29 replies to this topic

[monster_mini]

ok thanks:)

if it is a mini manifold, then what are the chances that the float bowl adapters that everyone keeps telling me to change are actually the correct ones? how can i check if they are or not?

thanks again

[Big_Adam]

Float bowl adapter?

That just give the angel of the bowl to the engine. On my old HS4 I just cut up the stock one till the float bowl was flat to the floor (parallel?) and pinched the bolt up.

[monster_mini]

ohh i see, if thats all it does then thats ok, if its only a few degrees out whats the problem anyway?

[monster_mini]

alssooooo

i want to put two k an n cone filters on, which do i need? just 2 * hs2 k'n filters?

thanks

[dklawson]

ohh i see, if thats all it does then thats ok, if its only a few degrees out whats the problem anyway?

If the float bowls aren't level, the level of the fuel in them will not be accurately controlled. That can allow a "high" fuel level which will in turn cause fuel to be able to siphon out of the jet in the carb throat. It will make tuning difficult.

Cone type K&N filters should work fine.

[monster_mini]

hello again:) the manifold which is on it now is the mini one:) one more question though,

between the manifold and the carbs is a spacer on each side (probs an inch in added distance)

do they need to come out to get the carbs to fit? (i can put a picture up if needed

Thanks again

Nick

[tommy13]

hello again:) the manifold which is on it now is the mini one:) one more question though,

between the manifold and the carbs is a spacer on each side (probs an inch in added distance)

do they need to come out to get the carbs to fit? (i can put a picture up if needed

Thanks again

Nick

I am in the process of fitting twin HS2's to my lads Mini. I think the spacers you have will be too thick. Mine came with spacers about 3/8" thick. If you push the carbs back too far on a Mini the bottoms of the jet tubes hit on the bulkhead, especially when they lower with the operation of the choke. Any engine movement ( flexing of the head steady bushes) then causes the jet tubes to bend.
I have added a link on tuning SU carbs I hope you find interesting.

http://www.sterlingb...ng_SU_Carbs.pdf

For any parts try here,
http://www.sucarb.co.uk/

Edited by tommy13, 07 December 2010 - 07:42 PM.

[monster_mini]

thanks sooooo much:)!!!

thing is, im reluctant to strip them down, because i've taken the pistons out to have a look and it looks spotless, so im going to just put new filters on and bolt them on! (after i've taken the spacers out ofcourse) keep me updated on how putting yours on goes ect:) thanks again:)

nick

[monster_mini]

also, what airfilters have you got? i want to buy some k and n ones, but there so expensive and i can only find them brand new:/ any ideas:)?

[danrock101]

just use the ram pipes they've got on them and put a sock filter on each, there wont be much differnce in it and they'll sound amazing!

Edited by danrock101, 12 December 2010 - 04:47 AM.

[Bungle]

also, what airfilters have you got? i want to buy some k and n ones, but there so expensive and i can only find them brand new:/ any ideas:)?

that's because you get what you pay for

cheap sock filters don't filter very well and restrict power

[tommy13]

also, what airfilters have you got? i want to buy some k and n ones, but there so expensive and i can only find them brand new:/ any ideas:)?

I used the standard original filter box. There are several on Ebay at variuos prices.
The K&N's are an excellent filter, unfortunately for me, I no longer find induction roar as much fun as I once did.

[monster_mini]

ok:) well i took the plundge and bought two KnN filters:) hope they're worth the extra money:) i took the rediculous 7/8 inch spacers out between the carbs and inlet manifold, and i was wondering if people thought it was worth me buying a correct sized spacer to go inbetween? how much torque and power would i gain from fitting a 3/8 inch spacer? also, why cant you buy a stub stack (i think its called) for the inch 1/4 su?

Finally, with out manifold, our float bowls will be very slightly off verticle(hardly noticeable) will that be ok?

thanks

nick

[tommy13]

Nick, after my post concerning the spacers, I have accurately maeasured the spacers I have and they are much nearer 1/4" rather than 3/8". Do you have the heat shield fitted ?, as I think without these spacers the float chamber bottoms hit on the shield.
I have been fitting my twins today and there seems to be plenty of clearence between the jet tubes and the bulkhead. Have you tried fitting yours with the 7/8" spacers (also check the air filters fit in) I assume the spacers were there on the Healey for some good reason. I have read about tuned lengths of inlet tract and various articles which suggest longer is better, although I have no experience in this field at all. I only mentioned the spacers originally because of the restricted amount of room on the Mini.
If your float chambers are almost vertical I think you should be OK, after all the angle changes with the gradient you are on and the car hopefully keeps running.

[monster_mini]

ok thanks:) i have a heat shield, and it looks like it clears the float bowls just fine because of the bend in the heat shield:)

regarding the spacers though, i dont know because i dont have a mini anymore, and im just building them up ready for the next one so i cant try them unfortunatly:( hummm:/ this is a pain now, because if they did fit it'd mean i wouldnt have to change the studs from the manifold to the carb......hummm i dont know what to do now:(