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 Back in a Formula Again 
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Joined: Wed Sep 03, 2014 8:59 pm
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Post Re: Back in a Formula Again
Didn't really feel like getting too involved in working on the car today so I decided to just tinker & take some more measurements.

First thing I checked was the deck height on bank 2 now that the head is off that side.......& who would have guessed that the deck heights are not even from one bank to the other? Lol! :? Bank 2 measures .025 in the hole.

Putting those measurements into the same compression ratio calculator results in this.

Image

I also got looking closer at the 083 heads I removed from the car & noticed some differences to the 083 heads that I ported (surprised that there seems to be variations of the 083!)

Each intake port of the heads I pulled from the car has a very pronounced ridge protruding easily 1/8" or better (it doesn't look as bad in the picture as it is).....this was not present on the heads I ported. Perhaps the difference from these stock 083's to my ported ones will be greater than I had anticipated!

Image


Last edited by auto_god on Wed Dec 21, 2016 7:23 am, edited 1 time in total.



Mon Dec 19, 2016 8:28 pm
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Post Re: Back in a Formula Again
Had 1 of each head side by side out on the bench in my shed today swapping springs, locks, shims, retainers etc from the original head to the ported one & as I suspected, there are definitely variations on the 083 head.

Image

Image

Without putting them on a flow bench its impossible to say which one is actually better, but visually I would think the 083-2 to flow better stock due to not having the huge ridge in each intake port.

Doesn't really affect my progress at all, just thought it to be interesting info that I haven't come across yet in all my googling!


Tue Dec 20, 2016 6:26 pm
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Post Re: Back in a Formula Again
Excellent work you have done. You gave this car a seond chance and gave her the treatment that she deserves.


Wed Jan 04, 2017 12:20 pm
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Post Re: Back in a Formula Again
chevypower91 wrote:
Excellent work you have done. You gave this car a seond chance and gave her the treatment that she deserves.


Lots of things to do yet!

Originally all I planned to do this winter was put new T-top seals in the car, but my leaking manifold/ported heads project has delayed that a bit. I'm currently about 80% finished with the head swap (all I have left at this point is to put the runners & plenum back on, cap/wires/plugs back on, & put the y-pipe & cat back in.....couple hours should have it running again.....hopefully!! LOL!)

Assuming that all goes well, I do plan to attack the T-top seals still, but....one thing at a time!!

On one hand I feel like I'm pointlessly rushing to complete things, but on the other hand, I had the car out in March last year, so if the same holds true this year I only have a couple months left! I don't plan on wasting any time I could be out enjoying the car due to not having my projects complete!


Wed Jan 04, 2017 10:21 pm
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I tackled that t-top seal job about 7 years ago. I ordered the GM stuff and although highly expensive it fit perfect.
I also wished I had some rope style caulking that body shops use as the guide I used called for it to be applied on the
the corners under the metal panel of the seals. Some how I got it to be leak free. Good luck.

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Sat Jan 07, 2017 5:01 pm
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Post Re: Back in a Formula Again
Corp Z wrote:
I tackled that t-top seal job about 7 years ago. I ordered the GM stuff and although highly expensive it fit perfect.
I also wished I had some rope style caulking that body shops use as the guide I used called for it to be applied on the
the corners under the metal panel of the seals. Some how I got it to be leak free. Good luck.


My motives for tackling the T top seals are a little different. Since I bought the car back in 2014 its only been wet once (the car needed a major cleanup after sitting in the previous owners garage stationary for over 5 years), so being leak proof isn't a major priority to me. My motive is primarily a cosmetic one. The previous owner tells me someone attempted to break into the car years before damaging the T top seals all down the drivers side A pillar........looks like crap!!


Image

The T tops in this car are the Cars & Concepts tops which is what is putting this project higher up on my priority list. Apparently Sunroofdoctor bought up the remaining supplies of seals from Cars & Concepts years ago.......these supplies obviously aren't going last forever so I'd like to pick some up before supplies disappear!


Sun Jan 08, 2017 10:48 am
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Post Re: Back in a Formula Again
Pleased she's all back together and running again!

After having everything apart and checking to ensure the block and heads were true I made the decision to go to a slightly thinner head gasket to tighten the quench up some.

Here is where the final result wound up.

Image

Not a drastic difference, but the extra compression seems to have deepened the tone of the motor some which I'm not disappointed about!

During re-assembly I popped for some nice thick Summit brand copper header gaskets which seem to have finally sealed the headers up. The gaskets that came with the headers were complete garbage and leaked pretty much immediately. I replaced those with some generic FelPro that the parts store at the corner happened to have in stock at the time which also leaked after a very short period of time too. The leak from the FelPro's wasn't horrible so I just lived with it for the summer. Hoping that issue is finally resolved!

So, given that I have at least another month or more before being able to drive it again and touch up the tune, I've decided to tackle another nagging issue once and for all........time to upgrade to a 3 wire heated o2 sensor!

I shouldn't really say its been a nagging issue. I had my tune dialed in well enough that it never caused any driveability issues, but any time I would start the car it would never go into closed loop until the car was driven for several minutes (sitting idling it would never go closed loop no matter how long it sat idling). On cooler days in the spring & fall, or when leaving for work early in the morning, coming to a stoplight and idling for a couple minutes would also result in the o2 sensor cooling off and car going back to open loop. While it didn't cause any driveability issues, I'm certain the fuel economy will improve if the car can be made to go into closed loop quickly and stay there, and I'm also looking ahead to the summer of 2018 when the car will need an emission test again. The last time it was tested it just barely squeaked by the idle limits (likely due to being in open loop), but breezed through the 2500 rpm part of the test (as it would have gone into closed loop at that point). I'm actually pretty interested to see what sort of drivability improvements come from upgrading to something a little more modern (if any), as the car did drive quite well to begin with. Parts should be arriving this week for this upgrade!


Mon Feb 06, 2017 4:20 pm
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Post Re: Back in a Formula Again
Spent about 45 min this evening installing my new 3 wire heated O2 sensor.

https://www.summitracing.com/int/parts/ ... /overview/

Image

Install was straight forward, no issues whatsoever. Actually is a very well put together kit. I'm pleased with it.

But the big question.....did it work?

For the first time since I've had this car, it went into closed loop and stayed there just idling in the garage, even with tonight's 1 deg C temps!!! :D Couldn't be more pleased with my purchase! So the lesson here is if you are going to do long tubes on your third gen, just get the heated o2 sensor right from the start and be done with it.


Mon Feb 20, 2017 9:48 pm
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Post Re: Back in a Formula Again
Given that the car is ready to go whenever the weather decides to co-operate I decided to give the heads I removed from the car a clean up so they spent some time in my electrolysis tank too.

Results were excellent again. Now I just need to decide what to do with them!

Image

Looking pretty good for 27 years old!


Thu Mar 02, 2017 10:20 pm
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