Is 5.0 ho stock really a dog motor - TCCoA Forums

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post #1 of 13 (permalink) Old 06-14-2017, 08:48 PM Thread Starter
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Is 5.0 ho stock really a dog motor

Not that it's a bad motor over all but some reason as nice as my 91 is the car ia just flat out slow . Granted I have eagle Gt tires which don't brake loose very well... I'm at a loss as to why a EFI 5.0ho motor that's visually been so well maintained can't burn rubber slow af !! I'm more of an auto paint detail and car audio guy by trade but some mechanic buddy's are telling me that with 5.0Ho EFI motor same for late 80s early 90s Chevy 305 EFI motors they just don't do much maybe cylinder head swap and carb the motor and it'll wake up ..being a smog motor could be the culprit
Any insight on what can be done cheap enough for now to lift the power restrictions here even if it's a few power adders and changes temporarily until I can afford to build the 351 and c4 like I plan too..
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post #2 of 13 (permalink) Old 06-14-2017, 09:10 PM
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The motor isn't that bad, it's that horrible AOD trans that makes the car such a dog. Put an M5R2 5-speed out of a supercoupe behind that 5.0, and it will be a night and day difference.

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post #3 of 13 (permalink) Old 06-14-2017, 09:15 PM
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the 3.08 rear end probably isn't helping either.
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post #4 of 13 (permalink) Old 06-14-2017, 10:00 PM Thread Starter
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Quote:
Originally Posted by MadMikeyL View Post
The motor isn't that bad, it's that horrible AOD trans that makes the car such a dog. Put an M5R2 5-speed out of a supercoupe behind that 5.0, and it will be a night and day difference.
Does anyone have a wright up on how to deal with the clutch pedal install? I read some guys use ranger pedals .... can I use the very same clutch reservoir from a Scoupe and have room to locate it on the fire wall ...? any complications or fabrication involved ...? I have a 100?s

I know can put a trans in and pressure plate and all that stuff but....
So what happens to the center council does the Scoupe short throw shifter accommodate itself right in place of the aod shifters spot with out hacking up shifting council area ...or do you have to nab the originals 5 speed center council to make it look neat?

Last edited by Trunk Monkey; 06-19-2017 at 08:47 PM. Reason: Format for easier reading
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post #5 of 13 (permalink) Old 06-15-2017, 05:24 AM
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Originally Posted by 1991 5.0 View Post
Does anyone have a right up on how to deal with the clutch pedal install i read some guys use ranger pedals ....can I use the very same clutch reservoir from a Scoupe and have room to locate it on the fire wall... any complications or fabrication involved ... I have a 100?s
I know can put a trans in and pressure plate and all that stuff but....
So what happens to the center council does the Scoupe short throw shifter accommodate itself right in place of the aod shifters spot with out hacking up shifting council area ...or do u have to nab the originals 5 speed center council to make it look neat?
All the SuperCoupe stuff fits.

And you'll either have to hack up a AOD console, or swap to the SuperCoupe console, to get the M5R2 working.

RwP

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post #6 of 13 (permalink) Old 06-15-2017, 07:38 AM
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My AOD recently rebuilt, shifts fine runs great. A couple of times I punched it on a freeway onramp and it really took off.. surprised me! Mostly though it's a sedate cruiser... 200hp isn't that much. The torque sure is nice though.
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post #7 of 13 (permalink) Old 06-15-2017, 08:00 AM
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Originally Posted by Woodman View Post
the 3.08 rear end probably isn't helping either.
At least that's an improvement over the 2.73's they put in the Fox-body 5.0 T-Birds!

Al
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post #8 of 13 (permalink) Old 06-15-2017, 12:15 PM
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Quote:
Originally Posted by 1991 5.0 View Post
Does anyone have a right up on how to deal with the clutch pedal install i read some guys use ranger pedals ....can I use the very same clutch reservoir from a Scoupe and have room to locate it on the fire wall... any complications or fabrication involved ... I have a 100?s
I know can put a trans in and pressure plate and all that stuff but....
So what happens to the center council does the Scoupe short throw shifter accommodate itself right in place of the aod shifters spot with out hacking up shifting council area ...or do u have to nab the originals 5 speed center council to make it look neat?
As far as I know, the only pedal assembly that drops in is the SuperCoupe one. Bolts right in, have to drill a hole. You can use the slave cylinder from a Ranger, but the pedal is MN-12 or nothing, and they're becoming unobtanium.

