nickk
08-10-2013, 04:58 PM
Ok guys,
I'm not a D-series guy but after working on some more powerful Hondas I thought I might as well own one for the fact that they are easier and cheaper to experiment with, especially when you break stuff.
So I bought someones unfinished project, its an absolute piece of engineering history.
D15B4 Dual carb with a turbo plumbed straight to a custom made plenum with no intercooler.
I'm sure some of you guys have seen people attempt this....
Anyway...
I've stripped the emission controls, the carb is rejetted and I have a colder range of plugs and have finally got it running.
I'm only 2 rotations away on the carbies before I lean them out but I'm still just dumping unburnt fuel when I try to take off and get some load on the engine.
Now... Timing is set slightly more advanced than stock at the moment.
My question is, as I add boost under load, should I be wanting to retard timing and add fuel?
For reference I got the car with the timing completely retarded and the fuel mixture screws out about 10 turns. So as I said above, its 2 turns before being completely lean and a little more advanced than the standard timing.
If anyone is really smart... please tell me which vac advance line should be plumbed where. If I plumb one straight to the manifold like in the workshop manual, what should I do with the other line because there is no black box?
Now no stupid comments about wasting my time, I didn't do this turbo conversion myself, I only bought it because it was so cheap and it seems like its so close to running.
I'm not a D-series guy but after working on some more powerful Hondas I thought I might as well own one for the fact that they are easier and cheaper to experiment with, especially when you break stuff.
So I bought someones unfinished project, its an absolute piece of engineering history.
D15B4 Dual carb with a turbo plumbed straight to a custom made plenum with no intercooler.
I'm sure some of you guys have seen people attempt this....
Anyway...
I've stripped the emission controls, the carb is rejetted and I have a colder range of plugs and have finally got it running.
I'm only 2 rotations away on the carbies before I lean them out but I'm still just dumping unburnt fuel when I try to take off and get some load on the engine.
Now... Timing is set slightly more advanced than stock at the moment.
My question is, as I add boost under load, should I be wanting to retard timing and add fuel?
For reference I got the car with the timing completely retarded and the fuel mixture screws out about 10 turns. So as I said above, its 2 turns before being completely lean and a little more advanced than the standard timing.
If anyone is really smart... please tell me which vac advance line should be plumbed where. If I plumb one straight to the manifold like in the workshop manual, what should I do with the other line because there is no black box?
Now no stupid comments about wasting my time, I didn't do this turbo conversion myself, I only bought it because it was so cheap and it seems like its so close to running.