C7 Forced Induction/Nitrous C7 Corvette Turbochargers, Superchargers, Pulley Upgrades, Intercoolers, Wet and Dry Nitrous Injection, Meth
Sponsored by:
Sponsored by:

Nitrous in Direct Injected Applications

 
Old 10-29-2013, 10:25 PM
  #1  
carlrx7
CF Senior Member
Thread Starter
 
carlrx7's Avatar
 
Member Since: Feb 2008
Location: Charleston SC
Posts: 3,712
Thanks: 0
Thanked 1 Time in 1 Post
St. Jude Donor '08-'09
Default Nitrous in Direct Injected Applications

I've searched but had no luck, hoping someone can explain..

1) Is Nitrous used different when applying it to a DI engine?

2) Is it sprayed into the manifold like before with a plate or nozzle?

3) Can we still run a dry setup?

4) Is a Nitrous backfire still possible with a wet kit on an DI engine?

5) I thought the main purpose of DI was to be able to inject ALL the fuel at the last second to avoid a pre-ignition event, but if the Nitrous gets into the cylinder first, can pre-ignition now occur?

Thanks!

-Carl
carlrx7 is offline  
Old 10-29-2013, 11:05 PM
  #2  
Shurshot
CF Senior Member
 
Member Since: Jan 2005
Location: Lake Wylie SC
Posts: 8,228
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Originally Posted by carlrx7 View Post
I've searched but had no luck, hoping someone can explain..

1) Is Nitrous used different when applying it to a DI engine?

2) Is it sprayed into the manifold like before with a plate or nozzle?

3) Can we still run a dry setup?

4) Is a Nitrous backfire still possible with a wet kit on an DI engine?

5) I thought the main purpose of DI was to be able to inject ALL the fuel at the last second to avoid a pre-ignition event, but if the Nitrous gets into the cylinder first, can pre-ignition now occur?

Thanks!

-Carl
By itself N2O is not flammable

http://answers.yahoo.com/question/in...7010529AAhpQgT
Shurshot is offline  
Old 10-30-2013, 12:11 AM
  #3  
carlrx7
CF Senior Member
Thread Starter
 
carlrx7's Avatar
 
Member Since: Feb 2008
Location: Charleston SC
Posts: 3,712
Thanks: 0
Thanked 1 Time in 1 Post
St. Jude Donor '08-'09
Default

Originally Posted by Shurshot View Post
Thanks Mr.GOOGLE, most people know that. What question were you trying to answer?
carlrx7 is offline  
Old 10-30-2013, 02:44 AM
  #4  
VIN666
CF Senior Member
 
Member Since: Sep 2008
Location: NY
Posts: 635
Thanks: 0
Thanked 0 Times in 0 Posts
Default

One question I would like to ad, is where you get the fuel for a wet kit from?
VIN666 is offline  
Old 10-30-2013, 04:00 AM
  #5  
carlrx7
CF Senior Member
Thread Starter
 
carlrx7's Avatar
 
Member Since: Feb 2008
Location: Charleston SC
Posts: 3,712
Thanks: 0
Thanked 1 Time in 1 Post
St. Jude Donor '08-'09
Default

Hmmm. Good question. I would think it would need to be before the high pressure pump, but where to tap would be nice to know.
carlrx7 is offline  
Old 10-30-2013, 04:21 AM
  #6  
walhan_qtr
CF Senior Member
Support Corvetteforum!
 
walhan_qtr's Avatar
 
Member Since: Oct 2008
Location: Ft. Collins, CO
Posts: 3,950
Thanks: 0
Thanked 7 Times in 6 Posts
Default

I asked couple times (on both threads that had those C7s with nitrous) and no one shared any pictures or info. I asked Nitrous outlet and they said they are running a stand alone in the back hatch to get their fuel.

I am interested to know about the other questions though...
walhan_qtr is offline  
Old 10-30-2013, 05:55 AM
  #7  
Shurshot
CF Senior Member
 
Member Since: Jan 2005
Location: Lake Wylie SC
Posts: 8,228
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Originally Posted by carlrx7 View Post
Thanks Mr.GOOGLE, most people know that. What question were you trying to answer?
Because you asked this


..........
.but if the Nitrous gets into the cylinder first, can pre-ignition now occur?
Shurshot is offline  
Old 10-30-2013, 07:55 AM
  #8  
VIN666
CF Senior Member
 
Member Since: Sep 2008
Location: NY
Posts: 635
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I assume he was talking about a wet shot...
VIN666 is offline  
Old 10-30-2013, 09:35 AM
  #9  
Frans96ss
Supporting Vendor
 
Frans96ss's Avatar
 
Member Since: Jul 2005
Location: New Castle Del.
Posts: 7,364
Thanked 287 Times in 181 Posts
St. Jude Donor '09
Default

No standalone is needed. Its just like nitrous on any other car. Ours is working great
__________________
Race Proven Motorsports (TAX FREE HORSEPOWER)
SAM Racing
YouTube
FACEBOOK PAGE
302-798-4000
IG @RaceProvenMotorsports

Delawares Number One LSX Performance Shop
Frans96ss is offline  
Old 10-30-2013, 03:54 PM
  #10  
arghx7
Junior Member
 
Member Since: Jul 2013
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Originally Posted by carlrx7 View Post
3) Can we still run a dry setup?
If anyone's done it, and I'm sure at least somebody somewhere has attempted it on some engine, it's not been widely publicized. From the perspective of maxing out the fuel system, I don't think it would be any different than installing an aftermarket blower or turbo system. The fuel pumps (low and high pressure) need to be able to maintain enough fuel pressure. The injector needs to be able to fire long enough, with all the timing considerations involved.

I think where things would get risky is the same place it always does with a dry shot--figuring out how to tell the injectors to deliver more fuel when the engine sensors can't easily detect the additional air.

4) Is a Nitrous backfire still possible with a wet kit on an DI engine?
I would say yes. If fuel is pooling in the intake tract, and the conditions exist to ignite it, yes. Whether that's any worse on a DI pushrod engine with very simple cam phasing system is anybody's guess, but I'd say it's no more likely than it ever was on any Gen III or Gen IV engines.

5) I thought the main purpose of DI was to be able to inject ALL the fuel at the last second to avoid a pre-ignition event, but if the Nitrous gets into the cylinder first, can pre-ignition now occur?l
Normally two injections, with one injection occurring in the compression stroke at low speed high load, can be used for knock relief at low speeds (up to around 2000rpm). Nobody here has reported observing two injection events at high load in a Gen V LT1.

One of the advantages of direct injection from a performance perspective is the cooling effect of spraying right into the cylinder. Since a wet shot introduces very cold air along with the fuel, you're not really losing that benefit by introducing through the mixture to the intake port.
arghx7 is offline  
Old 10-30-2013, 11:49 PM
  #11  
walhan_qtr
CF Senior Member
Support Corvetteforum!
 
walhan_qtr's Avatar
 
Member Since: Oct 2008
Location: Ft. Collins, CO
Posts: 3,950
Thanks: 0
Thanked 7 Times in 6 Posts
Default

Originally Posted by Frans96ss View Post
No standalone is needed. Its just like nitrous on any other car. Ours is working great
where do you get your extra fuel for the plate? this is not just like other car I would assume being a direct injection and the mechanical pump...?? where would you run your line to the plate? pictures of your setup would be nice Thanks
walhan_qtr is offline  
Old 10-31-2013, 04:02 AM
  #12  
VIN666
CF Senior Member
 
Member Since: Sep 2008
Location: NY
Posts: 635
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I take it there is a conventional low pressure pump in the tank, sending fuel to the high pressure pump, therefore one can tap the fuel pre-high pressure.
My assumption.
VIN666 is offline  
Old 10-31-2013, 04:05 AM
  #13  
walhan_qtr
CF Senior Member
Support Corvetteforum!
 
walhan_qtr's Avatar
 
Member Since: Oct 2008
Location: Ft. Collins, CO
Posts: 3,950
Thanks: 0
Thanked 7 Times in 6 Posts
Default

Originally Posted by VIN666 View Post
I take it there is a conventional low pressure pump in the tank, sending fuel to the high pressure pump, therefore one can tap the fuel pre-high pressure.
My assumption.
I am thinking the same way but I don't really know.
walhan_qtr is offline  

Thread Tools
Search this Thread
Quick Reply: Nitrous in Direct Injected Applications


Sponsored Ads
Vendor Directory

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: