altezzaclub

Port size I don't know, but you can be sure the 5K has a bigger combustion chamber. So a 4k onto a 5K block should raise the compression and a 5k onto a 4K block will lower it...

Just trim a little off the stock spring if you want to lose an inch or so. Don't go crazy and take 50mm off like a lot of guys do... ruins the ride! Twin SU carbs or twin Webers or a nice quad setup off a motorbike! You'll find post about all of them in here. It depends on what you want the car to do... trackwork/hillclimbs, traffic light drags, drifting or just try to keep up with the traffic on the M5... Its no good doing carbs without the exhaust, and its not much use doing those without a cam as well... Check the cable has enough slack at idle and the horrible slow-deceleration diaphram is working OK.

Sounds like a general tuneup and service needed before you hunt any further. Check points, good spark, timing, timing advance on throttle.. get that side sorted. Where is the exhaust leak? At the manifold or down the pipe? Could it be an inlet leak as well that is leaning it out? Let us know how you go...

Haha! As one aged unappreciated dad to another.. GO DADs !!!

How did it run before it blew this headgasket?? Did you get to drive it down the road??

Sorry Rob, I didn't see this earlier.. I bought one for Ryan a few years back, and he sold it eventually when he bought his Levin BZG. Great little car for a single guy and cheap as dirt to run. Was obviously a Jap import in NZ, 5EFE I think it was. Ask him about it when you're around next. I was thinking of one for Ashara if I hadn't gone RWD. I suppose the Aussies tried hard and fked it up as usual... They seem to ruin any Japanese car! http://english.auto.vl.ru/catalog/toyota/cynos/

hmm.. I took those off mine and put blank ones on. So- Have they run fine in the past, or has this been a problem since you fitted them? If it has always been a problem I suggest you take them off and loosen the screws in each throttle plate to allow the plate to reposition itself at "closed". They may slightly crooked and not closing completely. If the problem has arisen without touching anything, do the idle screws still allow the throttle flaps to close completely? Any of the joints may be working under stress and holding the throttle open a whicker, something you can usually check by pushing each idle screw down by hand. Is the mixture set well when you lift the slide pin? and of course, is there oil in the dashpot?

Fins! Fins!!!! Put lots of fins on it to act as an oil cooler!

They should give you more power right through the rev range, as a big single carb is just a compromise everywhere. Its just like fitting twin Weber side draughts, but more trouble! It crossed my mind for the KE70, but I haven't got the gear to weld my own manifold up out of steel pipe anymore. SUs will have to do for me. If you're keen you can airbox them with a cold air intake and run a recent-model Corolla filter.

4AGE.. conversion bits are around.. 3SGE & 6spd.. Altezzas drop straight in... any 4cyl RWD motor and gearbox combo, like a Mazda MX5 1800 & 6speed, Honda S2000... I'd say keep it light and revvy!

haha.. they're talking 4K dyno sheets remember! What's that from? 4AGE??

General tuneup needed I'd say- Plugs, points, condensor, air filter & check the timing, the mixture and idle screw....

Solved! Test head doesn't, but hopefully the head on the car does! This is the Xmas holidays job! Thanks guys....

Couldn't agree more! Just nailed some kid on Altezzaclub for exactly the same thing-

I'll be fitting the SUs to the 4K over Xmas and on the test head I can see the alignment of the Lynx manifold with the ports is terrible. The correct way to sort this is to put just the manifold on in the best position, then drill through the manifold into the head with a 3 or 4mm drill and insert expanding roll pins. They stay in the head each time you take the manifold off (in theory) and it means the manifold is located to within a mm or so. Has anyone done this on a K head, and where did you drill?

Wrong way round Lexuskid- Get a big pipe and a small muffler. You can always change mufflers easily, but with a stock exhaust size you won't get flow gains. Go get extractors & a larger pipe, then use a clamped joint to fit the muffler. Then just keep changing mufflers until the cops stop harassing you!

http://www.ke70.com/forum/index.php?showto...amp;#entry10181

Same as any engine... I don't think there are any great strengths or weaknesses in the 4K. I always feel Nissan made stronger bottom ends than Toyota in those days. I was rallying Datsun 1600s against Toyota TEs at factory level and the Toyotas took more looking after. I'm fitting SU carbs, but you could use the Weber downdraught or twins of the same or twin Weber sidedraughts or quads of a motorbike or.... how deep did you say your wallet was?? You will end up with an old-technology, 1300cc (read "low-torque) revvy engine that will keep up with the traffic on the motorway.

Yep- heats the intake on a cold winter morning.

I posted up my experience on KE70.com - covers most of it.

The car's OK, but we want pictures of The Cat!! :P

yeah- I'd look for an air leak for one, or over-rich would make it bog down as well. This should be an interesting one to solve...

Dead stock motor is it? ..and what type of gearbox?

Far too much- was getting on for 4000 I think- Fitted a 5speed to solve it, especially as we are using an auto diff with a manual box.

...and the condenser has a lot to do with a good spark. If you change the coil swap the condenser as well.