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Old 07-06-2006, 05:09 AM   #1
QWKSNKE
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vristang.... question about your post on stangnet

I saw this..

Quote:
Originally Posted by vristang at another site
5. Change Injector High/Low Slopes per TwEECer Manual. If using a 190/255lph pump, or using Cobra ecu, then set both same
This is the first time I have seen this statement used. Why do you recommend this?
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Old 07-06-2006, 12:42 PM   #2
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Re: vristang.... question about your post on stangnet

Quote:
Originally Posted by QWKSNKE
I saw this..



This is the first time I have seen this statement used. Why do you recommend this?
I think I had read that in the Tweecer manual.
For some reason the Cobra .bins seem to use the same slopes.

I started my X3Z tune this way and it seemed pretty close, but I did need to make some adjustments.
That is about all the detail I can offer on that.

Keep in mind that the initial slope settings are going to be rough anyway. KAMRF based adjustments will probably need to be made regardless.

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Old 07-06-2006, 01:29 PM   #3
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Re: vristang.... question about your post on stangnet

yeah I knew that the x3z OEM settings were that way. Just wondered if you had confirmed that all x3z injector slopes should be set that way when modifying
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Old 07-06-2006, 01:35 PM   #4
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Re: vristang.... question about your post on stangnet

Also, I'm curious as to why you would put the fuel pump size stipulation in there.
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Old 07-06-2006, 02:41 PM   #5
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Re: vristang.... question about your post on stangnet

x2
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Old 07-06-2006, 04:20 PM   #6
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Re: vristang.... question about your post on stangnet

The pump thing (I've seen that recommended somewhere else on the web - I think that's where he got that from) may be related to how I've had to cut way back on my fuel up top after installing my BAP. OTOH, I am now wondering if they were referencing a returnless system WRT the pump sizing? Anyway, these are the thoughts that popped into my head reading this.
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Old 07-06-2006, 06:01 PM   #7
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Re: vristang.... question about your post on stangnet

I just pulled up the ZAO .bin for the 95 Cobra R.
Both slopes are set to 24lb.

I just looked at the Tweecer manual, and that said nothing about setting the slopes the same.

Does anyone know what size fuel pumps the 93 Cobra and 95 Cobra R came with?

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Old 07-06-2006, 06:09 PM   #8
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Re: vristang.... question about your post on stangnet

Don't know about the 95 r but the 93 came with the same pump as the standard 5.0's (88lph)
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Old 07-06-2006, 06:19 PM   #9
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Re: vristang.... question about your post on stangnet

Well I guess the pump stipulation didn't come from the Cobras then.

I fear that I won't be able to quote a source, since I didn't start keeping track of most info until a few weeks into my research.

I am glad to hear Cougar5.0 say that he has seen this mentioned before. If I am crazy then atleast I'm not crazy and alone.

I am using the X3Z, 30lb injectors, and have both slopes set to 30.5.
My KAMRFs seem happy with that.

I'll look some more and see what I can find.

Something I had not considered until just now is the way the A9* series uses the Injector Breakpoint. Maybe this has something to do with it?

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Forged Bottom End / Gapless Rings / CR 8.85:1 / Custom Cam / Ported Trick Flow Heads / Comp Cam Upr / Lightning Lwr
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Old 07-06-2006, 06:23 PM   #10
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Re: vristang.... question about your post on stangnet

Also, I have heard mention that when using larger fuel pumps (190 and 255lph) the stock regulator can have trouble maintaining a fuel pressure setting.

The thought is that the pumps are too strong for the regulator to maintain control.

This may explain the fuel pump recommendation.

jason

EDIT; Qwksnke - Are you using a Tweecer with your x3z?
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Check out my new Mustang website! - Including: TwEECer, EEC-IV, C&L, 351w Fox Swaps, PCV Oil Control, and more.

1990 GT - 408w - 17mpg
TwEECer RT 1.30A10 - X3Z - A9L strat. / EA
Forged Bottom End / Gapless Rings / CR 8.85:1 / Custom Cam / Ported Trick Flow Heads / Comp Cam Upr / Lightning Lwr
17x9 Cobras / Front 255s / Rear 275s / 5 Lug Cobra Disc Conversion / Auburn Ltd. Slip / 3.27 / 31 spline axles / Panhard Rod / Upr&Lwr Control Arms

1987 Red LX - 2.3L - Planning 2.3t Converison
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