jonbill

I'm sure they'll be fine. I guarantee the buying has only just started though!

No I think you're right, if you don't go over 6 ish much, stick with the 34s. They'll work as well up to 6k as bigger ones could.

IMO venturi size is driven by the amount of air you need to flow, which is dominated by displacement and max rpm you're going to use. Not cam specs so much. There are a few variations of a formula around. Frank Honsowetz's book has this: Venturi size=sqrt(cylinder displacement * max rpm ÷ 1000) * 0.65 Which for a 2.7 with a 7k rpm used redline gives 36mm venturi size. Which sounds right to me. I have a 2.9 which I rev to 8k with 39mm venturi. Should prob be bigger but that's getting to the limit of 45mm body anyway. Some will say you should have smaller venturi for the street: The bigger the venturi the harder it is to get the transitions between idle and progression and main jets right but it is possible.

I've just finished a Speeduino 0.4.3c ignition only install on my car. It uses a 36-1 crank damper trigger wheel and a TPS with a Bosch clone wasted spark coil pack and igniter setup. Probably about £250 all in but could be done cheaper I'm sure.

My f54 is at 88.5 so 2915 with Kameari pistons and Maxspeedingrods l28 rods. I wish I'd been braver and gone 90. But it goes nicely so can't complain.

These guys sell shims that thick and thicker. http://www.precisionshims.com.au/products/slotted I have them in my engine and would recommend them.

With plugs that cool, I think they'll foul pretty easy if you're not loading it, which could be the case if it's been off the road for a while. I'd stick a new set of plugs in, gapped at 0.6mm

Not sure if someone already mentioned it - check the thermostat. It could be stuck part open, could be in the wrong orienation and unable to open fully

Another update to this old thread, since I looked and couldn't find this anywhere. I just got a Hitachi OUP0016 'turbo' oil pump from Rockauto. The pump itself is marked K11 - no other marks, not even a Hitachi logo. But I opened it up and the rotor is indeed 40mm.

Hi, I don't know the Mikunis specifically, I have Dellortos, but the Mikunis look similar. I have modified the pump jets on my carbs to fire at an angle of maybe 22.5 degrees to correct for the curve of the manifold runners. like this: ..../..\...\../.../..\... So - perhaps someone has tried something similar with yours before you had them. And you or someone in between has had the jets out and put them back in the wrong positions. Are yours really 2 straights ahead and 4 to the right? or something more like mine?