C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Changed 60 to 80 injector.

Thread Tools
 
Search this Thread
 
Old 03-19-2011, 05:27 PM
  #1  
helga203
Safety Car
Thread Starter
 
helga203's Avatar
 
Member Since: Jul 2010
Location: chicago IL
Posts: 4,935
Received 434 Likes on 373 Posts

Default Changed 60 to 80 injector.

Changed my friends injectors from 60 to 80 same brand(siemems).His car run fine before now with new injectors when he gets on it and it starts hitting 4k to 5k seems like the injectors turn off is that possible. He has A&A 1000hp fuel system. Car ran fine with 60 in it,But not with the 80's only at wot is when they seem to shut off. Give it a few secs then the car will run normal again,at regular driving, but not at wot. Any thoughts.
Old 03-19-2011, 05:39 PM
  #2  
lucky131969
Tech Contributor
 
lucky131969's Avatar
 
Member Since: Jan 2007
Location: Dyer, IN
Posts: 15,264
Received 71 Likes on 67 Posts

Default

Originally Posted by helga203
Changed my friends injectors from 60 to 80 same brand(siemems).His car run fine before now with new injectors when he gets on it and it starts hitting 4k to 5k seems like the injectors turn off is that possible. He has A&A 1000hp fuel system. Car ran fine with 60 in it,But not with the 80's only at wot is when they seem to shut off. Give it a few secs then the car will run normal again,at regular driving, but not at wot. Any thoughts.
I'm confused. If the engine ran fine with 60 # injectors, and they were not approaching max duty cycle, why were they changed?
Old 03-19-2011, 05:43 PM
  #3  
helga203
Safety Car
Thread Starter
 
helga203's Avatar
 
Member Since: Jul 2010
Location: chicago IL
Posts: 4,935
Received 434 Likes on 373 Posts

Default

Originally Posted by lucky131969
I'm confused. If the engine ran fine with 60 # injectors, and they were not approaching max duty cycle, why were they changed?
He changed his boost level by changing his pulley set up. He was around 7 now he'll be around 16 to 18 with close to 750 to 800.
Old 03-19-2011, 05:46 PM
  #4  
lucky131969
Tech Contributor
 
lucky131969's Avatar
 
Member Since: Jan 2007
Location: Dyer, IN
Posts: 15,264
Received 71 Likes on 67 Posts

Default

Originally Posted by helga203
He changed his boost level by changing his pulley set up. He was around 7 now he'll be around 16 to 18 with close to 750 to 800.
Does he think he can just change the parts with no tune, and everything is going to just increase in a linear fashion??
Old 03-19-2011, 05:55 PM
  #5  
trevheff
Heel & Toe
 
trevheff's Avatar
 
Member Since: Feb 2011
Location: denver colorado
Posts: 24
Likes: 0
Received 0 Likes on 0 Posts
Default

what all does he have done to the motor so he wont blow it with that much boost?
Old 03-19-2011, 06:00 PM
  #6  
helga203
Safety Car
Thread Starter
 
helga203's Avatar
 
Member Since: Jul 2010
Location: chicago IL
Posts: 4,935
Received 434 Likes on 373 Posts

Default

Originally Posted by lucky131969
Does he think he can just change the parts with no tune, and everything is going to just increase in a linear fashion??
I guess he had someone awhile back change his 37 to 60 and he said it ran good accept for some idle issues,but he was going to get it tuned and the tuner said with his new pulley set up it was possible that the 60's were not enough they said they would put 80's in before the tune and charge him 800 ish . I told him what heck lets try putting the 80's in ourself and save some money, it cost him under 500 and a lunch for me. so that's were he stands.So he is getting tune but the tuner is now backed up and it take a few weeks to get to it.Since i now nothing about injector if they have to be reprogramed or not.Figure i ask forum if it was something easy,so the tuner don't charge him extra for nothing.
Old 03-19-2011, 06:00 PM
  #7  
crainholio
Pro
 
crainholio's Avatar
 
Member Since: Mar 2004
Posts: 653
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by helga203
Changed my friends injectors from 60 to 80 same brand(siemems).His car run fine before now with new injectors when he gets on it and it starts hitting 4k to 5k seems like the injectors turn off is that possible. He has A&A 1000hp fuel system. Car ran fine with 60 in it,But not with the 80's only at wot is when they seem to shut off. Give it a few secs then the car will run normal again,at regular driving, but not at wot. Any thoughts.
Sounds like no recalibration was done, and the PCM thinks he still has 60# injectors in there.

PE kicks in, blows a lot of extra fuel down, and the engine can't burn it all.
Old 03-19-2011, 06:10 PM
  #8  
lucky131969
Tech Contributor
 
lucky131969's Avatar
 
Member Since: Jan 2007
Location: Dyer, IN
Posts: 15,264
Received 71 Likes on 67 Posts

Default

Originally Posted by helga203
I guess he had someone awhile back change his 37 to 60 and he said it ran good accept for some idle issues,but he was going to get it tuned and the tuner said with his new pulley set up it was possible that the 60's were not enough they said they would put 80's in before the tune and charge him 800 ish . I told him what heck lets try putting the 80's in ourself and save some money, it cost him under 500 and a lunch for me. so that's were he stands.So he is getting tune but the tuner is now backed up and it take a few weeks to get to it.Since i now nothing about injector if they have to be reprogramed or not.Figure i ask forum if it was something easy,so the tuner don't charge him extra for nothing.
Ok. Here's what I don't understand. He changes the pulley, and that will increase his boost by more the double....maybe more. You installed 80 injectors, and then you guys decide to run the car at WOT with not so much as a base tune for the changes? Rock on, at least the weather is nice....
Old 03-19-2011, 06:13 PM
  #9  
helga203
Safety Car
Thread Starter
 
helga203's Avatar
 
Member Since: Jul 2010
Location: chicago IL
Posts: 4,935
Received 434 Likes on 373 Posts

Default

Originally Posted by trevheff
what all does he have done to the motor so he wont blow it with that much boost?
His engine is completely done.his mechanic set it up for high boost and nitrus.so what ever is in could handle it. Its in iron block 360 something.
Old 03-19-2011, 06:36 PM
  #10  
Bill Curlee
Tech Contributor

Support Corvetteforum!
 
Bill Curlee's Avatar
 
Member Since: Dec 1999
Location: Anthony TX
Posts: 32,736
Received 2,180 Likes on 1,583 Posts
CI 6,7,8,9,11 Vet
St. Jude Donor '08

Default

You need to retune it for the larger injectors. I'm surprised it runs as good as it does with out the retune. Until then, its not going to run correctly.

BC
Old 03-19-2011, 06:53 PM
  #11  
helga203
Safety Car
Thread Starter
 
helga203's Avatar
 
Member Since: Jul 2010
Location: chicago IL
Posts: 4,935
Received 434 Likes on 373 Posts

Default

Originally Posted by Bill Curlee
You need to retune it for the larger injectors. I'm surprised it runs as good as it does with out the retune. Until then, its not going to run correctly.

BC
Thank you bill as always your the best.

Get notified of new replies

To Changed 60 to 80 injector.




Quick Reply: Changed 60 to 80 injector.



All times are GMT -4. The time now is 08:02 AM.