4AGE - Webbers or EFI ?

[ozhummer]

I've got my son a project car. A very original AE82 hatchback. We have a full workshop including spray booth so this is a project for him to restore to something nice and fun.

I also have a spare 4AGE and a 4AGZE hanging around (although the SC12 is in bits). Both engines are bare - block and head .. but I do have most of the hang off bits..

He is not going to have forced induction engine of any kind so think of the 4AGZE as just a 4AGE with the 7 rib block (my 4AGE is an old 3 rib version).

So... I thought about maybe rebuilding the 4AGZE block /heads and either fitting up the original EFI system from the 4AGE (I think I have a computer laying about too).. His AE82 has a carbed 4AF engine, so converting to EFI is going to be a bit of a pain - replace fuel tank, wiring harness etc... I'm prepared to do this in pursuit of reliability.. OR.. do I go for a Redline Dual DCOE Weber conversion ???? - would mean I can keep the existing fuel tank, no wiring easy?

For the rebuild we will raise compression from std of 9.4:1 to 10.5:1, I've got some spare 440 injectors too that would suit, but would prob need to run an aftermarket computer to get the AFR just right.

What are the general thoughts of you guys ????

Cheers

[oldeskewltoy]

440cc injectors WAAAY too big. mostly stock 4AGE runs 210cc

As to raising compression on a 4AGE... I agree fully. Recommend using 1990+ smallport pistons, and then run a .040" metal gasket

[SmokinSquirrel]

Does your son have a daily driver, or is this rolla going to be it?
All projects consume time and money, its whether you think its worth it that counts.
AE82, FWD? For someone learning to drive, torque steer would be a bitch.
My 2c, keep the carbied motor in the car, get it roadworthy and let your son learn the basic car before upgrading engines.
I remember on my Ps a few mates had AE82s, even the 4AF had some go.
I ask these questions to help you find an answer

[Hiro]

FYI AE82 is 4AC, not 4AF

[trdee]

personally i wouldnt go with carbs. a set of webers costs as much as an aftermarket ecu!

440s are overkill but if you have them spare and will run an aftermarket ecu then that is not a drama. if you intend on running stock ecu then use stock pistons and injectors

[knightrous]

Keith, I think you should post up some of your prior project cars to give people an understanding of your abilities

[ozhummer]

HA .... Thanks Knightrous...

Ok -so here are a couple of pics of a full restoration I did of an MR2 - this is running a very very highly modified 4AGZE - as you can see by the Dyno sheets it's got a bit more ATW power than your average bear.... This car was so ballistic to drive that I eventually rebuilt it back to totally stock out of the factory....

[ozhummer]

How do you attach pictures ??

[trdee]

need to host them offsite like on photobucket/imgur etc

not doubting your skills, but you did ask for our thoughts, and my thoughts are that carbs are not the way i would go with this build.

[ozhummer]

Fair enough - just an option I had not really thought of until I saw a few engines with them. EFI would always be better, but for a car that currently carb, I was looking for an easy way of putting a 4age into it. I have had dual webers before in Alfa's and still don't think you can beat that intake noise !!!!

[knightrous]

How do you attach pictures ??

Will save you some hassles and pinched some photos from MR2Aus







https://www.youtube.com/watch?v=LO4ByfwHdfk

[oldeskewltoy]

would love to see the dyno.... Rotrex I see, any other engine details??

now knowing your skill set better... trdee makes a good point.... if you don't have the carbs, it might be far easier to set up a swirl pot, and run a feeder pump to the swirl pot, so you can run the efi. If you do have the Webers... just jet them correctly.

[ozhummer]

If I could post pictures I would but I'm getting an error when I try to upload...

Engine details (from memory) - All forged internals, TRD rods, Forged Crank, Wisco pistons, everything ARP. Kelford Cams (custom made for my application). intake was custom made with velocity stacks in plume, 90mm throttle body. Custom Air to Water intercooler by PWR, Rotrex Supercharger. External water pump, MSD LS3 independent ignition coils for each cyl. 750cc/m Injectors .. Custom clutch ..

That's about all I can remember ... It was too wild to drive, like an old Sierra Cosworth except more extreme, Power would really come on after about 5K all the way to the 8500 redline. it would spin the back wheels in all gears except 5th - in the wet.... well don't drive it in the wet!

[domma_aw11]

here's OZhummer final Dyno run

https://www.youtube.com/watch?v=LO4B...ature=youtu.be

[Paw11]

http://www.v-performance.com/products/air_fuel.html

You could give Mikuni HSRs a go.
If nothing else a 4 carb set up would look awesome - but they seem to pull the power too.
Even twin 48s might be enough for a P plater
P