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Subject: perf-list-digest V2 #300
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perf-list-digest Sunday, November 21 1999 Volume 02 : Number 300



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Ford Truck Enthusiasts - Performance
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In this issue:

FTE Perf - exhaust
FTE Perf - Shocks
Re: FTE Perf - exhaust
Re: FTE Perf - Shocks
Re: FTE Perf - Shocks
FTE Perf - Date: Fri, 19 Nov 1999 10:28:46 -0600
Re: FTE Perf - exhaust

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Date: Sat, 20 Nov 1999 07:42:02 EST
From: Blkharswed AOL.COM
Subject: FTE Perf - exhaust

I think i need help and you guys seem to know your stuff. I have a '90 F-150
4X4 with a 300ci (4.9),K&N filter charger, Jacob's Omni Magnun, syntetic oil
and electric fan. When I put a Flowmaster cat back system (3" pipes) I seemed
to lose low end torque. Is this possible or has my imagination out whack? I
would also appreciate advice on how to get shop manuals (prefferably with
pictures) to help me out. I don't want to make the same mistake with a 5.0
i'm working on and i don't like that Mazda tranny in there. lot's of people
tell where to go but don't give me directions.
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Date: Sat, 20 Nov 1999 09:06:41 -0600
From: "Joel Thomas"
Subject: FTE Perf - Shocks

I have dual front shock on my 84 F-150
can I take one shock out to make it ride better?
and which one should i take front or rear on the front??
thanks
right now it rides real stiff and i have ridden in one shock 4x4's like mine
and they ride much better..
any help?

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Date: Sat, 20 Nov 1999 10:20:42 EST
From: FLR150 AOL.COM
Subject: Re: FTE Perf - exhaust

On any small Ford motor, they like to have a little backpressure. 3" is
pretty big for that motor. I am running an over 300 hp 5.0 and I only have
2.5" pipes.
Later
Wayne Foy
'94 Flareside SC
#2 Top Truck
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Date: Sat, 20 Nov 1999 07:39:07 -0800
From: Adam McLaughlin
Subject: Re: FTE Perf - Shocks

What?! One shock made it better?

I have a 1988 BII, with 3" JD VR coil lift. I originally didn't have the dual
front shock hoops on when I installed the lift, but now that I have a little
more money, I spent the $270 to buy the dual mount hoops and shocks. After
installing them, my ride did smooth out considerably. I felt that the Warn
XDi-9000 hanging off of the front bumper was great leverage to swing the front
end around. The dual shock setup made this dissapear..

Good luck,

Adam

Joel Thomas wrote:

> I have dual front shock on my 84 F-150
> can I take one shock out to make it ride better?
> and which one should i take front or rear on the front??
> thanks
> right now it rides real stiff and i have ridden in one shock 4x4's like mine
> and they ride much better..
> any help?
>

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------------------------------

Date: Sat, 20 Nov 1999 08:04:44 -0800
From: George Miller
Subject: Re: FTE Perf - Shocks

How many miles do you have on the existing shocks? If it's more than
25,000, I'd put new shocks on. Most owners would prefer to have the dual
shock mount.

George Miller

Joel Thomas wrote:
>
> I have dual front shock on my 84 F-150
> can I take one shock out to make it ride better?
> and which one should i take front or rear on the front??
> thanks
> right now it rides real stiff and i have ridden in one shock 4x4's like mine
> and they ride much better..
> any help?
>
> == FTE: Uns*bscribe and posting info http://www.ford-trucks.com/faq.html
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Date: Sat, 20 Nov 1999 10:37:58 -0600
From: Neal Armstrong
Subject: FTE Perf - Date: Fri, 19 Nov 1999 10:28:46 -0600

> best idle vacuum is about 14". The problem is the engine runs like
> word> and idles "best" at about 40 degrees BTC with the vacuum advance
> connected.
>

Vacuum looks good, and timing is about right, maybe a touch high ... you
need to disconnect the advance when you are checking the base timing ...

> I'm stumped, but then diagnosis isn't my strong suit! Seems to me to be
> a cam problem, but 40 degrees is a long way from the normal 10 or 12, so
> wouldn't it have to be WAY out of whack to cause this? Any suggestions??

You probably will have 10 or 12 degrees when you disconnect the advance
...
check it that way and lettuce know :)

Yes, I understand that when setting the timing to a specific number of
degrees BTC, the vacuum advance must be disconnected and plugged,
however in this case I'm just trying to find the best idle point, i.e.
highest vacuum reading. With v.a. disconnected, it drops to about 30
degrees BTC, which is still so far advanced that, when starting it, the
engine is hard to turn over. This difference seems about right, as the
Accel literature indicates the v.a. is worth about 7 degrees distributor
/ 14 degrees engine at 12" (this is adjustable on this unit). Also, the
connection to the v.a. is through the "tree" and to the non-ported
connection on the carb.

Thanks,
Neal
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------------------------------

Date: Sat, 20 Nov 1999 19:13:19 -0600
From: Neal Armstrong
Subject: Re: FTE Perf - exhaust

I had the same experience with an '88 F150 4.9L, and there have been posts to
this list in the past discussing this subject. Opinions differ, but based on
personal experience and the reports of others, it sure seems like the EFI version
of the 4.9L needs more backpressure to operate efficiently at the low end than
the 5.0L, for example. I think you will have better results with the 5.0L
presuming you purchase an "engineered" (cat-back) system from someone like
Flowmaster or one of the other major manufacturers, as opposed to having the
local muffler shop design one. I think I remember that Flowmaster's web page has
a chart showing suggested exhaust system pipe sizes based upon the engine HP.

Agree on the Mazda tranny also. I sold mine with 130K on it, and hated that
trans the whole ten years I had the truck.

Shop manuals are available from Helm, Inc. at www.helminc.com. Pictures are not
all that plentiful in Ford shop manuals, but if you check out a good bookstore,
you will find a lot of books with illustrations and pictures to suppliment the
shop manual.

Blkharswed AOL.COM wrote:

> I think i need help and you guys seem to know your stuff. I have a '90 F-150
> 4X4 with a 300ci (4.9),K&N filter charger, Jacob's Omni Magnun, syntetic oil
> and electric fan. When I put a Flowmaster cat back system (3" pipes) I seemed
> to lose low end torque. Is this possible or has my imagination out whack? I
> would also appreciate advice on how to get shop manuals (prefferably with
> pictures) to help me out. I don't want to make the same mistake with a 5.0
> i'm working on and i don't like that Mazda tranny in there. lot's of people
> tell where to go but don't give me directions.
> == FTE: Uns*bscribe and posting info http://www.ford-trucks.com/faq.html



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------------------------------

End of perf-list-digest V2 #300....

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