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Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #785138 November 14th 2021 2:23 am
Joined: Jul 2019
Posts: 11,241
Likes: 411
S
Post Junkie
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Post Junkie
S
Joined: Jul 2019
Posts: 11,241
Likes: 411
Sounds nice,

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Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #785140 November 14th 2021 8:37 am
Joined: Jan 2014
Posts: 2,290
Likes: 137
veteran
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veteran
Joined: Jan 2014
Posts: 2,290
Likes: 137
Heck yeah, clean sweep.


[Linked Image from live.staticflickr.com]
Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #785143 November 14th 2021 10:00 am
Joined: Feb 2002
Posts: 32,696
Likes: 172
Old Timer
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Old Timer
Joined: Feb 2002
Posts: 32,696
Likes: 172
Awesome!


Jim & Lucy Newkirk
1965 Chevy Bad Influence
1981 Chevy-the Love Shack
2012 Chevy Van , 2020 chevy van
2020 Chevy van Sapphire Sweet.
Club Vannerz.
vanninvanner@comcast.net
Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #785179 November 15th 2021 12:36 pm
Joined: Nov 2013
Posts: 3,692
Likes: 32
pooh-bah
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pooh-bah
Joined: Nov 2013
Posts: 3,692
Likes: 32
Sounds very healthy!

Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #785424 November 19th 2021 9:03 pm
Joined: Apr 2007
Posts: 249
Likes: 59
1
G Van Man
OP Offline
G Van Man
1
Joined: Apr 2007
Posts: 249
Likes: 59
Pulling crazy airflow in through the MAF. ~425 gms/sec at 5,600-5,700 rpm and still over 410 at 6,200. About 500-510 hp worth of air and fuel getting to it. Safe to say it is going to be healthy once I finally get it back on the road.

Last edited by 1983G20Van; November 19th 2021 9:05 pm.

1983 G20 Conversion Van, 350 TPI, Reed Hydraulic Roller cam, Ported 906 Vortec, Edelbrock 3817 TPI-Vortec Base, Doug Thorley Tri-Ys, Dual 2 1/2" exhaust, Speed Density 7730 ECM tuned by ME, 700r4 by ME, Stock 1,600 rpm converter, Rebuilt Stock 10 bolt with posi by ME, 3.08 gears, 358 RWHP @ 5,200, 384 RWTQ @ 3,400, 14.66 @ 95.43 w 2.28s 60'
LS swap into 1986 G20 Van
#786736 December 28th 2021 5:38 pm
Joined: Dec 2021
Posts: 18
Likes: 6
1
stranger
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stranger
1
Joined: Dec 2021
Posts: 18
Likes: 6
Purchased new by my late folks. First several years spent on west coast in Washington. Was given to me when folks felt it was getting less dependable. Wife and I camped around Alaska for a several years until engine was so weak it was scary to take very far. I could not stand the idea of junking it, and when looking at new ones I got scared off by the multiple big screen TVs and such (we don't camp to watch TV). Decided to buy a running LS engine from junkyard and fix it up. I figured if I found expected rust I would stop and throw the engine in a pick-up or something. To my surprise, I only found rust under the original battery location, so pushed on with the swap. I am not gifted at mechanics, but I am good at cleaning stuff, which seems like 90% of the task. Wasn't even sure it was a possible swap but kept chasing issues down until I convinced myself it was possible. The original 305 engine was a dog when it was new and was about 145 HP and mileage was very poor. The LS engine more than doubles the power(300+HP) and will hopefully be a big improvement in mileage. I felt the high torque of the LS truck engine coupled with the .7 overdrive ratio would give us a decent highway cruiser.[Linked Image]

Attached Files
old firewall.jpg (323.59 KB, 133 downloads)
Ugly undercoating everywhere
old battery location.jpg (294.61 KB, 133 downloads)
Original battery location
PCM TAC mount.jpg (263.35 KB, 129 downloads)
New PCM mounts in old battery location
old AC location.jpg (256.5 KB, 128 downloads)
Old AC location
Holes for new gauges.jpg (278.1 KB, 129 downloads)
Holes for new gauges
New trans and tach install.jpg (269.29 KB, 129 downloads)
New tach and trans temp gauges
Old tire carrier.jpg (316.97 KB, 129 downloads)
Old tire carrier
Old ladder.jpg (373.23 KB, 132 downloads)
old ladder
Before strip repaint.jpg (366.02 KB, 134 downloads)
Before accent stripe repaint
After stripe repaint.jpg (333.33 KB, 127 downloads)
After stripe repaint

1986 G20 'GetAway' conversion van, family purchased new
2005 LS 5.3 from Avalanche donor
4L60E Overdrive Transmission
Donor Fuel Module (PWM retained) in new 33 gal tank
'MeterMatch' module converts new fuel module to old gas gauge
'CableX' cable transmission adapter to old speedometer



1 member likes this: frscke1
Re: LS swap into 1986 G20 Van
1986LSVAN #786745 December 28th 2021 8:36 pm
Joined: Aug 2002
Posts: 18,536
Likes: 135
Supreme Master
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Supreme Master
Joined: Aug 2002
Posts: 18,536
Likes: 135
Awesome man. I hope the swap goes smoothly.


[Linked Image from i.imgur.com]

Arianrhod:2003 Chevy Astro
Black Magic: 1985 Dodge B-250
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The Outcast:1983 Ford club wagon
Luna 1974 VW bay window transporter
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Re: LS swap into 1986 G20 Van
1986LSVAN #786748 December 28th 2021 8:51 pm
Joined: Feb 2002
Posts: 32,696
Likes: 172
Old Timer
Offline
Old Timer
Joined: Feb 2002
Posts: 32,696
Likes: 172
Good luck with the swap!


Jim & Lucy Newkirk
1965 Chevy Bad Influence
1981 Chevy-the Love Shack
2012 Chevy Van , 2020 chevy van
2020 Chevy van Sapphire Sweet.
Club Vannerz.
vanninvanner@comcast.net
Re: LS swap into 1986 G20 Van
1986LSVAN #786752 December 28th 2021 9:14 pm
Joined: Dec 2021
Posts: 18
Likes: 6
1
stranger
Offline
stranger
1
Joined: Dec 2021
Posts: 18
Likes: 6
I have been accused of 'polishing a turd' on this project.....you rarely see camper vans at car shows. A few more pics.

Attached Files
16.jpg (331.59 KB, 158 downloads)
Dirty Donor engine
18.jpg (306.03 KB, 161 downloads)
cleaned LS
19.jpg (306.81 KB, 153 downloads)
LS inserted
doghouse wiring.jpg (334 KB, 151 downloads)
from the doghouse
New heater only.jpg (246.23 KB, 152 downloads)
AC out heater only in
PCM TAC Bracket.jpg (242.93 KB, 154 downloads)
PCM TAC bracket
dirty engine bay.jpg (275.6 KB, 157 downloads)
dirty engine bay
cleaned engine bay.jpg (265.59 KB, 157 downloads)
clean painted engine bay
new radiator.jpg (309.58 KB, 150 downloads)
new Mishimoto radiator

1986 G20 'GetAway' conversion van, family purchased new
2005 LS 5.3 from Avalanche donor
4L60E Overdrive Transmission
Donor Fuel Module (PWM retained) in new 33 gal tank
'MeterMatch' module converts new fuel module to old gas gauge
'CableX' cable transmission adapter to old speedometer



1 member likes this: frscke1
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