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Ken Charles! You can run heated or unheated. As David Jacobs states, the MG Metro runs heated. And as David says, you can run either way and see which way is best but, before you do..... you need to understand the effects of water manifold heating and why it exists. It is basically there for economy of operation in light load driving...like around town sort of stuff. As David says, heating the mixture allows for better vaporization of the fuel. True. This allows for a "leaner" mixture for more economical operation (better gas mileage) in part throttle, light load... MORE
So I'm driving along the freeway in my 73 Midget at a nice clip of about 55-60mph on the freeway. I go around a gentle curve to the left and everything feels great. Then I go around another curve to the right and I get the sense that the car wants to roll over. It just doesn't feel quite as stable - a bit tipsy if I had to characterize it. Question: Is this just my imagination or do I have some kind of a suspension problem? Could I have week shocks on the left side of the car?... MORE
Hia Ken, I agree with what Capn Bob had to say, just a couple of points that have not been raised. 1. You mention high ratio rockers (1.5 to 1) are you talking about roller rockers or standard type rockers with the higher ratio??? see below as to why i ask. As C Bob said not that much of a performance gain, but one of the main reasons to fit roller rockers is to cut down the side loadings on the valve when using high lift camshafts. The other point is what you consider to be a road cam... MORE
What about taking a wedge shaped slice out of the mainifold pipes near to the head and getting them rewelded at a slightly reduced angle? Guy "Guy Weller" 22608... MORE
G'day Dermot There were two different 1098cc engines. The first ones (engine prefix 10CG in a Sprite/Midget) had the same 1.75" main bearing journals, and the same bolt pattern on the flywheel/crankshaft, as the 948cc engine. These engines were fitted to Mk II Sprites, Mk I MG Midgets, Morris Minor 1000 and Austin A40 Farina. The engines were all essentially the same except the Sprite had a different cam grind, and double valve springs. And of course twin SU carbies. It soon became apparent that the crankshafts weren't strong enough for the increase in capacity, so the next generation... MORE
The IF of HIF stands for 'integral float'. It's not a seperate assembly but sits below the throttle assembly, around the jet. There is no way to adjust the float for angle so I guess it's designed to be fairly tolerant of mounting angle. Come to think of it (off the top of my head and it's a while since I've been inside mine) the end of the jet sits in the pool of fuel in the float chamber the top of which is nowehere near the top of the jet as it is in HS carbs. I wonder... MORE
It could or you could fit a spacer, machined to a wedge shape. However the studs would then no longer enter the carb perpendicular to it's face. The kludgy solution to this is to enlarge the mounting holes in the carb. The correct solution is to redrill and tap (probably filling beforehand) the stud mounting holes in the manifold. After all this effort I'd have thought it would be simpler / cheaper to get a suitable manifold. Could the manifold face be machined at an angle to, in effect, rotate the carb, or does this not help move the... MORE
Not sure, but there might be a different small bore head on the Morris engine. The original Midget head has casting number 12G295 (1-7/32 Inlet, 1" Exhaust). Don't forget the 10CC type is stronger (2" mains) than the 10CG when looking or another engine. Cheers, Eeg. Eeg.Oberije@... 22587... MORE
No, no Beckers!! Don't lay this on me....wrong guy!! :) Vizard dyno testing shows little, if any performance gain with 1.5 rockers except at higher rpms....me, I'm just the messenger!! Good point about the side loading on the valve stems...absolutely...."rollers" are the way to go in this respect for sure in any case, and the higher the lift, the more "side loading" becomes an issue in wear and tear in terms of "travel" across the stem end. My point is to have an idea of what you want in this respect to begin with, then educate oneself on how... MORE
Hi guys is this the same group i left, some 2 yrs ago. well im back at my sprite now. anyway just started stripping it to replaace the 2nd cill, and also fitting a 5 speed gear box while at it. So while the engine is out im looking to boost power. ie free flow exhaiust , hi lift cam. & poss hi lift rockers . i intend reusing the twin HS4 carbs but fit k & n Filters. Can anyone tell me of a proven choice of parts. ie f0r fast rd use. If I fit cam is... MORE
I think the '73 Midget was a G-AN5 not a G-AN4, sorry. Quesion still the same , What exterior colors for the gold interior? Thank You, Bill French Hilton Head frenchww@... 22552... MORE
Need a little help. The '73 RWA Midget Mk III we got to fix up, was a dark/med blue ( repainted black) exterior with the Gold (Hazelnut/Autumn Leaf) interior. We want to keep the interior gold, Question is: What stock exterior colors were offered in 1973 with this gold interior, besides the Blue? My "Body service parts list" does not show the Gold in a G-AN4 ( Midget Mk. III ) Thank you, Bill French Hilton Head frenchww@... 22549... MORE
doesn't the Landcrab uses five stud wheels?if so, they won't fit cos the MGB has four stud wheels. Regards David http://austinrover.mg-rover.org "David Jacobs" 22530... MORE
yes, late 1275s had a needle roller spigot bush as standard (part No. 13H 4653 or AHU 1026); this has a bigger OD of 0.750" as opposed to 0.625" on earlier engines, so they're not interchangeable. The factory parts catalogue doesn't state when the change occurred, so it's a case of measuring/checking what you've already got. Regards David "David Jacobs" 22521... MORE
