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

A&A kit - need to add meth?

 
Old 03-05-2019, 11:27 AM
  #1  
jeffinavette
CF Senior Member
Thread Starter
 
Member Since: Dec 2009
Posts: 230
Thanked 19 Times in 14 Posts
Default A&A kit - need to add meth?

So i installed my A&A kit. Installation was smooth and easy. Got the car down to my tuner and was set to get tuned. The car is a A8 with factory exhaust manifolds and a xpipe back exhaust. I went with the 3.8 pulley for the reason of not having longtubes. Keep in mind the weather was about 20 degrees yesterday for the tune. We started to make pulls and the car was running out of fuel quick! I was only expecting to make around 550 and thought that meth wouldnt be needed to achieve this. I was wrong. Around 4600 rpm we were seeing 7lbs of boost and were out of fuel. I was recommended to come back with a meth kit installed.

What is the best meth kit for our cars? On my 5th gen camaro, i had a aem setup. Im leaning towards a dual nozzle alky control setup with a M10 and M15 nozzle. Thoughts?
jeffinavette is offline  
Old 03-05-2019, 12:06 PM
  #2  
robert miller
CF Senior Member
 
robert miller's Avatar
 
Member Since: Jan 2007
Location: cookeville tennessee
Posts: 26,518
Thanked 1,144 Times in 1,038 Posts
Default ttt

Yes you need meth just for ins reason on what you have got here you only need a one nozzle one 15 will do good for the stock motor other than the blower on the car.. Robert
robert miller is offline  
Old 03-05-2019, 03:26 PM
  #3  
C7&7
CF Senior Member
 
C7&7's Avatar
 
Member Since: Mar 2010
Location: DFW TX
Posts: 5,155
Thanked 207 Times in 178 Posts
Default

You shouldn't need meth at 7psi. Where were they seeing you "run out of fuel"? On the rail pressure or the low side pressure? There are hundreds of cars running around with a Si trim or Novi1500 at 7-8 psi without meth. Call Andy at A&A he will probably just send you a tune for this exact setup. Your tuner either isn't familiar enough with the LT or just trying to sell you a meth setup.

Don't get me wrong adding meth isn't a bad idea and it defiantly gives you room to grow, but for your current setup you don't need it to fuel.

If you choose to do it then you just need one 10gpm or 15 and go with Alky.

Last edited by C7&7; 03-05-2019 at 03:27 PM.
C7&7 is offline  
The Following User Says Thank You to C7&7 For This Useful Post:
A320Flyer (03-05-2019)
Old 03-05-2019, 03:54 PM
  #4  
hogurt
CF Senior Member
 
hogurt's Avatar
 
Member Since: Oct 2002
Location: Fairview Hts. IL
Posts: 1,810
Thanks: 0
Thanked 13 Times in 13 Posts
Default

Originally Posted by C7&7 View Post
You shouldn't need meth at 7psi. Where were they seeing you "run out of fuel"? On the rail pressure or the low side pressure? There are hundreds of cars running around with a Si trim or Novi1500 at 7-8 psi without meth. Call Andy at A&A he will probably just send you a tune for this exact setup. Your tuner either isn't familiar enough with the LT or just trying to sell you a meth setup.

Don't get me wrong adding meth isn't a bad idea and it defiantly gives you room to grow, but for your current setup you don't need it to fuel.

If you choose to do it then you just need one 10gpm or 15 and go with Alky.
YES...This!

i had the same question, which component did you see running out of fuel. The first bottleneck should be the hpfp, and it is definitely going to be ok to 550-575whp.

Something is is not right...
hogurt is offline  
Old 03-05-2019, 05:06 PM
  #5  
robert miller
CF Senior Member
 
robert miller's Avatar
 
Member Since: Jan 2007
Location: cookeville tennessee
Posts: 26,518
Thanked 1,144 Times in 1,038 Posts
Default

Originally Posted by C7&7 View Post
You shouldn't need meth at 7psi. Where were they seeing you "run out of fuel"? On the rail pressure or the low side pressure? There are hundreds of cars running around with a Si trim or Novi1500 at 7-8 psi without meth. Call Andy at A&A he will probably just send you a tune for this exact setup. Your tuner either isn't familiar enough with the LT or just trying to sell you a meth setup.

