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Old 12-14-2018, 10:51 PM   #1
tmills213
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Re: 1964 C20 Turbo LQ4 Build

Formerly mi lol. Back to ****ty Il.
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Old 03-25-2019, 11:20 PM   #2
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Re: 1964 C20 Turbo LQ4 Build

Did something. hydroboost mounted. Drew up and cut the brackets 3/16 and 3/8 for nut clearance. Tack welded a little booger so it doesnt rotate. I am unsure if I would do it again, just buy it probably. should work fine if anyone wants to try it.

I also made a square nut to remove the hyd nut.
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Old 07-05-2020, 10:33 PM   #3
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Re: 1964 C20 Turbo LQ4 Build

Not sure where almost a year went since I posted, oh wait, kids haha. I finally had enough again (again) and moved the truck to the lift so it motivated me to work on it.

-Fuel system
- -6 return -8 feed PTFE braid to Nicopp hard in between. going E85
- diesel truck fuel iflter 6 micron at the tank (fed be walb 450)
- jeep 16 gallon tank with custom sending unit/ AN bulkheads (super simple piece)
- made the bracket to mount it in the rear. did have to cut rivets on one crossbar. Will decide if it goes back in later.
-need to figure out filler neck/breather still

Trans
- cooler is 11" remote syst from am. volt. its a cheap one and ill see how it does. under passenger bed for ease. THis will be regular rubber trans hose and barb fitting. my AN fitting costs are getting ridiculous and dont think i needed here.

I'm sure there is something else in between...

miscellaneous :
-steering linkage mounted
-cruise control mounted
-turbski drain plumbed and fitting welded in pan.
-coils are mounted (in a weird spot but we will see)
-Ditched the stock harness and sold my soul for a holley Xmax.
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Old 07-05-2020, 10:39 PM   #4
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Re: 1964 C20 Turbo LQ4 Build

more pictures
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Old 07-19-2020, 10:28 PM   #5
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Re: 1964 C20 Turbo LQ4 Build

few things started
battery box, not sure about this one yet. targets a d38/78 battery dimensions, I had a batt close around and it was tight. like bolt head rubbing tight. I cut the corner of box down into the fender to give me some feel good spaced between the hood and the posts.

fuse panel- started using original mounting screws. the terminator will be in the glove box. all power has a short run through drivers. i will have to redo the body harness.
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Old 11-01-2022, 12:46 PM   #6
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Re: 1964 C20 Turbo LQ4 Build

Oh damn!!
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Old 11-04-2022, 08:31 AM   #7
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Re: 1964 C20 Turbo LQ4 Build

The broken ring lands are just a right of passage.....

$150 on eBay for a set of 8 rods and pistons, file the rings and your are good to go!

(he says safely from the comfort of his desk.....)

P.
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Old 11-20-2022, 12:04 AM   #8
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Re: 1964 C20 Turbo LQ4 Build

Sorry sometimes I get emails sometimes I don't about responses.

I couldn't justify the full forged route being the low target. I got 8 Gen4 rods and 8 Gen4 rods/pistons for $150. One piston was bad so I ended up buying another single off ebay. Mahle rings, and Clevite H bearins are waiting to go in after a dingle berry hone on 240 grit. This is favoring the Sloppy mech side of things. I was trying not to but I feel it'll get me down the road.

Other items like injectors (will prob get sent out or cleaned) and FPR to bring it back down.
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Old 11-20-2022, 12:43 PM   #9
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Re: 1964 C20 Turbo LQ4 Build

Do you know what caused the broken lands? Timing?
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Old 11-20-2022, 06:48 PM   #10
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Originally Posted by SkinnyG View Post
Do you know what caused the broken lands? Timing?
Not completely sure. Cyl 8 was cold and tough time idling. I think it was trying to compensate for a bad injector and making other cylinder rich. It hit 7 psi and afr in log peaked to 16 for a split second. My fuel pressure was running at 65 as it was overpowering the regulator. Lot of red flags but live and learn. Try again.
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Old 11-20-2022, 11:53 PM   #11
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Re: 1964 C20 Turbo LQ4 Build

A lean spike should melt a piston. Detonation breaks things. At 7 psi you should have no more than 15-20° on pump. That lean spike is also at 43kPa, so you're not actually in boost at all, so it shouldn't be hurt at that point in the datalog.
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1977 Silverado: Shortboxed & dropped, potato-potato
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Lotus Super 7 Replica: Scratch-built street-legal rollerskate
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Old 11-21-2022, 01:04 AM   #12
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Originally Posted by SkinnyG View Post
A lean spike should melt a piston. Detonation breaks things. At 7 psi you should have no more than 15-20° on pump. That lean spike is also at 43kPa, so you're not actually in boost at all, so it shouldn't be hurt at that point in the datalog.
Is bad luck an acceptable answer? It was on lowest spring waste. I honestly don’t know what to think. Is too much fuel due to high base cause wash down of cylinder and loose oil cooling on rings? There was a ton of fuel in oil. Cylinder walls look good.
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Old 11-21-2022, 11:45 AM   #13
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Re: 1964 C20 Turbo LQ4 Build

Bad luck is acceptable.

"If it weren't for bad luck, I'd have no luck at all."
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1977 Silverado: Shortboxed & dropped, potato-potato
V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag
Lotus Super 7 Replica: Scratch-built street-legal rollerskate
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Old 11-21-2022, 10:21 PM   #14
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Re: 1964 C20 Turbo LQ4 Build

tmils123 what kind of air bags are those and where did you get them? also how dose it ride with those?
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Old 11-22-2022, 04:58 PM   #15
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tmils123 what kind of air bags are those and where did you get them? also how dose it ride with those?
Skinny g is right. I haven’t had on road long enough to not focus on if it going to blow up lol. They seem to be a little on the small side. I think mine are an older version and only rate to like 130 psi or something. I want to say last time I looked at them they are much higher rated now closer to 200. They struggle to lift the front and need every bit of 100+ to maintain but I also think I have an an arm rubbing as there are no shims or alignment is way off.

I have D2600 bags on the rear and my last short drive they all seem bouncy as hell with new shocks. Maybe shock geometry it off but I am not much lower than stock.

Ultimately I think I will pocket the LCA in front .
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Old 11-22-2022, 12:15 AM   #16
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Re: 1964 C20 Turbo LQ4 Build

They look like Universal Air "Air House 2" bags. I'm running them, but mine hasn't been on the street yet.
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1977 Silverado: Shortboxed & dropped, potato-potato
V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag
Lotus Super 7 Replica: Scratch-built street-legal rollerskate
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Old 11-22-2022, 08:55 PM   #17
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Re: 1964 C20 Turbo LQ4 Build

I need 125psi in those bags to life my '61 to ride height. Ride height is with the bag about 5.5" tall or so.

Being a small bag, it'll need higher pressure and be kinda firm, but bouncing on the front bumper it doesn't seem too firm, but I set my vehicles up QUITE firm.
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1977 Silverado: Shortboxed & dropped, potato-potato
V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag
Lotus Super 7 Replica: Scratch-built street-legal rollerskate
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Old 12-05-2023, 12:21 AM   #18
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Re: 1964 C20 Turbo LQ4 Build

Short video of it idling. Been a fun summer. Needs new tires . I am over the catch can smell and exhaust fender dump but I’d rather enjoy for a minute. And get my 49 rolling. https://youtu.be/pCjRBacFe3Q?feature=shared
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Old 12-05-2023, 10:21 AM   #19
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Re: 1964 C20 Turbo LQ4 Build

It sounds healthy! Just refreshed with your thread and got caught up!
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