Tech issue!
Wild theory time.
778 Injectors flow approx 230cc @ 82% duty cycle (stock 98 siemens pintle
style injector) Magnetic cicuit saturates @ 82% or so. Saturation never
occurs with the stock SBEC But appears to occur with the JETII module
combined with a 700+cfm TB... without discussing F/A (I dont really know
where it should be on these motors) It seems that dodge has put a cap on the
PW freq and duration.
If VE is O.K for desired HP,(modified/new manifolds) then a bigger injector
"should" avoid the saturation cap on PW freq and duration and provide necc.
fuel for proper F/A as dictated by SBEC...Sierto?
BUT just say the dyno results show a lean mixture and minimal HP gains
(just a hypothetical situation mind you)
Since no fuel pressure regulation is going on, the pressure must be sagging
due to extra demand?? SBEC knows and compensates by upping the freq and
duration of the pulse.
IF the engineers were thrifty (modern mopar engineers seem to be the sort)
then the fuel pump is a minimalist device barely capable of making the stock
grade (a guess) so it tops out the SBEC PW table still and no HP gain... A
collision of curves if you will.
There, Ive said it, now rip it up...
BKB
-----Original Message-----
From: Jules Glogovcsan [mailto:jghunter@nol.com]
Sent: Friday, October 23, 1998 9:32 AM
To: dakota-truck@buffnet.net
Subject: DML: Re: RE: Question For Jules,Frank,Bruce,...who ever
----------
> From: Mok, Alan (SPB Brentwood) <AMok@spbank.com>
> To: dakota-truck@buffnet.net
> Subject: DML: RE: Question For Jules,Frank,Bruce,...who ever
> Date: Friday, October 23, 1998 10:22 AM
>
> Finally, a good tech question!
>
> I've always wondered where the most restrictive part of the intake path
> for a 360 is. If your intake manifold can only flow so much then
> installing a sewer pipe size throttle body won't net any gains.
. Private, Free Email at http://www.hotmail.com
true... but the dml tbis aren't THAT big... but you're right... pull off
your steel manifld plate and see plenum divider... about 3/8 to 1/2
clearance.... we rip it right on down for max effort manifolds when m1s are
not the missing link...
jman
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:10:45 EDT