Andrew's Corona

[Super Jamie]

andrew, i notice in your signature you have an ST141 with a modified corolla carburettor, this interests me. i assume you have a carbed 3S? why go to such a small carb on such a large motor? what modifications have been done to the carb? what difference did it make?

 

i like st141s. one of my "build every tough car in the world" dreams is an st141 wagon dumped on big chromies or moondiscs, with a lumpy carbed 3S :)

[andrew]

i am not sure you can get a carbed 3s??? it has a 2s in it which is still a 2 litre but it is only a SOHC engine. i put a 4ac carbi on it. the mods i have made are as follows:

raised float level to suit the 2litre

seriously modified jets

converted to a double pumper

and removel of elec choke and summer/winter actuator

 

 

 

it goes pretty sweet now that it has the rolla carb on it. but the automatic really lets its potential down. so you like them do you? this is actually my brothers one but i have one similar that i am turbocharging the 22re. they are both on there bellys

[andrew]

i have been thinking about that lately as it would be cheaper to register and comply and also one would assume that being a S series motor it would bolt straight up, would it not???

[Super Jamie]

talked to a dude up the carpark once who reckoned he had a cammed and carbed 3S in an ST141. white wagon with centerlines, it's up there a bit. perhap i misunderstood

 

DP conversion is just mechanical secondary right?

 

if you change engine capacity by more than 15% in nsw, or something that's not factory optional in qld, you need to get it engineered. australia wide, if you change the engine configuration (ie 4 cyls to 6 cyls), turbocharge or supercharge you need to get it engineered

 

and yes, from everything i've heard, you can use 2S corona bits on a 3SGTE and get it to bolt up fairly easily. if you used RT corona bits, providing they bolt into your model of course, you could fit a 22RE just as easily. i'd like to see a blown 22RE, Rs are certainly one of toyota's WAY overengineered examples, 3Ss don't have the same bulletproof reputation, but there are alot more bits available, and people push them harder, so who knows

[Super Jamie]

Isn't there some new law coming out about not being able to use an older engine than the car you are putting it in?

thats always been a rule. you can't drop a 4k into say, an echo, because its older. all emissions reasons

 

you CAN do it, but you need engineer certification, maybe even EPA test results ($$$) if you're drastically changing it. my mate's dad put a series 1 12A into a series 2 rx7, and had to get it engineered to certify the engine complied with all relevant standards to the series 2 motor. mainly it was pouring over some emissions diagrams for a couple of hours and a noise test

 

really it depends on who's doing the paperwork, i know of a ke55 with a ke30 3k in it that didnt need squat, just an engine number change, but by the book that shouldn't be allowed. rta/qt/victrans CAN look up what vehicle an engine came out of, and refuse you registration if you don't have all the right bits of paper, but often if the engine number has been cited by the relevant registered inspection station, they'll just go right ahead and change it

 

it also raises questions as to exactly what constitutes an engine, for emissions purposes. i can get some f@$koff old v8 from like, a kingswood, put brand new modern heads and efi on it, and not be allowed to drop it into my vh commodore because the block is older than the car, even though the emissions setup is easily more modern and enviro-friendly than both the original engine and the vehicle its going into

[andrew]

the dp conversion means that in a way yes mechanical sec but both the primarys and secondarys open at nearly the exact same time. and yes even if i wanted to put a r motor like my white sedans 22re all i have to do is change the cross member.

[Super Jamie]

sequential secondaries, cool :)

[andrew]

yes. it make for sweeeeeeeeeeeeet power all the time!!

[Super Jamie]

change fuel consumption much? spose you probably never ran the carb as a progressive?

 

i guess its just a matter of modifying the secondary linkage or making a new one if its not long enough yeah?

[andrew]

yes i made my own linkage for it. but first i had to take all the bullshit vac sec off and then drilled a hole in the primary linkage (3mm) and made a small linkage to go from there across to the secondary linkage where it connects to a bracket allready existing on the secondary valve that i modified slightly. i am very surprised how well it performs now and i havent noticed it using more fuel. i think the consumption may be a little less as i don't need to floor it as often anymore. it has so much more response and torque. :)

[Super Jamie]

i like this idea, i think i'll copy it :)

[andrew]

go for it. it is a relativly easy thing to do for a bit better peformance. in the past i have also applied this technique to k motors and they respond really well to this.

[Super Jamie]

you've played with K motors? wicked! what have you done? in what cars? tell us these things! :)

[andrew]

i built myself plenty of warm 3 and 4ks but my favourite was a 5k i fully worked. it was a 5k block which was acid bathed, bored, decked, fitted with a stroker crank, and celica pistons, a lumpy-ass cam, ported and polished head also decked and running approx 12-13:1 compression ratio. i hand fabricated a custom intake manifold which held 2 cortina webber carbs, and tuned length extractors into a 2 1/4 inch collectors then a 2 1/4 exhast through a lukey muffler. it went f@$ken hard. this was all installed first in my ke55 then it went into a ke70 panelvan with a cig locked diff. it was pretty sweet to drive. did i mention i am selling that head by the way?

[andrew]

oh yeah i still have the cam if anyones interested. nick: yes i discovered that the k's can go very very hard for a small pushrod engine