisters but in a 19x13 instead of the 19x10 i have now should be able to get some 355 under the ass of her hopefully that should help a little ...
going to try to get a very quick street tyred pass

i will be posting the build of my new fd3s we will be starting to build soon this will be a rx7 to make nvmyre look ordinary ...wait and see ..

[karasu]

cant wait to see the new FD,
to make nvmyre look ordinary,its going to be crazy

This post has been edited by karasu: 01 April 2008 - 06:59 PM

[tefu]

355 at rear? OMG.... lol do it..... I love fat tyres...

[Kame86]

nvmyre, on 30 March 2008 - 01:34 PM, said:

twins are prone to failure also different spec models came with different turbos also as far as with the twin setups series 6 and 7 fd's they run a very complex system of vacum hoses and vales and actuators to correctly control the twins these are very prone to failure or leaking and when this happens its a system that has to be traced properly to be fixed .....this was changed on series 8 to a single vacum control box so it is much easier to maintain..
the twins are one small and one larger for low rpm instant boost and the second one kicks in at 4000rpm to give you your top end pull...
these are fantastic turbo setups ....if you want to stay with the twins there is a few options of upgrading them with great high power results ....
but ultimatly the single is the way to go if you size the turbo correctly to match the performance you want you can get great low down response and excellent hi end power ....

i had a to4z on my car before it made great usable boost by 2000rpm all the way to 8250rpm also made 310rwkw on 10psi now that is great performance
standard twins are good for maybe around the 220rwkw mark id say from memory

haiya Dom, my name is Ignace

Im building an FD 2001, I am after 400kw at the rears, Im gonna do the whole lot, engine rebuild with SCR seals.......

but not too keen on anything bigger than extend porting, what u reckon, possible? Jazmac recomended Microtech but heaps of people said PFC, I know u use PFC, anything u could tell me that might turn me around from using PFC?

with bridge port, how much attention are you getting from the cops?

thanks fro your advice in advance, cheers