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'89 Colt GT - Power & MPG
http://4g61t.org/forum/viewtopic.php?f=64&t=37478
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Author:  xxNocturnalxx [ Thu Aug 15, 2013 1:41 am ]
Post subject:  Re: '89 Colt GT - Power & MPG

I am curious as to how the rod bearing spun. I know it's a long story but I would like to learn from it.

Author:  DSMERwCOLT [ Thu Aug 15, 2013 9:25 am ]
Post subject:  Re: '89 Colt GT - Power & MPG

I agree with Nocturnal.

Author:  slow4dr [ Thu Aug 15, 2013 11:11 am ]
Post subject:  Re: '89 Colt GT - Power & MPG

When the problem actually occurred I was just driving along on the highway in 5th gear doing 70 mph. I can't imagine I overreved it. I haven't spun it over 7K. I was logging A/F on the Zietronix the morning it happened and spun it to 6925 (according to the log). I very rarely take it past 6500 because it just isn't making power up top. Just given the close proximity of taking it that high has me wondering.

I had fuel delivery issues so maybe just maybe it had detonated to the point of damaging the bearing.

I am going to try and get the engine out in the next day or two so I can start tearing it down.

Author:  slow4dr [ Tue Aug 20, 2013 3:01 pm ]
Post subject:  Re: '89 Colt GT - Power & MPG

I decided to keep the Colt so I started swapping the engine, ECU, and brakes over the weekend.

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Spun bearing engine is out
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5 lug and big 2 piston calipers going in
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Author:  slow4dr [ Thu Aug 29, 2013 1:23 pm ]
Post subject:  Re: '89 Colt GT - Power & MPG

I gave up on the 5 lug conversion. The front went pretty well until it came time to retaper the tie rod end hole on the hub. I have a tie rod end reamer here at work that I used. I had my doubts that it would work and those doubts were confirmed after I started reaming it. The reamer was not able to penetrate all the way down the hole without making the hole too big for the tie rod end. I wasn't about to only ream halfway down the hole and leave half the shank unsupported.

Last night though, I started fiddling with the rear brakes after reading around that others have redrilled the rear hubs. I had to see for myself so I tore apart one side of both the Colt and the Talon. The face of the hub just doesn't have enough meat to redrill them safely so I just put the car back to 4 lug. Like others have mentioned the Talon hub is too large to work on the Colt.

I drove it to work this morning and did a few logs in Link. It is running a bit lean (high 11's low 12's) around 5K rpm so it is pulling timing. In spite of this the car feels strong. I will spend some time fine tuning over the next week and I then get it on the dyno.

Author:  slow4dr [ Fri Sep 06, 2013 9:52 pm ]
Post subject:  Re: '89 Colt GT - Power & MPG

Well, I am still fine tuning with Link. Part throttle is still a little lean but WOT is pretty much spot on while idle is still all over the place depending on ambient temps. When it's warm out (90+) it will idle fine but in the morning on my way to work when it's in the 70's & 80's not so much. I've been reading as much as I can the ECM Tuning forums and I am starting to get a good handle on all the controls.

I also spent the week brainstorming this whole 5 lug issue. I just bit the bullet and ordered the '92 Sedan rear hubs and a Mustang II bump steer bolt kit from AFCO. We have a reamer at work specifically designed for the Mustang II Tie Rod taper so I feel a lot better about going this route. I just needed to get a couple 5/8" rod ends (also from work) and then I threaded a sleeve to couple the rod end(5/8 LH) to the inner tie rod(14mm x 1.5). So basically I ended up with a complete bump steer kit just to fix the tie rod taper issue I was having.

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Unfortunately, I solved one problem but created another. The new tie rod set-up is longer overall than the OEM tie rod end. So now I will have to cut the inner tie rod to get proper toe.
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I have some 16x7 +40 MB wheels from the last car I had that have been collecting dust for 2 years. I can't handle chrome so I just threw some Matte black on them.

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Author:  slowdsm [ Sat Sep 07, 2013 12:39 am ]
Post subject:  Re: '89 Colt GT - Power & MPG

I wouldnt cut them.. u might cut em to short..better to have more adjustment than less.




Steve

Author:  slow4dr [ Sat Sep 21, 2013 8:07 pm ]
Post subject:  Re: '89 Colt GT - Power & MPG

I am almost finished with the 5 lug swap up front. All I need is a tap that matches the inner tie rod threads. It is not 12mm x 1.25 as previously thought. As soon as I figure it out I can make my adapters. I also need to notch the struts a little bit more to get proper camber.