97 Thunderbird LX (The GT Bird)
2003 Explorer WAP block with Modular Head Shop "street ported" heads and Stage 2 PI NA cams, 75mm Accufab throttle body, C&L upper intake plenum, Kooks 1.75" primary/3" collector headers, 2.5" full exhaust with mid mount Magnaflow dual in/out muffler, 24lb/hr injectors, 80mm MAF, Tuning from Don @ www.lasotaracing.com, CAI that feeds from fenderwell. Jmod, 3.73:1 TL in Mark VIII carrier, Mark VIII aluminum LCAs, 93 Mark VIII driveshaft, PBR brakes (soon to be Cobras), 18x9 wheels with 35mm offset, 255/40/ZR18 Tires, Front and Rear strut/shock bracing, GR-2 shocks, Eibach 1.5" springs, 1989 SC front and rear sway bars.
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post #9 of 13 (permalink) Old 06-15-2017, 06:18 PM
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The Ford HO 5.0 is kind of a dog by today's standards where the new 5.0 Mustang motor makes 400HP.

Our old 5.0's can be modified to max out the factory computer and fuel system though. I did intake, exhaust, and went a bit further with gears.

Let the engine breathe easy with better intake and exhaust and you can max out what the computer can do with the stock 19lb fuel injectors. Taken a bit further there is the heads that pump air to the cylinders. There are Trick Flow intakes and heads that will make more power than the fuel system and computer supply without more programming or bigger injectors.

I went with a Mustang Cobra intake and kept my E7 heads and new exhaust for nice pick up in performance. I also did a rear end gear reduction which can be a straight trade of performance for fuel economy. 3.08 rear end to 3.73 was a 21% gear reduction and similar loss in highway fuel economy. It makes the old car impatient for old men and ladies in your way around town though. Rather than quietly waiting and cruising until the old folks get out of the way.

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post #10 of 13 (permalink) Old 06-16-2017, 09:01 AM
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3.73 gears and a 3000 stall converter or higher, plus a tune.

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post #11 of 13 (permalink) Old 06-17-2017, 07:09 PM
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Gears Gears Gears

As long as this isn't your daily driver, just throw some 4:10 gears in the rear end..
You're going to need that OD on the highway with those gears though..

The 5.0 MN12 were geared for MPG's, not HP's..

If you do a lot of cruising on the highway, then I wouldn't go any higher numerically than 3:73's







Rayo..

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post #12 of 13 (permalink) Old 06-19-2017, 08:18 PM Thread Starter
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Quote:
Originally Posted by MadMikeyL View Post
The motor isn't that bad, it's that horrible AOD trans that makes the car such a dog. Put an M5R2 5-speed out of a supercoupe behind that 5.0, and it will be a night and day difference.
Quote:
Originally Posted by Woodman View Post
the 3.08 rear end probably isn't helping either.
Quote:
Originally Posted by 1991 5.0 View Post
Quote:
Originally Posted by MadMikeyL View Post
The motor isn't that bad, it's that horrible AOD trans that makes the car such a dog. Put an M5R2 5-speed out of a supercoupe behind that 5.0, and it will be a night and day difference.
Does anyone have a right up on how to deal with the clutch pedal install i read some guys use ranger pedals ....can I use the very same clutch reservoir from a Scoupe and have room to locate it on the fire wall... any complications or fabrication involved ... I have a 100?s
I know can put a trans in and pressure plate and all that stuff but....
So what happens to the center council does the Scoupe short throw shifter accommodate itself right in place of the aod shifters spot with out hacking up shifting council area ...or do u have to nab the originals 5 speed center council to make it look neat?
Quote:
Originally Posted by RalphP View Post
Quote:
Originally Posted by 1991 5.0 View Post
Does anyone have a right up on how to deal with the clutch pedal install i read some guys use ranger pedals ....can I use the very same clutch reservoir from a Scoupe and have room to locate it on the fire wall... any complications or fabrication involved ... I have a 100?s
I know can put a trans in and pressure plate and all that stuff but....
So what happens to the center council does the Scoupe short throw shifter accommodate itself right in place of the aod shifters spot with out hacking up shifting council area ...or do u have to nab the originals 5 speed center council to make it look neat?
All the SuperCoupe stuff fits.

