WHICH FUEL INJECTORS TO USE WITH A 2.8 TO 3.4 CONVERSION (Page 4/4)
zkhennings APR 07, 10:07 AM
You could install an adjustable fuel pressure regulator, Aeromotive makes good ones. Turn your fuel pressure down before going for your emissions check. Has the benefit of helping you dial in your fueling if you aren't going to be tuning the computer. You will need to plug the return on the fuel line, or set it up to be dual feed as the aftermarket regulator will have the return line coming directly out of it.

edit to say I didn't see that you had left Cali but still would be a worthwhile mod even with an aftermarket ECU. The fuel pressures are rock solid and it is easily rebuildable for under $30.

[This message has been edited by zkhennings (edited 04-07-2021).]

Coolkoolpyle APR 12, 12:43 AM
In all reality the only real emissions equipment you need is the cat.
I run a Holley sniper with no emission equipment except the cat and I not only have far more power but I also sail right thru emissions.

Fact is emission is ultimately a product of tune

If your system is metering truly proper air fuel and has a well controlled spark it will run fairly clean

With the cat working properly your emissions will be quite low

The egr system does very little to lower emission output and just dilutes the air fuel mixture with hot exhaust gasses
99% of which goes out the tailpipe any way.

It’s a very poor controler of emissions. And a complete waste of fuel as you just need to use more pedal to get going because of the contaminated charge going in the engine.

You can have your distributor set up to run thru the sniper system with a good CD box and the computer will also control your spark advance so well that alone cleans up a notable percentage of your emissions.

Use a factory looking air filter type assembly
The non polished throttle body and make it look fairly stock.
The sniper allows for a efficiency setting that’s quite fuel thrifty.
Swap back to performance after the test.
Takes less than two minutes.

Been thru twice now

No one said a word and I was burning clean with a significant boost in power.
In fact it’s so clean I’m considering a mild cam upgrade.

Best 1000 bucks I ever spent.

[This message has been edited by Coolkoolpyle (edited 04-12-2021).]

Notorio APR 12, 11:34 PM

quote
Originally posted by armos:

... My plan was to build an adapter harness so I could easily swap back to the stock 7170 ECM for emissions test day. That's a little insane since the emissions are probably better with the 7730, but it's California.
I never did the project, it's still on the "to-do" list. Now that I'm out I don't need to worry about testing anymore, but I think I'll still build an adapter harness to start with.




Please do let us know when you make the adapter harness and how it works out.