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Thread: 555 advice

  1. #1
    Junior Member SHOW GUEST
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    Mar 2004
    Posts
    8

    555 advice

    I am planning on building a 555 this winter. Its going to be around 13.1 (unless I opt to go with the 14.5:1 pistons). I'll give the combo I have and then I have a couple of questions, hopefully I can get some input...

    Dart 9.8 block 4.560 bore x 4.25 stroke
    SRP pistons 13.1:1 compression
    6.385 rod
    Dart 325 Pro 1 heads, 2.30/1.88's, gasket matched only
    Victor 454r intake (4150)
    Prosystems 1000 cfm 4150
    400 turbo trans
    8" ptc converter (5500 behind 468, probably will have to adjust)
    4.10 gear for now
    28" slick

    Car weighed 3430 race ready and will add a little weight with the dart block. Here are my questions:

    1. How much will the heads limit this combo? With my weight I would rather make power lower than higher, but I would think the engine should still support over 7000rpm's with the heads

    2. What camshaft would you recommend to run with this combo

    3. How much power potential and et's are possible?

    This is in a g body car btw....

    Thanks

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    May 2003
    Location
    Coldwater, MI
    Posts
    2,998

    Re: 555 advice

    Quote Originally Posted by cherp22
    I am planning on building a 555 this winter. Its going to be around 13.1 (unless I opt to go with the 14.5:1 pistons). I'll give the combo I have and then I have a couple of questions, hopefully I can get some input...

    Dart 9.8 block 4.560 bore x 4.25 stroke
    SRP pistons 13.1:1 compression
    6.385 rod
    Dart 325 Pro 1 heads, 2.30/1.88's, gasket matched only
    Victor 454r intake (4150)
    Prosystems 1000 cfm 4150
    400 turbo trans
    8" ptc converter (5500 behind 468, probably will have to adjust)
    4.10 gear for now
    28" slick

    Car weighed 3430 race ready and will add a little weight with the dart block. Here are my questions:

    1. How much will the heads limit this combo? With my weight I would rather make power lower than higher, but I would think the engine should still support over 7000rpm's with the heads

    2. What camshaft would you recommend to run with this combo

    3. How much power potential and et's are possible?

    This is in a g body car btw....

    Thanks
    1. Heads will limit it I'd say 75hp over a better suited set, one thing is its a heavy car so the smaller head will help that.
    2. I'd call Bullet Cams for a cam if not just a Reher Morrsion Hot Rod Series Cam will be good.
    3. Honest HP 875-915 max I'd use 14.5:1 compression and toss the 4150 stuff for a good 4500 carb and use a 4500 454R.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  3. #3
    Junior Member APPRENTICE
    Join Date
    Jun 2006
    Posts
    14
    Definately go with the compression. You will need a piston with at least 46cc dome to get that, but the power will be well worth it. I would also lean towards the Brodix 3xtra oval port heads if the budget allows it. A Brodix BM or Profiler Sniper manifold and a 1050 dominator will make more power than the 4150 series carb. I have all the parts in stock to do this combo at prices competitive to mail order. I also have a cam that will work, but you will have to call to get it. Can't give the numbers on here. Brad 864-578-5622 PAR Racing

  4. #4
    Junior Member SHOW GUEST
    Join Date
    Mar 2004
    Posts
    8
    Really for this year I don't have the budget. The short block and valve train is going to run all the budget I have for it this year. Maybe next year I can sell my 325's and 4150 stuff. How do you think this combo will run with the parts that I have? I'm sure the camshaft will be real important.

    Hammertime I see you dealt with nyes, I talked to Pat the other day and I think I am going to order the shortblock from him. Was going to do it myself but I can't build it for that kind of money they sell for.

    Here is a pic of the car, still has bench seat, back seat, dot's, etc.

  5. #5
    Senior Member RACING JUNKIE
    Join Date
    May 2003
    Location
    Coldwater, MI
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    2,998
    Quote Originally Posted by cherp22

    Hammertime I see you dealt with nyes, I talked to Pat the other day and I think I am going to order the shortblock from him. Was going to do it myself but I can't build it for that kind of money they sell for.
    Pat is a top notch guy that builds a good motor for a good price. I'd ask him for some camshaft advice also.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  6. #6
    Administrator RACING JUNKIE bjuice's Avatar
    Join Date
    Apr 2003
    Location
    Greenville s.c.
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    3,239
    Quote Originally Posted by PAR
    Definately go with the compression. You will need a piston with at least 46cc dome to get that, but the power will be well worth it. I would also lean towards the Brodix 3xtra oval port heads if the budget allows it. A Brodix BM or Profiler Sniper manifold and a 1050 dominator will make more power than the 4150 series carb. I have all the parts in stock to do this combo at prices competitive to mail order. I also have a cam that will work, but you will have to call to get it. Can't give the numbers on here. Brad 864-578-5622 PAR Racing
    Brad you have a pm..good to see you on the site !

    Guys Par is a premeier engine builder in the world. they have powered many world champions...
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "


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