Page 5 of 21 FirstFirst ... 3456715 ... LastLast
Results 41 to 50 of 209

Thread: 2.0L Duratec Rebuild

  1. #41
    Join Date
    Jun 2013
    Location
    N. California
    Posts
    120

    Default

    When you go down this road don't forget to try staggering the stacks. We had very good results with this in a road racing configuration. We ran equal length short stacks when running ovals.

  2. #42
    Join Date
    Jan 2006
    Location
    Seattle-ish
    Posts
    1,456

    Default

    I've heard that's a good strategy to broaden the torque curve. Did you find that cylinder mixtures were acceptable given you were tuning for the average between longer and shorter runners?

    Thanks,
    John
    '95 Westfield SEiW w/2.0L Duratec
    '68 Lotus Elan FHC
    '91 Miata w/Flyin Miata suspension & brakes
    '95 Porsche 993 C2
    '86 Porsche 944 turbo (neglected project car)
    Throttle Steer

  3. #43
    Join Date
    Jun 2013
    Location
    N. California
    Posts
    120

    Default

    We were able to tune individual cylinders by a global %, but it was not a huge amount. If you're not running super lean it should work fine. Initial tests were done with no individual cylinder tuning at the track, then fine tuned on the dyno.

  4. #44
    Join Date
    Jan 2006
    Location
    Seattle-ish
    Posts
    1,456

    Default

    Good to know, thanks. If the dyno shows there are big gains with this engine by running a variable intake, I plan to take a shot at making one. I picked up the variable intake system from a Yamaha R1 a few years ago for inspiration and when Emerald made my replacement engine loom, I had them include wiring for the native VTEC switch functionality in their ECU. Whether I can get everything to work well and fit within available space is a open -- and very large -- question. The video below shows the system in action. Relatively primitive, but so is the rest of my car

    Name:  lr82d.jpg
Views: 178
Size:  50.2 KB



    -John
    '95 Westfield SEiW w/2.0L Duratec
    '68 Lotus Elan FHC
    '91 Miata w/Flyin Miata suspension & brakes
    '95 Porsche 993 C2
    '86 Porsche 944 turbo (neglected project car)
    Throttle Steer

  5. #45
    Join Date
    Jan 2006
    Location
    Seattle-ish
    Posts
    1,456

    Default

    The floods finally receded which enabled me to drop off the rod bearings at the machine shop yesterday. If the standard size prove correct, and there are no other issues (I know, I knowÖ), the short block should be back home by the end of next week.

    Since people like photos and a photo of a box of bearings is kind of boring, here are a couple of photos of the flooding across the valley between my house and the rest of civilization that delayed the trip. Multiple road closures meant nasty traffic along the one main road that was still open at the north end of town. Thankfully things are back to normal. For now.

    Name:  flooding 0220.jpg
Views: 159
Size:  56.5 KB

    Name:  flooding 2 0220.jpg
Views: 153
Size:  62.0 KB

    -John
    '95 Westfield SEiW w/2.0L Duratec
    '68 Lotus Elan FHC
    '91 Miata w/Flyin Miata suspension & brakes
    '95 Porsche 993 C2
    '86 Porsche 944 turbo (neglected project car)
    Throttle Steer

  6. #46
    Join Date
    Jan 2020
    Posts
    141

    Default

    Ugh! The world is heading for a lot more of that!
    1987 Caterham 1700 Supersprint
    2002 Porsche Boxster
    2004 Porsche Boxster S
    1941 Dodge Luxury Liner
    2009 Mercedes CLK 350 Cabriolet
    2017 Chevrolet Volt

  7. #47
    Join Date
    Jul 2009
    Location
    Arkansas and . . .
    Posts
    3,674

    Default

    John, when I was putting the Stalker back together, I needed to have the rear end rebuilt and set up. At that time (due to heavy rain associated with a hurricane) the trip to the repair facility required a two-hour trek through the woods from south AR to Shreveport, LA (I-20 was shut down due to flooding). But me, being bound and determined to get my rear end rebuilt, picked and guessed my way down. I ran across one section of flooded road and, well, tested the waters. I considered the mission successful once I was back home....same day.
    Stalker V8, chassis #85

    Stalker Chassis #85 Build Gallery
    Stalker Chassis #85 Owner Thread

    Get up in the morning and give the day your very best. You donít get it back.

  8. #48
    Join Date
    Jan 2006
    Location
    Seattle-ish
    Posts
    1,456

    Default

    Shane, it sounds like your cars have more ground clearance than mine

    I just heard from the machine shop. There is too much clearance with the standard thickness rod bearings, which is the opposite problem we had with the main bearings. New, one size thicker bearings were just ordered and this time they agreed to make an exception and ship directly to the shop.

    -John
    '95 Westfield SEiW w/2.0L Duratec
    '68 Lotus Elan FHC
    '91 Miata w/Flyin Miata suspension & brakes
    '95 Porsche 993 C2
    '86 Porsche 944 turbo (neglected project car)
    Throttle Steer

  9. #49
    Join Date
    Nov 2010
    Location
    NC
    Posts
    164

    Default

    What head are you going with ?

    Tom

  10. #50
    Join Date
    Jan 2006
    Location
    Seattle-ish
    Posts
    1,456

    Default

    Same head as before: 2.0L Duratec head with the exhaust tumble removed, some port clean up, and this time he reprofiled the backside of the valves. It may not flow quite as much as a later 2.3L head or the high port head that was available in some non-US markets, but it should flow more than enough for my target of 225-230hp.

    -John
    '95 Westfield SEiW w/2.0L Duratec
    '68 Lotus Elan FHC
    '91 Miata w/Flyin Miata suspension & brakes
    '95 Porsche 993 C2
    '86 Porsche 944 turbo (neglected project car)
    Throttle Steer

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •