How to convert a 202 to Delco

[Rock_Lobster]

Are those Sonic Injection TB's ? Nice.

Rock Lob

[ITB202]

No they are called ultraflow. Very rare setup and info on them is scarce. Hope they work ok.

[Holden202T]

I agree with delcowizzid, or even three hoses to a 4 way T block then plug the 3 in plus the map sensor.

only issue I can see with those manifolds is they look like REALLY short runners, I guess it all depends where you want to make your power! that said, im sure they'll shit all over the VK EFI manifold no matter what!!

I've always wanted to try a set of 48mm DCOE style throttle bodys on my motor, just to see how well they go over the VK manifold plus they look shmick as!

[ITB202]

Most 202's built well with tripple webers have a runner length of 12" plus the ram tube approx 14 inch.
They are making max torque around 5500 to 5800.
This said im hoping with my short runners approx 10 to 11 inch i can make torque to 6500.
Will be a pretty bent engine im building. i think im going to go down the wolf v500 path for ecu.
My local tuner is a dealer and he is a 20yr drag racer.
Thanks for the info guys.

[stevemc32]

So I'm about to swap over my locked distributor but not sure how to make sure it's lined up properly. Should I just place it using the same orientation as the one coming out or is there more to it?

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[antus]

there may be a better way? but i'd mark the position of the balancer, the rotor, and the orientation of the distributor before you pull it out so you have a reference to where everything was when you started and then swap the replacement in with the same alignment. And when you first get the delco on it put it in diag mode and use a timing light to check its running 10 degrees. If its not you might need to lift the distributor out far enough to move it 1 cog tooth over if its not dead on. Make a note to do this first when you can fire up the ecu.

[stevemc32]

Cheers, thanks Antus, will do.

[Holden202T]

if your referring to a locked electronic dizzy for use with camira ignition module etc, then yes it does matter where it is located.

the best method is to get the motor on TDC #1 firing before you remove the dizzy - now if your balancer happens to be in the right spot and the mark actually lines up with TDC then you can rotate the motor so the mark is on 10 degrees advanced.

then when the new dizzy goes in you need to have the mark on the base in line with the rotor button. this should then get you pretty darn close to the 10 degrees base timing.... once running then you can put it in diag mode and use a timing light to fine tune to 10 deg.

if your balancer is in the wrong spot which is quite common, you can use a modified spark plug etc to work out the actual mark and then re-mark the balancer to get the dizzy right.

alternatively, i THINK i can see the mark on the old dizzy base just near the middle of the vacuum advance module, rotate the motor so that the rotor button is pointing directly at that, then when you put the other dizzy in make sure the rotor lines up with the same mark and you should be pretty well in the same location as the timing you had before, which again should be close enough for a start.

[stevemc32]

Thanks Holden202T great info, we'll see how I go with it. Probably not ready to fire it up for another week or so.

[RedWagonVC]

Hey fellas,

I'm almost done with my 2nd delco 202 conversion but we've run into a bit of a snag.

Its a VN loom, Ecotec TB, VS 5.0 man ECM with 5.0 memcal, modified version of holden202t's base tune which ran fine on the nvram memcal. No aldl data using obd interface, no effect by shorting aldl pins on diag connector (no change to CEL and no effect on fuel/spark)

Whenever the bin is written to a memcal, the motor runs terribly and stalls, pops and shakes on throttle and is impossible to drive.

I am suspecting any combination of the following:

-the ECU is running in limp home, causing the no OBD issue, and given it is a v8 memcal the fuelling is drastically incorrect causing the running issues.

-the tune is corrupt somehow, running on memcal but OBD issue is something to do with the VN loom being wired differently to the underdash loom which is a modified VS loom for the previously I stalled motor (VS 5.0 man)

-there is some sensor error that is compensated for when running nvram, but on EPROM cannot be compensated(?)

-input other possibility here!

I cannot get onto my friend who tuned the motor, burned the EPROM and has the nvram, tuning ecu etc! So I'm in a bit of a stuck spot!

Any help would be appreciated I've bought and am waiting for delivery of a Willem EPROM programmer and UV eraser, and sent antus a pm for an nvram ECU so I can try to resolvethe problem.

If anyone on here in SE Melb does delco dyno tuning I'd be interested in having a chat

Dave