MEGAsquirt A place to collectively sort out this megasquirt gizmo

bigger injectors-keep same tune?

Thread Tools
 
Search this Thread
 
Old 12-31-2015, 09:32 AM
  #1  
Junior Member
Thread Starter
 
babydriver's Avatar
 
Join Date: Apr 2014
Posts: 59
Total Cats: 7
Default bigger injectors-keep same tune?

'95, MS2, gt2554 intercooled

So I'm perfectly happy at 8psi but I know I'm at the upper limit of my stock '95 injectors (265cc)

I was going to pick up some 305s or 460s just for peace of mind but I wanted to ask if I needed to change anything in MS. I don't plan on upping boost..

I'm at 11-11.5 at full load but I know my injectors are going full blast anytime I step on the gas.. should I even bother?
babydriver is offline  
Old 12-31-2015, 09:38 AM
  #2  
Elite Member
iTrader: (3)
 
Monk's Avatar
 
Join Date: Apr 2014
Location: Huntington, Indiana
Posts: 2,885
Total Cats: 616
Default

Yes, you need to change all your settigns. Req fuel etc.
Get some EV14 injectors. Either the ones from Trackspeed or ID 1000s.
Monk is offline  
Old 12-31-2015, 10:12 AM
  #3  
Junior Member
Thread Starter
 
babydriver's Avatar
 
Join Date: Apr 2014
Posts: 59
Total Cats: 7
Default

I certainly don't think I need $400 injectors to run 8psi.. the reason I was asking at all is a set of 460s is like $150.
babydriver is offline  
Old 12-31-2015, 10:25 AM
  #4  
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
Default

460s will idle like crap. Which is why ev14s were recommended. At least get rx8 injectors. And yes. You will have to retune a lot.
aidandj is offline  
Old 12-31-2015, 10:36 AM
  #5  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,493
Total Cats: 4,080
Default

by a lot do you mean like maybe a days worth of fine tuning?
Braineack is offline  
Old 12-31-2015, 10:37 AM
  #6  
Elite Member
iTrader: (3)
 
Monk's Avatar
 
Join Date: Apr 2014
Location: Huntington, Indiana
Posts: 2,885
Total Cats: 616
Default

The 610CC injectors I recommended are $300, and will give you more headroom and a better idle.
Monk is offline  
Old 12-31-2015, 10:45 AM
  #7  
Senior Member
iTrader: (3)
 
90 Turbo's Avatar
 
Join Date: Sep 2011
Location: Plano TX
Posts: 595
Total Cats: -1
Default

I changed from460 to the yellow top rx8 injectors I think they r 410cc and ev6 so a newer design with 4 squirts holes instead of 1 on ev1 460cc injectors.
Idle is much more stable afr.
Found them pretty cheap and retuning was not near as much as ev14 which is a huge switch. Req fuel will have to be changed for the larger injectors.

I have some flow force 610 on shelf I have not installed for fear of not being able to tune them.
90 Turbo is offline  
Old 12-31-2015, 10:56 AM
  #8  
Junior Member
Thread Starter
 
babydriver's Avatar
 
Join Date: Apr 2014
Posts: 59
Total Cats: 7
Default

Originally Posted by aidandj
460s will idle like crap. Which is why ev14s were recommended. At least get rx8 injectors. And yes. You will have to retune a lot.
yeah seems like everyone is liking the yellow rx8s and theyre $150. I know I'm a cheap bastard but I can't help it.

I'll also figure out what I need to change to work with them.

I'm not scared of tuning and I'm trying to do my homework.. I just always get hung up on an acronym or concept I don't understand, so I have to stop and figure out what that is.. and I have trouble figuring out how each factor affects everything else in the tune. I think I have a tendency to overthink things when I should just say "ok" and move on.. I also have a pretty terrible attention span on top of that so I do struggle a little bit. There is also nobody else around here running MS I don't have any direct contact with someone that knows what they're doing.. so I do appreciate the replies.
babydriver is offline  
Old 12-31-2015, 01:51 PM
  #9  
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 6,022
Total Cats: 304
Default

Where are you located
thirdgen is offline  
Old 12-31-2015, 01:57 PM
  #10  
Junior Member
Thread Starter
 
babydriver's Avatar
 
Join Date: Apr 2014
Posts: 59
Total Cats: 7
Default

im in southeast missouri. south of st louis.
babydriver is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
curly
DIY Turbo Discussion
103
11-30-2022 10:50 AM
turbofan
Miata parts for sale/trade
14
02-01-2017 10:20 PM
Ben
Miata parts for sale/trade
1
12-22-2015 11:54 AM
vteckiller2000
WTB
4
12-17-2015 04:16 PM
Ste_mx
MSPNP
6
12-10-2015 03:54 PM



Quick Reply: bigger injectors-keep same tune?



All times are GMT -4. The time now is 08:25 AM.