Official OpenFlash Tablet FA20 Tuning Tech Discussion Thread

[OmarYasin]

Does anyone believe 250hp can be accomplished with a NA tune and some engine upgrade? Like 13:5 compression? And is their any real hp gains from a aftermarket intake once its been tuned and maf scaling adjusted?

[Celadrielas]

Originally Posted by OmarYasin

Does anyone believe 250hp can be accomplished with a NA tune and some engine upgrade? Like 13:5 compression? And is their any real hp gains from a aftermarket intake once its been tuned and maf scaling adjusted?

@nelsmar tunes Ecutek here in my local area and I want to say he helped an NA hit 250 engine, 230whp ish.

I think what you're going to be looking at, however, is more than just compression changes. I am not certain the specs of the NA vehicle that was tuned, but I would imagine you're getting into the realm of built internals, and compression changes. Also, 13.5:1 leaves very little clearance so high reving could float valves and that would cause failure of the motor.

[phrosty]

Originally Posted by OmarYasin

is their any real hp gains from a aftermarket intake once its been tuned and maf scaling adjusted?

It's difficult to tell exactly how effective intakes are when all the dyno results the manufacturers post compare a tuned car to an untuned car.

At least my Perrin intake sounds mean as hell .

[Celadrielas]

Originally Posted by OmarYasin

is their any real hp gains from a aftermarket intake once its been tuned and maf scaling adjusted?

Originally Posted by phrosty

It's difficult to tell exactly how effective intakes are when all the dyno results the manufacturers post compare a tuned car to an untuned car.

At least my Perrin intake sounds mean as hell .

I actually missed this part of the question. Like Phrosty said, It's *REALLY* hard to tell since it varies Mfg to mfg, dyno to dyno, tuned or untuned, ect. But there is one thing confirmed... Stock box is restrictive so replacing it is a must for the extraction of the most power. @steve99 has something about this on one of his various links and may be able to shed some more light on it.

I am willing to bet each has different pros and cons.

[tracerit]

Originally Posted by Celadrielas

E85 can be ran on a Stage 2 EL tune for stock cars safely if using the OTS stage 2 tunes. Please make sure your tune is solid and you run it for about 10 miles under 3500 rpm to allow for closed loop fuel mapping to complete. Once this is completed, you should be able to run WOT and do 3rd, 4th, or 5th gear pulls as you see fit.
If changing your tune, then let the engine remap / relearn the new composition of E% and then go from there. (It was recommended every tank you let it relearn before WOT)

Happy driving.

Ah yeah I'm currently on the stage 2 el e85 tune and have been using it for the last 40 miles. My issue is that I'm still getting the 4k noise with it. With reports that any uel stage 2 tune will get rid of it, I want to try it out but with the stock El header still on. So my question is more will running an uel header tune be dangerous while equipped with an el header.?

[Celadrielas]

Originally Posted by tracerit

Ah yeah I'm currently on the stage 2 el e85 tune and have been using it for the last 40 miles. My issue is that I'm still getting the 4k noise with it. With reports that any uel stage 2 tune will get rid of it, I want to try it out but with the stock El header still on. So my question is more will running an uel header tune be dangerous while equipped with an el header.?

I gotcha. I actually had the same complaint and found it is likely sound from adjusted vvt tables. This engine lets off a lot of resonated sound at that rpm range once you retune it. The factory vvt map is a fair bit quieter. This is a common comment and there are many threads on it I was able to find but I don't have them available 'cause I am at work and not on my home PC. You should definitely log fbck and flkc and see if there are signs of knock just to be safe.

For me it's an ~500rpm band from 3500 to 4000 ish. Hope the information is helpful though, I embraced mine and don't have a solid fix.

[OmarYasin]

Originally Posted by Celadrielas

I actually missed this part of the question. Like Phrosty said, It's *REALLY* hard to tell since it varies Mfg to mfg, dyno to dyno, tuned or untuned, ect. But there is one thing confirmed... Stock box is restrictive so replacing it is a must for the extraction of the most power. @steve99 has something about this on one of his various links and may be able to shed some more light on it.

I am willing to bet each has different pros and cons.

So far ive modified the snorkel, put a zeda inlet tube and droped a k&n filter. I just curious as to what i have to do in order to get some extra hp on NA. My friend that owns a fully built sti says its really hard to tune NA and that going boosted hids alot of the flaws of a improper intake or exhaust compared to NA. Like many ppl say boost cures everything but im really considering a NA build vs boost

[Celadrielas]

Originally Posted by OmarYasin

So far ive modified the snorkel, put a zeda inlet tube and droped a k&n filter. I just curious as to what i have to do in order to get some extra hp on NA. My friend that owns a fully built sti says its really hard to tune NA and that going boosted hids alot of the flaws of a improper intake or exhaust compared to NA. Like many ppl say boost cures everything but im really considering a NA build vs boost

Sounds like we are on a similar platform mentality. Let's start with my set up:

Cut snorkle at right bolt (vs left, 2nd bolt), then heated open with a pop 20oz bottle.
AEM Intake
Manzo overpipe
plans for an OFH
OFT tuner

Issues I am seeing in the custom tunes I am working on for my vehicle:
Air flow is too turbulent. Snorkle is designed to smooth airflow so I am losing HP, TQ potential.

