The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-30-2018, 07:12 PM   #76
cruizin01
Registered User
 
Join Date: Mar 2016
Location: Cbus, Ohio
Posts: 290
Re: 77 c10 5.3ls turbo

Quote:
Originally Posted by jrpontiac View Post
Thats the fitting. I dont remember my steel line having two ridges. Glad you got it handled.
Thats the picture of the style of line these fittings were designed for. The stock sender just has a flare on the end.
__________________
'78 C10 Build
cruizin01 is offline   Reply With Quote
Old 01-05-2019, 12:32 AM   #77
C10Squared
Registered User
 
Join Date: Sep 2003
Location: W. Atlanta, GA
Posts: 179
Re: 77 c10 5.3ls turbo

Awesome build and beautiful truck! I’d love to do the same on my ls swapped 77.
C10Squared is offline   Reply With Quote
Old 01-05-2019, 03:14 AM   #78
Gregski
Senior Member
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 6,119
Re: 77 c10 5.3ls turbo

Impressive
Gregski is offline   Reply With Quote
Old 01-17-2019, 03:00 PM   #79
jrpontiac
Registered User
 
jrpontiac's Avatar
 
Join Date: Nov 2017
Location: spokane, wa
Posts: 120
Re: 77 c10 5.3ls turbo

Got the truck back from the tuner, pouring ran so I couldn't get on it. He tuned it while dry and said my turbo, tranny, torque converter, rear end all seemed setup real nice and well matched. I was happy to hear that.

Tuner gave me a list of things I need to do.

Turbo was blowing a smoke when he got on it. I had the oil input and exit ports close to horizontal, he clocked it close to vertical. He also told me that the fitting on the turbo oil exit line is a 90 and I should make it a straight fitting. If it still has blow by he can put a small restrictor in the input line to slow the flow of oil.

Waste gate was blowing at 3lbs which was fine for his tuning purposes but he told me to find a 10lb spring.

VSS wasn't signaling so it occasionally dies while stopped.

PCV system needs to be entirely reworked, I left the OEM. With boost it needs to be reworked.

He said with what I got going and my sticky Nittos I should be able to get into the 11's with a 10lb spring. Not sure about that but we'll see this summer.
__________________
1977 Chevy C10 SB, Turbo 5.3ls, TH400
jrpontiac is offline   Reply With Quote
Old 01-17-2019, 03:28 PM   #80
daddyjeep
Registered User
 
daddyjeep's Avatar
 
Join Date: Nov 2015
Location: Smethport, PA
Posts: 1,037
Re: 77 c10 5.3ls turbo

Did he give you HP and torque numbers?
__________________
85 K30 crew cab dually - Project http://67-72chevytrucks.com/vboard/s...d.php?t=694939
87 Wrangler Rock Crawler - Reason for the project http://www.wranglerforum.com/f330/da...ld-122601.html
04 1500 crew cab
http://67-72chevytrucks.com/vboard/s...d.php?t=786514
daddyjeep is offline   Reply With Quote
Old 01-17-2019, 03:34 PM   #81
jrpontiac
Registered User
 
jrpontiac's Avatar
 
Join Date: Nov 2017
Location: spokane, wa
Posts: 120
Re: 77 c10 5.3ls turbo

Did not dyno tune it, will do so after I get my to do list completed and put some miles on it. In the spring some time.
__________________
1977 Chevy C10 SB, Turbo 5.3ls, TH400
jrpontiac is offline   Reply With Quote
Old 01-20-2019, 11:49 PM   #82
LT7A
Registered User
 
