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sr20 converted
http://www.ozdat.com.au/forum/viewtopic.php?t=17791		 Page 1 of 2
Author:  fragard-303 [ Fri May 29, 2009 11:41 pm ]
Post subject:  sr20 converted
hey guys I was wondering if anyone ever tried putting twin webbers
on an sr20. i have never herd of any and would love to see one done
and how well it goes.
Author:  Rat Dat [ Sat May 30, 2009 2:16 pm ]
Post subject:  Re: sr20 converted
There's a guy here in Ballarat who has put carbies on an LS1 5.7litre V8... i just dont get it... why put an inferior means of petrol delivery on a hi-tech motor? I have heard of someone putting webbers on an SR20, but again, i just dont get it....
Author:  Boyracer [ Sat May 30, 2009 6:53 pm ]
Post subject:  Re: sr20 converted
Why - Because you can... or don't want to go to the cost of computers, efi fuel pumps and regulators and all that cr@p. On a newer car I owuldn't think it'd amke a lot of sense.

If you can find a manifold to fit the webbers you'll be laughing, piece of cake... but what are you going to do for spark ? The SR20 doesn't come with a dizzy does it ?
Author:  spandex [ Sat May 30, 2009 6:55 pm ]
Post subject:  Re: sr20 converted
Boyracer wrote:
Why - Because you can... or don't want to go to the cost of computers, efi fuel pumps and regulators and all that cr@p. On a newer car I owuldn't think it'd amke a lot of sense.

If you can find a manifold to fit the webbers you'll be laughing, piece of cake... but what are you going to do for spark ? The SR20 doesn't come with a dizzy does it ?
Why you need a dizzy for? and yes they do come dizzy,

Webbers would work from on a NA, a NA is dizzy anyways, DET has a CAS, but it will work with either
Author:  fragard-303 [ Sun May 31, 2009 12:48 am ]
Post subject:  Re: sr20 converted
haha dont need a dizzy .... i found a DIY job that might do the trick
http://www.jaycar.com.au/productView.as ... rm=KEYWORD
and if you make a face plate that bolts to the head and one to the carbie/s i recon it may work
Author:  bob260 [ Sun May 31, 2009 12:56 am ]
Post subject:  Re: sr20 converted
I have never really completely understood the 'because you can' justification. I *can* jam a broomstick in my backside and stick pictures on the internet - I don't because that would be an inferior option to *not* doing it.

The cost justification doesn't hold water either. By the time you have reconditioned two webers and found/manufactured a manifold you are looking at way more money than the factory fuel delivery.
Author:  24TKman [ Sun May 31, 2009 8:36 am ]
Post subject:  Re: sr20 converted
twin weber SR20!!!! no rev limiter.... sounds like fun
Author:  Rat Dat [ Sun May 31, 2009 12:24 pm ]
Post subject:  Re: sr20 converted
To me, it's like putting a wooden wheel from a horse and cart on a drift car.
Author:  spandex [ Sun May 31, 2009 1:02 pm ]
Post subject:  Re: sr20 converted
Carbyturbedbluelird wrote:
twin weber SR20!!!! no rev limiter.... sounds like fun
It limited when it snaps at 9k from a rocker arm smashing to bits
Author:  datdrift [ Sun May 31, 2009 3:42 pm ]
Post subject:  Re: sr20 converted
couple things to consider if you bolted the carbies to a face plate and straight to the head is will the carbies get to hot
secondly is it goin to have enough length between carbies and valves for the flow to pulsate properly

either get a manifold or just go efi
Author:  fragard-303 [ Sun May 31, 2009 10:23 pm ]
Post subject:  Re: sr20 converted
well what i have found is to go with efi you need a money tree with the carbies you can tune
them from home instead of going to a dyno $$$$$
an with the carbies being bolted is not an issue i just need to design a manifold
Author:  bob260 [ Sun May 31, 2009 10:38 pm ]
Post subject:  Re: sr20 converted
Why do you need tuning? Run the factory computer and loom, the factory already did the hard work,
Author:  fragard-303 [ Sun May 31, 2009 10:40 pm ]
Post subject:  Re: sr20 converted
so racing a standard computer is going to give you a gold meldal
Author:  Boyracer [ Sun May 31, 2009 10:41 pm ]
Post subject:  Re: sr20 converted
spandex wrote:

Why you need a dizzy for? and yes they do come dizzy,

Webbers would work from on a NA, a NA is dizzy anyways, DET has a CAS, but it will work with either
Something needs to make it spark and without a Dizzy you need to buy a computer. If you've bought a computer to drive the ignition, then it reall is a little pointless unless you already own the webers and manifold. Even the NA SR20's are still ECU controlled aren't they ?
I might be speaking out of my arsk as I'm not familiar with this CAS ?

The Jaycar programmable ignition is no good for you, only has a single ignition driver so not suitable for running a set of coils even in wasted spark config.
Will work as an interceptor on an existing ignition system. Check out the 'Electrical' subsection of the forum.

A set of 45's are going to struggle to get 2L to 9k, if you really want it to go that hard you might have to look at 48's.
Author:  bob260 [ Sun May 31, 2009 11:01 pm ]
Post subject:  Re: sr20 converted
Well, it depends on the competition. A carby SR20 would probably take the gold medal if you are racing Formula Fail.
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