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Re: re Re: 2.2 I-5 Mods
> I can support the idea that a better exhaust provides a few extra horses;
> there was a detectable improvement in acceleration over stock with my
> I doubt that the airflow restriction at the intake is more than a few
> percent of that in the exhaust, considering the different mass flows. The
> impovement here, even with cold shielding, should be minimal.
When I did this, I also swapped to an early-style airbox lid with dual inlets
('84 or '85, as I recall), deleted the cold-start flapper and all of the
ductwork, and ran additional ducting to the grill to make more cold air
available ... I guess that's more than just a K&N filter but it's cheap, easy
and effective. The airbox lid cost $5.00 and I bought a pair of VW Beetle
heater duct tubes for $2.00 for the run from the airbox to grill.
> I would be curious how you expect to change the ignition timing. AFAIK,
> NG uses a flywheel sensor to set timing in concert with the ignition ecu.
> Changing it would seem to require either an expensive mechanical revision,
> or expensive software revision. I have heard of chips claiming 10 or so
> more horses.
I don't know about NG motors but the ignition setup on my NF motor'd '87 5k
allowed me to adjust timing (after I drilled the rivet holding the protective
cover over the distributor adjustment bolt, that is) ... stock was 6 degrees
BTDC and I found it noticeably better at 12-15 degrees BTDC so long as I ran
premium gas. Adjust it too far and the knock sensors will kick in and cost