1986 Turbo K5
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I've had a few request to start a build thread on my K5 I recently built. So here it goes. I acquired the K5 from a family member about 2 years ago, so it's been a slow build. It was originally suppose to be a run about ride for the wife to carry our two dogs. Well that quickly snowballed after I decided to add a turbo to the mix. I tried to make a quick rundown of the parts below. Feel free to ask anything. Thanks for looking!
1986 K5 Engine Stock 5.3 crank and rods. Pistons came from a 4.8, as you can see they are now flattop instead of dished. Clevite crankshaft and rod bearings. Durabond cam bearings ARP rod bolts and Brian Tooley head studs. Z06 camshaft LS9 headgaskets LS7 lifters TSP hardened pushrods Brian Tooley dual valvesprings New TSP oil pump LS6 timing chain 340 Aeromotive Stealth Fuel pump intank ½ fuel lines 60lb Siemens injectors Mallory fuel regulator Mighty Mouse catch can GT45 Turbo JGS BOV and wastegate A/A intercooler 3 s/s intake piping 4 downpipe w/ Dynomax bullet Speed density tuned New radiator w/ electric fans Transmission 4L80E Rebuilt by Jakes Performance transmission 2800 stall B&M deep pan B&M transmission cooler with aux. fan Fresh rebuild on NP208 transfer case Axles 14B semi-floating axle in rear o 3.73 gears o Gov-lock o Dutchman custom 6 lug axles o Lugnut 4x4 custom disc brakes o Blue Torch Fabrication diff cover Stock 10 bolt up front for now Wheels/Tires/Suspension 15 Rally wheels 33x12.50 Firestone destination A/T 2 lift w/ Bilstein shocks Interior 2012 Mustang GT seats Helicopter seat belts front and rear Custom roll cage Rubber form fitted floors Dakota digital VHX instrument cluster Exterior Softopper soft top money well spent Truck tailgate N-Fab steps Exterior is mostly stock, few rock chips here and there The first few pics are the day I bought it, and starting of the tear down. |
Re: 1986 Turbo K5
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Engine build pics
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Re: 1986 Turbo K5
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Hotside fab. New engine mounts, gotta love the big engine bays.
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Re: 1986 Turbo K5
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She's in! It fit really nice. I forgot to mention earlier, I used Dirty Dingo engine mounts. The intercooler shot has got to be one of my favorites. The coldside piping is also starting to come together.
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Re: 1986 Turbo K5
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DEI carbon fiber header wrap to help cool things down a bit in the engine bay. Also the fabrication of the anaconda size down pipe. The inner fenderwell wasn't installed in the pic, but is later modified to completely hide the downpipe.
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Re: 1986 Turbo K5
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Downpipe wrapped and installed. The blow-off valve and wastegate sensing lines are ran in s/s tubing. The header wrap isn't that shiny, must have been the flash. Cold-side piping painted in wrinkle black paint. If you notice there is a MAF currently installed. This is taken out later on in the build to just use speed density.
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Re: 1986 Turbo K5
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Gotta love the Rally wheels. Grille fitment came out good. We only had to take it off about 34 times. :waah:. Fresh rebuild of the NP208 transfer case. We had to install a 32 spline input shaft to be able to slide it onto the 4L80E, so we did a complete rebuild and cleaned it up. New front spoiler also.
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Re: 1986 Turbo K5
Damn that is cool!!!
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Re: 1986 Turbo K5
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Turbo peeking through the grill. It now has a filter on it. 2012 Mustang seat fitment. My old man and my wiring bud helping out with getting it cranked. Last two are of it's first time pulling out under it's own power.
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Re: 1986 Turbo K5
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Maiden voyage to a buddies house with the top off of course. Shortly thereafter the roll cage started to be fabbed.
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Re: 1986 Turbo K5
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Cleaned up the dash with new trim and some LSX flare. Dakota digital gauges w/ A/F ratio and boost digital readout. Also installed new door panels. Soft top finally installed.
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Re: 1986 Turbo K5
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Top rolled up. It was perfect for Crusin' the Coast. Plenty of breeze, but still open to hear all of the cars. For some reason I don't have a pic of the truck tailgate on it. We put a truck tailgate, and installed the blazer trim so it looks like we shaved the grab handle. I'll have to get a pic of it later.
