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Autocross Build Silvr's boosted 420a

Year:
1998
Model/Trim:
Mitsubishi Eclipse N/T
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  1. BLACK'98DSM

    BLACK'98DSM Proven Member

    1,555
    630
    Joined Feb 9, 2019
    Hoover, Alabama
    Which event are you attending?
     

    Road Race Build 3K  10  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    129  3

    2008 Tomberlin Crossfire 150R
    rwd · manual · Misc Vehicles

    167  6

    2008 Tomberlin Crossfire (325 swapped)
    rwd · manual · Misc Vehicles
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  2. silvreclips

    silvreclips Proven Member

    1,144
    326
    Joined Jul 19, 2005
    Greenville, South Carolina
    I run with a local autox club here. It's not affiliated with the scca but they follow the same rules for the most part. Most of the events are fairly small, 50 to 100 entries. The cost is half of what my local scca events are and I get twice the runs. The only downside is the lot size. Both are on the small size unfortunately.

    And even the 16g in a 6cm housing has to much lag
     

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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    BLACK'98DSM likes this.
  3. silvreclips

    silvreclips Proven Member

    1,144
    326
    Joined Jul 19, 2005
    Greenville, South Carolina
    Unfortunately the first event which was scheduled for tomorrow (3/31) has been cancelled, and the rest are on hold until this situation starts improving. The car is pretty much ready at this point, had the wife out in the garage helping align the car. That came out great. This is what I settled on for now.

    Front camber = did not measure
    Rear camber = -1.1 deg
    Rear toe = 1/8" toe out
    Front toe = 5/32" toe out

    New tires are mounted and on the car. I drove the car some yesterday to put a few hard miles on it. Everything felt good and solid. I am excited to get it back on the track this year.

    I changed my wastegate spring some to get the boost lower in 1st so it doesn't spin so bad. Low boost can go down to 8psi, and I set high boost down to 18psi. Megasquirt controls the EBC which is great, but the issue I'm seeing is the boost response. When the car is targeting high boost, the wastegate is opening early and the car is slowly creeping up to 18psi by 5k. I'm going to make some changes in MS that should take care of that issue.

    I also looked at why launch control no longer works. It's a pain trying to go back and figure out how I wired this ECU. Luckily I made this binder as I was going along, which was helpful. Launch control and flat shift are now working again. But the stock clutch switch is to low on the pedal so I'm going to try and move or replace that with something different.

    I have decided that the brake pads I am running are not ideal for autox use. I did a few hard stops from about 70mph, I could put the brake pedal on the floor and not lock up the tires. Not only that the car just didn't feel like it was stopping that quick. After 3 of these stops, they got some heat in them and they were great. Good initial bite and plenty of stopping power. I'll do some more testing on this later. I'm currently running stoptechs 309 pads.

    IMG_20200322_170756.jpg IMG_20200328_115056.jpg IMG_20200322_170710.jpg
     

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  4. ec17pse

    ec17pse Freelancer

    3,932
    1,793
    Joined Nov 1, 2008
    London, UK, Europe
    The best way to set this is doing the chassis method! Get a digital angle finder like a wixey and level it on the subframe at the top which is chassis level and then on each setup attach it to the brake rotor! This gives you 100% chassis camber for static and works very well! I started doing this a while ago and had it check out on a hunter system and its bang on, this way also means if your on an angle surface your specs are always measured to chassis and not floor.

    Just an idea for you to trial. I do this alot on the front also if i cannot get a level surface and it does pretty good for me so just passing on the idea to you to help assist. It might help speed up and take out any errors in string etc
     

    Road Race Build 10K  10  56

    1997 Mitsubishi Eclipse GST
    175 whp · 180.1 lb/ft · 2G DSM
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  5. silvreclips

    silvreclips Proven Member

    1,144
    326
    Joined Jul 19, 2005
    Greenville, South Carolina
    @ec17pse I started out trying to use a digital angle finder but I didn't gain much confidence with it. It wasn't a cheap unit either, it's accuracy was suppose to be 0.05deg but I was seeing a few tenths difference depending on which side of the gauge I used.

    My string method hopefully has me pretty close. I'm just happy the car drives straight and I don't have to set up my string box again.
     

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  6. silvreclips

    silvreclips Proven Member

    1,144
    326
    Joined Jul 19, 2005
    Greenville, South Carolina
    Now that all of the races are getting cancelled. I had some free time to fix something that has bugged me for a long time. I have launch control and NLTS set up in megasquirt, but the switch at the end of the pedal is deactivating before the clutch even starts to grab. The car ends up way above the launch limit by the time the clutch grabs. I pulled the clutch pedal off and added a micro switch to the top of the pedal. I have the new switch wired in but haven't tested it out yet. I'll hopefully see how it goes this weekend.

    IMG_20200402_174659.jpg
     

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  7. silvreclips

    silvreclips Proven Member

    1,144
    326
    Joined Jul 19, 2005
    Greenville, South Carolina
    Just been playing around with the car some over the last week. Not much else to do, most of the races I attend are tighter slower tracks and I end up spending a lot of time around the 2- 4k rpm range fighting to keep the boost up. I swapped between the E316g and 14b, tested 7cm and the 6cm housing to see what the spool difference was between all of these combination. I only tested spool in 2nd gear getting on the throttle at 2k. Strange enough all of the combinations show very similar results. Plotting rpm vs boost pressure they all had very similar trends. If you look at how fast the car pulled through the rpm range, from say, 2.2k to 3.6k, there was only a tenth or so difference. I'll post the graphs when I turn my computer back on.

    I also noticed today that the rear right tire has been scrubbing a little on the fender. The picture makes it look worse than it is, that line rubs off, it's paint from the fender. But Ill need to roll them or something to get some clearance. I may pull the shocks and move the tire up and down and make sure it clears.

    IMG_20200417_165905.jpg

    In other garage news, I have been using a 60gal oil less compressor bc it was free, but it snaps rods ab once a year. I think the crank is bent a little causing them to fail. Either way, the rods now aren't available as cheap as before so I wanted to upgrade to something a little better. I found this compressor on FB for 100. Guy said it didn't run, but figured I would give it a shot. Got it home, wired it up and it runs perfect. Not sure what the guy was doing before but I got a steal on it.

    Still have some more cleanup to do on it, and change the oil on it, but should have it hooked up and running by the end of the weekend.

    IMG_20200417_194150.jpg
    IMG_20200417_194137.jpg
     

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  8. silvreclips

    silvreclips Proven Member

    1,144
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    Joined Jul 19, 2005
    Greenville, South Carolina
    Compressor update: I started cleaning the tank up and found a small hole in the bottom. I decided that the best option was to reuse my old 60 gal tank since it was still good. I cut the mounting plate off of the busted tank, cleaned it up and welded it to the old tank mounting plate. Tried to match the paint the best I could. Had to make a copper discharge tube to route the compressor to the tank check valve. Its all working good now.

    Back to the car: I bought a cheapo fender roller from Amazon for about $42, I don't know how they can sell this so cheap. It's cheap, but it's really not bad for the price. Had to grind on it a little bit to free up the roller, but everything else seems to be pretty solid.

    The rear is a total pain in the ass to roll. The control arm could not be more in the way. After fighting this for a while I was able to start working that inner lip up away from the tire. I think I'm about half way there, but still have some more to go.

    IMG_20200418_163913.jpg IMG_20200419_122230.jpg IMG_20200421_201841.jpg
    IMG_20200426_124613.jpg IMG_20200501_180831.jpg
     

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  9. silvreclips

    silvreclips Proven Member

    1,144
    326
    Joined Jul 19, 2005
    Greenville, South Carolina
    Both fenders are now rolled. The cheap tool worked out great. I read a few different comments about rolling the rear fenders in these cars before I started. Some said you can do, others said it was impossible even with the tool. I bet most of the difficulty is because of how in the way the upper control arm is. I found out that it is possible but there are a few tricks to it. One thing that really helped was to have the strut out of the car and a jack under the knuckle. This allowed me to move the hub up/down and get as much clearance as possible for the roller. As you angle the roller to bend the lip further up, you can raise the knuckle to push the control arm up into the body.

    It took about 2 hours per side. It could be done much quicker the second time around. I had no issues with paint cracking. I didn't use heat either, it was a nice warm day here so maybe that helped. It did tear all of the seam sealer off of that joint. That will be an easy fix.

    I still plan on pulling the rear springs back off the struts and seeing where the bump stops stop the car. My rear stops are pretty chewed up so I may need to replace them.

    The first pic is the left side of the car before being rolled. The next pic is after on the right side.

    IMG_20200503_163848.jpg IMG_20200503_163818.jpg
     

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  10. silvreclips

    silvreclips Proven Member

    1,144
    326
    Joined Jul 19, 2005
    Greenville, South Carolina
    If all goes well, the next scheduled Autox event is June 9th, and it hasn't been cancelled as of yet. Hoping that we can start this season up soon.

    I've been messing around in the garage some more check tire clearance after rolling the fenders. The rear tires clear but the bump stops are so worn down from previous damage that the tire tucks more than I want it to. So I ordered 4 new bump stops to just replace them all. I also checked the front and found out at full compression the front tires can touch the fenders. Not a good thing, but hopefully new bump stops that aren't cut will fix this.

    IMG_20200520_122821.jpg

    IMG_20200520_122753.jpg

    Here is the front.

