58 Chevy Build

Any questions or suggestions regarding restorations
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KSF
Posts: 325
Joined: Fri 07 Feb 2014, 15:07
Location: Western Cape

Re: 58 Chevy Build

Post by KSF » Thu 27 Jul 2017, 10:17

Is the Chevy running now? I saw one like it late Saturday afternoon (22nd July) on the N1 near Durbanville/Bellville area. Looked fantastic! :D

If it was not you, then there is one very similar to yours running around there.

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Chev58
Posts: 133
Joined: Tue 05 May 2015, 01:25
Location: Durbanville

Re: 58 Chevy Build

Post by Chev58 » Thu 27 Jul 2017, 11:13

Hey there KSF, yes I admit ;) that was me, been busy and have not had much time to update on my progress (been spending the last month studying efi tuning till early hrs) that was probably one of my logging runs to collect data.
58 Chevy Apache

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KSF
Posts: 325
Joined: Fri 07 Feb 2014, 15:07
Location: Western Cape

Re: 58 Chevy Build

Post by KSF » Thu 27 Jul 2017, 15:01

Well that is a huge milestone reached, congrats! And very well done, I only saw the truck a couple of lanes over in passing, but it looked really good. Needless to say it stands out in the sea of modern Iphones.... :D

Look forward to reading the rest of its story.

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Chev58
Posts: 133
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Location: Durbanville

Re: 58 Chevy Build

Post by Chev58 » Mon 31 Jul 2017, 00:39

Hi Folks, since my last update in the beginning of June much has happened even though progress feels slow looking the foto's.
Seats were still at upholsters, center console still to be finished.
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View from the back(even though it will never be seen, it should still look tidy?)
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Seats fitted.
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Now to finish the polishing of front fenders, bonnet etc and get it fitted.
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Now its starting to look like a functional vehicle :P
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Grill assembly and head lights fitted.
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This was sunday 18June, also a huge day/evening as it was also the first time that it was driven :D I was in awe, everything actually worked better than expected, except wheel alignment was off(hand/eye alignment is still off a tad :roll: )
So monday morning I planned to take her for wheel alignment and then off to weight bridge and then roadworthy, seeing that I had already started with my registration process and I was now holding up the progress with the paper trail, so guess what happens monday morning?
Yup that's right, all ready to go and SHE DOES NOT START...... :evil: nada/nothing /niks starter motor spins but bendix does not engage the flywheel(lots of choice afrikaans was used for about an hour)
1 out of every 10-15 start attempts the starter would engage and fire her up(for 6+ months never a problem - Murphy - bastid guy).
I managed wheel alignment and weight bridge .... eventually and then finally after 2pm got her to roadworthy and she behaved and passed with flying colours( even though I though the hand brake system was not working the way effectively(in my opinion) but it stopped the test equipment just fine.
What a relief to have the vehicle licensed and legal.
Next up will be the issues with efi tuning etc
58 Chevy Apache

BulkCarrier
Posts: 8
Joined: Mon 27 Feb 2017, 09:18

Re: 58 Chevy Build

Post by BulkCarrier » Mon 31 Jul 2017, 12:47

Is that the original seats or what vehicles seats did you use?

Sent from my Nexus 6P using Tapatalk


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Chev58
Posts: 133
Joined: Tue 05 May 2015, 01:25
Location: Durbanville

Re: 58 Chevy Build

Post by Chev58 » Mon 31 Jul 2017, 15:56

I re-used the original seat frame, transplanted some jag back rest frame and then used bmw back rest support shell with its foam inner.
The seat base was build up of various layers of different foam materials and some sculpting to get the shape desired, very comfortable too I must admit.
The console etc was all custom made to fit/work.
58 Chevy Apache

WCC
Posts: 115
Joined: Mon 23 Jan 2017, 20:45

Re: 58 Chevy Build

Post by WCC » Mon 31 Jul 2017, 21:26

Congrats! Can't wait to see her on the road...and when I my baby is back we can take them out for a road trip! :D

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IndianaJones
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Joined: Sun 23 Aug 2009, 17:39
Location: Citrusdal, RSA

Re: 58 Chevy Build

Post by IndianaJones » Tue 01 Aug 2017, 18:23

Good on you, the truck is coming together splendidly.
Seems your planning paid off and the stance is dead on, the colour looks great.
Liking your centre console a lot, the metal work on it is even so nice, you could almost have left it without upholstery.

