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Old 12-31-2015, 10:32 AM   #1
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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?
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Old 12-31-2015, 10:38 AM   #2
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Yes, you need to change all your settigns. Req fuel etc.
Get some EV14 injectors. Either the ones from Trackspeed or ID 1000s.
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Old 12-31-2015, 11:12 AM   #3
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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.
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Old 12-31-2015, 11:25 AM   #4
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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.
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Old 12-31-2015, 11:36 AM   #5
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by a lot do you mean like maybe a days worth of fine tuning?
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Old 12-31-2015, 11:37 AM   #6
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The 610CC injectors I recommended are $300, and will give you more headroom and a better idle.
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Old 12-31-2015, 11:45 AM   #7
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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.
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Old 12-31-2015, 11:56 AM   #8
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Quote:
Originally Posted by aidandj View Post
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.
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Old 12-31-2015, 02:51 PM   #9
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Where are you located
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Old 12-31-2015, 02:57 PM   #10
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im in southeast missouri. south of st louis.
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