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Street Build Drag Week 2G DSM - 8 Second Street Car

Year:
1995
Model/Trim:
Mitsubishi Eclipse GSX
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  1. beansblacktsi

    beansblacktsi Proven Member

    284
    48
    Joined Apr 2, 2007
    Lincoln, Nebraska
    I never did try adding holes, but Im sure it will help if you end up having any issues. I never had overheating issues with no thermostat but then again I have a really nice big dual pass radiator. My car was built for doing Rocky Mountain Raceweek so very similar to your drag week build.
     

    2K  4

    1992 Plymouth Laser RS Turbo AWD
    9.524 @ 145.390 · 1G DSM
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  2. Got Grip

    Got Grip Proven Member

    260
    157
    Joined Sep 17, 2002
    Philadelphia, Pennsylvania
    Any info on your radiator? I’d be interested in seeing more about your build!
     

    Street Build 3K  1

    1995 Mitsubishi Eclipse GSX
    9.99 @ 148 · 2G DSM

    4K  7

    2008 4G63 Dragster
    6.474 @ 210.18 · 4G63t Swapped

    2K  17

    1995 Mitsubishi Eclipse GSX
    10.03 @ 148 · 1G DSM
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  3. beansblacktsi

    beansblacktsi Proven Member

    284
    48
    Joined Apr 2, 2007
    Lincoln, Nebraska
    Its an Afco Racing 80133N with a custom shroud and a Spal 13in puller fan. The car is a budget friendly steel rod 2.0L with straight cut gear 2g auto, s472 now, 8.50 cage and its on Ms3Pro. Ill update my profile to make things easier. Don't mind the mess in the picture, doing some changes this winter.
    laser bay 1.jpg
     

    2K  4

    1992 Plymouth Laser RS Turbo AWD
    9.524 @ 145.390 · 1G DSM
    Loading...
    camocorvette and turbotalon1g like this.
  4. bastarddsm

    bastarddsm Proven Member

    5,266
    1,087
    Joined Aug 26, 2003
    Mendota, Illinois
    That extra coolant pressure helps keep the cylinder walls intact. I had a 30psi on my 1g, and was shocked how fast ir burried it. But seriously, 100psi in the cooling jacket does nothing but prevent localized boiling/cavitation, and supports the cylinder wall. 100psi, might add more strength than a 0.020" overbore removes
     

    Showcar Build 6K  1

    1991 Eagle Talon N/T
    9.805 @ 144.00 · 1G DSM
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    bling5tatus likes this.
  5. Got Grip

    Got Grip Proven Member

    260
    157
    Joined Sep 17, 2002
    Philadelphia, Pennsylvania
    Okay, I really suck at updating this thread, I need Chris to keep on my case about it. :)

    As I mentioned quite a bit earlier in this thread, DragWeek 2019 didn't go as planned and I blew the head gasket and melted the head. At the time I thought the cause of the failure was that I didn't double check the ignition timing in my last minute thrash. In the back of my mind, this concerned me because the failure was much more catastrophic than "just" 10 degrees off on timing at semi-low boost and the car also didn't seem to be making any power for the setup. But, given that the car wasn't running and I tore down a good portion of it at DragWeek to see if I could fix it, I couldn't really dig too much into what went wrong.

    Fast Forward to a couple weeks ago and I got my new engine from Buschur Racing for the car and put it all back together. I pretty much did everything I wanted to the car last year so I didn't really make any changes to it with just a couple exceptions. I noticed my several year old alternator was struggling to keep up so I got a new Galant 90 amp alternator and I put that on. Also, the radiator I had in the car worked pretty good but I still wanted more cooling and it also bulged some when the head gasket blew, so I found a larger radiator for the car (I can post more on that later).

    Once everything was in the car, it fired right up as if nothing had ever happened and I was stoked. I go to set the ignition timing and its within a degree of dead on with the same settings and same sensors as last year. I find it hard to believe that just changing the block (same crank, same sensor, same front cover, same mount, etc) would move the timing more than a couple degrees. Well that kind of sucks, now I don't know what caused the failure.

    I decided to do another step I skipped last year and I checked timing drift with RPM. To my surprise, I discovered the timing was drifting over 30 degrees by 5000 RPM's. That means the car was adding 30 degrees of advance on top of what I had it set to by 5k, and likely approaching 60 degrees of additional advance by 9k.

    So now I'm both happy and upset. This explains completely why the failure was so bad and also explains why the car wasn't making any power, but now I had to figure out what I did wrong. I turned out I had the wrong trigger edge selected for my ignition in Haltech. I had carried over some settings from the dragster (which uses an M&W box) and didn't think to verify what the Arc2 was expecting. In my defense, the Arc2 is switchable and its not labeled Rising Edge / Falling Edge, it's labeled by the type of coil which is a little confusing. I had to dig through the instructions to figure out what that dip switch even did. Lesson learned.

    I'll do my best to get some more updates and finished pics. I'm hopeful DragWeek still happens this year!

    TLDR; I screwed up big time with the ignition trigger edge settings and cost myself a motor, but its fixed now and I took the car for its maiden voyage of 2020 this past weekend.
     

    Street Build 3K  1

    1995 Mitsubishi Eclipse GSX
    9.99 @ 148 · 2G DSM

    4K  7

    2008 4G63 Dragster
    6.474 @ 210.18 · 4G63t Swapped

    2K  17

    1995 Mitsubishi Eclipse GSX
    10.03 @ 148 · 1G DSM
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  6. bling5tatus

    bling5tatus Proven Member

    1,581
    104
    Joined Sep 23, 2005
    DFW/Austin, Texas
    Funny, not funny. We all do stuff like this and I think it's what keeps you sharp in the end. I would bet my bottom dollar that you never make that same mistake again.
     

    Street Build 2K  1

    1989 Dodge Colt GT
    manual · 4G63t Swapped

    Street Build 2K  1

    1991 Eagle Talon TSi
    fwd · manual · 1G DSM
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  7. Got Grip

    Got Grip Proven Member

    260
    157
    Joined Sep 17, 2002
    Philadelphia, Pennsylvania
    You can be sure of that! In reality, it was mostly just due to rushing. Sure, I might have made the mistake in initial setup, but a normal test I do on any car is verify timing drift with RPM. When I got the car running the day before the event and still had sooo many loose ends to tie up, that was a corner I cut. A very expensive corner.
     

    Street Build 3K  1

    1995 Mitsubishi Eclipse GSX
    9.99 @ 148 · 2G DSM

    4K  7

    2008 4G63 Dragster
    6.474 @ 210.18 · 4G63t Swapped

    2K  17

    1995 Mitsubishi Eclipse GSX
    10.03 @ 148 · 1G DSM
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    camocorvette likes this.
  8. Ludachris

    Ludachris Founder & Zookeeper

    7,197
    1,379
    Joined Nov 12, 2001
    Roseville, California
    That's a hell of a price to pay for having the wrong trigger edge selected. Hopefully other Haltech users know about this. As frustrating as it is knowing that it was preventable, at least you know what happened. It's never a good feeling when you can't diagnose the cause of a failure. Congrats on getting it all figured out and running again.
     

    Street Build 9K  0

    1997 Eagle Talon TSi AWD (sold)
    manual · 2G DSM

    Road Race Build 8K  10  23

    1991 Mitsubishi Eclipse GSX
    435.0 whp · 399.2 lb/ft · 1G DSM
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    mountain_man likes this.
  9. Got Grip

    Got Grip Proven Member

    260
    157
    Joined Sep 17, 2002
    Philadelphia, Pennsylvania
    It's an any ECU concern. Anyone setting up any aftermarket ECU in any car needs to be conscious of trigger edges. They also apply to cam sensors, crank sensors and ignition outputs, although I think only the ignition output one would cause what I did.
     

    Street Build 3K  1

    1995 Mitsubishi Eclipse GSX
    9.99 @ 148 · 2G DSM

    4K  7

    2008 4G63 Dragster
    6.474 @ 210.18 · 4G63t Swapped

    2K  17

    1995 Mitsubishi Eclipse GSX
    10.03 @ 148 · 1G DSM
    Loading...
    camocorvette and Ludachris like this.
  10. Ludachris

    Ludachris Founder & Zookeeper

    7,197
    1,379
    Joined Nov 12, 2001
    Roseville, California
    I suppose those who are setting up an aftermarket ECU (and aren't in a rush :D) will know about it.
     

