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  1. #101
    FEP Power Member wman24's Avatar
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    Is this posted on the coral? Seems to be a lot of good engine building info over there.

  2. #102
    Venomous Moderator Hissing Cobra's Avatar
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    I haven't hit the corral with it but I have talked to Woody over there via PM's.
    Pete Slaney

    1979 Mustang Cobra

    347/T-5/4.30's
    420 rwhp/380 rwt (New Motor)
    11.49 @ 121.86

    306/T-5/4.30's (Old Motor)
    307 rwhp/278 rwt
    12.38 @ 111.38

  3. #103

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    Pete i hope you figure this all out really sorry to here you are still having issues

  4. #104
    Venomous Moderator Hissing Cobra's Avatar
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    Thanks Chet! We'll get it. It just means more time and probably more money. It is what it is.
    Pete Slaney

    1979 Mustang Cobra

    347/T-5/4.30's
    420 rwhp/380 rwt (New Motor)
    11.49 @ 121.86

    306/T-5/4.30's (Old Motor)
    307 rwhp/278 rwt
    12.38 @ 111.38

  5. #105

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    We've hurt thrust bearings with the yoke on the drive shaft. Didn't catch the splines where twisting so when you put it back in the trans I doesn't go in as far. So check the end play on the drive shaft.

  6. #106
    Venomous Moderator Hissing Cobra's Avatar
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    Quote Originally Posted by forxlr8n View Post
    We've hurt thrust bearings with the yoke on the drive shaft. Didn't catch the splines where twisting so when you put it back in the trans I doesn't go in as far. So check the end play on the drive shaft.
    I've never thought about that. We'll check that as well. In the meantime, my brother came on over and checked it when it was cold and it came in at the same .010 clearance. Thus the number did not change between hot and cold. Good sign? When my brother checked it while it was hot, I had about 110 miles on it. I then drove it 30 more miles while cruising around and then driving it home, where it's sat since. So, in the past 30 miles that measurement has stayed at .010. Good sign?

    I haven't been able to drive the car for the past couple of weeks because of the weather and now the salt is all over the place. After we get a good rain storm where it doesn't freeze, I'll be driving it again. My brain has calmed down somewhat and I'll drive the car in small increments and keep measuring that crank end play. If it doesn't keep growing, I'll keep driving it. If it continues to open up and grow larger, I'll then know that I've got a serious problem on my hands again. At this point, I think I'm numb to the pain - if you know what I mean.
    Last edited by Hissing Cobra; 12-16-2013 at 10:18 PM.
    Pete Slaney

    1979 Mustang Cobra

    347/T-5/4.30's
    420 rwhp/380 rwt (New Motor)
    11.49 @ 121.86

    306/T-5/4.30's (Old Motor)
    307 rwhp/278 rwt
    12.38 @ 111.38

  7. #107
    FEP Super Member mustangxtreme's Avatar
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    Good luck Pete.
    Dave

    If common sense was common wouldn't it just be sense?

    1983 Capri L T top 5.0 efi aod
    1983 Capri RS Turbo
    1981 Black Magic 400 c6
    93 F-250 351 5sp 4x4

  8. #108
    Venomous Moderator Hissing Cobra's Avatar
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    Thanks Dave! I really appreciate it.
    Pete Slaney

    1979 Mustang Cobra

    347/T-5/4.30's
    420 rwhp/380 rwt (New Motor)
    11.49 @ 121.86

    306/T-5/4.30's (Old Motor)
    307 rwhp/278 rwt
    12.38 @ 111.38

  9. #109

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    I think you'll be okay. When you check the drive shaft have the wheels on blocks and allow for sup travel.

