GJM85

That's cool.

It's actually EGR. Exhaust gas recirculation. Operated with a vacuum controlled valve. When under throttle it does nothing. When you back off the pedal the fuel mixture leans and the engine begins to produce higher levels of carbon monoxide, nitrogen oxides and hydrocarbons. The increased manifold pressure at closed throttle opens the valve and allows these bad guys to be recirced and reburnt.

Going, withor without, bitches!

I've pulled down a 4k carb off a ke55 and a ke70. The 55 had 106/152 mains & the 70 was 108/152 mains. All had 49 idle jets. All main jets are exchangeable. The idle jets are different between 3k&4k.

Take the carby top off. Idle jet is the small size flat bladed screw. The jet is about an inch long and has an incorporated emulsion tube. Mine was a 49. Mains are there in the fuel bowl. Mine had a 102 primary & and a 162 secondary. Air correction jets? I believe it's built into the casting.

T series a are not as common but have way more potential for good power gains. Performance parts are readily available in the U.S.

To work out how much juice you'll use, work out the cfm per rpm. At the ratio of 1:14.7 you can estimate your fuel consumption no matter what your induction set up.

My 5k has pushed 95mph with a stock cam and a 5speed, 4.11 diff. The alternator was over running, the charge light on, 5000rpm. It didn't have anymore and I won't be in a hurry to do it again. Getting nabbed now would be arrest, instant loss of license and 7 day impoundment.

Aye!

5y's are standard plugs and are fine. Black plugs are a result of overly rich fuel mixture. Too much fuel. Start looking at the carburettor. Idle mixture and idle speed screw. Possible rebuild kit. It's hard to say anything without knowing the overall engine condition.

Do you know what they are from?

Yeah likely the manifold gasket. You want to check for vacuum leaks as well. Any missing, split or old vacuum lines should be replaced. It's not hard to replace the manifold gasket. Just give it a go!

Shouldn't the pistons and rods be equally balanced first so the counterweights of the crank can be matched?

I reckon my 5k puts down around 80hp and 60 flintstone feet of torque at 5000rpm. Weber DGV, big port manifold, port matched head, 20thou over bore, stock 4k cam, tube headers and 2" straight through.

Have checked the points gap in the dizzy?

Just don't tell them...

If the gutted 5k lifters and 3k rods work, use it. or you could run chev solids with a12 rods. The could be machined down.

You could even have to a12 pushrods machined down a few mm as they are a solid item.

If you we're to put a 2mm shim under your 4k adjustable rocker posts and used the a12 rod and chev combo you may have the clearance and adjustment to get away with it.

This is a lot to get you head around at first but you can work with it. There are 2 hydraulic 5k's & 1 solid 5k. Yours. Deep piston, 76mm shallow combustion head(same as 4k-u), hydraulic lifters, 150mm ball & ball pushrods. Mine. Shallow piston, 82mm deep combustion head(same as 4k-c), hydraulic lifters, 156mm ball & ball pushrods. From all data I've come across the 3f solid lifter is assumed to be the same as the 5k solid. I have not seen or read anything that has confirmed that tit bit. I've never seen one or seen images of the 5k solid lifter/rocker gear. It could almost say it's mythological. Datsun a12 pushrods are 152mm and work great with chev small block solid lifters. People say 202 solid lifters but all 202's ran hydraulic lifters. Anti-pump hydraulic lifters were designed to replace hydraulics in performance applications to eliminate lifter float at high rpm. My set up is shallow pistons, 4k-c head, 202 anti pump lifters, a12 pushrods and adjustable rockers on a solid cam. I run 0.10mm valve clearances. Any more and it rattles. In my next build ill run hydraulic. Any rocker adjustment required due to cam lift will be countered by shaving or shimming the rocker posts accordingly.

You will need ball and cup pushrods 150mm long.

You need 150mm pushrods and non-adjustable rocker assembly to run hydraulic lifters.

What type of 5k head? And what pistons are being used?

In the 3 years I've only seen one with the exception of car shows & that was a matte black one in Samford.

I've got a ke70 starter on a 5k in my ke20. No warken forries.