Zoom zoom BoOm x2.

[TurfBurn]

I'd be curious to see what Nick has to say when he hears it.

 

[TurfBurn]

I really wish you had a datalog of the EGTs. That would really help right now.

and contrary to popular belief.. they go DOWN during detonation.

 

[TurfBurn]

Is your car equipped with ABS? Can a tranny with a speedo gear break at the diff and still give a speedo reading?

No.. you'd become a one wheel wonder quickly... and you'd lose your speedo reading.. BUT the roller could in theory drive that other half... and keep the speedo going.. but there would be a lot of noise and the like... and there isn't any.

 

[ddogg777]

Then it looks as if the transmission survived?

 

[TurfBurn]

I didn't hear or see anything in the video that would indicate otherwise... but Brian (first name right??) would know for sure.

 

[Spooled]

and contrary to popular belief.. they go DOWN during detonation.

So you think a head temp probe would probably help here, too? Of course, I guess it's a little late for that.

 

[TurfBurn]

I think people should spend the 500 bucks and buy JandS Safeguard systems (and no I don't sell them...)

 

[igdrasil]

I think people should spend the 500 bucks and buy JandS Safeguard systems (and no I don't sell them...)

Sound good, I think I will do it. This can save your engine specially for people that will use the car for daily driving. I would also recommend water injection.

Detonation can be heard on the exhaust, is not usual to know it because we as drivers are always inside the car and usually try to hear the engine.

I visit dynos all the time, maybe 1-3 times a week and Ive seen blown engines on it, and detonation can be heard like a prrrrr like when is too rich and missfiring, its just a bit different.

We all know that not all 4 cylinders run the same temperature, due to manifold design, chamber, valves, imperfections or injection difference, thats why now complex EMS like the TecIII does manage every cylinder different.

What some people (with common EMS's) do here in PR is run a different heat range plugs on each cylinder depending on how they run. This will at least help reducing detonation or pre-ignition and save their motors.

 

[TurfBurn]

So it sounding like misfire/richness to me is not insane... since I have never heard detonation outside of a car... so that makes me feel less like a dunce!

 

[Kooldino]

So it sounding like misfire/richness to me is not insane... since I have never heard detonation outside of a car... so that makes me feel less like a dunce!

It definitely sounds like a misfire to me, however it does not sound like a RICH misfire. But i'll have to listen to it again to be sure.

 

[TurfBurn]

It definitely sounds like a misfire to me, however it does not sound like a RICH misfire. But i'll have to listen to it again to be sure.

I was generalizing (which I should know better than to do)...

 

[mazdaspeed75]

So were you ever able to watch the datalog? If not, post it up so we can check it out. Definatly ruled out the rev limiter and over rev's with that video, 6-6500 MAX. I'm thinking maybe you didn't have enough timing out. You were puling only 9 degree's up that high, what kind of timing have other MSP's pulled at that boost level.............Focus???

It does seem wierd that #1 is so bad, but the others are pretty clean. Wouldn't all the pistons have a lot of detanation if it were detonating THAT bad? Kinda makes you think the detonation wasn't the only thing. Did that chunk of metal come out of #1? Maybe that caused all the damage to the piston?

-9 dam man i have -13 up top at 11 psi

 

[Bigg Tim]

-9 dam man i have -13 up top at 11 psi

That's why I was asking, it seemed low.

 

[igdrasil]

On pump gas...using the MPI Tunner we should be more conservative with timing, not pulling only whats necesary and be on the edge for power, you never know when you have bad gas.
You only have all advance possible when tunning race gas.

 

[BlkZoomZoom]

You guys think more timing should have been pulled? I thought 9 was alot. I know the rule of thumb had always been -2 for every 50-75hp increase. Of course I this is my first time really playing with a fourbanger.

 

[TurfBurn]

Usually you figure 1 to 1.5 degrees per psi on these motors.

 

[mazdaspeed75]

Usually you figure 1 to 1.5 degrees per psi on these motors.

so i figure iam pulling about right for my setup Plugs looked good as of yesterday . I am running 11 psi and pulling like a beast i turn down the boost slightly to try and get the a/f alitlle lower to 12 or so

 

[BlkZoomZoom]

I guess that would have been a good question to ask like 3weeks ago. lol.

You mean 1-1.5 degrees per psi past the stock boost level? I always thought the timing curve was pretty conservative as it was on the MSP.

 

[mazdaspeed75]

I guess that would have been a good question to ask like 3weeks ago. lol.

well inkow from the get go the timming was a big issue to me i never could get a answer on how much. I figure now that everyone is different on setups and i really think i was detonating when i dynoed and only had like -7 out at 9 psi so we pulled more but i though we had to much out so i turn up the boost every couple of weeks and listen and watched how she ran. 11psi and -13 from about 4500rpms and up seems a good spot for the hot humid weather here and i still make real good power I am not sure if i will redyno now with this happening to you . I really think i am at 230 whp plus I pull so hard thru all gears I almost spin in 3rd .

 

[mazdaspeed75]

I guess that would have been a good question to ask like 3weeks ago. lol.

You mean 1-1.5 degrees per psi past the stock boost level? I always thought the timing curve was pretty conservative as it was on the MSP.

I heard we need to be like 20 degress adavnced under boost and Jdm sam tuned a car and found it to be like 23 24 degrees under boost and he said that was to much so man i not sure I think for me it seems pretty good the white on the grounding strap seems to have stayed th esame so i guess my egt are ok