Don't get me wrong adding meth isn't a bad idea and it defiantly gives you room to grow, but for your current setup you don't need it to fuel.

If you choose to do it then you just need one 10gpm or 15 and go with Alky.
I agree with Andy will send you a tune for your car man he did me with no problem & it work great for my car. Andy is one of the best vendors in here as far as helping a person with his set up... Robert
robert miller is offline  
Old 03-05-2019, 05:10 PM
  #6  
Late Model Racecraft
Supporting Vendor
 
Late Model Racecraft's Avatar
 
Member Since: Nov 2010
Posts: 3,300
Thanked 178 Times in 122 Posts
Default

The stock fuel system should be fine on a blower only setup making 7-8lbs of boost. Like others have stated, a meth system will definitely help with fueling when trying to make more power in the future and/or help with IATs with your current setup.
__________________
FIRST C7 Corvette in the 7's & 9's
Current C7 World Record Holder 7.55 @ 184 MPH

Quickest and Fastest GEN5 LT Powered Vehicle
LMR1200HP Supercharged C7 8.84 @ 160
LMR1200HP Twin Turbo C7 [email protected]
2 TIME OUTLAW DRAG RADIAL LSX CHAMPION 2008/2010
9.47 ZR1 Corvette-2009
FIRST 2010 CAMARO in the 9's-2010
HOME OF THE FASTEST LSx'S IN THE WORLD!!
Late Model Racecraft
713-466-9900
Latemodelracecraft.com
Too many PMs, please call or email instead, thanks!
Late Model Racecraft is offline  
Old 03-05-2019, 05:34 PM
  #7  
SK360
CF Senior Member
 
SK360's Avatar
 
Member Since: Apr 2007
Location: Pittsburgh PA
Posts: 2,117
Thanked 179 Times in 128 Posts
Default

I ran out of fuel on a 3.8 pullied V3 Si with factory exhaust. Power fell on its face at 6100rpm. I was also making more like 10psi on that setup. I added a LT4 HPFP and catless longtubes and max boost dropped to 8.5 PSI and I picked up 57rwhp... no meth here

Last edited by SK360; 03-05-2019 at 05:35 PM.
SK360 is offline  
Old 03-05-2019, 05:38 PM
  #8  
C7&7
CF Senior Member
 
C7&7's Avatar
 
Member Since: Mar 2010
Location: DFW TX
Posts: 5,155
Thanked 207 Times in 178 Posts
Default

Originally Posted by SK360 View Post
I ran out of fuel on a 3.8 pullied V3 Si with factory exhaust. Power fell on its face at 6100rpm. I was also making more like 10psi on that setup. I added a LT4 HPFP and catless longtubes and max boost dropped to 8.5 PSI and I picked up 57rwhp... no meth here
Right the moment you start peaking over the 8psi mark you need some type of fuel help. Meth is the easiest (and cheapest) at that point, then LT4 hardware, then a cam. Or ALLLLL of it and SEND it.
C7&7 is offline  
Old 03-05-2019, 05:48 PM
  #9  
SK360
CF Senior Member
 
SK360's Avatar
 
Member Since: Apr 2007
Location: Pittsburgh PA
Posts: 2,117
Thanked 179 Times in 128 Posts
Default

Originally Posted by C7&7 View Post
Right the moment you start peaking over the 8psi mark you need some type of fuel help. Meth is the easiest (and cheapest) at that point, then LT4 hardware, then a cam. Or ALLLLL of it and SEND it.
LOL. Thatís how pistons get sent as well :X

Exactly what I was seeing. LT4 fuel pump fixed my issues, had plenty of fuel to 6600RPM.
SK360 is offline  
Old 03-05-2019, 05:53 PM
  #10  
pj-c7
CF Senior Member
 
pj-c7's Avatar
 
Member Since: Dec 2016
Location: Boston Ma
Posts: 111
Thanked 15 Times in 14 Posts
Default

Interesting thread....Was the LT4 fuel pump alone enough to solve your issues or did the pump also require CAM and/or injectors?