    Street Build 9K  0

    1997 Eagle Talon TSi AWD (sold)
    manual · 2G DSM

    Road Race Build 8K  10  23

    1991 Mitsubishi Eclipse GSX
    435.0 whp · 399.2 lb/ft · 1G DSM
    Loading...
  11. Got Grip

    Got Grip Proven Member

    260
    157
    Joined Sep 17, 2002
    Philadelphia, Pennsylvania
    I'd hope so! haha
     

    Street Build 3K  1

    1995 Mitsubishi Eclipse GSX
    9.99 @ 148 · 2G DSM

    4K  7

    2008 4G63 Dragster
    6.474 @ 210.18 · 4G63t Swapped

    2K  17

    1995 Mitsubishi Eclipse GSX
    10.03 @ 148 · 1G DSM
    Loading...
  12. Ludachris

    Ludachris Founder & Zookeeper

    7,197
    1,379
    Joined Nov 12, 2001
    Roseville, California
    And by the way @Got Grip, where is the DSMtuners decal located on the car? I haven't seen a photo with it yet. :) I swear I sent you a couple. Is my memory failing me again?
     
    Last edited: Jul 16, 2020

    Street Build 9K  0

    1997 Eagle Talon TSi AWD (sold)
    manual · 2G DSM

    Road Race Build 8K  10  23

    1991 Mitsubishi Eclipse GSX
    435.0 whp · 399.2 lb/ft · 1G DSM
    Loading...
  13. Got Grip

    Got Grip Proven Member

    260
    157
    Joined Sep 17, 2002
    Philadelphia, Pennsylvania
    :coy:
     

    Street Build 3K  1

    1995 Mitsubishi Eclipse GSX
    9.99 @ 148 · 2G DSM

    4K  7

    2008 4G63 Dragster
    6.474 @ 210.18 · 4G63t Swapped

    2K  17

    1995 Mitsubishi Eclipse GSX
    10.03 @ 148 · 1G DSM
    Loading...
  14. Ludachris

    Ludachris Founder & Zookeeper

    7,197
    1,379
    Joined Nov 12, 2001
    Roseville, California


    :)
     

    Street Build 9K  0

    1997 Eagle Talon TSi AWD (sold)
    manual · 2G DSM

    Road Race Build 8K  10  23

    1991 Mitsubishi Eclipse GSX
    435.0 whp · 399.2 lb/ft · 1G DSM
    Loading...
  15. ErikTande

    ErikTande Supporting Member

    1,317
    306
    Joined Dec 17, 2012
    Centennial, Colorado
    Drag Week 2020 got cancelled :(
     

    Street Build 1K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM

    4K  7

    1990 Mitsubishi Eclipse GSX
    13.2 @ 105 · 1G DSM
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  16. Got Grip

    Got Grip Proven Member

    260
    157
    Joined Sep 17, 2002
    Philadelphia, Pennsylvania
    Ugh, I know. It might be a good thing for me at the moment, I'm battling some transmission issues that I need to sort out.
     

    Street Build 3K  1

    1995 Mitsubishi Eclipse GSX
    9.99 @ 148 · 2G DSM

    4K  7

    2008 4G63 Dragster
    6.474 @ 210.18 · 4G63t Swapped

    2K  17

    1995 Mitsubishi Eclipse GSX
    10.03 @ 148 · 1G DSM
    Loading...
    bling5tatus likes this.
  17. bling5tatus

    bling5tatus Proven Member

    1,581
    104
    Joined Sep 23, 2005
    DFW/Austin, Texas
    Can you talk more about the issues you're facing?
     

    Street Build 2K  1

    1989 Dodge Colt GT
    manual · 4G63t Swapped

    Street Build 2K  1

    1991 Eagle Talon TSi
    fwd · manual · 1G DSM
    Loading...

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