westcoasttuner

Hi, I have a 93 with stock tt setup running power fc and larger injectors (I have no clue what size, they were on the car when I got it). I recently had the engine rebuilt and street ported. Now on a wideband o2 I am getting around 12:1 at 15 psi and 22 degrees advanced on the leading plugs. I was told by an rx-7 guy that this is going to blow my motor and was wondering if I could get a second opinion? Any help would be greatly appreciated, I am just trying to keep this thing from blowing up on me. Thanks!!

Matt Hey

Yes, that's TOO LEAN! DON'T drive it! Get it tuned! You should be no leaner than 11.5:1 WOT with a good tune and a little richer yet would be safer. Also, your timing should be retarded with a street port!

Trevor

Yep.

And if you're pushing 22 degrees in the 5600-6000 rpm range you're pushing things VERY hard on the timing side too. Some people run upwards of 17 degrees there but 12-13 is more the norm from what I've read on here.

westcoasttuner

I made a few more pulls and saw the gauge mainly at 11.5 when I was pullin hard. I all so saw around 9deg of timing on the trailing side...but around 20 on L...so drifting this weekend would be a bad idea wish I could just crank the fuel up, or turn the boost down easily,,,blah....thaught I was done.