Mods to do to a Dual Carby motor

[sPoOnD_]

hey guys, i got a EG hatch with a Dual Carby. Was wondering what mods i can do to it?

[MikeyG]

nothing...

[hisoka]

sell it and get a fuel injected one if possible, or just keep save your money for a 1.6 litre twin cam motor.

or just make it look like it has one~

[ZeForce]

B18c with B16a head

[hisoka]

lol zeforce your so extreme LOL.

you talking about b18c2 with b16a head . how good are these, iam about to purchase a b18c this week possibly , wondering if its worth putting the b16a head on or just working the vtiR head.

[ZeForce]

lol zeforce your so extreme LOL.

you talking about b18c2 with b16a head . how good are these, iam about to purchase a b18c this week possibly , wondering if its worth putting the b16a head on or just working the vtiR head.

lol, stay with the straight B18c it is a good base build on

[MM89]

you can get rid of the black box and intake arm
and replace it with 2 velocity stacks with an air filter
of some sort.

get better carbs - weber if you're really keen on this motor

if the throttle cable seems loose, undo the locknut and
tug on the cable so that there's minimal slack.

gear ratios - i think mfactory make closer gears for D15 box.

headers exhaust etc

thats about all i can think of until you save up enough for
a better motor - B or H or K series if you're planning to keep the car.

From experience, get some better airflow going and then headers+exhaust
if you MUST. I played around with weight reduction for quite a while which was
free and made it a better car to drive. Won't give much or any noticeable
increase in straight line performance, but fuel economy, tyre wear and most
things will benefit with a diet.

[V73C]

Please don't bother. just save your money for a different engine or buy another car

[SlobberGoat]

"First, get two motorcycle cone filters, the ones for performance bikes. Then, remove your stock airbox completely, and block off all attached piping. DO NOT block off the breather hose that goes from your valve cover to your stock airbox, get a breather filter for this one. Remove mesh covers and spacers over carb throats. Take the two cone filters and push their rubber ends THROUGH the spacers. Bolt the spacers with filters attached, back onto carb throats, without the mesh covers. Chuck them in the rubbish... you might have to bend two little copper pipes next to throats slightly inward to accommodate the cone filters. Don't worry, they are purely for atmospherics. If you are not sure about the size filter, take a spacer, drive to your bike mod shop and compare sizes before buying. If you can, get filters with the rubber ends slightly larger than the hole in your spacer, to ensure a snug fit. You might have to use super-glue to make them stick... do not worry about a CAI. Carbs respond much better when they are sucking in air from 360 degrees, as opposed to from one direction only, such as a CAI. The gains from two cone-filters on the throats is much bigger than what you would gain from a CAI. Cold air is great for FI, but free breathing is GREAT for carbs.

Next, you do the Keihin CV Carb mod: You will see two silver lids on your carbs, where it says KEIHIN. Carefully remove these lids by unscrewing the screws that hold them in place. Careful not to drop any screws or dirt into the carbs once you've taken the lids off. Underneath you will see two long springs. Take out the first spring, measure it, and then cut off 3-4 coils of the spring. Now, stretch it to the original length... repeat the process with the second spring. Make sure they are the same length as before they were cut. Next, look at the open carbs again. You will see two little plastic stoppers on top of the two pipes that the springs fit over. Mine were black, so yours might be too. Remove and file them.

Now, take the springs and put them back where they came out of, with the uncut ends facing DOWN. Carefully replace the carb lids.

What you've done: The springs control the rate at which the diaphragm piston valve rises when you push the accelerator. After the mod the valve rises much quicker, due to lessened spring density. This vastly improves throttle response. The plastic stoppers prevent the diaphragm valves from raising above a certain point, to keep fuel consumption low. The higher the diaphragm raises, the bigger the needles open, the more fuel you get into your engine. The increased air from the cone filters and the fuel from the quicker lifting and higher lifting diaphragm means a cool 10-15HP increase (if you have a decently built engine already, otherwise, expect less)...

If you want to go even more, you can machine one (1) millimetre out of the carb throats (you will need bigger butterfly's), and source larger jets from Honda bikes or Harley Davidson bikes. They use the same carbs... But this is going extreme. Harleyheads get an extra 20HP from machining and rejetting their carbs. But then they are not very streetable, and your fuel consumption goes for a dive...

But then again, performance means more air-fuel is needed anway..."

[dougie_504]

Hey man,

You could always get tyres and suspension. Would make it handle real well and go better. Otherwise change the motor over or keep it standard I reckon :)

[F.O.B Squad]

I think you can use some motorbike carby's for a performance upgrade.

[iamhappy46]

D15B swap ;)

http://www.cardomain.com/ride/2101817

[u mad?]

Hey man,

You could always get tyres and suspension. Would make it handle real well and go better. Otherwise change the motor over or keep it standard I reckon :)

id do this