bike carbs? Thats the budget for a working set up.. What would you do.. I have a 2l silver top in the garage out of a mk2 si mondy with 77k on it. I would really like to make my si faster than all of yours :O) or at least somewhere in the 170 bhp mark. Help and ideas please I dont know which route to take?! then the gearbox what will be best suited? I would like my Si to be a ninja on the back roads but still ok for 100+ on the motor way! not to much to ask? is it? thanks muchly

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THE DON..... DON DIGGLER

Erst box is best as it has an lsd.
Would of thought you need more than £600 to achieve 170bhp id rather buy and fit an st170 lump which is basically a black top zetec.

r1 carbs, bogg bros inlet, mega squirt, series 1 rst box with lsd fitted, should see aound 150-160bhp quite easily with that setup properly and could do it for less that £600 if you spend wisely and do the work yourself

put the £600 towards a new car? lol theres only so much you can do with that money for 170 brake lol.

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'It's not a car, it's a daily project..'

if you go for carbs you need to get megajolt ignition management, thats a cheaper alternative, and go for an ib5 box from an escort mk6 etc as the starter motor is at the back so you can fit a four branch manifold and a more free flow exhaust system with a decat, i advise putting a 2.5 inch diameter system exhaust on as that will improve aid for the new inlet.

Thanks guys for the positive posts i got the four branch n just so happens its 2.5 started wrapping it in therno tec today, have also been trying to find a gearbox but there all like 250 with lsd any more info on the R1 carbs and mega squirt would be greatly recived thanks guys :O)

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THE DON..... DON DIGGLER

if your getting R1 carbs, you'll need to have different jets fitted, either drill them out to 0.6mm or buy proper 0.6mm jets, as the hole is tapered, and it using megasquirt, get the later type of carbs from 2000-2003 with the inbuilt tps sensor

bike carbs o na standard engien will get you 150 bhp you will have to have camsand a four branch which will get you to 165 170 bhp and decent management