No header is causing restriction and too much back pressure in the exhaust. I want to open this up and run 2.5" minimum header to tails.

AEM comes with a sensor that adjusts the MAF map for stock cars (not tuned). This kept me from getting a CEL when stock. Now it's changing my MAF modifications in my OFT tunes. rawr.



***End Goal***

If I could see 230hp / 220tq to the floor, I'd be really happy. This is going to take money, time, effort, and a smidge of luck.

As for turbos / FI... It's true. HP/TQ per dollar it's cheaper



EDIT:: FORGOT TO ADD WAYS FOR EXTRA HP -- Tunes, E85 (Higher % is better), replacing internals of engine, new header, replace exhaust with open piping.

WAYS TO FREE UP HP:: Light weight flywheel, light weight pullies, ect. These don't "give" you power, be rather prevent you from losing power during transfer to the wheels.

remember that open pipe exhausts are loud... possibly not street legal in your area. Also a car with too little weight can become unstable during use of power. so careful with how light you get.

[OmarYasin]

Originally Posted by Celadrielas

Sounds like we are on a similar platform mentality. Let's start with my set up:

Cut snorkle at right bolt (2nd bolt), then heated open with a pop 20oz bottle.
AEM Intake
Manzo overpipe
plans for an OFH
OFT tuner

Issues I am seeing in the custom tunes I am working on for my vehicle:
Air flow is too turbulent. Snorkle is designed to smooth airflow so I am losing HP, TQ potential.

No header is causing restriction and too much back pressure in the exhaust. I want to open this up and run 2.5" minimum header to tails.

AEM comes with a sensor that adjusts the MAF map for stock cars (not tuned). This kept me from getting a CEL when stock. Now it's changing my MAF modifications in my OFT tunes. rawr.



***End Goal***

If I could see 230hp / 220tq to the floor, I'd be really happy. This is going to take money, time, effort, and a smidge of luck.

As for turbos / FI... It's true. HP/TQ per dollar it's cheaper

I pretty much have done all that i can as far as bolt ons.
Ex:
Revwork header
Full invidia exhaust headerback
Im also catless all the way thru so i might have to much airflow but then again idk because of the T or Y pipe and mufflers on the invidia
Due to winter omn o longer on the ethanol juice.
Zeta inlet tube modded snorkel and k&n as far as intake goes. I did not heat the snorkel with a bottle inside it. I just cut it @ shivs recommend length.

[ckim]

Sorry for posting this all over the place, but I'm a bit desperate for help.

I'm having an issue with the OpenFlash tablet.

- I had previously successfully used the OFT to flash the stage 1 tune.
- I purchased the OFH, so I uploaded the stage 2 UEL maps to the OFT.
- I had the OFH installed today.
- When I went to flash my car I received the following messages: "Tuning file mismatching. ECU write denied"; "Tuning file corrupted. Weird."
- When I plugged the OFT into my computer, when I try to read/write to the device I get the following message: "Error in opening the file."

I'm stuck. Please help. I can't delete the device because that requires that I write the stock rom back to my car. But I can't write the stock rom back to my car because I get the above "Tuning file mismatching." message.

HELP!

[steve99]

Originally Posted by OmarYasin

Does anyone believe 250hp can be accomplished with a NA tune and some engine upgrade? Like 13:5 compression? And is their any real hp gains from a aftermarket intake once its been tuned and maf scaling adjusted?

Have a read of the Basic Guide To bolts on Mods link below

you can get about 30 wheel hp NA fairly cheaply

40hp is going to get expensive

50 hp is basicly not obtainable NA with current bolt on mods tune NA go FI it would be cheaper anyway.

Intakes will only get you a couple more hp than a filter and tube NA, intakes are expensive hp and will require custom maf scale and tune to get best results.

if you rearly want an intake the grimspeed one has maf scaling very close to stock.

[Celadrielas]

Originally Posted by ckim

Sorry for posting this all over the place, but I'm a bit desperate for help.

I'm having an issue with the OpenFlash tablet.

- I had previously successfully used the OFT to flash the stage 1 tune.
- I purchased the OFH, so I uploaded the stage 2 UEL maps to the OFT.
- I had the OFH installed today.
- When I went to flash my car I received the following messages: "Tuning file mismatching. ECU write denied"; "Tuning file corrupted. Weird."
- When I plugged the OFT into my computer, when I try to read/write to the device I get the following message: "Error in opening the file."

I'm stuck. Please help. I can't delete the device because that requires that I write the stock rom back to my car. But I can't write the stock rom back to my car because I get the above "Tuning file mismatching." message.

HELP!

Email Shiv@openflashtablet.com

Let him look it over and he would be able to help. I have no knowledge.

[ckim]

Originally Posted by Celadrielas

Email Shiv@openflashtablet.com

Let him look it over and he would be able to help. I have no knowledge.

Thanks! I'll them a call tomorrow.

Any problem running the Stage 1 tune in the meantime? I seem to have freed up a good amount of low end punch with the OFH, even without the stage 2 uel tune.

[steve99]

Originally Posted by ckim

Thanks! I'll them a call tomorrow.

Any problem running the Stage 1 tune in the meantime? I seem to have freed up a good amount of low end punch with the OFH, even without the stage 2 uel tune.

will be ok but it will probably throw cel P0420 and your cruise control will stop working, just clear it with oft