Silvia Club of NSW

Why drive when you can drift?
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PostPosted: Sun Mar 13, 2005 10:30 pm 
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There's nothing physically stopping you from putting two turbos on the engine. It just won't be very tractable or efficient.

A lot of the guys here work on their own and other peoples' cars, so while you might have "seen" something chances are these guys have "done" a lot more.


I've seen a 1.5L engine pump out 1200hp at 3bar, too. Of course, an 80's F1 engine won't make for a very tractable drive but, hey, evidently its not a concern of yours.

And most of the record holding drag cars have single turbos only. Any cars that came out with twins from the factory (RX-7s, GT-R's, and Supras come to mind) tend to get single turbo conversions as well at the pointy end of the scale.

The guys here have assumed that you want a streetable motor for a daily driver, and given you advice to that effect. If money's no object and you want to make a big, fuck-off drag machine then you'd be better off getting a V8 Commodore with a live rear axle, and (to be different) run twin superchargers on it.

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PostPosted: Mon Mar 14, 2005 7:37 am 
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Quad T88
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Car: S13 silvia, J31 maxima
whats a VR engine??
Sorry I had too :wink:

Anyhows if you want this nissan engine and twin turbos go buy a GTR. The best drivability without compromise, If you want 300kw its a proven thing in japan, that it can be done realativly easily.
Id personally be dropping the whole twin turbo four thing. Nobody in there right mind would bother with the intricate piping and manifold designs like fergo's said fours just don't have the pulsations to utilise the twins, even with a perfectly designed manifold. A big single is a much better option remembering if you want 300Kw it won't be nice to drive everyday. My SR is a pig to drive everyday I hate it.

Would it possible to link to that DETT CA18?
I have never actually heard or seen it which is very rare as Id imaging its a well known jap car. Being an ex-CA nut i would have assumed id known about it.
Thanks.

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PostPosted: Mon Mar 14, 2005 5:05 pm 
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XTINKT wrote:
aiite... first of all... fergo308... ur dead wrong... i seen CA18 with dual t-35 and t-40... running low 9's, which was my inspiration...and don't call me a wanker...period... money is not an issue... RSK11N, sorry mate i dun like ferrari's, my dad owned one... basically i want to keep the engine within nissan builds... RB, VR, SR, CA, KA... etc. guys stop mocking me because i dun know shit... please...


if anyone is 'dead wrong' here,it'd be you my friend. you clearly know sod all about engines and are certainly not going about it the right way of you want people to help you achieve your goal.
I suggest you just go to a workshop and open your wallet because I for one am washing my hands of you,and I'm sure the few other guys on here who have a bit of knowledge and practical experience (unlike yourself) will be doing the same shortly.
I work in the trade for my living,and have done so for the better part of a decade now. I know my way around an engine bay,and I know what works and what doesn't. from now on,it's pay up first if you want my help.


Justin...

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PostPosted: Mon Mar 14, 2005 6:07 pm 
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id be listening to fergo and the guys here. they DO know what they are talking about.

if you want 300rwkw, stick with an SR20. with a massive rebuild, they can do it! only if its done properly however

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PostPosted: Mon Mar 14, 2005 6:30 pm 
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Location: Under the bonnet somewhere
Car: S13 silvia, J31 maxima
If you want serious advise on building a good steetable car and are open to discussion about it then this is the place, if you want to dream and bullshit on about how good twin turbo engines are then try this link.
http://www.nissansilvia.com/

Im not in anyway having a go at you so don't take it that way, im simply saying you asked a question and we have tried to give you some feed back and sugestions, however I do think you should talk to the shop who would be buiding your car as they could not possibly be as wrong as us.

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PostPosted: Mon Mar 14, 2005 8:11 pm 
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perfect place to start..
they can be very helpful with info :lol:


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PostPosted: Tue Mar 15, 2005 1:35 pm 
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aiite...sorry guys...

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PostPosted: Tue Mar 15, 2005 1:46 pm 
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As people have said, 2 cylinders per turbo isn't enough firing pulses in a 4 stroke to get them to spool up, if you're running two same-sized turbos.

If you're building a dedicated drag motor, where the engine is going to live in the top part of its rev range and generate enough exhaust, then maybe it'll work. But, even then, you'll see better numbers from a large single turbo kit.

If you want sequentials, its going to be one hell of a custom job as there are only 1-2 SR20 twin turbo kit manufacturers out there, and they only made a handful each (which are installed on show cars).

The plumbing required on a sequential twin-turbo system is a big task, and that's before you even try getting the engine management to operate the exhaust gas flow between the two turbos.


Undoubtedly your 9 second twin turbo (with 2 different sized turbos) was a custom-built drag machine. Probably owned and built by a specialist workshop who has the knowhow to keep the thing running and sort out various niggling issues that only come up once you try and drive the car.


If you're after a street car, though, you'd best sticking to a single turbo, or buying an engine that comes with twin turbos from the factory and mounting that.

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Tips for being fooli sik:

Go chrome or go home
Sneezin's Pleasin'
Da flutta is bred and butta
NOS is boss
Try to be different, just like everyone else
No boost? Ya just loost


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