And you'll either have to hack up a AOD console, or swap to the SuperCoupe console, to get the M5R2 working.

RwP
Quote:
Originally Posted by Natesriv View Post
My AOD recently rebuilt, shifts fine runs great. A couple of times I punched it on a freeway onramp and it really took off.. surprised me! Mostly though it's a sedate cruiser... 200hp isn't that much. The torque sure is nice though.
Quote:
Originally Posted by T6Rocket View Post
Quote:
Originally Posted by Woodman View Post
the 3.08 rear end probably isn't helping either.
At least that's an improvement over the 2.73's they put in the Fox-body 5.0 T-Birds!

Al
Quote:
Originally Posted by Woodman View Post
Quote:
Originally Posted by 1991 5.0 View Post
Does anyone have a right up on how to deal with the clutch pedal install i read some guys use ranger pedals ....can I use the very same clutch reservoir from a Scoupe and have room to locate it on the fire wall... any complications or fabrication involved ... I have a 100?s
I know can put a trans in and pressure plate and all that stuff but....
So what happens to the center council does the Scoupe short throw shifter accommodate itself right in place of the aod shifters spot with out hacking up shifting council area ...or do u have to nab the originals 5 speed center council to make it look neat?
As far as I know, the only pedal assembly that drops in is the SuperCoupe one. Bolts right in, have to drill a hole. You can use the slave cylinder from a Ranger, but the pedal is MN-12 or nothing, and they're becoming unobtanium.
Quote:
Originally Posted by gordonm1 View Post
The Ford HO 5.0 is kind of a dog by today's standards where the new 5.0 Mustang motor makes 400HP.

Our old 5.0's can be modified to max out the factory computer and fuel system though. I did intake, exhaust, and went a bit further with gears.

Let the engine breathe easy with better intake and exhaust and you can max out what the computer can do with the stock 19lb fuel injectors. Taken a bit further there is the heads that pump air to the cylinders. There are Trick Flow intakes and heads that will make more power than the fuel system and computer supply without more programming or bigger injectors.

I went with a Mustang Cobra intake and kept my E7 heads and new exhaust for nice pick up in performance. I also did a rear end gear reduction which can be a straight trade of performance for fuel economy. 3.08 rear end to 3.73 was a 21% gear reduction and similar loss in highway fuel economy. It makes the old car impatient for old men and ladies in your way around town though. Rather than quietly waiting and cruising until the old folks get out of the way.
Quote:
Originally Posted by r429460 View Post
3.73 gears and a 3000 stall converter or higher, plus a tune.
Quote:
Originally Posted by Rayo View Post
Gears Gears Gears

As long as this isn't your daily driver, just throw some 4:10 gears in the rear end..
You're going to need that OD on the highway with those gears though..

The 5.0 MN12 were geared for MPG's, not HP's..

If you do a lot of cruising on the highway, then I wouldn't go any higher numerically than 3:73's







Rayo..
You all have been a blast of knowledge and very helpful with the engine aspect of my car ... Granted it's been up kept its just old motor odometer went out at 117k in 2013 so I don't know what it has .. I'm not an in-depth mechanic but I know a few things... I appreciate all the help from all and ive learned a lot on what I have now and where I need to take it.
I'm going to find out if my rings are worn first for sure do some compression tests ...unless the crank case breather is the culprit if all is good I'm going to do a trick flow or edelbrock upper end install heads /cam /chain/ intake/ bigger TB etc....and somehow manage headers if I can find out how to get past the rag joint/steering shaft clearance issue. It will be some time will update when it's done .
I'll keep up to date on progress if I need any help during the install...which I likely will need as far as orderly fashion assembly process ...torque specs etc...I Plan to do it over the winter along with AOD overhaul build and reverse manual valve body along with 3:73 trutrac.
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post #13 of 13 (permalink) Old 06-20-2017, 03:43 PM
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That PCV valve is on the back passenger side, right below the plenum.. there's a metal filter below the PCV valve which might need a good spray of carb cleaner.
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