Fuel Injectors
#1
Fuel Injectors
Hey, I'm about to install a new cam (see signature) with a Walbro 255LPH fuel pump and wondered if you think I'll need new fuel injectors. Seems that everyone loves the ID850s, but I'm suffering from a bad case of sticker shock. I could get a matched set of Bosch EV14 (80lb) injectors for $500. Advice?
#7
Given your power levels I'd stick with what you have. Bear in mind you'll need to rescale your tune with new injectors so more money for your tuner there. Unless your duty cycle is hitting 90%+ you're fine. Besides, injectors are not very hard to swap out later on if needed.
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#9
#10
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iTrader: (12)
As far as sizing, here's a link for you....... http://www.rceng.com/technical.aspx?...gags7HmIxlcEyX
#11
If you oversize too much without this you will be running very rich, risk messing up a sensors/cats etc in the process.
#12
Maybe but not recommended. I would 'borrow' a flash tool (efi/hp tuners), get your tuner to update the base injector tables of your tune, flash it, then drive it to your tuner. This is the safe way.
If you oversize too much without this you will be running very rich, risk messing up a sensors/cats etc in the process.
If you oversize too much without this you will be running very rich, risk messing up a sensors/cats etc in the process.
Anyway, it looks like I'm going to have to get a SCT X3 to allow my tuner to send me a remote tune. Blargh. $500 down the hole. Anyone have one that I can borrow, or are they VIN locked?
#17
All of the matched injector options cost the same (except the really large injectors) from this particular vendor, so I went with the biggest injectors in the price bracket. Even if I don't need these, shouldn't they make tuning easier than 8 unmatched 62 lb injectors because a) they're matched and b) their duty cycle will be lower?
#18
I'm installing a Walbro 255LPH pump and a matched set of Bosch 73lb (@ 58 psi) fuel injectors. According to my research, I should be pushing 95 psi with the pump. Can you say "1% duty cycle?" When I'm done with this round of upgrades, I should be making 450 RWHP and have enough injector for 800 RWHP. *sigh*
Anyway, it looks like I'm going to have to get a SCT X3 to allow my tuner to send me a remote tune. Blargh. $500 down the hole. Anyone have one that I can borrow, or are they VIN locked?
Anyway, it looks like I'm going to have to get a SCT X3 to allow my tuner to send me a remote tune. Blargh. $500 down the hole. Anyone have one that I can borrow, or are they VIN locked?
Don't know what an sct x3 is. Cheapest way for tunes is an efi autocal (they come with a single vin license that can be expanded to 5 I believe). Go for about $300. Never used one but I know lots of people who remote tune do. A vin license for EFI gear is about $100 per license. Alternatively buy a full blown efi v2 flashscan for $800 (comes with 3 licenses), then resell it. Should cost you a lot less. Hell I might even buy it as I need a second one. Or you can always use it for remote tune updates, it's always good to spend a few days logging and getting your tuner to adjust your tune for everyday driving.
Don't sweat it too much, I'm running a 90lbs injectors at 4 bar on mine. No tuning issues and the folks at FIC sent me a nicely formatted table also, so was a 2 min job to get her up and running. Actually they recommended this vs. 60/70lbs injectors as they have a heavily reworked nozzle on their big injectors which is very popular apparently. So if you got them from the nice chaps at FIC make sure they send you the GM tables.
BTW, bear in mind TVS units use LS9 style injectors, they are teeny tiny so your regular ls1/2 injectors won't fit without some retro kits/spacers etc.
Last edited by ichpen; 03-21-2012 at 07:39 AM.
#20
The ls9 injectors are considerably smaller than the ls2 style. You'll need fuel rail spacers (if such a thing exists) I suspect if you want to reuse them on the tvs fuel rails as they are too tall. I opted to avoid complication and just bought a new set of resized ls9 injectors from FIC.
I have my original ls9 injectors up for sale if you're interested for cheap.
Last edited by ichpen; 03-21-2012 at 08:11 AM.