  10. #110
    FEP Senior Member
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    For what its worth, the 331 currently in my 85 Mustang had a similar issue with excessive crankshaft thrust clearance after a while, with an Eagle crank. At the time, it was in my buddys 64 Comet, and since it is an open header bracket racer, no funny noises were heard, but one day at the track, it was noticed that the crank had too much play while we were adjusting the clutch. He pulled it out, and the backside of the thrust bearings were all gouged up, and the mating surface of the crank was not as smooth as a factory Ford crank. There was .065" of thrust play. He tossed the Eagle crank, and bought a new Scat 3.25" stroke crank, ran the engine for 2 more seasons, and then I bought it when he decided to build a big bore 347 (4.125 bore, 3.25 stroke). I have ran the old engine for the past 2 years in my Mustang, and it still runs great, and has had no further problems with thrust clearance. My car is also a stick (Jerico 4 speed/McLeod Soft Lok clutch), and I always start my engine with the trans in neutral and clutch pedal released (no clutch switch.) I ran my Mustang in NHRA Stock Eliminator for 10 years, both in National and divisional events, and I have never had any Tech guy say that I needed to install a clutch pedal switch. And believe me, at a NHRA National event, you are getting teched by the same guys who tech the big name Pros.
    1978 Fairmont 2 door sedan, 428CJ 4speed. 9.972ET@132.54mph. 1.29 60 foot
    Replaced the FE big block with my 331/4 speed in my Fairmont, best 10.24ET @128 MPH.
    1985 Mustang LX hatchback NHRA Stock Eliminator 302 4 speed best in legal trim 12.31@107 mph, but has gone 11.42@115 with aftermarket intake, carb, and iron Windsor Jr. heads.New for 2012! 331 cube SB Ford, AFR 185 heads, solid flat tappet cam, pump gas; 10.296ET@128.71 mph, 1.37 60 foot.
    1979 Zephyr Z7, all original 302 auto, 2nd owner.

  11. #111

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    Wow. What a great thread. Learned a lot from this. I hope you are able to sort everything out.
    Current Ride:
    2007 silver Ridgeline RTL

    Past Rides:
    1985 black 2.3 auto Capri
    1989 black GT
    2000 laser red 3.8 5-speed Mustang

    Future Ride:
    85/86 GT or Fox Notch or Any Cobra

  12. #112
    Venomous Moderator Hissing Cobra's Avatar
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    Thanks! I'm keeping my fingers crossed. With the crappy weather and salt still all over the roads, I haven't been able to drive the car since then, which has been about a month. I'm chompin' for a ride!
    Pete Slaney

    1979 Mustang Cobra

    347/T-5/4.30's
    420 rwhp/380 rwt (New Motor)
    11.49 @ 121.86

    306/T-5/4.30's (Old Motor)
    307 rwhp/278 rwt
    12.38 @ 111.38

  13. #113
    Venomous Moderator Hissing Cobra's Avatar
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    O.K. guys, I've got some good news. We've finally got the car/motor to where we want it as I've been having issues with it starting while hot and also the carburetor idle kept going out of whack and idling at a minimum of 1,500 rpms. I cured the starter problem by installing a Ford Motorsport mini-starter (standard starter for '92 & '93 Mustangs) and my brother figured out the carburetor. With the carburetor, the rod that connects the linkages from both the primary side of the carburetor and the secondary side of the carburetor was bent incorrectly from the factory and it was forcing the secondary butterflies to remain slightly open, causing a lean condition at idle which we could only fix by backing the idle control screws outwards about 4 or 5 turns to compensate. This would wreck the idle and only allow it to idle at 1,500 rpms (anything lower and it would stall out). Now that those two issues have been fixed I've been driving it like crazy to get some miles on it.

    I'm now up to 475 miles since the engine installation and it's been running real good with great oil pressure, plenty of power, and awesome drive-ability. In fact, it's been running so good that I thought we'd take it to the dyno today to see what it would make for power. All along I've been wanting to get it to the dyno but with all the issues we've been having that was something that just could not have happened - until today. We drove down to Mike Dez Racing in Seekonk, Massachusetts (you may have read about him in Muscle Mustangs & Fast Fords Magazine as he's been in there numerous times) and strapped it to the rollers. My twin brother's 331 stroker motor dyno'd at 387 rwhp/362 rwt so I was only expecting about the same results even though mine is a 347. What we got shocked me as it put down 408 rwhp/371 rwt on the first pull. We noticed that the air/fuel ratio on the secondary side of the carburetor was running quite lean so we pulled it off, took off the fuel bowl and changed the jets from 77's to 79's and bolted it back on. The second pull increased horsepower to 418rwhp/379 rwt. At this point we checked the timing. It was at 10 degrees and all in by 30 so we changed it to 14 and 34 then made another pull. It pinged on that run and horsepower/torque dropped as we had to abort that run. For the final pull, we backed the timing down to 12 degrees and total timing to 32 degrees. This seemed to be the sweet spot as there was no pinging, detonation, or knocking and on this final run the horsepower increased to 419rwhp/382rwt. With no changes left to make we packed up our tools and called it a day.

    As for my thrust bearing? I've lived in fear of that since July and I will no longer be held hostage by it. My brother and I still have not re-checked it since it was at .10 because we don't want to get depressed. If we check it and we see that it's getting worse than the motor would have to come back out. If we check it and it stays the same then all is good. Right now we just want to live in the glory and keep our spirits up. We've taken that approach that "no news is good news" and with the way the motor is running and with the power we put down today, we'll be keeping our fingers crossed that the motor will live on for many years to come.

    To say that today was refreshing is an understatement. Since last May 31st, I've had to deal with my driver's door getting backed into, the installation of new struts/shocks/springs, the removal/installation of a new heater core, the removal of the old motor and installation of a new motor, the removal/disassembly/reassembly/reinstallation of that motor (thrust bearing issue - the reason for this thread!), the hot starting issues, and the carburetor idle adjustment nightmare. I'm really hoping that 2015 can be a much better year for myself and my Cobra. I'm keeping my fingers crossed!

    Here's a copy of the dyno sheet from this morning.



    Here's a pic of the engine compartment that was enhanced by my new 347 air cleaner decal that I got from David Dowden. I'm luvin' it!

    Last edited by Hissing Cobra; 04-01-2014 at 06:29 PM.
    Pete Slaney

    1979 Mustang Cobra

    347/T-5/4.30's
    420 rwhp/380 rwt (New Motor)
    11.49 @ 121.86

    306/T-5/4.30's (Old Motor)
    307 rwhp/278 rwt
    12.38 @ 111.38

  14. #114
    FEP Super Member JTurbo's Avatar
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    Nice Pete - glad you stuck with it.
    1979 Indy Pace Car Mustang 302 / 5spd
    1982 Mustang GT T-Top 302 / 4spd
    1986 SVO Mustang - 1C

  15. #115
    FEP Super Member STANGMAN116's Avatar
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    engine and bay looks amazing!! glad to see the bugs worked out

  16. #116
    FEP Senior Member SVT1's Avatar
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    Pete congrats on the numbers! Pete and Paul, nice work on the tuning and the build!

    The car looked and sounded great today and it was cool to see both you guys working together to fine tune it at the dyno. The motor runs awesome and I'm certain you will be just as surprised when you hit the track as you were at the dyno today!

    Great work!
    1987 Mustang GT
    S trim. 10.85 at 128. stock short block and stock T5.

    2002 Mustang GT convertible.
    auto with 4.10's and tune.

    2008 Viper SRT10 Coupe.
    11.33 at 127 bone stock everything.

  17. #117
    86 50CPRI
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    Awesome numbers..WOW!!!

  18. #118
    Venomous Moderator Hissing Cobra's Avatar
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    Thanks everyone. It feels so good to finally have all the bugs worked out of it and to see/hear it running so good. I'll just keep my fingers crossed that the thrust bearing remains intact. We'll see how it goes as I get more mileage on it.
    Pete Slaney

    1979 Mustang Cobra

    347/T-5/4.30's
    420 rwhp/380 rwt (New Motor)
    11.49 @ 121.86

    306/T-5/4.30's (Old Motor)
    307 rwhp/278 rwt
    12.38 @ 111.38

  19. #119
    FEP Super Member mustangxtreme's Avatar
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    Congrats on an awesome dyno run Pete. It looks like you need to change your signature now.
    Dave

    If common sense was common wouldn't it just be sense?

    1983 Capri L T top 5.0 efi aod
    1983 Capri RS Turbo
    1981 Black Magic 400 c6
    93 F-250 351 5sp 4x4

  20. #120
    Venomous Moderator Hissing Cobra's Avatar
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    Dave,

    Thanks! You're right. I'm off to do it now.
    Pete Slaney

    1979 Mustang Cobra

    347/T-5/4.30's
    420 rwhp/380 rwt (New Motor)
    11.49 @ 121.86

    306/T-5/4.30's (Old Motor)
    307 rwhp/278 rwt
    12.38 @ 111.38

  21. #121
    Venomous Moderator Hissing Cobra's Avatar
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    Reviving this from the dead, as it's been awhile since there was an update. Well, the motor has held together so far and I've been a happy camper as a result. It'll fry the tires from a roll at 40 mph - something my old 302 wouldn't do. I've got about 2,600 miles on it this summer without any major issues. The important news is that I took it to Lebanon Valley New York this past weekend so that I could run it down the track to see what it could do. I made it down the track 13 times between Saturday and Yesterday and boy does it want to go! My best pass was an 11.86 @ 117! It's not the 11.40's @ 121 that I predicted but I'm O.K. with that because I was able to drive it home without breaking it.
    Pete Slaney

    1979 Mustang Cobra

    347/T-5/4.30's
    420 rwhp/380 rwt (New Motor)
    11.49 @ 121.86

    306/T-5/4.30's (Old Motor)
    307 rwhp/278 rwt
    12.38 @ 111.38

  22. #122
    FEP Power Member gmatt's Avatar
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    Awesome!

  23. #123
    FEP Member brianj's Avatar
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    Nice pete! I keep cheering myself up by reminding myself that I beat you at Epping. Of course, that was because you went up in smoke at the line, but hey, a win is a win! I don't stand a chance next time. I may pick your brain about the shop in Seekonk- I need a few dyno pulls, and don't know anyone in N.H. I trust.
    1983 Mustang G.T. No-option stripper- I like strippers.
    5.0, GT40P heads, Comp Cams XE270HR-12 on 1.6 rockers, TFI spring kit, Weiand 174 blower, Holley 750 mechanical secondarys, Mishimoto radiator, Edelbrock street performer mechanical pump, BBK shortys, T-5 conversion, 8.8 rear, 3.73 gears, carbon fiber clutches, SS Machine lowers, Maximum Motorsport XL subframes, "B" springs.

  24. #124
    Venomous Moderator Hissing Cobra's Avatar
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    Yeah, you kicked the crap out of me at Epping. LOL! From what I understand, Pete at Performance Dyno in N.H. is really good as well. I've got a few friends I know that have gone there and got good results.
    Pete Slaney

    1979 Mustang Cobra

    347/T-5/4.30's
    420 rwhp/380 rwt (New Motor)
    11.49 @ 121.86

    306/T-5/4.30's (Old Motor)
    307 rwhp/278 rwt
    12.38 @ 111.38

  25. #125
    FEP Member brianj's Avatar
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    Where is performance dyno?


    Edit-- guess I could just Google it, huh? Loudon, up by the lake. We ought to make it a cruise destination for the new england guys some time.
    Last edited by brianj; 09-01-2014 at 05:18 PM.
    1983 Mustang G.T. No-option stripper- I like strippers.
    5.0, GT40P heads, Comp Cams XE270HR-12 on 1.6 rockers, TFI spring kit, Weiand 174 blower, Holley 750 mechanical secondarys, Mishimoto radiator, Edelbrock street performer mechanical pump, BBK shortys, T-5 conversion, 8.8 rear, 3.73 gears, carbon fiber clutches, SS Machine lowers, Maximum Motorsport XL subframes, "B" springs.

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