vortech= ping

[BluntEffect]

Hey guys, I need some help with my setup. I installed the v3 and need to know where I should set my timing, FP, and which plugs I should use. I have gt40s and 30lb injectors. I also am running the fmu, should I ditch that or not? Any input would be great!

[NC STANG GUY]

The best thing to do is get larger injectors and have it dyno tuned.

Do you have any way of pulling timing under boost right now?
Did you recal the FMU for use with the 30's?


Whats your complete setup?
Cam,intake,which Vortech kit? Base kit with stock six rib stuff or the HO kit with the 8 rib,timing retard box,t-rex?

Just need a lot more info.

You can run Autolite 103's gapped tight down around .030-032 with the GT40's. They are a little bit colder range.

[BluntEffect]

That was the plan at first, but the money as yet to come. So now I'm going to work with what I already have and try my best to get it running strong!

I have a stock bottom end, v3sci 5-6psi, "worked" gt40s, 1.6 rockers, tfs spring kit, f303, rpm2 intake, 30# inj, EB 70mm TB, 90mm maf, walbro 255, bbk shorties and its 6 rib... I did not recalibrate the fmu because I wasnt sure if it would work in the first place. I have an adjustable fpr so should I just get rid of the fmu? I'm also looking into msd with boost timing, but have heard that its not a must with only 6 PSI???

Current timing is 25 with the spout out and fuel pressure is 40. It seems to be running a little better than when the timing was at 15. Are these numbers safe? Should I leave spout out? And I guess ill try the plugs next! Thx

[fivepointwoahhh]

Bump! Someone help my bud out!

[Silver Sleeper]

i would try a colder plug and bump the FP just a bit..also check your Air Fuel ratio with a wideband. :thumbsup1:

[NC STANG GUY]

That was the plan at first, but the money as yet to come. So now I'm going to work with what I already have and try my best to get it running strong!

I have a stock bottom end, v3sci 5-6psi, "worked" gt40s, 1.6 rockers, tfs spring kit, f303, rpm2 intake, 30# inj, EB 70mm TB, 90mm maf, walbro 255, bbk shorties and its 6 rib... I did not recalibrate the fmu because I wasnt sure if it would work in the first place. I have an adjustable fpr so should I just get rid of the fmu? I'm also looking into msd with boost timing, but have heard that its not a must with only 6 PSI???

Current timing is 25 with the spout out and fuel pressure is 40. It seems to be running a little better than when the timing was at 15. Are these numbers safe? Should I leave spout out? And I guess ill try the plugs next! Thx

Honestly anything you do without a wideband a/f gauge or getting on a dyno with an a/f gauge is just guessing.
If it's pinging it either has too much timing,not enough fuel or even too hot of a plug. If you've heard it ping already that's pretty bad. Doesn't take much of that to lead to a blown head gasket or worse on a s/c car.

I really don't feel 30's are enough without an FMU. It wont take long of 5-6 psi and you'll be ready to move up to 8rib stuff and 10 or so psi anyways,lol. I'd want at least 42's.

I'd rather run timing at 10-12 initial and then have a box to pull around 1-1 1/4 degrees per lb of boost. That way you have more timing down low to make it feel better but it still pulls enough out up top.

[BluntEffect]

I really don't feel 30's are enough without an FMU. It wont take long of 5-6 psi and you'll be ready to move up to 8rib stuff and 10 or so psi anyways,lol. I'd want at least 42's.

Yeah I want the 42's as my next upgrade, but for now how can I recalibrate my fmu? Do they make a specific kit for the 30lb injectors?

Thanks for the input guys!!

[BluntEffect]

You can run Autolite 103's gapped tight down around .030-032 with the GT40's. They are a little bit colder range.

Ok, so I went out and bought some 103's. When I went to put them in they wouldn't go all the way in. I realized the threads on the plugs go farther up the plug than on the autolite 764's (the ones I'm running) Also on the 103's, the area between the threads and the place for the wrench is thicker/fatter. This won't clear the head... Do you know anything about this? I have the heads with 3 bars on the front if that makes a difference...

