Just turboed 91 miata, curious about BIPES ACU
 

Here's my set-up:
-91 1.6L Mazda Miata
-DSM 14B Mitsubishi Turbo (WG set at 7psi)
-No intercooler
-DSM diverter valve reciculated to inlet pipe
-97 1.8L Miata 265cc Brown top injectors
-Vortech 10:1 FMU
-FM o2 signal modifier

I just finished installing everything a week ago and the car seems to be running just fine. Though I haven't adjusted timing or anything. I haven't been driving the car around because of fear that I may blow my motor with out any tuning or adjusting the timing... I'm curios about purchasing a Bipes ACU and was wondering what would be the best settings for my set-up?

There are several writeups on bipes acu etc in the diy faq.

I would retard the timing 4* just to be safe. I wouldn't leave the timing at 10 or 12 without any sort of tuning band aids. Greddy tells you to retard 4* with the stock kit do you have a wide-band gauge? boost gauge? i would recommend those things with a piggy back unit

i do have a boost gauge, no wide-band though. I'm not sure if I want to spend the money on a piggy-back unit. It's kinda a budget project.. I was planning on retarding the timing to 8*, but the Bipes ACU just caught my attention because it can retard my timing up to 20* depending on how much boost to completely avoid detonation and yet be able to keep my stock timing in order to not lose low-end power.

You don't tune the Bipes depending on boost necessarily.

You live in VA, so you have 93octane, which should let you push up to 7psi non-intercooled with a Bipes. I'd start at 12* base timing and pull 4* starting at 3000rpm, with an extra degree for every 30*F. If you get knock, either pull your base timing back to 11* or 10*, or increase your total timing pull to 6*.

In any case, you shouldn't need to run less than 6* advanced at any time with 93octane... it shouldn't knock, especially with the 02clamp.

Air filter placement can also be a big deal non-intercooled... getting as cool of an intake charge as you can is basically free power and knock prevention.




You really need an EGT gauge to tune a Bipes effectively.

When I used the bipes with a greddy I used the following settings (92 Octane):
static timing 14*
full retard 8*
1* /20C
2500-3800 ( I hit 7psi ~3700)
LEDs set to display 2* of timing retard

I also had the 1.8 injectors and the FMU that came with the kit. It made 150hp like this.

okay thank you very much for your help

Sorry I posted in the wrong thread. Lol

LOL bro wut? This is a 13 year old thread. I was probably driving my moms minivan home from swim practice with her in the passenger seat since all I had was a learners permit when this was typed. There was no speedyefi then. And speedy is WORLDS better than Bipes ACU or Voodoo box. No comparison.