Join Date: Oct 2015
Location: Seattle, WA
Posts: 951
Re: 77 c10 5.3ls turbo

Nice lowered stocker look with a killer drivetrain. Well executed. Give a shout if you're going to bring it over to the west side ever. It'd be cool to see it in person.
LT7A is offline   Reply With Quote
Old 02-13-2019, 11:49 PM   #83
jrpontiac
Registered User
 
jrpontiac's Avatar
 
Join Date: Nov 2017
Location: spokane, wa
Posts: 120
Re: 77 c10 5.3ls turbo

Got the pcv setup completed not sure it will work but Ill give it a go. Welded a 10an bung on both the pass. and drivers valve cover. Connected bung with some braided lines to the oil catch can mounted where the battery tray was. I googled what other folks are doing for pcv systems and most are much more complicated. Most have a clean line and dirty line, check valves. I dont have either of my lines dedicated to clean or dirty. Seems like my setup would self equalize. I guess ill find out.

Picked up a set of factory c10 caps for cheap. Not sure I like them but they do help with the sleeper look.
Attached Images
   
__________________
1977 Chevy C10 SB, Turbo 5.3ls, TH400
jrpontiac is offline   Reply With Quote
Old 02-17-2019, 07:21 PM   #84
Sparky dave
Registered User
 
Join Date: Nov 2017
Location: Leeds west yorkshire
Posts: 264
Re: 77 c10 5.3ls turbo

Thanks for the inspiration can’t wait to hear how it drives after the 10 lb spring
Sparky dave is offline   Reply With Quote
Old 02-17-2019, 10:08 PM   #85
z71se
Senior Member
 
Join Date: Nov 2015
Location: Cailfornia
Posts: 265
Re: 77 c10 5.3ls turbo

Actually just ignore the clean side/ dirty side stuff. I'd highly recommend getting some sort of PCV setup... not for emissions but you really need engine vacuum to "suck" out the oil mist! This is the exact routing I ran at 18psi making 725rwhp through a 2005 5.3:

__________________
77 C10 Silverado SWB - LS Swap, mechanical resto-mod
05 Z71 Silverado RCSB - 5.3L LM7, 76mm turbo, 4L80e
z71se is offline   Reply With Quote
Old 02-24-2019, 06:31 PM   #86
Ronzo
Registered User
 
Ronzo's Avatar
 
Join Date: Jul 2014
Location: Ft Whoopup, Ab
Posts: 302
Re: 77 c10 5.3ls turbo

Need to add some of those great pictures from Facebook buddy.
Ronzo is offline   Reply With Quote
Old 09-16-2019, 09:13 PM   #87
KMC3420
Registered User
 
KMC3420's Avatar
 
Join Date: Dec 2012
Location: Harrison, AR
Posts: 885
Re: 77 c10 5.3ls turbo

Hey JRPpntiac I am guessing you are past the shake down miles? How is this thing running and have you made any changes or upgrades at this point?
__________________
68 SWB C-10 original 350 A/C
KMC3420 is offline   Reply With Quote
Old 09-16-2019, 11:30 PM   #88
jrpontiac
Registered User
 
jrpontiac's Avatar
 
Join Date: Nov 2017
Location: spokane, wa
Posts: 120
Re: 77 c10 5.3ls turbo

Haven't made any changes and haven't put as many miles on it as expected. But it is running very well, a pleasure to drive and it rips. Drove maybe 250 miles. Picked up some other cars this spring that diverted my attention. One of them being an 90 SS 454 .

At 13lbs and tuner says I will need a speed density to go even a 1/2lb more. Haven't had it on the dyno. Hope to do so in the next month or 2. Tuner is really busy and Im not in a hurry. Only thing I still need to trouble shoot is the VSS, it isnt working so it sometimes dies idle..
__________________
1977 Chevy C10 SB, Turbo 5.3ls, TH400
jrpontiac is offline   Reply With Quote
Old 09-17-2019, 09:07 AM   #89
KMC3420
Registered User
 
KMC3420's Avatar
 
Join Date: Dec 2012
Location: Harrison, AR
Posts: 885
Re: 77 c10 5.3ls turbo

Quote:
Originally Posted by jrpontiac View Post
Haven't made any changes and haven't put as many miles on it as expected. But it is running very well, a pleasure to drive and it rips. Drove maybe 250 miles. Picked up some other cars this spring that diverted my attention. One of them being an 90 SS 454 .

