Re: Injectors Types

Joe Grubbs (jsgrubbs@ipass.net)
Fri, 07 Aug 1998 01:21:32 -0400

Jim Lill wrote:
>
>
> Per the N9T/N9TE/N9TEA combined workshop manual
>
> N9T 1984.33 / 0 280 150 255
>
> N9TE 1984.36 / 0 280 150 802
>
> N9TEA 1984.26 / 0 280 150 200
>
> Per the recent Peugeot Quick Ref Manual the N9TE and N9TEA use the same
>
> Per the Bosch Injection Catalog, the N9TE and N9TEA use the same
>
> Juha's Bosch Injector Page (http://www.co.jyu.fi/~rax/suutin.htm) lists
> the "200" as 300 cc/min flow and the "802" as 284 cc/min. The "255" is not
> listed. It does list the "804" for the Peugeot 505T, probably euro-spec,
> and it has a 337 cc/min flow.
>
> So what should a N9TEA use and could a "804" be used in a high boost
> application?
>

Sol's original N9TEA had the 200 injectors. The '86 motor now in
his car uses the 802 injectors. We plan transplant his original
200 injectors into the replacement engine. The problem is that
the N9TEA inj ECU (in his car) is calibrated for use with
the 200 injectors. We hope this will cure the problems we
have had setting his fuel mixture.

I think the 804 injectors should only be used with the corresponding
ECU. Otherwise a rising-rate fuel pressure regulator should be
more than enough for dealing with high boost pressures.

> Note also that the N9TE and TEA use 2.5 bar pres. reg. whereas the N9T is
> a 3 bar reg.

I have yet to figure this one out--there must be some sort of
advantage to using higher-flow injectors with lower fuel pressure...

> On a related noted, what is the thread of the pres. reg. to fuel rail
> interface??

It is an o-ring type press fit (similar to the injectors). The
regulator itself is bolted (with its with flanges) to the
body of the fuel rail.

Joe