Guide: How to build a K series motor

[ToDa30/4]

4KE NZ EFI . tb & tps change to ? .what would you recommend. thanks

[oldcorollas]

..........

[ToDa30/4]

as it turns out ,ended up with a 40 mm side draft & manifold,extractors, elect dizzy & picked a tighe # 113 cam as the one for me .plan is to fit the above in the 3K with top gun 10mm leads & hotter coil & get a 1.75 exhaust with maybe two resis & a hi flo muffler,while i slow build the 4K 40 thou. o/s with ACL pistons & transfer the above parts over .including 3K head with CB4 springs & bigger valves (any suggestions ? ) with a head clean up,shimmed oil pump, lightened flywheel to 7 kgs. & tuff clutch with the 4 speed & std diff till i break it,if i read correctly i wont need to machine down rocker posts with that set up or have i got it wrong. efi & sc12 latter .Tom cant drive forced induction till 21 in sa POO, so he'll have to get boost'n in the GT4 at the track for now

[oldcorollas]

if the lift is greater than standard, i *highly* recommend machining the rocker posts...

think of it this way..

currently you have equal valve drag (by tip of rocker) in upper and lower half of lift... ie first half pushes, second (heavier spring force) it pulls.

if you increase lift, you increase the amount and distance of drag at the heaviest part of the spring load = bad...

when i machined mine down, the rocker noise went from noisy, to less than a standard motor... even with 11mm lift...

[ToDa30/4]

tighe state lift at 0.400" not expressed as mm. lift ?so i need to loose 0.060" correct.also with regard to the issue raised about changing the t/body & tps on NZ 4K EFI .change to what please & why?

[madrolla68]

i got a 7KE setup, (inc a ruel rail i bought from toyota for $70-80) for under $300.

i also sold my 4KE setup, that i dragged back from america, for about $300 also.

ring all the commercial wreckers. there MUST be some somewhere.

failing that, a 4KE setup from NZ would be ok.. but then you need to change TB and TPS (to non-4KE ones) and rocker cover (to the 4KE one)

please excuse the size (and shitty engine bay )

7KE on 3K/4K hybrid
fuel filter is from... some toyota...bolts up to the stock coil position... the only custom thing (i think) was the fuel line between rail and filter... the ends were from?? maybe camry/celica.. and made up enzed or pirtek... for about $20-30

Hey im doing the 4KE bit at the moment,how come i need to change the TB and TPS and what do i change them with.

Thanks

[madrolla68]

That is very nice Stu, if i went for a complete 7KE are some better than others or buy as late motor as i can ? then ..fabricate/mod the mounts ,mod the sump for clearance , rad .hose & matching to thermostat housing ,wire in to a/market ecu ,elec. fuel pump & ?.CHEERS

Ok so what is the best/easiest F/Pump to use for this combo

[oldcorollas]

4KE has a switch type TPS, and is only 40mm.... a very hot 4K would only need a 45mm TB anyway, and 7K is 50.
or you could just swap the TPS to a variable type and keep the TB....

main issue is the switch.... and if you are after bigger power, the 40mm is a little small (maybe)

fuel pump.. walbro 190L/hr intank pump...
too easy

[madrolla68]

4KE has a switch type TPS, and is only 40mm.... a very hot 4K would only need a 45mm TB anyway, and 7K is 50.
or you could just swap the TPS to a variable type and keep the TB....

main issue is the switch.... and if you are after bigger power, the 40mm is a little small (maybe)

fuel pump.. walbro 190L/hr intank pump...
too easy

So what TPS do i need to get,any ideas please,this is all new to me.I will run the TB for now just to get it going,but if i need to replce the TPS then i will do that now.

Thanks

[SRacin]

Flow Figures.

Hi All,

Well Im half way thru the rebuild of my 4k kp61 Starlet, and have just had the head cleaned up, well in reality butchered would be a better word. So All that is left is pick a cam and some valve springs,

What i would like to know is what flow figures other people have obtained from mild to semi serious K-series engines.

Mine was flowed and corrected to 28.0" and obtained

Stock @ .450" (have full chart)
In 98.4CFM
Ex 70.80CFM

to currently

141.7CFM
98.7CFM

therefore increase of %44 in and %39.4 ex.

In my opinion this is pretty siginificant increase in potentinal flow, however i would like to know how it compares.

The next biggest step is how NOT to choke it up with the inlet and exhuast systems.


Cheers
Logan

[WDE_BDY]

Sheldon (Blown 5K) was looking at doing a few sets of custom extractors for 3K/4K/5K/7K while he has an engine bay free and all the engines sitting there, might pay to get in touch with him.

Callum

[twentyEight]

Really sorry to dig up such an old thread, but I'm going to replace a head gasket on a 3K tomorrow, and wanted to know what to watch out for on these motors...

Is there anything tricky being that the 3K is a pushrod motor?

Also, I've been trying, without any luck, to find the head bolt tightening sequence...

[twentyEight]

Anybody at all...

[ToDa30/4]

Anybody at all...

http://www.rollaclub.com/faq/index.php?title=Main_Page ,try here m8

[oldcorollas]

Is there anything tricky being that the 3K is a pushrod motor?

no

for bolt torque, look on the head gasket packet.
you are using ACL monotorque BD950MT??