94 stroker, solving idle problems?

T

Tonyu47

New Member

Jun 28, 2007

3

0

1

Albuquerque NM

Mar 5, 2010

#1

• Mar 5, 2010

• #1

Hey guys,

I want to swap a 331 for my 94 cobra engine, has anyone seen a stroker sorted out for stable idle, etc. with a J4J1 computer?

I plan to build it with AFR 185 60cc heads, Fordstrokers 331 short block, tmoss GT40 lower, and a custom grind from Compcams. I already have a quarterhorse in it and LC-1. Any advice on who or where to get idle tuning info particular to the 94/95 computers would be greatly appreciated.

thanks,

TonyL

 

Bosko5.0

Active Member

May 18, 2006

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longwood, FL

Mar 7, 2010

#2

• Mar 7, 2010

• #2

Any tuning shop should be able to get you a nice idle.

 

BlackVert

15 Year Member

Oct 3, 2003

5,589

9

98

Bethesda, MD

Mar 7, 2010

#3

• Mar 7, 2010

• #3

of course a stroker can have a good idle. mine idles nicely at 700 with lots of lope. it is all in the tune.

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

Mar 7, 2010

#4

• Mar 7, 2010

• #4

I'll hit the high spots
but
You'll need to fill in the blanks with your own research

A good place to do it is here with a search
but
You will have to go back as far as 2 to 3 years ago

We were way more active with all the tuning stuff back then :Word:

Another place for tuning info is eectuning.org

First thing is to get a suitable meter and a transfer curve loaded for it

Then raise your idle to 900 rpm to start out with

Next I would start off adding about 15% to idle values such as
Throttle Body Airflow
Neutral Idle Airflow
also ... See what peeps are using for ISC Duty Cycle these days

That should get you started

Grady

 

T

Tonyu47

New Member

Jun 28, 2007

3

0

1

Albuquerque NM

Mar 7, 2010

#5

• Mar 7, 2010

• #5

thanks guys

My engine builder said it wouldn't idle right with a 94 PCM, which I didn't think was entirely true, but meant I needed to get some advice from folks who had gotten it to work.

Thanks for the feedback. I have searched the old posts but did not find too many details specific to strokers. Now I have a better picture and some leads on tuning shops if tuning myself does not work out [thanks Kurt].

cheers,

TonyL

 

ProKiller

Founding Member

Apr 26, 2002

3,064

15

78

PA

Mar 8, 2010

#6

• Mar 8, 2010

• #6

it won't idle good right out of the gate no. The cam specs should be more your concern not the fact that it is a stroker.

 

95riosnake

Member

Dec 21, 2003

630

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Pittsburgh, PA

Mar 8, 2010

#7

• Mar 8, 2010

• #7

Get an SCT 4 bank chip and have it tuned on a dyno and it will be fine. Make sure to use a good quality mass air meter, I used a C&L and regret it, I'm going with a lightning maf this time around (on a 347) which will give me a nice 800-900 rpm idle with no surging or hanging idle.

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

Mar 8, 2010

#8

• Mar 8, 2010

• #8

Tonyu47 said:

My engine builder said it wouldn't idle right with a 94 PCM, which I didn't think was entirely true, but meant I needed to get some advice from folks who had gotten it to work.

Thanks for the feedback. I have searched the old posts but did not find too many details specific to strokers. Now I have a better picture and some leads on tuning shops if tuning myself does not work out [thanks Kurt].

cheers,

TonyL

Click to expand...

Hello Tony

Stroker or Not ... as far as idle issues ............

The principles are gonna be the same
so
Any info on a h\c\i combo will be applicable to your concerns

:Word: You D O N ' T want your engine builder tuning for you :Word:

Grady

 

2

2002BLGT

Well-Known Member

Dec 18, 2003

2,945

4

59

Bedford VA

Mar 8, 2010

#9

• Mar 8, 2010

• #9

what maf and injectors are you going to run ?

 

T

Tonyu47

New Member

Jun 28, 2007

3

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1

Albuquerque NM

Mar 9, 2010

#10

• Mar 9, 2010

• #10

I have 24# now with the stock cobra MAF. I don't have room for a bigger MAF so the intake track up to the TB is what it is for now. I am getting a 70mm TB and a Tmoss ported GT40 lower. I have some 30# injectors I can use if I am maxing out the 24's.

I think my cam will turn out close to a Compcams XE264HR [#35-320-8] as camquest6 seems to pick that one for many of the combinations I tried:
0.544 lift
212 I 218 E duration at 0.050
112 lobe centers

I have found lots of info on calibrating MAF transfer functions and injector slopes so I am not too concerned about dialing them in, but idle tuning is a bit more complicated so I am more concerned about getting a good understanding of it.

cheers,

TonyL

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

Mar 9, 2010

#11

• Mar 9, 2010

• #11

You most likely already know this but

The first thing you wanna do is load in your additional cubic inches :Word:

That will change your load factors and you would not wanna do a bunch
of tuning and then plug in your values for the larger motor cause then
the tuning you did for OEM motor size would not be accurate

Grady