305 tpi to 350 tpi - Third Generation F-Body Message Boards

Nater36 · 09-24-2009, 04:30 PM

swapping out my 305 to a reman 350 tpi. Has a t5. am i ok to keep the 305 knock sensor and original prom? I have the tuning equipment just havnt used it yet. What all am i going to need to tackle?
89 MAF

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regal301 · 09-24-2009, 05:16 PM

different prom,injectors,new 350 knock sensor....................

and if you run it hard,a new t5

1MeanZ · 09-25-2009, 08:02 AM

you'll need the 350 knock module as well. The 305 knock sensor and knock module are calibrated differently than the 350 pieces..... Well they are different part numbers anyway, so draw your own conclusions.

Since its a MAF car you'll be OK for now with the stock PROM as long as you use the 19lb fuel injectors from the 305. If you run bigger injectors you'll have to change the injector constant in the chip.

Nater36 · 09-25-2009, 08:52 AM

the knock module??
I have a new set of 350 injectors, 21 or 22 whichever was stock size.

regal301 · 09-25-2009, 08:59 AM

its right next to the brake booster.its also called the electronic spark control module.

http://www.autozone.com/autozone/cat...&parentId=62-0

regal301 · 09-25-2009, 09:01 AM

the car will run and be driveable without it,but to fine tune the car you need it.
the prom and injectors are the most important part.

Nater36 · 09-25-2009, 09:28 AM

ok, ill get those two items then.
Im not going to need to switch anything in the prom other than injector size?

regal301 · 09-25-2009, 09:39 AM

i dont burn my own proms, i have them done.

someone else can answer that as i dont know for sure

Nater36 · 09-25-2009, 09:51 AM

o, ok

1MeanZ · 09-25-2009, 01:26 PM

Quote:

Originally Posted by Nater36

ok, ill get those two items then.
Im not going to need to switch anything in the prom other than injector size?

No you should be OK with just changing the injector constant. If the 350 is bone stock and you can burn chips, why don't you just burn a stock 350 tune to the chip?

Nater36 · 09-25-2009, 02:57 PM

because of the t5. all 350's have autos, wouldnt that mean problems?

1MeanZ · 09-25-2009, 11:02 PM

no problems really. You can copy some of the stall saver and idle speed values from the 305 .bin if you want.

Let me clarify, i'm speaking in generalizations here. For the car to be absolutely perfect in every way, you'll need to do a little work to mesh the 305/T5 bin with the stock 350 bin. But it will run great and you wont have any major issues if you run the stock 350 bin, or put the correct injector constant in your 305 tune.

Nater36 · 09-26-2009, 01:06 PM

alright, cool, thats what i like to hear