After working out the prices of getting bike carbs setup ive decided not to go that route now, i have decided on getting a powerbox made up to sit on top of the lower manifold.
Im going to take my lower manifold down to my local fabricators next week so they can make one up for me. Need to ask a few questions before hand.
What material is best to use alloy isit ??
How thick do i want the material ??
Will i be able to use my throttle body with the powerbox etc ??
What exactly will i need to be plumbed onto the powerbox (vacuum pipe etc) ??
Haa you lucky git. Have you seen the mantzl inlets, its just a home made one of them.
Removing all the restrictive piping and having a box sit on the lower inlet manifold.
Smoother accelerating and hopefully some gains haa.
yeh i get what you mean. you will just need to see what pipes etc come out of the manifold and just make a take-off for these so its pretty much a direct replacement. I have just made a bike carb manifold for the grand total of £0 lmao combined with carbs at £55 and a fuel regulator at £15 makes a very cheap conversion so the only cost now is silicone hose and setting up
got a set of CBR900 (Fireblade) carbs. Nope im an engineer so its not exactly brilliant but it should work. Made it out of mild steel as i can use this without paying for it. Had to use stick welder as no gas left for MIG
The powerbox inlet needs a skimmed flat face on the underside to ensure a good seal with the lower inlet. It needs a plate on the end for the TB, again skimmed flat with the 4 bolt pattern for the TB. Get 2 or 3 vac take offs threaded or welded on. You may only need 2, but the 3rd is easily blanked until needed, plus a vac feed for the servo pipe. The mounting bolts pass right through the 'box' so make sure the box wont crumple or distort under fastening.
Pretty easy really. Showing an engineer a pic of another box. Giving him a TB & lower inlet to use should mean it comes out properly. Just be sure to know roughly what dimensions so it fits under the bonnet & the TB between the strut turret etc.
Alloy is best & I'd say something 4-5mm would be ideal. Too thin & you risk it breaking open.
The powerbox inlet needs a skimmed flat face on the underside to ensure a good seal with the lower inlet. It needs a plate on the end for the TB, again skimmed flat with the 4 bolt pattern for the TB. Get 2 or 3 vac take offs threaded or welded on. You may only need 2, but the 3rd is easily blanked until needed, plus a vac feed for the servo pipe. The mounting bolts pass right through the 'box' so make sure the box wont crumple or distort under fastening.
Pretty easy really. Showing an engineer a pic of another box. Giving him a TB & lower inlet to use should mean it comes out properly. Just be sure to know roughly what dimensions so it fits under the bonnet & the TB between the strut turret etc.
Alloy is best & I'd say something 4-5mm would be ideal. Too thin & you risk it breaking open.
Ok thats exactly what i wanted to know, what type of things will make it crumble mate.
I shall get all the dimentions/measurements ready on boxing day and get one made when the re-open.
The pulses from the combustion cycle can make an inlet fail (or too much NOSS!)
Having it curved slightly at the rear R/hand edge might help flow the gases to the end cylinder better too. Find a proper Mantzel pic (search my Nova build in projects)
The pulses from the combustion cycle can make an inlet fail (or too much NOSS!)
Having it curved slightly at the rear R/hand edge might help flow the gases to the end cylinder better too. Find a proper Mantzel pic (search my Nova build in projects)
Right guys im having this powerbox made up on the 2nd week of this month, anyways before i give him by dimentions etc i want to know what size i want my box.
I im correct different size boxes will determine where the torque levels will be most at their peak. Can anybody elaberate on this please ??
Also would it be better to have the flange cut off the top of lower manifold and have the box welded directly to that, that way there will be no need for the bolts going through the box creating interfierance.
How much are you after for that, minus the throttle body
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