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Chev58
Posts: 133
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Location: Durbanville

Re: 58 Chevy Build

Post by Chev58 » Tue 01 Aug 2017, 23:00

Thank you, the stance was an important part of this build's planning and it took many measurements and mock ups and I was pleased with the results at final assembly.
Leaving the center console in steel and painted was very much an option after I finished it, but the leather will avoid paint chips & scratches in the long run.
58 Chevy Apache

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Chev58
Posts: 133
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Location: Durbanville

Re: 58 Chevy Build

Post by Chev58 » Wed 02 Aug 2017, 00:13

Ok lets get on with the story;
After having the starter motor giving me uphill on starts, I pulled it off and found that the solenoid was the culprit as it would spin the motor but not engage the bendix, a few calls later and I found a replacement at Auto Magneto in Ndabeni, refitted the starter and she's all good again.
So the next big issue is tuning the big gussler to actually give me some value for the amounts of fuel its burning :twisted:
A cold startup would require throttle input to start and keep it on the throttle for a few seconds before a stable idle would hold, once in gear and warmed up it would not hold idle at all, requiring both feet to drive it.

Having replaced the original 1996 Black box PCM ( which was not the most tune able ecu from that era) I fitted a newer 0411 GM pcm from an early 2002 Chevy(this is a mod that is/was most popular in the USA)
So after plumbing in the original wiring into the newer 0411 pcm(it has completely different connector plugs and locations from the "Black" box pcm)and this pcm was flashed with a 5.7L Express van base map( suitable to basic run the 7.4 vortec motor & 4L80E box)

Late last year I approached a good few CT based performance shops for some help in getting this motor/gearbox running/tuned correctly, I was basically told that I would have to add on /replace what I have with Splifftronics/Dicktaker sytems and they did not have maps for my motor :x

So I bit the bullet once again and broke off another piece off my credit card and ordered HP Tuners VCM Suite and figure this EFI stuff out and help myself.

After spending too many long hours/nights reading and watching tutorials online I was starting to see how an efi ecu thinks and what it is trying to ahieve with the sensor inputs it recieves/reads.
So I hooked up my HP Tuners OBDII interface and setup some scanning parameters and set off logging some info as a start and found that the fueling and AFR values are all over the place(to rich and to lean etc)
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After realizing that this is going to take some time(at least with me trying to learn how to fix and not destroy the motor at the same time).
So I need an accurate AFR guage plumbed into the exhaust system in order to read/record what is coming out the exhaust.
Next investment was an Innovate Motorsports MTX-L guage & wideband O2 sensor:
To fit this the exhaust needed the sensor mounted onto the system, so off came the exhaust system.
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Fortunately we designed this system to be fully removable, then weld in the O2 sensor threaded bung and refit the system - easy.
The "work" bit of this AFR install was to come :( the seats and center console had to come out) I wanted to install the AFR guage semi permanent) so some more wiring was required and adding an analog input to the pcm so that I can record AFR values for tuning adjustments direct to the pcm.
The Afr 0-5v output signal was connected to the pcm EGR input signal(I have removed this system off the motor), in HP Tuners software I can now read EGR position voltage and transform via some calculations in Hp Tuners and read actual AFR values and % error( this was the best part of 1 weekend to strip, install and re-fit everything).
Learning new stuff is so much fun sometimes, even for an old fart like me :D
58 Chevy Apache

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