When to swap injectors

[Mike Rolica]

I'm running 24lbl ford motorsports injectors @ 50- 55 psi.  at the track
60psi.
(still some tuning needed.
The motor makes around 400hp and runs no prob.
Since my bsfc was around .44-,45 on the dyno and it made 400hp x .45=180
lb/hr
180lb/hr / 8 = 22.5 lbs/hr
most na motors are .45 or .55..
24 lbs injectors may gain you a few hp and some drivability.. since you
could run a lower press.  But
back to back testing is advised.

(remember if you increase the fp.. your flow rate changes..)

		-----Original Message-----
		From:	trax [SMTP:trax at frederickmd.com]
		Sent:	Wednesday, May 31, 2000 4:00 PM
		To:	Gmecm at Diy-Efi. Org
		Subject:	When to swap injectors

		I'm trying to figure out when you should swap injectors ...
more
		specifically, what duty cycle is considered too much and how
to determine
		your current duty cycle.

		I have a '90 IROC 350, cammed, AFR heads, TPIS MiniRam,
exhaust ... and the
		stock 22lb injectors.  I'm running around 50psi of FP and I
have modified
		the fuel tables such that I get upper 800's in the O2s at
WOT across the
		board.  Everything seems wonderful and everything is running
great.  But,
		when SHOULD you switch injectors.  Is there a magic
calculatable value that
		indicates that you should swap to a larger set of injectors?

		Tim

	
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