Forced Induction Superchargers | Turbochargers | Intercoolers

Twin 76 build.

Thread Tools
 
Search this Thread
 
Old Sep 27, 2008 | 03:43 PM
  #101  
Fbody4Ever's Avatar
On The Tree
iTrader: (15)
 
Joined: Sep 2002
Posts: 179
Likes: 0
Default

Originally Posted by sevanseriesta
That is good to hear, what did you do when this happened to you did you take your car somewhere?
No, I knew I had disconnected those grounds when I did a dash swap so it was the first thing I checked. I had put the grounds back on, and put the nuts on both the studs but had only spun them down by hand, and nowhere near tight. They still appeared to be all ready to go at a glance and I just got sidetracked and forgot to come back and tighten them up with a wrench. It happens.

I doubt it will take you long to get it sorted out. Just double check any grounds you touched and try another spot for that main ground, between the two I think theres a good chance you'll find your problem.
Reply
Old Sep 27, 2008 | 03:54 PM
  #102  
sevanseriesta's Avatar
Thread Starter
TECH Fanatic
iTrader: (34)
 
Joined: Sep 2003
Posts: 1,293
Likes: 1
From: Gardner, KS
Default

Originally Posted by Fbody4Ever
No, I knew I had disconnected those grounds when I did a dash swap so it was the first thing I checked. I had put the grounds back on, and put the nuts on both the studs but had only spun them down by hand, and nowhere near tight. They still appeared to be all ready to go at a glance and I just got sidetracked and forgot to come back and tighten them up with a wrench. It happens.

I doubt it will take you long to get it sorted out. Just double check any grounds you touched and try another spot for that main ground, between the two I think theres a good chance you'll find your problem.

I am trying to think if there are anyother grounds that I messed with. I am not sure if there are though I am almost positive everything is tightened down. but I am going to go back through everything tonight!
Reply
Old Sep 28, 2008 | 10:05 AM
  #103  
sevanseriesta's Avatar
Thread Starter
TECH Fanatic
iTrader: (34)
 
Joined: Sep 2003
Posts: 1,293
Likes: 1
From: Gardner, KS
Default

chevy bowtie, Thanks so much, that ground sure was the issue. Thank you very, very much. Good news is that I was able to turn the car over with no issues. Problem is it will not stay started. Not positive on the reason for that yet. It starts and the dies. Does not stay running for more then a couple seconds.

Fuel pressure is kind of low, but constant so I was not sure if that would have casued the problem or not. Another issue is that the gas in the car is about 1 year old. PCM is doing some weird things so I think that I might need some more grounds somewhere.

I will try to get some video of it not starting if I can.
Reply
Old Sep 28, 2008 | 10:44 AM
  #104  
Nimitz87's Avatar
12 Second Club
iTrader: (17)
 
Joined: Dec 2004
Posts: 1,449
Likes: 0
From: Cooper City, FL
Default

Originally Posted by sevanseriesta
chevy bowtie, Thanks so much, that ground sure was the issue. Thank you very, very much. Good news is that I was able to turn the car over with no issues. Problem is it will not stay started. Not positive on the reason for that yet. It starts and the dies. Does not stay running for more then a couple seconds.

Fuel pressure is kind of low, but constant so I was not sure if that would have casued the problem or not. Another issue is that the gas in the car is about 1 year old. PCM is doing some weird things so I think that I might need some more grounds somewhere.

I will try to get some video of it not starting if I can.
put fresh gas in it....no reason to start it up on that old nasty gas.

Chad
Reply
Old Sep 28, 2008 | 11:39 AM
  #105  
BOTTLEFEDLS1Z's Avatar
11 Second Club
iTrader: (32)
 
Joined: Oct 2003
Posts: 638
Likes: 0
From: STL
Default

Originally Posted by sevanseriesta
chevy bowtie, Thanks so much, that ground sure was the issue. Thank you very, very much. Good news is that I was able to turn the car over with no issues. Problem is it will not stay started. Not positive on the reason for that yet. It starts and the dies. Does not stay running for more then a couple seconds.

