Turbo Efi 4K 30/55

[OckyDrifter]

Hey, new too Rolla Club and just thought id ask for your thoughts on a build I'm considering for my 78 Ke55.

 

I recently picked up a 80's ET factory turbo pulsar with a blown g/box. The car had aftermarket goodies on it that i will update with pictures and numbers tomorrow but they are as following.

 

*Newish Garret t25 with wastegate

*Microtech mt8 computer with hand controller

*Fuel regulator

*Aeroflow boosttap

*Turbo timer

*k&n filter

*china intercooler

* Autometer guages Oil temp/Tacho.

*2" exhaust with 4" cannon

*Battery relocate kit New box battery large thick power cable.

*Radiator ,10'' thermo and aluminium overflow tube.

 

Ive also taken the dizzy and leads, fueltank with fuel pump, Exhaust manifold, intake system with fuel rail, injectors all wiring.

 

1. First Off $600 a good deal for above parts mentioned?

2. Could i cut and shut intake too stock carby manifold and run the efi setup with the microtech.

3. Cut and shut exhaust manifold/ or J pipe it.

4. Fuel system???

5. Can this all be done too a stock 4K with 80000kms?

 

PLEASE NOTE ! . . . .

 

I want to do this just to have a play with the car on the track, until i can purchase and rebuild a 4age or beams then hopefully run the turbo system ive acquired. Reliability isnt a real factor, its more for a giggle and get the feel for the car.

 

I will update with photos of the car and parts tomorrow, with the right advice ill start a build thread soon.

Cheers Ocky.

Edited November 19, 2014 by OckyDrifter

[Super Jamie]

Sounds like a good deal to me.

 

You can do all that stuff, but expect to significantly shorten the life of the motor once you get over 6psi.

 

I don't think it's necessary to J-pipe under the engine, though that was popular for a while.

 

You'll need to convert to an EFI fuel pump.

[Taz_Rx]

Hey mate, I may be a bit biassed on this but definitely worth doing.

Personally I think a well sorted 4k or 5k turbo with a decent amount of boost is actually quicker than a 4age.

The motors are a lot strong than what a lit of people say (typically people who have never actually turbo'd one). Provided it is well tuned, particularly the ignition side of things you can run a fair bit of boost through them. Mine runs about 16-17 psi but I regularly spike to about 22 psi - my ecu has a data logger. I just about to make some major changes to my setup and get it running about 23 psi. To be honest the fun doesn't really start until about 10 psi.

To answer so of your questions more specifically:

I don't think it would be worth trying to cut and shut the intake manifold. The port spacings would be all wrong and the injectors would be right at the end of the et runners meaning you'd have to mount them in what's left of the k manifold...then you'd need a custom fuel rail. You would be much better off trying to source a 7ke manifold off a townace.

Again with the exhaust manifold being cast iron it isn't really possible to cut and shut it. Custom made manifolds like mine can get pretty expensive, however a j-pipe setup (off a single outlet Ke70 manifold) relocating the turbo to where the battery normally sits can be done relatively easily and cheap. Just make sure its made of steam pipe not mild steel.

Depending on what Cam you are using I personally think a t25 is verging on too small for a 4k or 5k. Use it in the meantime though and you can easily swap it out for something a bit bigger with the same flanges later on, eg a t28.

The fuel system is relatively straight forward - same you would do for any efi motor swap. You'll have the fuel reg from the et too.

 

Have a look through my project thread, I'm on my third turbo setup now, now with efi. Should be able to get some ideas on how to tackle a few things cheaply and how to get a little more serious as well. ;)

Edited November 22, 2014 by Taz_Rx

[Super Jamie]

Mine runs about 16-17 psi but I regularly spike to about 22 psi - my ecu has a data logger. I just about to make some major changes to my setup and get it running about 23 psi.

 

That's surprising to hear! What have you done to your motor? Are you running anything like dished pistons with a flat-piston head, thick copper head gasket, strengthened rods, late model 4K block with extra ribbing, etc?

 

My knowledge of turbo K engines comes from the guy Shaddow's Edge on oldcorollas Yahoo Group back in the early 00s. He had a small turbo (IIRC it was the stock T2 off an ET Pulsar) on a steampipe manifold that he'd bolt to stock K engines from the wreckers and drive them until they popped. He couldn't put more than 10psi into them without shortening their lifespan to mere months.

[Taz_Rx]

When you say "shorten there life span" are we talking blow motors... Or head gaskets? Without doing something about timing you're just asking for trouble.

 

My project thread is here....

http://www.rollaclub.com/board/topic/10940-sis-5kte-ke55/page__pid__687015__st__990#entry687015

Go back to page 1 and gave a look at some of my early carby turbo kits. My original 4k was bog stock which then later got a Camtech 609 being about the only real mod. That used to cop about 12 psi daily and was only removed when I up graded to a 5k. That motor is still actually going in n/a form in my other corolla. My current 5k is essentially a stock bottom end, d dish pistons, turbo cammed, ported 4k head shaved 120 thou (compression is about 8.5:1), 7ke injection, custom exhaust manifold, ball bearing t28. That's a very brief list, check the thread for full parts list.

 

That was a few years back not long after efi was finished. Don't have the gilmer anymore.

[Super Jamie]

When you say "shorten there life span" are we talking blow motors... Or head gaskets?

That's a good question, and I don't quite remember. I know he had one throw a leg out of bed but I don't remember why other engines got replaced.

 

check the thread for full parts list.

From what I remember of Stephen's builds, he just bolted his existing manifold (T2 and blowthru SU) onto a new motor and that was it. I should ask him to tell us more if he still remembers it.