I started my conversion from a single ZS to dual HS4 on my 1977 Midget.
As I started to disassemble my car I found a small crack in the exhaust
manifold. It has not cracked through yet, but knowing my luck it will
happen. I could just reassemble it and hope for the best, or I could
upgrade to a header for my 1500cc. Since much has changed on my car,
non-original dizzy, not much emission hardware, missing air pump I think
I am going to convert it to a UK spec engine. I was reading my Bentley
manual and this is what I found. The UK cars had dual SUs and no emission
stuff, no evaporating canister, and no EGR valve.
This is my plan and I was wondering what the list thinks, any thing I
should watch out for and what have I forgotten.
1. Replace the ZS with dual HS4s and a UK spec manifold. The HS4s
that I have are not plumbed for an evaporative system.
2. Remove the evaporative canisters and hoses and plug the vent
line on the gas tank.
3. Use a vented gas cap.
4. Replace the cat and exhaust manifold with a header. Any ideas
on what kind. If I keep the exhaust manifold (and hope the crack
goes no further) just plug the holes for the air rail and the
EGR valve.
5. Try to figure out if I have the correct advance curve and vacuum
hoses for the engine and dizzy. LOK.
Is there a problem with a UK spec vented gas tank in an enclosed garage that
is attached to the house? If I burn down the house and kill the dog I am
in deep do-do.
One other thing I noticed the intake passages on the stock 1500 manifold are
1" and the HS4 manifold is an 1 1/4". Big difference.
------
Bill Gilroy
w.gilroy@verizon.net
77 Midget
90 Shar-Pei
|