18 replies to this topic

[rodomo]

I would assume (and believe I have read somewhere) that black or EFI motors have the good rods. Correct me if I am wrong as I would like to know.

RACV MAN (Fitting a black to his LJ)

[Heath]

They also have the counterweighted crank.

EDIT: To actually answer your question, keep the standard induction. I'd consider some aftermarket pistons, suitable but tame cam and maybe a Performance Chip if you feel it's necessary once it's all on the road... i imagine they're readily availible for black EFI motors.

The bottom end should really be alright as is.

Edited by Heath, 31 March 2006 - 11:36 PM.

[Heath]

There are other options... larger valves? Roller Rockers? you can do anything you want to a Holden six, but I wouldn't say induction is anywhere near your highest priority.

You could always save the $800 towards something else: $500 more towards the paintjob, $300 towards the tyres, for example.

[rodomo]

you cant "chip" vk efi computers you need a whole new computer such as a motec

This is a reply with not a huge deal of reliable back-up but didn't those puters have a changeable memory calibration unit? I am not sure. I remember when they first came out something from Petro-Jet having a fiddle (they were babies then too). Maybe a RB30 turbo Skyline memcal? (Something in my memory banks says it may be same puter) Don't quote me, more like food for thought.

RACV MAN

[Dangerous]

Rodomo, the VK efi computers are a very simple unprogrammable analog open loop device, and they don't have memcals - not like VL onwards Commys.

Postal - you have two options that will work well.

Number one is to keep the EFI 202 dead stock, even if you rebuild it. These engines were pretty good in their time, having very similar torque and HP outputs to a stock 253. The head, inlet, exhaust and computer are all designed to work together in the same rev range, and it's doubtful that you'll actually get more power by changing things like cam, compression, valve size etc without getting very lucky, or spending some serious $$ and time by trying out combinations.

Option 2 is to modify the engine, and use either a later AC Delco computer (eg VN V6), or Motec or something similar to run the fuel injection side of things. Personally, I'd go the AC Delco computer, as it's cheap, good and reliable. I know of someone has used this setup in an LC Torana in Adelaide, and apart from a cold start issue, from memory he's pretty happy with the outcome. I think there's someone on this forum that's done it as well, but I may be wrong.

[Dangerous]

but if i upgrade the computer to say the delco option, will this basically enable me to change and modify everything else???

thanks for the imput guys, much apreciated
cheers michael.

Yes, because the AC Delco ecu is a programmable engine managment system. You can program all of its functions to suit the motor that you build or modify. You will have to pay a good dyno operator to start off with a base program and then tune it to the engien on a dyno though. Expensive, but well worth it. A stock AC Delco ecu would not be caable of running an efi 202.

[J-Rod]

A stock AC Delco ecu would not be caable of running an efi 202.

A friend of mine has had his 202 LJ running on a delco 808 with std VN v6 Memcal for a few years now.. Its possible with a stock memcal but it is a long long way from the ideal setup.