At 13lbs and tuner says I will need a speed density to go even a 1/2lb more. Haven't had it on the dyno. Hope to do so in the next month or 2. Tuner is really busy and Im not in a hurry. Only thing I still need to trouble shoot is the VSS, it isnt working so it sometimes dies idle..
Awesome, happy to hear that. Donít rush it thatís for sure. I bet itís a blast to drive. At 13lbs thatís pushing some boost!
__________________
68 SWB C-10 original 350 A/C
KMC3420 is offline   Reply With Quote
Old 09-19-2019, 02:02 PM   #90
tintbox
Registered User
 
Join Date: Jan 2014
Location: Virginia
Posts: 76
Re: 77 c10 5.3ls turbo

Awesome build!
tintbox is offline   Reply With Quote
Old 10-17-2019, 08:12 PM   #91
jrpontiac
Registered User
 
jrpontiac's Avatar
 
Join Date: Nov 2017
Location: spokane, wa
Posts: 120
Re: 77 c10 5.3ls turbo (Dyno numbers)

Good news - Had the truck dynoíd. Running about 12.5 lbs
528hp/501tq

Bad news - it was making some lifter noise before the Dyno. I think one lifter has let go. Will pull the heads and inspect. If lower end looks good probably will upgrade heads/arp head bolts and a couple other things. If it is a piston problem Iíll scrap the 5.3 and build a 6.0 and shoot for 700 hp.
Attached Images
 
__________________
1977 Chevy C10 SB, Turbo 5.3ls, TH400
jrpontiac is offline   Reply With Quote
Old 10-17-2019, 08:31 PM   #92
KMC3420
Registered User
 
KMC3420's Avatar
 
Join Date: Dec 2012
Location: Harrison, AR
Posts: 885
Re: 77 c10 5.3ls turbo

Awesome! That’s impressive, and 12 lbs is plenty of boost. Do you have head studs now? There are a few rocker kits that would suite you well if you just have stock rockers now and no upgrades. Fingers crossed it’s just a rocker issue and you can save some cash!
__________________
68 SWB C-10 original 350 A/C
KMC3420 is offline   Reply With Quote
Old 10-17-2019, 08:55 PM   #93
jrpontiac
Registered User
 
jrpontiac's Avatar
 
Join Date: Nov 2017
Location: spokane, wa
Posts: 120
Quote:
Originally Posted by KMC3420 View Post
Awesome! Thatís impressive, and 12 lbs is plenty of boost. Do you have head studs now? There are a few rocker kits that would suite you well if you just have stock rockers now and no upgrades. Fingers crossed itís just a rocker issue and you can save some cash!
Unfortunately I checked the rockers at the dyno shop, they are fine. No studs and a stock rockers. Iíve only changed the cam/valve springs and injectors. Will tear into and game plan once I figure out the problem.
Posted via Mobile Device
jrpontiac is offline   Reply With Quote
Old 10-18-2019, 01:14 AM   #94
bigoilman
Registered User
 
Join Date: Oct 2014
Location: Ocean Springs, MS
Posts: 41
Re: 77 c10 5.3ls turbo (Dyno numbers)

Sooo....by my math that's about 660HP at the flywheel!
Pretty dang good, I'd say!

