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Thread: Derek's Project GFP

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  1. #1
    Join Date
    Sep 2012
    Location
    Raleigh, North Carolina
    Posts
    590

    Derek's Project GFP

    I would like to introduce my new project for my 1989 SC 5spd. Currently my car has a perfectly good 4.2 engine with an MPX that makes over 380whp on pump gas. It won its dyno class (M90) at the 2016 shootout. Its running somewhere in the high 12s at the track, trapping ~107mph, and it probably should go mid 12s with a better driver. Itís a great car, and I enjoy driving it to work when the weather is nice, which is most of the year down here in NC. I have learned a tremendous amount from these forums and wrenching on this car over the past 5 years. The car is a blast to drive and is pretty clean for its age. However, as is often the case, I have been bitten by the horsepower bugÖ again.

    I have been considering my options for a while now. Should I put a bigger supercharger on it? Should I go turbo? Should I swap the engine? If so, which engine? Iíll share a little bit about my decision making process and let you guys understand where I am coming from, even if you donít agree with it.

    Bigger supercharger: These are somewhat hard to come by and usually cost in the $2-4k ball park from what I have seen over the years. Then there is the cost of fuel system upgrades. The cars that I have seen with the ARs and the Whipples seem to make in the 450-500 whp range. While this is impressive, I donít think this option is for me.

    Turbo: I thought a long time about just putting a turbo on the current engine. I really like the idea of a turbo, making more power per PSI. This is a bit more expensive option but Iím not really sure how expensive. I would guess in the $6k range. Add another $2k if you want to upgrade the fuel system and convert to corn. Binks has shown that you can make over 700whp with a turbo on E85. Concerns about converting to corn, and the overall stress put on the motor to run at this level are holding me back from this option.

    Engine swap: A V8 should be easier to make the kind of power I want. So which engine to swap? The 5.0 is the obvious choice, mainly because it fits. David Dalke going 11.7 on a stock 5.0 with a turbo is pretty awesome. But we all know the stock 5.0 is a time bomb near 500 hp. Looking at Dart blocks to counter act this problem would add at least $2k to the price. And I wouldnít put stock stuff in a Dart block, Iíd have to build 347, and it would end up being $10k knowing me. And really when you get down to buying Dart Block, you can build a 427 almost as cheap as a 347. So facing that decision, I started considering the production 351w. From what I can tell, the stock 351 block can survive in the 600-800 range. My research tells me it will fit, it will be a pain, but it will fit. Iím liking this option.

    So what are my goals? Iíd like to make a 700 whp street car. Iíd like to build a turbo car. I need a project and I really enjoy wrenching. I have recently added a tig welder to my shop, so I would love to use that to fabricate some of my own stuff. I have always wanted a 408 or a 427 sbf, why? I donít know, I just like big small blocks. Whats the budget? Im going to say ~$10k, but thatís over a couple years and this project is likely going to evolve. I kind of have the idea that I would spend about the same as I did when I built the 4.2, but end up with 700whp instead of 400whp. I am going to do a better job on this project to save money where I can, and spend it where required. RequiredÖ thatís kind of funny when you have a perfectly good engine in your car.

    How to get there? Here is the loose initial plan. I am going to start with a stock 5.8 from E-150 van, a junkyard motor that made about 210hp and 325ftlbs when newÖ not that different than what a 1989 SC makes. The first phase is to get it in the car and running. Add to that finding an intake/hood combination that will work. The second phase is to add a turbo and get that working on the stock motor (with some big ring gaps). The idea is to run low boost, to figure tuning and what not with the turbo. If this phase works well, then the car might stay this way for a while. The third phase, the engine would receive heads and a cam. By this point I would anticipate that it should be making in ~500 whp range at this point on pump gas. Once all that is figured out, the plan is to ďbuildĒ the 351 into a 408 or 427. And somewhere along the way, I will be selling my current motor, MPX , and miscellaneous parts to help offset the cost.

    So there you have it. Project GFPÖ Glutton for Punishment. Iíll give DD credit on the project name. However, that phrase has been muttered a number of times over the past few years by me and my cousin as weíve wrenched on the SC. This isnít going to be easy. Not exactly cheap. But it should be a lot of fun and provide a good long term project for me and the SC.


    And here we go....

    Name:  junkyard motor day 1.jpg
Views: 316
Size:  168.8 KB
    Any idiot can make a Mustang fast...
    It takes a special idiot to make a Thunderbird fast!!!
    89 SC 4.3 stroker 384rwhp 473ftlbs
    Best ET 13.085 Best MPH 106.6... got some work to do!
    2016 V6 M90 Dyno Champ 2016 Mod 1 Runner Up

  2. #2
    Join Date
    Jan 2003
    Location
    Woodbridge, VA
    Posts
    5,084
    Sounds fun! I wanna do a 351 in my 5.0 car someday.
    ~Chris
    SCCoA Member #1826
    Bettie Riding jack stands
    SCARlet on drag duty now

  3. #3
    Join Date
    Apr 2002
    Location
    Greenville, IN
    Posts
    4,253
    Cool, Derek

    Sounds like we were on the same mental path this summer..lol.

    Since I had a broken motor though, I chose to take the 3.8 further for now to get it back up and running. Glad I did, this time!

    Be sure to post up your fabrication pictures...that's the real fun stuff, if you ask me.
    Matt Haub
    Shootouts: '09 SS 1st | '10 Mod1 2nd | '11 Bracket 3rd | '12 Bracket 1st | 2013 | '14 Bracket 3rd | 2015 | '16 Bracket 1st & Mod2 2nd | 2017 |
    Black '89 5spd - 281K miles, MPx, E85, Alky-Inj ¶ RWHP: ? RWTQ: ? ¶ Best 1/4mi:12.521, MPH:107.23mph
    35th Anniversary Auto 46k miles | Red '93 Auto 186k miles
    My Garage

  4. #4
    Join Date
    Sep 2004
    Location
    Herrin Illinois
    Posts
    3,385
    Awesome Derek! make I your own.
    MEMBER #2488 best rwhp 504 485 torque
    2016 shootout Best of show award
    2015 Carlisle Best of show modified, 1st place 92 93 SC and Celebrity's choice award winner.
    2014 Shootout Best of show 1st award winner
    2014 Comp cams VIP Car craft street machine nationals
    http://www.sccoa.com/forums/garage.p...e_view&id=7152

  5. #5
    Join Date
    Sep 2012
    Location
    Raleigh, North Carolina
    Posts
    590
    For the last week or so, I have begun the process of tearing the motor down. I didnít want to do this, but when I did a leak down test, 4 of the 8 cylinders were at 50% or worse. #1 cylinder was the worst, holding 20-40% (which is 60-80% leak). I got the head off and tore it down. The exhaust valves are worn and pitted. The valve seats and guides look ok on the head, but the seats have some slight pitting. I ordered one new exhaust valve and some lapping compound to see if the head was salvageable. I lapped both the intake and exhaust valve on #1 and the valve and seats look pretty good now. I will order the rest of the exhaust valves and continue this process. I didnít want to spend any money on these heads (the stock heads are very poor performing heads), but for the sake of the project, spending $50 buck on exhaust valves is a lot better than having to spend $2k on heads at this point. I will have to take the heads to a machinist to remove the front most intake manifold bolt on each side that broke off when I removed the intake. I was able to remove the broke exhaust bolt and a broken water pump stud. After removing the rotating assembly, I also found that it also needs new rod and main bearings. The crank could also use a quick polish, but it really looks pretty good all things considered. Time to order some parts and get the block all cleaned up.
    Any idiot can make a Mustang fast...
    It takes a special idiot to make a Thunderbird fast!!!
    89 SC 4.3 stroker 384rwhp 473ftlbs
    Best ET 13.085 Best MPH 106.6... got some work to do!
    2016 V6 M90 Dyno Champ 2016 Mod 1 Runner Up

  6. #6
    Join Date
    Jul 2004
    Location
    Hamilton NJ
    Posts
    1,966
    Good luck with your new project buddy!!!

    Will miss hanging out with ya this years Shootout man!
    Tom Downs-member#2752
    MPX'd 90 SC Auto~bought Feb. 2012
    http://www.sccoa.com/forums/garage_v...vehicle&id=424

  7. #7
    Join Date
    Sep 2012
    Location
    Raleigh, North Carolina
    Posts
    590
    Thanks Tom I am going to miss you guys too. I hate to miss the shootout, but its probably for the best this time around. This year got messed up with the job situation. I hope a lot of guys set some new personal best at the track!
    Any idiot can make a Mustang fast...
    It takes a special idiot to make a Thunderbird fast!!!
    89 SC 4.3 stroker 384rwhp 473ftlbs
    Best ET 13.085 Best MPH 106.6... got some work to do!
    2016 V6 M90 Dyno Champ 2016 Mod 1 Runner Up

  8. #8
    Join Date
    May 2012
    Location
    Oregon
    Posts
    768
    Any pics of this work??? I'm interested in seeing the photos that go with the descriptions of wear, tear and damage.

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