sixshooter

iTrader: (12)

There was still turbine glow after cool down 1/2 lap, returning to garage, and removing safety gear. Turbo blanket definitely works. So does Resbond and Inconel. Crappy cell phone pics were all I could take at the time.









I let the car idle for a loooonnnng time after each session to cool down.

triple88a

iTrader: (2)

Thick steel takes a long time to cool. Measure what the temp of it is while its hot right after the lap and move on.

miata2fast

iTrader: (2)

That is hot. I assume the dipstick has not melted?

thenuge26

iTrader: (2)

I'm not saying it has anything to do with the blanket but... I'm pretty the track gurus are against them.

GeneSplicer

iTrader: (14)

You see them on pro-level cars, so not sure why they're frowned upon? I've got one, but before TSE stud kit, had to keep removing it to get to bolts - which got old over time. I'll be using it *when* my track build is done.

Seeing it glow like that Steve, define Looooong idle cool down... like 10 minutes? Makes he think of adding K-thermocouple to monitor turbine housing temps... my impatient *** would probably turn it off too soon and cook the oil.

Ryan_G

iTrader: (8)

I really think it is because your timing is too retarded. Always trying to play it safe but too safe is not good either.

m2cupcar

iTrader: (5)

I'd be willing to bet that the long run coming out of the infield, around the high bank and back in has a lot to do with that heat. That is a loooong run in boost. What's your front camber/toe?

sixshooter

iTrader: (12)

That's why I'm not convinced there is any problem having one. I can't imagine having that much unrestrained radiant heat.

It was definitely 10 minutes plus. I was in no hurry to shut it off.

At 10psi I was getting AFRs of 10.7-10.9, which I thought was reasonable considering the heat It may need some more advance to get it all burned before exiting the cylinder.
I just don't know who has a well developed spark map with a stock '94-'96 bottom end. You never know if the guy you are copying is as lost as Hustler. Anyone you can think of in particular?

Ryan_G

iTrader: (8)

https://www.miataturbo.net/megasquir...z-18648/page4/

Ben from DIY autotune has a dynotuned spark table for a stock NA bottom end. Post #80. If it seems a little aggressive for you take 2 degrees out and you should be fine. I run the boost part of this table as my spark advance table with no problem and a more aggressive table in vacuum that I took from Loren and modified just a little.

18psi

iTrader: (76)

Hustler is one of the few here that always tunes on a load bearing dyno and uses det cans.

Just sayin.

I used to run my fuel in the 10's and super conservative timing a long time ago. Kept warping flanges and glowing like you. That got old real fast.

sixshooter

iTrader: (12)

I just like giving him a hard time.

Yeah, you also had the benefit of being able to use e85, iirc. That change must solve a lot of problems. Except for fuel consumption. We don't have access to that here so it's not an option.

Ryan, I remember that spark table from a long time ago, but hadn't revisited any spark info since I started turning the pressure up. I'll see if I can optimize things here in the next two days. I need to pull out the det cans.

18psi

iTrader: (76)

True but I'm talking about before I switched to e85. Like you I was all about keeping it as absolutely safe as possible. Then realized that you can break things by being too safe. That was a real eye opener lol

sixshooter

iTrader: (12)

I reread the thread and didn't see anyone running much more timing than me in the 156-183kpa range. Anyone else got a well developed map for a stock '94-97 engine.

shuiend

iTrader: (24)

I think this is my old spark map of when Jerry at DIYAutoTune tuned my car in 2008. It was a bone stock 94 bottom end with a begi kit and a sr20 t25. I was getting spark blow out on my stock coils around 10psi. The dyne below were my final numbers at 9.5psi

sixshooter

iTrader: (12)

I'm running a lot more than that in 183kpa and at 156kpa, and this is for a track car.

Braineack

iTrader: (62)

this is what i run:

(the top table)

sixshooter

iTrader: (12)

Yours is more conservative than mine in the ~183kpa range.

18psi

iTrader: (76)

I dunno what to say then. Too much fuel?
I've never seen people's hotsides still glowing after idling for 10+ minutes after a cooldown lap like that.

sixshooter

iTrader: (12)

The picture wasn't 10 minutes later, but i was letting the car idle in the garage for 10+ minutes after coming in. The actual pic was after slowing for the last half lap, and then removing my helmet and fire gear and unbuckling from the harnesses. I had run about 15 minutes hard on the track at ~90 degrees ambient. This track involves repeatedly running from 4k rpm in 2nd gear up to 6500 rpm in 5th (130mph), so I know it is building some heat.

I'm cautious about running higher than 11.0 AFRs at 10psi on the 2870 on the track. Detonation is a scary prospect and the heat soak is real after several laps.

curly

iTrader: (25)

I say your turbo needs air. Ok ok pro guys use blankets, but I don't and my turbo never glows after a proper cool down lap. I also leave the fans on for 5-15 minutes after pulling into the pits.

My downpipe also wasn't fabricated by a 12 year old.