Quote:
Originally Posted by jrpontiac View Post
Good news - Had the truck dynoíd. Running about 12.5 lbs
528hp/501tq

Bad news - it was making some lifter noise before the Dyno. I think one lifter has let go. Will pull the heads and inspect. If lower end looks good probably will upgrade heads/arp head bolts and a couple other things. If it is a piston problem Iíll scrap the 5.3 and build a 6.0 and shoot for 700 hp.
bigoilman is offline   Reply With Quote
Old 10-18-2019, 01:02 PM   #95
daddyjeep
Registered User
 
daddyjeep's Avatar
 
Join Date: Nov 2015
Location: Smethport, PA
Posts: 1,037
Re: 77 c10 5.3ls turbo

Awesome numbers.
__________________
85 K30 crew cab dually - Project http://67-72chevytrucks.com/vboard/s...d.php?t=694939
87 Wrangler Rock Crawler - Reason for the project http://www.wranglerforum.com/f330/da...ld-122601.html
04 1500 crew cab
http://67-72chevytrucks.com/vboard/s...d.php?t=786514
daddyjeep is offline   Reply With Quote
Old 11-20-2019, 02:34 AM   #96
Ford Assassin
LS Guru
 
Ford Assassin's Avatar
 
Join Date: Jun 2008
Location: Jackson, Ca.
Posts: 597
Question Re: 77 c10 5.3ls turbo

Quote:
Originally Posted by jrpontiac View Post

First purchase was the exhaust manifold, I used the Hooker single turbo exhaust manifold. It is a very tight fit but it clears. I like it because it is cast and has a factory look to it and is not terribly expensive ($300). I had interference with the original clam shell mount, but after some grinding it cleared. I suspect if I had used aftermarket motor mounts it would have cleared.
Did you grind the manifold or the clam shell?

Which adapters did you use for the motor mounts?

Thanks!!
__________________
Cable

-K5 Blazer 2wd: 6.0 LQ4, 7875 Turbo, Tick Stage II Turbo Cam, Built 4L80e, Yank SS 3000, 9.5" 14 Bolt
-Chevy 3+3 Crew Cab Dually: 6.0 LQ4, GT45 Turbo, Summit Stage 1 Truck Cam, NV4500 5-Speed, Dana 70HD
Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=803608
Ford Assassin is offline   Reply With Quote
Old 11-20-2019, 12:35 PM   #97
jrpontiac
Registered User
 
jrpontiac's Avatar
 
Join Date: Nov 2017
Location: spokane, wa
Posts: 120
Re: 77 c10 5.3ls turbo

Ground the clam shell. Don't remember the brand of the mounts but they were the standard flat plate 1/4 steel type. If I was to do it again I would use a solid motor mount. #1 I'm looking for more horsepower and probably should switch over. #2 they have a smaller profile.
__________________
1977 Chevy C10 SB, Turbo 5.3ls, TH400
jrpontiac is offline   Reply With Quote
Old 02-22-2020, 05:42 PM   #98
jrpontiac
Registered User
 
jrpontiac's Avatar
 
Join Date: Nov 2017
Location: spokane, wa
Posts: 120
Re: 77 c10 5.3ls turbo

Iíve been busy and itís been cold so truck has been sitting for a few months. Got back into it today and turns out I had a broken spring land. Donít know enough about broken piston lands to make any comment on why it broke. Not sure if I am going to go cheap and find a used piston, or spend some $. I had been looking at Craigslist all winter hoping a cheap 6.0 would pop up to start a higher HP build. It never did.
Attached Images
 
__________________
1977 Chevy C10 SB, Turbo 5.3ls, TH400
jrpontiac is offline   Reply With Quote
Old 02-24-2020, 12:15 PM   #99
cruizin01
Registered User
 
Join Date: Mar 2016
Location: Cbus, Ohio
Posts: 290
Re: 77 c10 5.3ls turbo

I would find a used piston and then increase your ring gap. Thats what cause the broken ringland.
__________________
'78 C10 Build
cruizin01 is offline   Reply With Quote
Old 02-24-2020, 02:07 PM   #100
Loco83
Registered User
 
Loco83's Avatar
 
Join Date: Nov 2018
Location: Cali
Posts: 88
Re: 77 c10 5.3ls turbo

Quote:
Originally Posted by Gregski View Post
Impressive
Very Impressive
Loco83 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:28 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com