I have these spacers as part of a Victor Reinz gasket kit for my Type 4 but I'm wondering if they have the gasket incorporated into them or if I need a couple of gaskets per side to go top and bottom. What do you think?
They are phenolic spacers I believe to stop heat transfer boiling the fuel off in your carbs. Yes a gasket each side is what I'd do. Edit: See others below - these are for FI only and have thin gaskets stuck on them already
And I think those are if you have FI as the manifolds dont need to warm up.. the heat spacer (smaller single ones ) goes between manifold and carb otherwise to stop the carb from getting hot.. though some don't bother at all just fibre gaskets throughout.. Sent from my SM-G930F using Tapatalk
Yep there are gaskets stuck on them. Very thin and feel a little rubbery. Just wasn't sure if on these you need to double up with standard gaskets too. I've used an insulating spacer up at the manifold to ICT carb end as well so is there a danger I'll be running too cool with these as well? What's on the the engine end of the manifold as standard?
You want hot manifolds and cold carbs. Those insulating gaskets are for fuel injection engines only but IIRC you can cut one in half and use under ICT carbs. Not perfect but works. They are complete, no additionsl gaskets required.
School day today Glad I didn't use them then - I too used individual ones, bought from somebody on here that was selling them, under my IDFs.
Thought as much. Ok I'll ditch these for standard gaskets then. To keep heat out the carbs I have these on so should be all good:
For carbs, the base of the manifolds get the metal gasket. The phenolic spacer goes between the manifold and the carb. I did not run the spacers when using Weber 34 ICT’s with the short manifolds and had the boiling fuel issue. The stock dual carbs with the tall manifolds use the spacer too.
Those Empi manifolds tend to be too short and can cause fuel peculation in the ICT carbs. I swapped mine for some CB performance ones which work a treat
I understand that to be the case, too. I also believe the short length EMPIs do not do great things for the chemistry to take place (torque?). I dunno the precise science but I've tried to raise it all by using the aluminium spacers and the thick heat shielding gaskets until budget allows for the CB kit. May work. May not.
Yes longer manifolds give more torque. More weight of air is trapped in the manifold when the inlet valve closes which the following air through the venturi pressurizes ready to better fill the cylinders when the valve opens.
To close this off these arrived today. Should be correct and all good to go at the bottom end. Just waiting on 150 Needle Valve from Classic Carb which should be today, too.
Still no 150 NV but I've started stripping down anyway. Out of interest, as the ICT fits the standard manifold is there any reason not to go with that? Does it mess up the linkage?
As you have all those parts you're best placed to answer that. I didn't know ICTs worked with the stock manifolds.