Fuel pressure is kind of low, but constant so I was not sure if that would have casued the problem or not. Another issue is that the gas in the car is about 1 year old. PCM is doing some weird things so I think that I might need some more grounds somewhere.

I will try to get some video of it not starting if I can.

Awesome build!!!

I had a issue with my car starting and then it would die after I converted the car to a return style fuel system. Couldn't figure out for the life of me what the problem was. Turned out to be my MAP sensor in the back of the intake. Proably not it, but might want to check it out...
Reply
Old Sep 28, 2008 | 12:06 PM
  #106  
trans2000am's Avatar
TECH Fanatic
iTrader: (49)
 
Joined: Feb 2006
Posts: 1,518
Likes: 0
From: detroit
Default

intake tighten down all the way i forgot and my car would start but die like 10 secs later
Reply
Old Sep 28, 2008 | 12:48 PM
  #107  
sevanseriesta's Avatar
Thread Starter
TECH Fanatic
iTrader: (34)
 
Joined: Sep 2003
Posts: 1,293
Likes: 1
From: Gardner, KS
Default

Originally Posted by BOTTLEFEDLS1Z
Awesome build!!!

I had a issue with my car starting and then it would die after I converted the car to a return style fuel system. Couldn't figure out for the life of me what the problem was. Turned out to be my MAP sensor in the back of the intake. Proably not it, but might want to check it out...

what was wrong with the MAP sensor?

I am going to go ahead and change out the gas also. Is Vats something I should be looking at also.
Reply
Old Sep 28, 2008 | 12:49 PM
  #108  
sevanseriesta's Avatar
Thread Starter
TECH Fanatic
iTrader: (34)
 
Joined: Sep 2003
Posts: 1,293
Likes: 1
From: Gardner, KS
Default

Originally Posted by trans2000am
intake tighten down all the way i forgot and my car would start but die like 10 secs later

Intake is tight, I am sure of that.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-1

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-2

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-3

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-4

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-5

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-6

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-7

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-8

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-9

10 Camaros You Should Never Buy

 
Old Sep 28, 2008 | 01:18 PM
  #109  
BOTTLEFEDLS1Z's Avatar
11 Second Club
iTrader: (32)
 
Joined: Oct 2003
Posts: 638
Likes: 0
From: STL
Default

Originally Posted by sevanseriesta
what was wrong with the MAP sensor?

I am going to go ahead and change out the gas also. Is Vats something I should be looking at also.

It had RTV inside of it from trying to get it so seal in the FAST..

VATS is something to look at as well. Not disabled yet??
Reply
Old Sep 28, 2008 | 02:00 PM
  #110  
veee8's Avatar
8 Second Club
iTrader: (40)
 
Joined: Aug 2005
Posts: 1,861
Likes: 0
From: Raleigh,North Carolina
Default

Security light would probably flash if the VATS was coming on. Did you put larger injectors in? Did you convert to speed density? What does your tune consist of?
Reply
Old Sep 28, 2008 | 05:30 PM
  #111  
sevanseriesta's Avatar
Thread Starter
TECH Fanatic
iTrader: (34)
 
Joined: Sep 2003
Posts: 1,293
Likes: 1
From: Gardner, KS
Default

I am not sure what the security light does, I have not looked at it. I will check that out. Right now I believe it is just the stock pcm with nothing done to it. The injectors are stock. I was trying to make sure nothing leaked and everything was all good before I put the big injectors in.
Reply
Old Sep 28, 2008 | 06:39 PM
  #112  
chevybowtie's Avatar
Launching!
15 Year Member
iTrader: (16)
 
Joined: Nov 2005
Posts: 229
Likes: 1
From: Eagle River, AK
Default

Not a problem.... I glad you got that issued fixed. As for your next one. Not to sure. It seems that your on the right track though. I will keep following your build.
Reply
Old Sep 28, 2008 | 06:42 PM
  #113  
chevybowtie's Avatar
Launching!
15 Year Member
iTrader: (16)
 
Joined: Nov 2005
Posts: 229
Likes: 1
From: Eagle River, AK
Default

Also you will find out later that you may need to get smaller turbine housings to spool those turbos up. I don't think that they are too big for this motor... I just think that the .96's are too big. Maybe .68's?
Reply
Old Sep 28, 2008 | 08:55 PM
  #114  
sevanseriesta's Avatar
Thread Starter
TECH Fanatic
iTrader: (34)
 
Joined: Sep 2003
Posts: 1,293
Likes: 1
From: Gardner, KS
Default

this motor will not stay in the car. This motor is only to get things ironed out with. I have spent less then 1000 on this motor. I would like it to make good power but my goal is to ultimately get the car to run well and then put something bigger in.
Reply
Old Sep 29, 2008 | 01:42 AM
  #115  
bluecamaroz28's Avatar
Banned
 
Joined: Jun 2005
Posts: 778
Likes: 0
Default

Originally Posted by sevanseriesta
this motor will not stay in the car. This motor is only to get things ironed out with. I have spent less then 1000 on this motor. I would like it to make good power but my goal is to ultimately get the car to run well and then put something bigger in.
Sounds a good plan. Once you have it running you will be able to know what to change.

It's either stepping up for bigger motor or switching to smaller turbo's. It will depend on power level and sool time that you want.

But be prepared for a late spool time with only 347ci and twin76.

Good luck.
Reply
Old Oct 7, 2008 | 11:36 PM
  #116  
sevanseriesta's Avatar
Thread Starter
TECH Fanatic
iTrader: (34)
 
Joined: Sep 2003
Posts: 1,293
Likes: 1
From: Gardner, KS
Default

Everything is done and the damn thing finally started and says running. I found that #7 plug was not tight, causing it to die after about 5 seconds. I can not touch the gas cause then it will die, but I think that has to do with the tune, so I think I am going to be sending the computer off this week.

Another thing that I noticed is that my fans did not come on at anytime during the 30 mins I kept it running. I am not running a thermostat, but hte car did get to about 190 and never went above that. Does any one know which wires are the hots and what are the grounds for each hot?
Reply
Old Oct 17, 2008 | 06:32 PM
  #117  
sevanseriesta's Avatar
Thread Starter
TECH Fanatic
iTrader: (34)
 
Joined: Sep 2003
Posts: 1,293
Likes: 1
From: Gardner, KS
Default

Thanks Speed INC, I received my pcm today and I am hoping to have some video of the car very shortly. Wont be anything exciting cause it is only a base tune. But I wanted to say thanks again...

That was superfast Turn around!!!!
Reply
Old Oct 18, 2008 | 08:30 AM
  #118  
HUNTER02SS's Avatar
9 Second Club
iTrader: (24)
 
Joined: Oct 2006
Posts: 2,796
Likes: 1
From: Kennesaw, Georgia
Default

I just switched to those same turbo's and I will tell you that your intercooler is to small once you start turning the boost up to the 20psi. and higher range. Your intake temps will be starting to climb up in the 200deg. range!!
Be carefull as well with those H-beam rod's! When I switched to the bigger turbo's my #1 rod decided it was time to check out at 23psi!
Reply
Old Oct 18, 2008 | 09:15 AM
  #119  
sevanseriesta's Avatar
Thread Starter
TECH Fanatic
iTrader: (34)
 
Joined: Sep 2003
Posts: 1,293
Likes: 1
From: Gardner, KS
Default

Thank you, Thank you, Thank you. What are you planning about doing with your intercooler. Any company that you are looking at using. How much power do you think that you made with the 76's
Reply
Old Oct 18, 2008 | 09:27 AM
  #120  
Mr.427's Avatar
TECH Apprentice
 
Joined: Aug 2006
Posts: 348
Likes: 0
From: Atlanta
Default

Sounds great! Enjoy the build and the drive carefully!
Reply



All times are GMT -5. The time now is 02:58 AM.

story-0
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-1
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-2
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-3
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-4
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-5
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-6
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-7
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-8
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-9
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE