i reckon to get the best performance out of your A15 carbie wise i would go twin webers but then to top the webers would be quad motorbike carbs but thats a fairly fiddly setup to get goin nicely but are pretty darn mean

rito thanks

definately not single sidedraught= 1 ventury per 2 cylinders twin sidedraughts=1 ventury per cylinder so even if you had a big single it would have to be double the size to produce the same figures as twins but would not respond very well at all

also would a single 42-45mm side drauft webber be better the twin 40-42's?

o ok mad....seem to go hard aye...so wot would cover a full a15 build? 5000-6000 from jts..eg boare out,double valves springs,cam...everything needed minus my 4into1 extractors and my 32/36 webbs as they will do for a while after the build

im not sure on the 1200 and 120y in the las tvid but bobs1200 is a series and the dyno run is a series

thats mad sh*%t....thanks man...so are they all a series?

bobs1200 a series monster
link

1200 dyno run
link

also check this one out, there is a 1200 and a 120y in there
link

$2300 is pretty cheap for a well built A15 I spent close to $5k on my old JTS A14 and made just over 150hp was very reliable and at the time was suprising quite a few high tech turbo cars!!! Remeber when the WRX first came out the old A14 would stick with them to around 160kmh !!not bad for a little pushrod engine. Yes Ca18dets go better but a lot more hassle and expense. Good luck getting one in and running sweet for under $6k engineered.
Cheers Andrew
PS: I still miss the sound of my old A series had the nicest sound at around 7500 If I where to build another 1200 I would probably gor for another Aseries and thats after owning a 230rwkw ca18 coupe!!!

In that case save your money and run boost with LPG simple, economical and allows for further development without the all the wiring.

Simple LPG setup is gov. covered

Stock A15 with copper head gasket and heat proofed combustion chambers, valves, ports etc. and simple cheap, manifolds will make reliable 140hp for under 4kAU$.