89 mustang

hey guys i need some help i'm trying to keep my motor in one pice.

ok i have a 347 stroker supercharged 10.1 compression on 7-8 psi and need healp on a little tuning i'm using a tweecer to tune with and i also have a wide band o2.. i need to know how much timming to run at first and then go up from there. i have been doing some resurch and people say to start at 12% some at 10% of timming now i dont understang if they are talking of base timming or total timing?? i know my motor NA likes 36% total timing..
also what would be a good a/f??? i was thinking 12.5
can any one give me a hand on this

TrimDrip

Total timing I would start low and work up. Like a half degree every pull. I am not sure what my timing is at because I didn't tune it but, I believe it is around 18 total.

The air fuel ratio of 12:5 is a little lean. My car runs best at 11:8.

I will probably go 12:1 on my next tune and add meth. That way if the meth fails I won't blow anything up.

89 mustang

thanks for ur healp got it on the dino and she put out 490whp and 497wtrq on 6psi with pump gas.. i had set my total timing at 14% then wint up to 19%
air/fuel was right at 11.8, i only got to do 3 pulls for 80 bucks and this is what we got..

TrimDrip

cool

89 mustang

ok guys i have my methanol set up on my car now and was woundering how much timing should i add now that im on meth can any one give me an idea? my buddy said to run 3* so that would put me right at 22* total.. or would it need more?

TrimDrip

are you sprayng pre or post compressor?

89 mustang

after the charger. im at 22* right now just got back from the track and ran a 10.7 at 128 my a/f at 11.4 to keep it safe.. think i can creep up the timing a lil at a time just kinda want to know how much would beto much

TrimDrip

Running post compressor, you really don't have to worry about the meth upping the boost. If running pure meth, I would think you would be fine with 3 degrees. I would get a baseline and then turn on the meth and see where it starts to speed up. My last motor was 9:5:1 and would run on 26 degrees.

If the block is stock, I would consider that too.

89 mustang

hey guys here is a up date.. got retuned on methanol on 6 psi and maid 500whp and 501wtrq. total timing was 26* so i only gaind 10hp and 5 torque from b for.. max trq was at 4500 and max hp was at 4800,at 5500 my power died off bad.. so now i took off the v1-b charger and instald a new vortech v3 and puts out 9psi runs way better. right now i have my timing set at 20 total and 11.4 a/f till i get it on the dino again.. i know im pushing the limets and will dino it soon to see what she puts out if i can keep it in one pice!!

still 500whp is fun tho but i want to be in the 550whp.