1988.5 GT can I lower compression | Page 2 | Ford Escort Owners Association (FEOA)
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1988.5 GT can I lower compression

Discussion in '1st Gen 1981-1990 CVH' started by stangowner8687, Jul 31, 2020.

  1. 1982 EXPert

    1982 EXPert FEOA Member

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    Okay, I'll double check that, they've been wrong before lol

    Rock Auto does NOT sell standard-size rod bearings just so everyone knows.
    They have a serious inventory issue where any CVH STD rod bearing you order gets converted to an undersize bearing because they don't have any STD despite what their online inventory says.... And when you order them, waiting 1-2 weeks to get them and find out they're wrong you'll be livid because they're not interested in replacing the ones you ordered nor are they interested in covering your shipping cost for THEIR error.

    Went through this myself last summer and since then 4 other friends with CVH-powered Escorts had the same exact issue......
    austin86 likes this.
  2. stangowner8687

    stangowner8687 FEOA Member

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    Ok guys you just bombarded me with a a lot of info, I’m going to reread and possibly tripple read everything for confirmation. And thank you guys for the tips/info/support

    P.S. rockAuto screwed me over back when I was redoing the 1.6 in the Exp turbo. Wrong oil pump wrong gaskets even got a wrong parts for the 4.9 I’m my bronco and the 5.0 in my 84 mustang. I’ve since swore off that company but aside from that I’m still very thankful for any and all Info you’ve recovered by using their website.
  3. stangowner8687

    stangowner8687 FEOA Member

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    Alright so looks like I’m taking a whole engine down to my “go-to” machine shop, so I might end up using 2.0 pistons anyway. Is there a specific cam kit I should grab? I’m looking on burtons website and not sure what’s gonna fit my FrankieStein application I also know there’s a user here who use to have custom harlandsharp roller rockers I think it was lowscort I’d love to know how those are working out for him after all these years. As far as intercoolers Go I was just gonna get a kit off eBay. Again just a reminder I have no intention of replacing Cv joints after every joy ride so I’m still planning for under 200whp not to mention watching 2nd gens on YT torq steer off the road doesn’t seem appealing to me so I’m not after that life
  4. stangowner8687

    stangowner8687 FEOA Member

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    Error
    Last edited: Aug 4, 2020
  5. marclar

    marclar Administrator Staff Member

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    so the pressure doesn't really matter so much. its the cfm that matters. lowering the compression ratio is designed to prevent pre ignition, which can be mitigated with proper fueling and timing corrections... so lets say you have an engine that has 150, and you put different pistons in that lowers the c/r to 140psi.... when you add boost, all you are doing is adding more pressure and cfm.... so if you add 10psi of boost at X cfm, you have X cfm at 140+boost 10=150psi. so all you have done is returned to the origional compression pressure and added CFM.... the higher your total compression ratio and cylinder pressure the higher power you will make. if you can keep the origional pressure and ADD boost raising the overall charge volume, that will give you the best results... running a high octane fuel and retarding timing, or even a totally stand-alone system is the best way to go.

    side thought...if you put a split port head on a 2g 1.9 it makes it interfearance, and i believe the valves hit the pistons. so unless you had super dished pistons the split port valves will hit.
  6. 1982 EXPert

    1982 EXPert FEOA Member

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    Burton's cams won't work for you, only 1.9 & 2.0 camshafts fit in the 1.9 & 2.0 heads

    1.1-1.3-1.4-1.6 cams are interchangeable but only work in 1.6 or smaller CVH heads because the journal sizes are smaller
  7. austin86

    austin86 That nut who spends way to much on a escort.

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    Cran cams can reground a good cvh cam.
  8. stangowner8687

    stangowner8687 FEOA Member

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    Should I send them a cam out of my 90 LX motor or GT? My ideal situation is to work with one of my spare motors which I’ve a couple LX motors and 1 or 2 1.6 heads. While I drive the GT up to the day of the swap. But if the internals are inferior then I’m ok with pulling the GT motor
    Last edited: Aug 4, 2020
  9. austin86

    austin86 That nut who spends way to much on a escort.

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    If the gt cam is good I would send it. It has more meat on the lobes
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