new owner '74 TCS misc ?

[Lumbes]

This is what I have not including the air filters.  I forgot to include them in the pic but have them.

[TurboFource]

So you still have to make an adapter to mount carbs to secondary manifold or does the rubber boot line up with two of the bolts from the square bolt pattern? From pics it looks like they line up.....


The studs should come out.....double nut them.

[Lumbes]

This is what I'm thinking.  I could possibly have bolts run through without much issue and to prevent bowing from occurring when torqueing it down I can fill the void with a steel sleeve/spacer.

[Pfreen]

PFreen made his own balance tube setup I believe.....maybe he can post a pic.

I posted before.

http://www.lotuseuropa.org/LotusForum/index.php?topic=3793.msg40329#msg40329

[TurboFource]

That should work Lumbes. You may want match manifold to rubber boot I.D. So there is no step.

[jbcollier]

Interesting.  In that case, you only need gaskets between the head and the secondary manifold.  The rubber flange is its own gasket, though I would still use a little hylomar.  Remove the six studs from the carb end and fit 4 extra-long studs to the head so the secondary manifold is sandwiched by the four studs holding the rubber flanges in place.

[Lumbes]

Excellent.  Thank you everyone for the help.  I'll shoot an e-mail to RDenterprise and ask them if they have gaskets for the head to secondary manifold.

[Lumbes]

I would like to match the IDs of the manifold and the rubber boot to avoid the step cause it looks like it would disturb the flow but how is that done?  The secondary intake manifold looks like it has some type of brownish/amber sleeve in both openings

with holes cut for the bottom balancing pathways.  What is that stuff?  Looks like if I removed those "sleeves" from the manifold the boot id and intake id would be much closer to matching.  Sorry for all the newbie questions

[TurboFource]

You would scribe a line with the rubber boot installed then remove the boot and remove the material out to meet the line, you want this to be tapered so it gradually returns to the original bore size. You could use a grinder and carbide burr or even a half round file. Just go easy, it is easier to remove more material than to add it back!

[jbcollier]

Your secondary manifold has been sleeved to seal off all the unwanted passages.  Usually your would bore it and fit sleeves that then returned it to standard size.  Looks like they didn't bore it first and the added sleeve makes it undersize.  The simplest course is to push the sleeve out and fill the unwanted passages with Devcon aluminium putty.  You could take it to a machinist and have them push out the old sleeve, bore it and fit a properly sized sleeve.  It would be a great repair but not cheap.

[Lumbes]

I hand tightened some hardware together to do a quick mock mounting of the setup away from the engine.  It is all seeming very possible and I am able to tell what is happening now.  When looking from the back of the manifold it appears the pathway follows the

same I.D. until it reaches the carb port where it steps/reduces.  I can upload more pics at a later time.  Would like to do this as close to correct as possible so going to look for a local machinist being from the sounds of it I'm going to need it.

[jbcollier]

So, the rubber adapter is smaller than the secondary manifold?

If so, please disregard my advice, I thought it was the other way.  Not 100% ideal but much better than the other way.

In this case, simply build up the ports with 2-part epoxy (JB Weld) and use sandpaper/dremel to make a smooth transition from the adapter to about half-way along the secondary manifold.

[TurboFource]

Same here.....going from the carb to a bigger ID is better than the opposite situation.

[Lumbes]

Gaskets from rdent should be in tomorrow and will be working on building up and tapering the ports tonight.  If all goes well I'll be putting the Mikunis on tomorrow

[jbcollier]

Excellent!

I should ditch my Dells and fit four Mikunis to my crossflow!