The rear will have to wait til next week.

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I've been wanting to put the 2G airbox back on the car because the intake air temps have been crazy high with the open filter. So I took a little time today and made it happen.

I had already made the mounts for the box a while back.
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The previous owner had already cut this rectangle opening I just modified it a little bit to fit a 4" round tube.
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I used a 3.5" hose to make the template. (better to start with the hole too small and slowly work it to the proper size)
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I had some 4" pipe sitting around to cut up.
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Here it is riveted in place. Eventually I will weld it into place and fill in the holes.
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I also had a 4" 90 degree left over from another project. I just turned it forward away from the tire. In the future I could make a ram air with a funnel mounted in the blinker hole.
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Bottom view
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Top view, looking through the now modified air box.
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The fuse box had to be moved and I still need to make a proper battery tray but I managed to cram 10 lbs of ish in a 5 lb bag.
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Author:  slow4dr [ Mon Oct 14, 2013 1:40 pm ]
Post subject:  Re: '89 Colt GT - Power & MPG

I made a little pit stop by my buddy's shop on Friday as they prepared a couple 900+ HP Challengers to run the Mojave Mile. The owner of one of the Challengers also has a C6 Z06 so after a little taunting from the guys in the shop we went out and made a couple runs. I have been overly curious as to how my car would fair against a car known to trap 120+ in the 1/4. I gotta say that I was a little disappointed in the outcome.

http://www.youtube.com/watch?v=mshzxR44LeE

Author:  xxNocturnalxx [ Mon Oct 14, 2013 1:48 pm ]
Post subject:  Re: '89 Colt GT - Power & MPG

Z06 stock? Either way that's not bad man, not bad at all. I bet our cars would be just about the same, would be a good race 8)

Author:  slow4dr [ Mon Oct 14, 2013 2:12 pm ]
Post subject:  Re: '89 Colt GT - Power & MPG

Quote:
Z06 stock? Either way that's not bad man, not bad at all. I bet our cars would be just about the same, would be a good race 8)

Yeah, the Z was completely stock, all the way down to the run flats. I've been looking through the log and there is definitely some room for improvement.

Author:  slow4dr [ Mon Jun 08, 2015 11:54 am ]
Post subject:  Re: '89 Colt GT - Power & MPG

Been a while since an update. The car was parked for a year or so while I drove my new to me IS300/2JZGTE. However, I pulled the Lexus apart for some updates so the Colt got moved back to daily status. This car is just so damn much fun to drive. I went to set up our booth at this past weekend's NMCA event at Fontana on Friday. As I was leaving I stopped by the Autocross to hang out with my friends from Racing Byrds (they run the Autocross for Hotchkis). The course was all set up already so I made a few laps. Had a blast with the car being so tail happy with bald tires out back.

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HAHA, look at that terrible camber curve

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Saturday night was the local DSM meet.

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Author:  slow4dr [ Mon Jan 04, 2016 5:36 pm ]
Post subject:  Re: '89 Colt GT - Power & MPG

It's been forever since an update but a week or two after my last post I killed the engine. The cars been collecting dust as I've been working on the house. Well, to my surprise I open the shop this weekend and find one of the cupboards came off the wall and fell onto the rear fender. I am honestly glad it was the Colt and not the IS but it still sucks. Especially when you find 1/4" thick bondo from a poorly fixed previous incident. I usually take these moments and turn around into a positive so I am very seriously thinking about installing fender flares. Now that I have a proper daily I think this car is going to get a bit of a race status transformation.

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Author:  sharkmobil [ Tue Apr 26, 2016 2:19 am ]
Post subject:  Re: '89 Colt GT - Power & MPG

Nice thinking. What are the candidates for the flares?

Author:  slow4dr [ Tue May 03, 2016 3:07 pm ]
Post subject:  Re: '89 Colt GT - Power & MPG

Quote:
Nice thinking. What are the candidates for the flares?
I have been looking around at offroad sites trying to find a close match. Worst case scenario I will just cut, stretch, and fill the existing fenders. I'd like to get 245's all around but if I can go wider I certainly will try.

I may as well let the cat out of the bag. I picked up an AWD donor. I'm hoping to swap front suspensions as well. Gonna make her into an Autocross bruiser.

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A little rustier than I had hoped but for the price I can't complain.

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The subframe actually fit into the blast cabinet.

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