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Re: 1986 Turbo K5
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Pop's 53 and my K5 at Crusin' the Coast. Dakota gauges all lit up, the check engine goes away after it starts. Helicopter seat belts. Truck tailgate with blazer trim. Rear seat cover.
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Re: 1986 Turbo K5
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After Crusin' I decided to install the 14 bolt I had laying around. It's a 1996 14 bolt semi-floating. It has 3.73 gears with gov-lock. Lugnut 4x4 supplied the brake conversion. That is a Blue Torch Fabrication diff cover also.
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Re: 1986 Turbo K5
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Converted the truck to speed density tune, so we had to modify the intake pipe to do away with the MAF. It cleans up the engine bay a bit. Also scored a carbon fiber engine cover. Cleaned up the under carriage a bit.
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Re: 1986 Turbo K5
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Gotta represent the Tigers. Took it to work early a few times. Installed N-Fab steps for the wife. (Also helps hide the downpipe) If you have any questions about anything, just PM me. I don't get on here daily, so please be patient. Thanks for checking out my ride! :chevy:
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Re: 1986 Turbo K5
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Re: 1986 Turbo K5
I remember your truck, I think you posted a pic of it once is a Softtopper thread. Beautiful truck and work, thanks for posting details.
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Yep I posted awhile back about the top.
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Re: 1986 Turbo K5
Excellent build, thanks for sharing! On last photo, notice a lot of slip yoke exposed. Do you have enough spline engagement for your driveshaft into the t-case?
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Yeah believe it or not it actually has a lot more inside the seal. It was a special yoke I ordered for it. I was going to get a cv joint driveshaft but I never had a vibration problem, so I just got the extra long yoke.
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Re: 1986 Turbo K5
Wow! Nice K5. :metal:
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Re: 1986 Turbo K5
Thanks, it's been a pretty fun build.
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Well done on your build! :metal: |
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Re: 1986 Turbo K5
What did you do for a MPH signal? Was surprised to see you use a 208 since they never came with a VSS sensor. I've got a 241 but it's cable, I'd probably go to a VSS tail cone.
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Re: 1986 Turbo K5
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I have Dakota Digital VHX gauges on my truck. If you take a look at the pics below, on the NP208 I circled where the original speedocable went. Well Dakota makes a sensor, part # "SEN-01-128 128k GM-style High Frequency Pulse Generator", that will screw right on. Once you plug this on, you just program the gauges. For the ECU, 4x4 4L80Es have a ISS and a VSS. They are both before the adapter for the transfer case. See the random pic I found on-line. I converted my 4l60E to accept the 4L80E jumper harness. It really was pretty easy. Hope this helps, sorry for it being dirty, this was for mockup.
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Re: 1986 Turbo K5
Sweet build dude! I'm gathering parts to put a junkyard h/c/i 5.3 and 4l80e in to my 89 K5. How did you wind up mounting the 4l80e in yours? Most pickup guys just slide the stock trans crossmember back a little and redrill the holes but I haven't found any K5 guys that have used the bigger trans...
On a side note your trans sounds like it was modified at some point. Only the 2wd 4l80e's had both speed sensors in the case and the 4wd versions still had the output sensor in the transfer case (so the computer knows if you are in 4 low) and a plug where the OSS would have been in the case. GM still left the second tone ring in a lot of them so some guys are able to just remove the plug and screw in the sensor or have it added when doing a rebuild. I wasn't that lucky with my trans (from a 00 Silverado ) and didn't want to do a rebuild yet so I picked up a 32 spline np241c with VSS from a 90 Suburban. |
Thanks! I just slid my crossmember back as well. I built some reinforcement plates to go on the inside of the frame.
As far as my transmission goes. It was rebuilt by Jakes transmissions and I'm guessing I got lucky. I pulled the plug out and the Oss tone ring was already there. Just plugged in the harness with the new sensor. Posted via Mobile Device |
Re: 1986 Turbo K5
That's a pretty bad ass K5 nice work it turned out really good. Great write up as well very detailed and lots of pics just what I like to see. Keep up the good work and enjoy cruising the beasty Blazer :D
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Thanks! It catches a few people off guard. I'd like to build something a little lower to the ground next, maybe a first or second gen c10.
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Re: 1986 Turbo K5
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Added some S/S jewelry to the front diff cover to match the back.
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