Brad, Is this car an import for Dodge similar to an Eagle, made by Mitsubishi? If so STOP TRYING TO START IT NOW, IT IS PROBABLY THE TIMING BELT!!! If it is similar to the Eagle it will have a zero clearance valve system that will crash if the timing belt gets too far out of sync, about a $1,200.00 bill to rebuild the head. I know, my daughter's 1994 Eagle did that in the middle of the Penn. Turnpike two years ago. Can give you lots of pointers on the repair. Steve Quandt "Steve Quandt" 22522... MORE
Anyone out there have any experience with these cars? It is a 93 3000 GT, it just up and died, no warning. Now it won't start, and turns over like it has no compression. The timing belt is turning, but it feels a bit "chunky" when you put your finger on it while it turns. Brad Brad Fornal 22520... MORE
Don, for quite a LOT of $ you can get an automatic face shield that starts light then darkens when it detects the arc. Or for not very much $, you can get replacement glass for your standard mask that has a narrow strip of paler green shading, so you can see where to start, then you move to the normal dark bit to carry on. Or experienced welders sometimes have a face shield on a headband with pivots so they look where they're starting with the shield flipped up, then with a nod of the head at the... MORE
The advanatge is in not lowering the octane of the input charge with oil vapour. Especially important these days because of all the octane numbers we've lost in the years since the cars were amde. I must admit I cannot see the point of this when the running engine provides a good source of vacuum at the intake manifold that needs nothing more than a pcv valve and a bit of pipework. I just do not see the advantage of introducing additional complications and more things to go wrong. Don't misunderstand me - I have no case to say... MORE
Actually, Jeremy... The crankcase pressure is in and of itself the propellent in a "ventilated" rather than "evacuated" system, the former of which I prefer for exactly the reason you state in your post to Guy Weller....less dilution of already diluted octanes. Fr'instance, I think it was Chris who mentioned dragsters with vacuum pumps hooked up to evacuate crankcase pressure and considering THEIR applications I can well nigh understand this, considering THEIR crankcase pressures!! Whoa, whoa!! :) Obviously, for the normal LBC daily driver this would be overkill but the point is made, though we are talking apples and... MORE
"Could you re-route.....to scavenge crankcase gases" Well, you'd be pressurizing the catch can prior to the draught tube or filter I guess. If the pressure was more than was present in the crankcase vent lines, it would pressurize these, as well as the draft tube unless you used one way valves in the lines from the crankcase to the catch can. If you could run the tube from the smog pump through the catch can and down vertically toward the road surface, you'd have a pressurized draught tube and by punching some small holes in the portion of the... MORE
Don... The smog pump injects air into the exhaust after the combustion process so no re-tuning needed. Whatever horsepower is lost from the engine (5?) driving the pump is returned to the driveline (yhaay!). Doesn't sound like much but as a percentage of what the engine normally produces it ain't bad, is it? :) We cut the manifold off at the fittings to the cylinder head and retained these, closing them shut with a drop of lead or solder...I forget what we used it was so long ago. Alternatively, you can find Allen screw/ plugs of the proper size... MORE
Anyone have a home cure for a gas tank that has Rust/Gunk in it, short of sending it out to be proffessional cleaned and coated inside? Thank you, Bill French Hilton Head "73 RWA in Cincinnati PS. With the help of members I found that 1275 Starter at Advance Auto/Worldwide Auto parts. Who would have thourht they would still carry that item. DAH frenchww@... 22301... MORE
Hello everyone, I am just about to remove the cylinder head from my Sprite IV engine. I am not an engine tech guru, and I am following instructions from manual(s) (plus my little personal experience). In the Haynes Workshop manual and in the Haynes Restoration manual the method for loosening the cylinder head nuts is to start from the outside nuts (inc. the rocker assesmbly nuts) and work in removing diagonally opposite nuts in turn. In the official Sprite and Midget workshop manual and in the MG Midget and AH Sprite book by J. Tyler exactly the opposite is... MORE
Chris, Interesting comments. The standard UK set-up has no pcv valve, the hoses just connect direct to vent fittings on the carb barrels. I still feel that the term crankcase "vent" is wrong. It sort of implies that the purpose is to allow excess gasses from the crancase to find their way out. In reality, the system is a much more active "extraction" process, whereby the induction system positively pulls gasses out, creating a negative crancase pressure. Guy "Guy Weller" 22260... MORE
Hello all: I have removed the engine from my midget and re-sealed/gasketed it. I took photos of the timing cover bolts and the particular arrangement of the stud s and standoffs for the air pump/alternator mounts=85and somehow lost them. So now I am trying to put this part back together and want ot get it done right. Would one of you be so kind as to snap a few digital photos of the front left hand (alternator side) of the engine, down where the brackets and stud s attach=E9 to the block and the timing cover? Please send =91em... MORE