    IMG_20200520_204853.jpg

    Now for the bad news... While removing the shock, the washer and lock washer popped out of my hand.. I found the washer, but the other is still missing. I'm thinking it may have fallen into the timing belt. If I can't find it, looks like I'll be tearing into the timing belt to either find it or make sure it's not in there.

    IMG_20200520_204902.jpg
     

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  11. TK's9d2TSi

    TK's9d2TSi Supporting Member

    3,088
    1,203
    Joined Sep 11, 2017
    Cincinnati, Ohio
    I hate it when that happens. Hope you find it! I hate not running timing covers. :beatentodeath::D
     

    379  3

    2000 Jeep Cherokee Sport - Classic
    awd · automatic · Misc Vehicles

    423  4

    93 Civic 4 Door -sold-
    fwd · manual · Misc Vehicles

    Street Build 3K  6

    1992 Eagle Talon TSi AWD
    12.2 @ 120 · 1G DSM
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  12. silvreclips

    silvreclips Proven Member

    1,144
    326
    Joined Jul 19, 2005
    Greenville, South Carolina
    Luck must be on my side today! I ended up finding the missing washer. Unfortunately for us 420a people, the outer timing cover is all 1 piece. So either you cut it like I did, or you never access your cam gears without taking everything apart. It's been like that for about 13 years with no issues. Maybe I should work on some type of cover.

    Pic of the missing washer.
    IMG_20200521_125155.jpg

    Also, the new bump stops arrived today, so I should be able to get the suspension back together this weekend.

    IMG_20200521_134626.jpg
     

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  13. TK's9d2TSi

    TK's9d2TSi Supporting Member

    3,088
    1,203
    Joined Sep 11, 2017
    Cincinnati, Ohio
    Oh I see. Glad you found it :thumb:
     

    379  3

    2000 Jeep Cherokee Sport - Classic
    awd · automatic · Misc Vehicles

    423  4

    93 Civic 4 Door -sold-
    fwd · manual · Misc Vehicles

    Street Build 3K  6

    1992 Eagle Talon TSi AWD
    12.2 @ 120 · 1G DSM
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  14. silvreclips

    silvreclips Proven Member

    1,144
    326
    Joined Jul 19, 2005
    Greenville, South Carolina
    Race season has finally began for us in the southeast. First event was 6/9. I was really excited to see how the car was going to perform with all of the changes made.

    The night before I checked the car over good, made sure nothing was loose and all of the fluid levels were good. Drained the catch can from the last few events. This car really likes to shoot oil out of the valve cover vents when on the throttle during a turn.

    IMG_20200609_122419.jpg

    I should have taken more pictures of the event but it just slipped my mind. I only got 1 of the car right as I was leaving. This was a Tuesday night event, so started about 530 and ended at 11pm. Because of the virus situation, the event was capped at 60 cars, meaning we each got 8 runs in. The event did not count for point, so basically a test and tune.

    IMG_20200609_223621.jpg

    The car ran perfect, had no issues with it whatsoever. Using launch control off the line worked out really well. The car launched hard for a FWD and not lifting for the shift to second kept the car pulling hard. Handling wise, the car felt pretty good. My driving wasn't the best, I made some poor line choices that really cost me a lot of time. One of my friends was also running the event and was recording video and GPS so it was good to compare our runs. He is a better driver than I am so maybe I can pick up some pointers. I picked up a 10hz GPS over the winter in hopes to get some useful data from it. I thought I had it all worked out, but it was a huge failure during the event. I had it paired to the trackaddict app to record the run, and also to megasquirt to record position. And I think that was the issue. Both logs show GPS signal totally dropping out throughout the whole run. All of the data it collected was useless. I'll get that sorted out before the next event on 6/30. This one is also not for points.

    This is what 1 of my runs looked like, it missed the whole first section and then cut through the tree line.

    Screenshot_20200623-100817.png

    Here is the video of my fastest run. Ended up 1st in class out of 2. But mid pack overall. I spun the car going into the first slalom on my second run, the rear just didn't have enough heat in it yet, and it made me a little nervous on that off camber sweeper, so I babied the car some in that section. They run this same course all year on the night series, so I'll get another shot at it. This is actually the same course as last year to.

    Comments and tips are always welcome.

     
    Last edited: Jun 23, 2020

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  15. Ludachris

    Ludachris Founder & Zookeeper

    3,780
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    Joined Nov 12, 2001
    Roseville, California
    That was a pretty wide open, high speed course. Looks like fun.
     

    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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  16. silvreclips

    silvreclips Proven Member

    1,144
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    Joined Jul 19, 2005
    Greenville, South Carolina
    It's a small lot, but they make the best of it. I was getting to about 48mph before the first slalom, and after the tight 180 coming back up the hill I was at about 53. Very fast for the lot size.
     

    Autocross Build 567  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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