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Old 06-11-2006, 03:18 PM   #1
mams
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Pinging and Injectors

Hey guys

i upgraded my standard 1.8 BA with essentially a bolt on turbo and new ecu, unfortunatly no matter how much tuning i do i cant get rid of the ping. I know this happens more frequently in high compression motors but the ecu tells me that the injectors are at or very close to capacity,. My mate thought i should up the fuel pressure, will the standard fuel pump handel this? also being the standard BP motor, what injectors are best for an upgrade? will BPT injectors work?

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Old 06-11-2006, 04:00 PM   #2
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you can up the fuel pressure with a adjustable fuel pressure regulator. The standard pump can handle that with no worries. There have been great power output from some of the BA Astinas here running a standard pump.

I presume you've checked the obvious thing - the ignition timing ?

I dont know for sure but I presume the BPT injectors would flow better than the BA - no idea if they're compatible.
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Old 06-11-2006, 04:22 PM   #3
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you are currently use 215/220cc injectors - too small for the turbo application you have suggested. gtx injectors are 330cc. 50% bigger! good for up to 150kW atw i think.

you can even get bigger 385/440cc (gtr) injectors also.

if i was you, i would buy a 2nd hand set of gtx injectors ($100-$300)(bigmal had a set for sale a while back) and have them ultrasonicly cleaned for $120. screw them in, replace fuel rail and re-tune.

if you do not have a aftermarket fuel regulatoralready fitted, then buy 1 asap also.

ryan

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Old 06-11-2006, 05:05 PM   #4
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yeh i have an aftermarket regulator.
i read that the gtr and gtx injectors are compatible with the bpt, i assume they are also with the standard bp motor?
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Old 06-11-2006, 05:07 PM   #5
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ph and yeh the timing has been adjusted to the best it can be at the mo... something like 10 degrees less then what the bloke tuning said it could be. So yeh i believe its just the injectors
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Old 06-11-2006, 05:11 PM   #6
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after hearing that - i'm assuming that is only pinging while boost comes on or at high revs eg:- 3500rpm or higher.

or is it in all the rev range? if so then it could be a ignition timing problem as dogo explained before too.

timing should be forward, not back shouldn't it? also - too much adjustment will cause an issue also.

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Old 06-11-2006, 05:12 PM   #7
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just when putting the foot down. normally at about 5-5500 revs

when u say gtr injectors u mean skyline gtr ones?
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Old 07-11-2006, 01:02 AM   #8
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i think he may mean the Familia GTR

my BPT also pings at around the same revs, but i run only the standard(N/A) pump at the moment, I got a malpassi sitting here but i don't know how to install it
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Old 07-11-2006, 06:35 PM   #9
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Quote:
Originally Posted by 323kid
i think he may mean the Familia GTR
correct!
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Old 07-11-2006, 11:01 PM   #10
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ahh ok

we had a look today and rb20 injectors look very similar, without takeing them out. Externally they are pretty well exactly the same length. Has anyone tried them or know their capacity??

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Old 08-11-2006, 01:47 AM   #11
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Have tried RB26 injectors and they fit fine.
I sold all the spare injectors I had dont know if exodus still has his reco GTX ones
may be worth a try.
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Old 08-11-2006, 02:11 AM   #12
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http://www.fordlaser.com/ads_item.php?id=830

BPT set for $120
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Old 08-11-2006, 06:31 PM   #13
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hey
just wondering if anyone knows if the Mazda MX-5 fuel injectors series 2, 3 or 4 with the SVT engine, will suit the ba or their capacity. Isnt the mx5 a very similar motor?

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Old 08-11-2006, 10:05 PM   #14
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again you are putting smaller injectors into a turbo set-up. i would think you'd have the same problem as before with mx-5 injectors.

questions:-
what is the current ecu fitted?
aftermarket?
what was the base map tuned for?
using ba internal coil dissy still?

ryan
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Old 09-11-2006, 02:24 PM   #15
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basically the motor itself is pretty welll untouched. Microtech ecu with bp fuel maps i think is what u wanted to know
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Old 09-11-2006, 04:34 PM   #16
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must have been a custom map mircotech did for you yes? cos the ignition system in a BA is completely different from the standard BG/GTX/BPT system. The GTR and BA have the same ignition systems.

could be why you are pinging. if not adjusted for a different coil/dissy setup, then retardation or incorrect advancement may happen also.

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Old 09-11-2006, 05:15 PM   #17
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i actually think that the computer wouldnt even work if it was wrongly mapped. The first time i got it i had to send it back because it was mapped for the mx5. it didnt actually respond when plugged in. The is a light that lets u know. Well im going to try the new injectors and see how they go. Getting some gtx ones for 150. They will work with the micro shouldnt they?

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Old 09-11-2006, 06:11 PM   #18
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it sounds like it is desperate for a good tune also.

i've done some research - it won't be the ignition system. it'll be the injectors. retune after injectors.

personally wouldn't have used microtech with what you are doing cos it makes it hard to deviate from stock setups. but now that you have it, you have to live with it. just find a really good tuner and have him run it over the dyno heaps.

ryan

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Old 09-11-2006, 06:41 PM   #19
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thanks heaps for your help mate
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Old 12-11-2006, 10:54 AM   #20
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Deejayryry, i have two questions for you...

Quote:
Originally Posted by deejayryry
must have been a custom map mircotech did for you yes? cos the ignition system in a BA is completely different from the standard BG/GTX/BPT system. The GTR and BA have the same ignition systems.
HUH??
The BG 90-94 DOHC BP n/a, GTX and GTR all have the same ignition setups. The only thing that changes is the cams on the BP N/A. Yes I realise they all have different part number stampings (BP05, 26 and BPC8) but they are the same and compatable with a BP mapped microtech. He would have just ordered it to suit a BA astina.

Quote:
Originally Posted by deejayryry
personally wouldn't have used microtech with what you are doing cos it makes it hard to deviate from stock setups. but now that you have it, you have to live with it. just find a really good tuner and have him run it over the dyno heaps.
HUH??
Why isn't a MT suitable for what he is doing? Hard to deviate from stock? WTF? Also, any really good tuner will run it on the dyno just as many times as any other programable ECU.
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