Thanks again

[Fox Family]

Honestly anything you do without a wideband a/f gauge or getting on a dyno with an a/f gauge is just guessing.
If it's pinging it either has too much timing,not enough fuel or even too hot of a plug. If you've heard it ping already that's pretty bad. Doesn't take much of that to lead to a blown head gasket or worse on a s/c car.

I really don't feel 30's are enough without an FMU. It wont take long of 5-6 psi and you'll be ready to move up to 8rib stuff and 10 or so psi anyways,lol. I'd want at least 42's.

I'd rather run timing at 10-12 initial and then have a box to pull around 1-1 1/4 degrees per lb of boost. That way you have more timing down low to make it feel better but it still pulls enough out up top.



Dude knows his stuff!:thumbsup1::yes1:

I couldn't have the job I have without knowing a lot about cars in general, and I think I know quite a bit about Mustangs in particular, albeit mostly stock/factory stuff...but every time I read one of your posts on this performance stuff, I feel like I just went to school!:lol1:

Sorry for the threadjack...;)

You may continue.

[NC STANG GUY]

Dude knows his stuff!:thumbsup1::yes1:

I couldn't have the job I have without knowing a lot about cars in general, and I think I know quite a bit about Mustangs in particular, albeit mostly stock/factory stuff...but every time I read one of your posts on this performance stuff, I feel like I just went to school!:lol1:

Sorry for the threadjack...;)

You may continue.

Thanks for the kind words. I'm still learning about things everyday but it's not my first trip around the block with the mustang stuff :)

[Rdrunnr]

I am pretty sure those heads run Autolite 25's stock and 23's would be two ranges colder.

What are your plugs gapped at now? You should gap them around .25 - .30 with the blower. I think you metioned you are running a stock ignition with no MSD? Definitely gap them on the lower side then.


You should look to add a nice 255 inline pump to go along with the 255 intank. That and some 42's and you'd be in good shape.

They do make different size disks for the FMU that will calibrate it for any size injector. You just open the top and swap out the disk. The larger the injector, the smaller the hole in the disk. FMU's are just bandaids though.

I don't think you mentioned what gas you are running, but I am assuming you are running 93-94?

I've never been a fan of the spout out method. Overall the cars don't run good like that. I would put an MSD high on your list...not only for better spark but for the ability to pull timing with boost. Then you could set your base at 14 and pull out timing based on boost.

[ProchargedFOX]

25 degrees base timing is more then likely the culprit. The stock ecu advances it up to 26 degrees. Lower that and get a QuarterHorse so you can get a proper tune on the thing. You can change the spark vs rpm tables in there so no BTM is needed. Just a competent tuner.

Oh and get some bigger injectors and throw the FMU in the trash. Even with it and 45psi at the rail with no vac you would still be well maxed out for the 30s.

[razzys wagon]

25 degrees base timing is more then likely the culprit. The stock ecu advances it up to 26 degrees. Lower that and get a QuarterHorse so you can get a proper tune on the thing. You can change the spark vs rpm tables in there so no BTM is needed. Just a competent tuner.

Oh and get some bigger injectors and throw the FMU in the trash. Even with it and 45psi at the rail with no vac you would still be well maxed out for the 30s.

what he said, spout out and 10-12(12 max) (and put the spout back in)because of the advance in the ecu, i have seen them vary between 24-26* with the tweecer. ditch the fmu for sure, best bet would be to search for a used mega squirt 2 with a eec 4 adapter board and plug it up and ditch the MAF all together and hit the dyno.with at least 42's..:bat:... if your staying with the stock fuel system maybe look for some 50 or 55's to sorta cushion your lack of volume delivery.:thumbsup1:

[Silver Sleeper]

42 pounders, autolite 23's gapped to .030, 39 psi FP, 10 degrees timing spout out and a good fuel pump..throw the FMU in the trash and get a tune...stop guessing on your tune..you are going to end up creating alot bigger problems than you already have..:patriot: