greggbruce

iTrader: (1)

thoughts/opinions requested:

running a stock '87 5.7 chip in a slightly modified '89 305 (mild cam, slightly ported heads/intake/plenum, small headers no AIR, no catalytic, new 19lb injectors) both TPI

think there would be a performance increase?? side effects?

Orr89RocZ

iTrader: (20)

Probably can work, except 87 has cold start injector programming in the chip while 89 does not. Not sure how it will react. I guess since injector isnt present on the 89, it shouldnt matter but then your cold start fueling may be incorrect and hard to start.
350 chip has 22 lb inj while 305 has 19, that will change fueling some. Being mass airflow however i would try both stock 305 chip and 350 to see which compensates best.

Then get into chip tuning and do it right.

greggbruce

iTrader: (1)

agreed, am in the process, but need some more hardware and am looking at the sheer volume of info on here about this stuff, and am fighting with the desire to 'have it all RIGHT NOW' ...

just thought this might work in the meantime.

alvanwie

Being a MAF system, I would stay with the 89 - 305 chip. Should handle the mild mods just fine for fueling. You maybe able to bump up the timing at the distr. slightly to improve performance.

ninetyone

iTrader: (2)

That may make it run, but with 19lb injectors and an injector setting of 22lbs in the 350 chip, you are going to run very lean.

MrWillys

I would stick with the 305 chip for the cold start injector alone. Do you have a number from these new injectors, and know what your fuel pressure is?

greggbruce

iTrader: (1)

yeah, I just got the whole set of injectors from southbayinjectors.com, and it has a brand new fuel pump and filter. this car was resurrected from the tow lot. had been sitting for 6 years. it got all new brakes, tires, heads, ect.... its amazing what 6 years of sitting still will rot.

haven't actually put the fuel pressure gauge on it...

got me a new chip ordered just yesterday. and the adapter thingy from moates, gonna deal with that for now while I'm still learning the whole making my own chip thing.

MrWillys

If they sold you Yellow Bosch 280-155-700's you need your pressure up around 45 to 46 set with vacuum disconnected. Reconnect vacuum after setting pressure.

greggbruce

iTrader: (1)

MrWillys

read that for me. I can't find 280-155-771?

greggbruce

iTrader: (1)

yep, 771, that's what they sent me, I think on the flip side it's a ford injector....(yuk) but she said this was the one. She said it's got a better spray pattern.

MrWillys

Let me say this: The 89 ANYX BCC programs stock at 19.5 lbs for flowrate.
The closet thing I could find on your injector is this:
http://www.eter-mot.info/?1603,wtrys...3e-b5a-f73eb5a
This shows 190 cc, and 200 cc is 19 lbs. Another site showed these injectors at 17 lbs. When you consider they are used in Ford 2.5L 6 cylinder my gut tells me you're a bit undersized. Can you turn pressure up with an adjustable regulator? Run these to start at 48 to 50 psi. Watch your blm counts.

You could ask if you could send them back and get 280-155-700's. They'll say these are 350, but my tests prove otherwise. You could run these at 44 to 45 psi all day and be real close.

greggbruce

iTrader: (1)

ok, thx, when I get another chance I will check the BLM and see where it's at. There is no adjustable fpr at this time, but there sure can be in the future if needed. I could also check what it will run with the vacuum line plugged as well.

Ronny

iTrader: (1)

Is a VAFPR not required? Due to the BPC referenced to a MAP table? But MAF does not use a MAP sensor so maybe vafpr is optional?

greggbruce

iTrader: (1)

ok, I have found that the current chip I have now the 2 parameters for fuel injector size are:
Single Fire FI Size @ 40psig is set to 18.0
Double Fire FI Size @ 40psig is set to 18.19

if I have the power to burn a new chip should these be set to 17 ?
would that be the same as turning up the fuel pressure? (therefore I would not have to buy an adjustable fpr?

the pressure currently is 36 with the vacuum plugged in at idle in park, 41 unplugged.

also, what's the difference between single fire and double fire?? why are there 2 different parameters?

RBob

iTrader: (1)

I don't think that the single fire parameter is used. Either way just set them both to the 17 #/hr and you are good to go.

RBob.