Easy 4K Questions

[RS13]

I had the same issue with my 4K. Good motor, but gutless.

Good, cheap mods; change oil, filter, plugs (not really a mod, but its in your best interests!), Get a 5K carb, or a 1300 Escort carb (with adaptor plate to fit) or maybe try and find some 4K-B twincarbs with manifold.. but people seem to want a lot of $$ for these, and they're hard to tune properly.

Then flows, 2" exhaust (check the buysell!).. If you want more, get the flywheel machined, get a 3K bigport head (better compression, more flow), go to Kelford and get a cam made up, (as I'm aware, it only cost around $120 for a regrind?) and you'd be looking at 70 - 75 Hp.. which is still less than a factory 4AGE.. but nothing beats an angry little 4K on full noise!

Either that, or you could sell the DX to me..

Hope this helps!

[JT]

I'd go 2", a friend has a 1.75" on a 4k with twin carbs and flows in an SR coupe and she goes alright!

My standard bluetop 4age only has 2 inch exhaust, with just a K&N pod filter and extractors it's making 82.5Kw at the wheels. I'd say 2.25 would be a little big on a mild 4K.

[aaron]

yeah man just the simple mods will make it go better decent sparkys, extractors,exhurst,carb go for a 28\36 or 32\36 downdraft weber you can pick the carbs and adaptors up pretty cheap just look in the trade and exchange they pop up every now and again. depending how much you wanna do a cam is a good idea too, just tell the cam place what you want to achive and they help you pick the right grind.

[RS13]

Yeah mang, 2" would be good for flow.. and sound hot too. I wouldn't go any larger.. remember, its only a little 1300 carb!

I wouldn't bother with that Eskie carb on Trademe.. you can probably get a better deal outta the BuySell. If you ring people in the BS selling K-series parts, they can usually point you towards the parts you want, thats how I scored a mint 4K-C for $80!

depending how much you wanna do a cam is a good idea too, just tell the cam place what you want to achive and they help you pick the right grind.

Yus! The only problem with a decent cam and light flywheel, is poor bottom-end drivability.. but huge mid-high range gains. If you just wanted a decent cam for a daily driver, Kelford make to order, just tell them what mods you have, and they make up a cam to suit.

If you do get an escort carb, I've heard good things about them mated with 4Ks.. the only issue is getting an adaptor plate machined up, so it can sit on the 4k manifold. I'm sure a fabricator in Dunners would do it on the cheap.

Just as a side note.. When Toyota used to race 4K's back in the mid 80's, they managed to squeeze 150hp (might be 160?) out of them, non turbo!

Cheers!

[z|gen]

for a start, its a 3K-B twin carbs, and you can get them for about $50 if you know where to look, a 5K carby wont do much at all, i had one on my 4K and it didnt do anything cept create a few problems because of emission bullsh*t, also 3K-B carbs are not hard to tune at all, if you have access to a gas analyser and you have a 3K engine repair manual (i have one) you can tune them easily, i also believe if your going to do with a different carb setup, weber sidedraughts rather than downdraught, or possibly a carb off a 2L cortina motor i think.
but the money you would be spending on working this engine up, if your going to stick another in is pointless and a waste, youd be better off keeping the 4K standard and saving for another engine..just my opinion

[Dell'Orto]

I would LOVE to see 150 out of a 4k...would be mega dollars spent to get it there, well more than what the car is worth.

Extractors are cheap even new, Weber carbs from Cortinas are also cheap, and a ramflo filter (which made a huge difference on mine) are also cheap.
The best thing about these wee things is they are so cheap to modify

[z|gen]

the 3K-B comes with twin downdraught carbs, where as the 4K only comes with a single downdraught carb, $100 sounds about right depending on condition..if its mint take it, if not..id say they are asking a bit to much, iv heard bad things about ram-flow filters as well, try one out yourself and see what happens..you can always change it if you have to, but anything is better than stock..im not actually running any sort of filter on mine - just have the box

but money is not really a problem too much

if it isnt a problem, then why not put another engine in now, it doesnt take 6 months to do it, unless your planning on selling the car then ?

[YeMs]

i have a set of k series twin carbs sitting on the bench at home collecting dust.. manifold, carbs.. the whole who-har. make me an offer, id b glad to get rid of them. also have like 3 or so 4k single carbs sitting round in parts lol.
if u cant afford the gas, i wouldnt go for a mega lumpy cam. drive-ability down low in rpm is quite horrible, really guttles and just sucks gas. my brother has a 5k in his starlet with lumpy cam an its horrible to drive if ur not thrashing it.. but they love to rev lol, if u can get the fuel there, got nice high compression u can thrash the nuts off it all day and it will b begging for more tomorrow. the ramflow filters do make a difference, better than no filter at all, and better than running the standard who-diddly.
iv been thinkin about building up a 5k (or a 7k if i can find 1) with mega carbs, lumpy as cam, 12 or 13 to 1 compression, a couple of other little tickles and chuck it in a heinous old starlet and thrash the life out of it in some club meets hehe. they are endless fun and have a rad growl to them at about 11000 revs.