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Old 10-25-2009, 08:01 PM   #1
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Default 1.8 injector max boost?

Well as per usual the search has given me nothing. Amazing as you would think "injectors" would give pages of results.

Anyway, car is a 1.6 92. It is on M/S already and will be getting a DSM t25 in the (hopefully) near future, it's in the garage waiting to go on. I have looked over the turbo faq and haven't found the answer I need. according to that (the faq) 1.8 injectors should be good up to 9 psi with an afpr. But if I am on M/S and therefore controlling the pulse width as opposed to the pressure, how far will they go? Reason I ask of course is I can pick up a set for peanuts, whereas rc's or rx7 injectors are harder to find, and cost real money.
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Old 10-25-2009, 08:04 PM   #2
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Fail. Look right above your post to the "DIY FAQ" sticky.

https://www.miataturbo.net/forum/t4288/
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Old 10-25-2009, 08:15 PM   #3
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Quote:
Originally Posted by Blaize View Post
Well as per usual the search has given me nothing. Amazing as you would think "injectors" would give pages of results.

Anyway, car is a 1.6 92. It is on M/S already and will be getting a DSM t25 in the (hopefully) near future, it's in the garage waiting to go on. I have looked over the turbo faq and haven't found the answer I need. according to that (the faq) 1.8 injectors should be good up to 9 psi with an afpr. But if I am on M/S and therefore controlling the pulse width as opposed to the pressure, how far will they go? Reason I ask of course is I can pick up a set for peanuts, whereas rc's or rx7 injectors are harder to find, and cost real money.
I'll get straight to the point: they won't support more than 8-10psi if we're talking pump gas.
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Old 10-25-2009, 08:24 PM   #4
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Yeah right back atcha curly, as I said in my post I have read the FAQ, I needed a bit of clarification on what it says.

Thanks 18psi, so I presume that be it by fuel pressure or opening time they just can't cut it. I'll find some bigger ones then.
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Old 10-25-2009, 08:26 PM   #5
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Exactly. They're maxed out either way. Get the supra 305's if you're on a super low budget, they're about the same price but bigger.

But I seriously wouldn't dick around with the puny injectors if I was you man. You can get 460's/550's for 60 bux, another 80 to clean/test them and you've got good injectors with headroom.
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Old 10-25-2009, 08:34 PM   #6
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Wow I didn't realise they were going for so cheap. Everything I have seen on this side of the pond has been a fair bit more than that. I'll just have to keep my eyes open and get a set from the homeland then
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Old 10-25-2009, 08:54 PM   #7
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Anyone happen to know what size the MSM runs? I've got NB 1.8's that I'll use at wastegate pressure and upgrade when I start turning the boost up, curious what (if any) differences there are between the OEM Turbo injectors and the N/A injectors.
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Old 10-25-2009, 09:02 PM   #8
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I think the msm runs the 265's. Not 100% sure but its something small like that. Definitely not a worthwhile upgrade over the regular 1.8 injectors
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Old 10-28-2009, 04:11 PM   #9
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At least on my area is super difficult to spot an RX-7 that has not been stripped to bare metal so I go to RX7Club.com in the for sale wanted section.

I got mine for 100.00 and that was before the economy crashed 2 years ago and still 2009 they are still sold for the same amount. Stick with good trade score as there has been many and I mean many on the RX7 forums who have gotten burned with dead bit sellers.

Did the typical, injector-rehab.com and came back as good as new, two were almost shut.
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Old 10-28-2009, 04:14 PM   #10
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There are 460's/550's being sold on here quite frequently. I think there's a set for sale right now too. In the classifieds
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