turbo SN95 with no tune? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 22 Old 08-31-2009, 09:25 PM Thread Starter
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turbo SN95 with no tune?

Has anyone ran an SN95 (5.0) with no tune (SCT, twEECer etc)? I've read about plenty of people doing it with fox body mustangs, but not SN95s. I have a wideband, so I can monitor the A/F. Other than locking out the timing and having injectors that match the MAF, is there anything else? Im not looking to run it like that for long, but just until I can get a tune.

Brian


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post #2 of 22 Old 09-01-2009, 02:33 AM
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My 95 doesn't have a tune on it and see's 12lbs of boost. It's been that way for almost 6 months

Timing is locked out at 20* with the spout out and the O2 sensors are unplugged.

See's 14:1 to 13.8:1 while cruising and 11.2-11.5:1 at WOT.


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"Just turn the boost up.....it's only air."
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post #3 of 22 Old 09-01-2009, 12:51 PM
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Quote:
Originally Posted by RED95GTCOUPE View Post
Has anyone ran an SN95 (5.0) with no tune (SCT, twEECer etc)? I've read about plenty of people doing it with fox body mustangs, but not SN95s. I have a wideband, so I can monitor the A/F. Other than locking out the timing and having injectors that match the MAF, is there anything else? Im not looking to run it like that for long, but just until I can get a tune.

Brian
Not to hijack your thread but I am wondering the same thing. I just finished my build and I am having problems getting the thing to run right. Is there a trick or somthing. What setup is anyone running. What products are you running, IE mass air meter, injectors size, timing????? This is a great Thread

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1994 GT/Fobra/ Laser Red w/ CHP 306ci shortblock, GT-40x heads/Trick Flow intake/1.7 rollers/ 42's#/ Steeda #19 Cam/Cartech T-64 Turbo kit
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WTB: 1994/1995 GT or Cobra.
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post #4 of 22 Old 09-01-2009, 08:36 PM
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mine needed tuning it was running a little too fat causing it to have a surging to stall idle at times and fowling plugs but a trip to the tuners with a diablo chip and it was all straightened out in a few hours as far as a drive ability until the next day when we did dyno tuning to get it dialed in power wise.could have been the C&L 76mm MAF sensor i was running cause it was almost pegged out on the dyno as far as voltage. tuner also told me that the sn95's have built in MAPS in the computer where there 93- dont which is why the fox bodies are a little more mod friendly..

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95 Mustang-Let's just say it's a stock 302 with some bolt on's who really needs all the details
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post #5 of 22 Old 09-02-2009, 12:08 AM
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Originally Posted by stangkrew94 View Post
Not to hijack your thread but I am wondering the same thing. I just finished my build and I am having problems getting the thing to run right. Is there a trick or somthing. What setup is anyone running. What products are you running, IE mass air meter, injectors size, timing????? This is a great Thread

What types of problems are you having? What mods?

1987 Saleen clone: 358cid, FoxLake Vic Jr's, Victor 5.0, YSi, etc, etc, etc
809rwhp on pump gas + meth injection
"Just turn the boost up.....it's only air."
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post #6 of 22 Old 09-07-2009, 01:51 AM
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Stock Block 5.0, Heads Cam systemax intake 219 lpg pump

single T70 Turbo 8~psi boost pmas cal for 42# injectors no tune timing at 10* base timing

11:2 WOT Air/fuel Daily driven
I have no problems with drivability, other than sometimes ill get surge or a stall once in a greta while ( might have a vack leak..)

Now, I was once told by a tuner to lock timing at 18* ( pull spout out and leave it out) what would be the difference between locking it and leaving it to stock 10* base ? what are the advantages to each ?

and Why did tireburner unplug o2 sensors ? I have mine hooked up.....

Last edited by psychotuner; 09-07-2009 at 01:54 AM.
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post #7 of 22 Old 09-07-2009, 12:39 PM
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Why did tireburner unplug o2 sensors ? I have mine hooked up.....



I had one of them unplugged because I had my wideband in the downpipe. It would try to correct itself out and go lean. So I unplugged the other one.


Unplugging the O2's forces the computer into open loop mode and it reads off the maf all the time like it does at WOT.

1987 Saleen clone: 358cid, FoxLake Vic Jr's, Victor 5.0, YSi, etc, etc, etc
809rwhp on pump gas + meth injection
"Just turn the boost up.....it's only air."
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post #8 of 22 Old 09-07-2009, 01:16 PM
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I have my wideband into the downpipe. I have both of the stock o2's on the crossover pipe. So I need to unplug them?
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post #9 of 22 Old 09-07-2009, 03:45 PM
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I have my wideband into the downpipe. I have both of the stock o2's on the crossover pipe. So I need to unplug them?


You won't get an accurate reading off of the O2's in that location. I would weld two bungs into into the downpipe and install them there.

1987 Saleen clone: 358cid, FoxLake Vic Jr's, Victor 5.0, YSi, etc, etc, etc
809rwhp on pump gas + meth injection
"Just turn the boost up.....it's only air."
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post #10 of 22 Old 09-07-2009, 04:39 PM
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Why not, the factory uses them there ?

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post #11 of 22 Old 09-07-2009, 06:01 PM
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if the timing is locked (spout out) at 18* the only draw back could be that it will start hard when hot. If you leave the spout in and the timing at 10* the timing will go up to 30-36* witch is bad under boost. I would go with 20* but you need to watch the a/f .

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post #12 of 22 Old 09-07-2009, 09:35 PM
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Why not, the factory uses them there ?


The factory didn't put a turbocharger on the car either.

1987 Saleen clone: 358cid, FoxLake Vic Jr's, Victor 5.0, YSi, etc, etc, etc
809rwhp on pump gas + meth injection
"Just turn the boost up.....it's only air."
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post #13 of 22 Old 09-07-2009, 11:19 PM
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My car ran horribly without a tune. I have matching injectors and everything but it just would not idle before the tune. Not to mention I had to jack the fuel pressure up like crazy just to feel safe on the drive down to the tune shop.

Of course after the tune it idles like a champ holding at about 750rpm. I see 14.0-14.2 cruising and 11.0-11.5 at WOT.

I run a PMAS and 60lb injectors. With a sct chip and switch between 9 and 13lbs depending on the car next to me or when I think I need more power.

1995 Cobra white/tan and a T64
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post #14 of 22 Old 09-07-2009, 11:24 PM
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myself and 2 other stangs have our timing set at factory 10* and under boost is clean, no pinging or detonation, air/fuel @ 11:0 the timing with 10* base is more like 26 total


Likle I said, other than the car cold idle surge and ocassionally stalling, the car runs and drives great with just 42's and matching Pmas MAF sensor in a straight 3" pipe.

what are you guys setting your fuel pressure to ?
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post #15 of 22 Old 08-20-2010, 12:14 PM
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Originally Posted by psychotuner View Post
myself and 2 other stangs have our timing set at factory 10* and under boost is clean, no pinging or detonation, air/fuel @ 11:0 the timing with 10* base is more like 26 total


Likle I said, other than the car cold idle surge and ocassionally stalling, the car runs and drives great with just 42's and matching Pmas MAF sensor in a straight 3" pipe.

what are you guys setting your fuel pressure to ?
Bad idea
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post #16 of 22 Old 08-20-2010, 12:18 PM
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I've done it.

95 GT, Trickflow top end kit, 254,000 mile shortblock....custom turbo kit with 67mm turbo.

Car made 480 rwhp, on 8-10psi IIRC.... smoke like crazy....but ran great for a long time. went 11.2's.

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post #17 of 22 Old 08-20-2010, 09:54 PM
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I just got my 95 to fire up with a fresh stock motor and turbo. No tune, locked the timing at 20* and turned down the fuel pressure a little. My question is what would be a "good" starting point for the fuel pressure to be at? I'm going to get a tune but didn't want to flood out the plugs and wash down the cylinders.

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post #18 of 22 Old 08-22-2010, 04:08 AM
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Devaroh, mine is at 40#, vacuum line unplugged, is a good starting point
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post #19 of 22 Old 08-22-2010, 11:57 AM
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Devaroh, mine is at 40#, vacuum line unplugged, is a good starting point
That's what I was thinking but with 60lb'ers and no tune, was thinking that might be too much fuel. Guess it's still a good starting point

1995 Mustang GT 5.0
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post #20 of 22 Old 08-22-2010, 09:32 PM
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I've done it.

95 GT, Trickflow top end kit, 254,000 mile shortblock....custom turbo kit with 67mm turbo.

Car made 480 rwhp, on 8-10psi IIRC.... smoke like crazy....but ran great for a long time. went 11.2's.
probably would have went 10s with a tune on it , just cause the car runs doesnt mean its ok
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post #21 of 22 Old 01-21-2011, 07:47 PM
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im having trouble with this on mine to i have a dss 308 with ported 289 heads it ran for about a day and a half and i cant get it to fire off. when it was running it was crazy rich.

We are running no o2`s, timing locked at 18, fuel pressure at 35w/vac i also have msd 6al
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post #22 of 22 Old 02-18-2013, 07:34 AM
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Ok, if i use vortech S/C with FMU stock maf and injectors
Do i still need disconnect o2 plug and set timing locked 18 and always drive with spout out if i want drive without tune? I use wideband for checking A/F ratio

Last edited by Olli0; 02-18-2013 at 07:39 AM.
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