Faeflora

iTrader: (2)

That means you can run around 12psi safely before the rods in your engine bend. That's with engine management. Skip this forum conversation and just call up BEGI and talk with them.

You can run an ebay intercooler no problem but you will have to get your own couplers, clamps, proper pipes etc. That might be intimidating if it's your "first time".

Call begi.

Stephanie Turner

Hey there! How is the smurf doing? Guess the boost bug bit, huh. Glad to see the very first 1.6L BEGI-S is still going strong!

You can run 12 psi on this turbo if you add larger injectors and engine management. The best bang for the buck is the MS PNP. I would also add an intercooler at that boost level too. You can do things in stages, but I would probably do the MS first.
Hope that helps,
Stephanie

cburgess72

I knew it was the 1st for the 1.6, was there a 1.8 Begi-S before the Smurf?

Mikeymx5

iTrader: (2)

Thats what im thinking, I can do 14-15psi I dont because its a daily driver but the t2554 cant do much damage with a good tune and a great intercooler.

the 2560 on the other hand may be able to do a better job at shredding internals.

But then again Im the guy who is still using a stock clutch at 11psi so I dont seem to be the norm.

cburgess72

Just now noticed your edit Fult Tilt Bogie, will put the Bipes to 10 in the morning.
My wide band (AEM) reads about 14 when I am on the throttle, so far so good i guess.

FYI-I just got 1.8 rotors and an 1,8 open diff for $250 for all of it, so i guess tha's what i am doing next.

BUT- given my current setup (stock exhaust,5 psi, no intercooler yet) would i have more fun getting 3 inch exhaust, or megasquirt pnp next? I am building slow, learning as i go. Eventually I will add intercooler and up the boost.

Thank for the input.

SKMetalworks

iTrader: (7)

Is this WOT @ full boost? Ive never used an FPR but i would think 14/1 is way to lean. In boost im at 11.5/1





Get a Megasquirt

cburgess72

I will run it tomorrow and get more accurate numbers to post.

I am ordering a mspnp right now.

But now for the dumb question, so if i'm lean with the current setup, to correct the situation, adjust the bipes for more timing retard, but what else could be done to get to 11/1 at full boost.

Thanks in advance.

hustler

iTrader: (6)

20 g's.

sixshooter

iTrader: (12)

Bipes is for timing and the FPR is for fuel/air ratio (AFR). The 14 indicates 14 units of air per unit of fuel so a reading of 11 on your gauge indicates less air per unit of fuel, or a richer condition than a 14.

Are you familiar with a device called an O2 clamp? I'm going to take a stab that you maybe haven't (but the MS will solve the problem, too).

Have you read the FAQ in the stickies about how these things work and how NOT to blow up your engine? The MSPNP is not a 'plug in and forget' arrangement and will require significant effort to understand and operate initially. The PNP designation really only alludes to the fact that you don't need to solder and assemble it yourself. You will need to understand both what your engine requires and how to achieve that requirement. I am concerned for you that you did not realize that 14 to 1 AFRs in boost were a significant danger and that you asked about the bipes as a means to correct the problem.

cburgess72

I bought it used, hope it is working correctly, the led light comes on, i just copied off the testing procedure to check it out.
And thanks for your concern, you are right, this all new to me, so I am taking it slow, and i am reading to try and get it tuned correct.
The MSPNP is on the way, but i am determined to get a safe tune with what i have, in hopes it helps understand a little more before working with the MSPNP.

turotufas

iTrader: (7)

GEt the MAf delete. And a 3" bang bang exhaust.

cburgess72

My new wide band show 14/1 at lower rpm's, but when i am on the throttle in boost, it read 12/1,

triple88a

iTrader: (2)

12 or under is good but if u can get about 11.5 you should be golden.

When you are cruising along and not stepping on it and you're running under that 0 on the vac/boost gauge, 14-15 a/f is normal, when you get closer to the 0 you want ur stuff to start going towards the 13-12, when you go over it into boost you want about 11.5a/f

Savington

iTrader: (31)

12:1 is lean. 12.5:1 is very lean. 12.9:1 is EXTREMELY lean. Have you considered hiring a tuner to ensure you don't damage your engine?

triple88a

iTrader: (2)

actually 12:1 is perfect however due to the heat caused by the turbo thats why people go lower

12:1 is perfect for natural aspiration / under 0 psi numbers since they dont have the added heat from the turbo.

Savington

iTrader: (31)

Spec Miatas make the most power in the high 12s, low 13s IIRC. I've found that turbo cars make the most power at ~11.5:1. I've also found that they are very, very prone to detonation when AFRs go any leaner than 12.0:1.

gospeed81

iTrader: (51)

1. Install BEGi kit
2. Enjoy Boost
3. Want moar
4. Get tired of blind tuning
5. Get MEGASQUIRT
6. ?????
7. Profit

Stephanie Turner

We have tuned plenty of cars at 12:1, that make great power, and have no detonation. For a street car, 12:1 is perfect, as long as there is no detonation. There are many other factors involved, but we usually make the most power at 12.5:1, here at (almost) sea level.
Stephanie

Savington

iTrader: (31)

To each their own. I set a GT2554R up on a stock 1.8, tuned it at 12.0, and then richened it to 11.6 and saw another 4whp. I believe Ben saw the same thing on his old GReddy kit (max power in the mid 11s).