TIA,

Pj
pj-c7 is offline  
Old 03-05-2019, 05:56 PM
  #11  
SK360
CF Senior Member
 
SK360's Avatar
 
Member Since: Apr 2007
Location: Pittsburgh PA
Posts: 2,117
Thanked 179 Times in 128 Posts
Default

Originally Posted by pj-c7 View Post
Interesting thread....Was the LT4 fuel pump alone enough to solve your issues or did the pump also require CAM and/or injectors?


TIA,

Pj
In my case just the LT4 HPFP solved the drop in fuel pressure we were seeing at 6100RPM.
SK360 is offline  
The Following User Says Thank You to SK360 For This Useful Post:
pj-c7 (03-05-2019)
Old 03-05-2019, 06:00 PM
  #12  
robert miller
CF Senior Member
 
robert miller's Avatar
 
Member Since: Jan 2007
Location: cookeville tennessee
Posts: 26,518
Thanked 1,144 Times in 1,038 Posts
Default ttt

Originally Posted by C7&7 View Post
Right the moment you start peaking over the 8psi mark you need some type of fuel help. Meth is the easiest (and cheapest) at that point, then LT4 hardware, then a cam. Or ALLLLL of it and SEND it.
I agree buddy just a dam snow ball game you chg one thing that leads to a diff set of problems for something else... Robert
robert miller is offline  
Old 03-05-2019, 06:09 PM
  #13  
SK360
CF Senior Member
 
SK360's Avatar
 
Member Since: Apr 2007
Location: Pittsburgh PA
Posts: 2,117
Thanked 179 Times in 128 Posts
Default

Here are my before and afters. First one was V3 Si 3.8" Pulley and all stock exhaust except Borla X-Pipe. They couldn't get more than 11* timing in it and fuel was checking out around 6100, can see the fall on the graph. Second graph has nothing changed except LT4 HPFP and 1 7/8" Catless longtubes, not directly comparable due to being different dynos but at least shows that power carries out. Ignore the red line, that was a test pull on the tune it rolled in on and we were having RPM pickup issues (which is why X axis is in MPH). Best pull was 617/575 but that graph has ugly torque due to the RPM pickup issues.



Last edited by SK360; 03-05-2019 at 06:11 PM.
SK360 is offline  
Old 03-05-2019, 06:24 PM
  #14  
C7&7
CF Senior Member
 
C7&7's Avatar
 
Member Since: Mar 2010
Location: DFW TX
Posts: 5,155
Thanked 207 Times in 178 Posts
Default

Pretty simple tried and true tribal knowledge. 7-8 PSI you ok without fueling help.

Anything over 8 you need to start considering meth, LT4 hardware, cam or a combination of them.

Then you hit the 700 rwhp (ish) mark where you start needing to think about pistons.
C7&7 is offline  
Old 03-07-2019, 02:38 PM
  #15  
Ghostnotes
CF Senior Member
 
Ghostnotes's Avatar
 
Member Since: May 2017
Location: Pasadena Texas
Posts: 382
Thanked 19 Times in 16 Posts
Default

My fuel pressure is good all the way to 7000 with my YSI and a 3.8. Buuuuut my injector pulsewidth is 6.2ms..
Ghostnotes is offline  
Old 03-07-2019, 02:45 PM
  #16  
jeffinavette
CF Senior Member
Thread Starter
 
Member Since: Dec 2009
Posts: 230
Thanked 19 Times in 14 Posts
Default

Originally Posted by Ghostnotes View Post
My fuel pressure is good all the way to 7000 with my YSI and a 3.8. Buuuuut my injector pulsewidth is 6.2ms..
They werent comfortable making the pulsewidth anything over 5 i believe.
jeffinavette is offline  
Old 03-07-2019, 03:07 PM
  #17  
Ghostnotes
CF Senior Member
 
Ghostnotes's Avatar
 
Member Since: May 2017
Location: Pasadena Texas
Posts: 382
Thanked 19 Times in 16 Posts
Default

Same here.

Think im going to go with the FIC injectors and modified HPFP. Just don't want to deal with any more controllers. Just purchased a boost controller and am going to use that so I can pulley down a bit to get on boost sooner then cap it at 10psi for now.
Ghostnotes is offline  

Thread Tools
Search this Thread
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: