1.9 HO cam, will it fit into a 2.0L SPI? | Ford Escort Owners Association (FEOA)
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1.9 HO cam, will it fit into a 2.0L SPI?

Discussion in 'Engine Tuning' started by Adlorin, Oct 22, 2007.

  1. Adlorin

    Adlorin Guest

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    So many 1.9L H.O to spi questions today. *rofl* If the cam and manifold will work, I might just head back to the salvage yard to pick them up. :)

    So.. does anyone know if the cam will fit or not?
  2. win0857

    win0857 FEOA Member

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    I know the spi uses a roller cam and lifters and the 88 down gt uses regular lifters so that isn't compatible.Not shure if the 88.5 up cam will swap into a spi head but a cam interchange would help.Look at camshaft websight for that info.

    mark
  3. ian_95lx

    ian_95lx FEOA Member

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    well you cant use a roller cam with flat tappet lifters, but i think you are able to use roller lifters on a flat tappet cam. other then that, i dont know much about escorts, but does the gt have a cam sensor? if it doesnt then there is another problem.

    the difference in cam profiles is, a flat tappet cam doesnt have a steep lobe since the lifter could potentially dig into the lobe if its too steep. it opens slowly, hits a peak, and closes slowly. a roller cam is usually a steep cam since the lifter rolls along the lobe. they normally have a higher lifter and shorter duration. not saying all will be that way, but its typical.

    its also the thought, if the lifter is basically flat (small bulge in them though) the cam lobe will need to have a shallow ramp. now if the lifter has a roller on it, it doesnt matter. it will just roll along the lobe. now the next question is, will the roller lifters still sit within there retainters with the gt cam. if not tested, it could throw lifters and/or damage the cam, lifters, rockers, etc.
  4. win0857

    win0857 FEOA Member

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    You don't want to change the lifter design in a head.The standard lifters are designed to spin but rollers will not work if the spin.The cam and lifter design is specific to the head.
  5. Jeffescortlx

    Jeffescortlx FEOA Member

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    Plus it's not worth it.

    And no you cant use the old HO intake manifold on the SPI, just the header can be tweeked to fit.
  6. jet-lee

    jet-lee Guest

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    The cam journals are the same, are they not?

    Hydraulic lifters adapt to varying lobe centers, right?

    Disregarding the cam position sensor, what else stops you from swapping cams?

    Are you not able to use roller lifters on a standard cam? Why?

    Most everytime I see someone shoot down an idea, no reason is given.

    WHY will it not work? Has anyone even tried?
  7. Jeffescortlx

    Jeffescortlx FEOA Member

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    What makes the HO cam so much better then the SPI cam that it's worth all the touble to use it? Technically the SPI is a more powerful engine, just does'nt have a cool high output name attached to it.
  8. jet-lee

    jet-lee Guest

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    lift and duration

    It's got a larger valve curtain for a longer period of time than the stock SPI cam.
  9. PonyExpress

    PonyExpress New Member

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    and would be worth a whole 5hp. plus it has no trigger for the cam pos. sensor.
  10. jet-lee

    jet-lee Guest

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    You're thick.

    Do you have data or experience to support your 5hp claim? Does anyone?

    How about, does someone have an SPI stock cam sitting around they can take a few pictures of, for me? I don't feel like ripping it out of my daily driver, yet. Jeff, maybe?
  11. Jeffescortlx

    Jeffescortlx FEOA Member

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    I agree with pony, you'll be lucky to get 5hp from a HO cam swap in a SPI. There's better way's to spend your energy on making power.
  12. jet-lee

    jet-lee Guest

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    And, once again, all questions have gone unanswered; especially the one asking WHY.

    Or did you even read my posts, Jeff?
  13. 1lowscort

    1lowscort FEOA Member

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    well here is the SPI cam
    Lobe Lift Intake (inch) (0.245)
    Exhaust (inch) (0.245)
    Allowable Lobe Lift Loss (inch) (.005)
    Theoretical Valve Maximum Lift Intake (inch) (0.405)
    Exhaust (inch) (0.405)
    End Play (inch) (0.0008-0.0078)
    Service Limit (inch) (0.0078)
    Journal to Cylinder Head Bearing Surface Clearance (inch) (0.0013-0.0033)
    Journal Diameter Standard (inch) (1.8007-1.8017)
    Runout Limit (inch) (0.005)
    Out-of-Round Limit (inch) (0.003)
    Camshaft Drive Assembled Gear Face Runout

    here is the HO cam
    [​IMG]

    You arent going to gain anything by putting a slightly smaller cam in there. You cannot use a flat tappet cam with roller lifters because a flat cam is designed to rotate the lifer, it is not a flat surface. roller lifters need a flat surface to reduce the wear to the roller wheel. also the roller lifter cannot spin sideways or it will destroy the cam and lifter. i have seen this first hand on one of my parts cars. the retainer broke, the lifter turned sideways and wore a nice groove in the cam and removed the roller portion lifter to the point that I could not remove the lifter from the head.

    so, you can technically put roller lifters on a flat cam, but it will eat lifters. also, i believe the roller lifters are longer than the flat lifters
  14. jet-lee

    jet-lee Guest

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    Your picture shows two different "Maximum Valve Lift"s, the larger being the HO cam and the smaller being the regular cam, with the HO being greater than the SPI.

    Thank you, though, for explaining (especially from first hand experience) about the lifters.
  15. 1lowscort

    1lowscort FEOA Member

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    oh, yea sorry about that. you are correct, the HO cam is slightly larger.
  16. jet-lee

    jet-lee Guest

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    The numbers look off.

    It's saying 10.06 millimeters is larger than 11.31 millimteres when converted to inches. They've got the inches measurement in the wrong place. If that's what you were going off of, you would've been right; it's a misprint. I was doubting myself enough that I ran out and double checked my HO cam sittin on my workbench.

    The lifter part was still helpful, thanks.
  17. 1lowscort

    1lowscort FEOA Member

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    yea, i was noticing that too. thats alldata for you. none of my books go up to 89 either, so i cannot use them for reference on this matter.
  18. jet-lee

    jet-lee Guest

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    My Haynes only goes down to '93, so, yeah.
  19. PonyExpress

    PonyExpress New Member

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    if im so thick then i guess that makes you an asswipe. get off your low insults.

    if you think so highly of this project, then do it. go buy yourself a 20 year old camshaft from a junkyard and hope the worn lobes dont cause you to lose power.

    and when your car runs in batch fire instead of sequential dont complain here about the MIL.

    for the cost of a new/reman HO cam, you can buy a new Crane cam with superior specs that was meant specifically for your engine.

    but dont listen to me.. ive only had one in my car for all but 5 years now.
  20. jet-lee

    jet-lee Guest

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    If you'd actually read my posts, you'd see:
    I already focking have one. I want to do it, but am trying to gather as much information as possible before taking apart my daily driver, to determine if it's even possible.

    Learn to read, then to understand, then come back and answer questions, which you STILL have not done.

    How is a different cam going to force batch fire on a sequential system?

    I live with a CEL, and don't complain, a clogged EGR does that. It's actually something I joke about.

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