Installed a Pyro, what #'s should I get?

[dds78910]

I installed a Pyro in my R/T last night and have never really used one before. What kind of #'s should I expect? I installed it just after #1 cylinder. I went on a short ride last night and it got up to 900 I thought it would run more than that.

[1FastCSX289]

900 is pretty cool. I rarely run over 1400-1500......1600 is about as toasty as I like to see things.

[rx2mazda]

I installed a Pyro in my R/T last night and have never really used one before. What kind of #'s should I expect? I installed it just after #1 cylinder. I went on a short ride last night and it got up to 900 I thought it would run more than that.

You went for a ride?:confused:Can you give us more information? Did you go cruising around or did you go "balls to the wall"? Were you getting 900 under full boost full throttle? Either way, you should be seeing 800-900 under idle - cruising around lazily will get you anywhere from 1100-1400. For tuning purposes you should only be concerned with full throttle, full boost reading. I like to stay around 1400 max under these conditions. Once you start pushing 15-1600 you running pretty lean, maybe faster than when it's @ 1400 but detonation is only a boost spike away. Also depends on how much boost your running and gasoline octane. If I was running C16 I wouldn't mind getting up to 1500. Also, you will only be getting a reading from cyl 1 and you won't have any clue what the others are doing.

[Turbo3Iroc]

These cyl heads can take more temp than an 8 valve head. I've seen 1630 and would have let it go a bit more if I had more gear.

[t3rse]

my 2.4 idles at 1000

[glhs727]

celcius or fahrenheit?

[Mike_Shepard]

Dumb question but how far in the bung should the needle be? I've got mine is and idling for an hour it never goes more than 300 degrees

[dds78910]

I let the car idle but it didnt get to opp. temp:o. There is a 1/2 mile strech of road 1 bolck away from my house. I drove it on that stetch at WOT @ 15psi turned around and did the same thing and it never touched 1000 degrees. I put on a narrow band A/F on yesterday also and it seems to be rich. I'm running a FWD stage2 cal and 20's.

[1FastCSX289]

I let the car idle but it didnt get to opp. temp:o. There is a 1/2 mile strech of road 1 bolck away from my house. I drove it on that stetch at WOT @ 15psi turned around and did the same thing and it never touched 1000 degrees. I put on a narrow band A/F on yesterday also and it seems to be rich. I'm running a FWD stage2 cal and 20's.

What was the A/F ratio? Whats your fuel pressure?

[bansheenut420]

Lotus designed the head/mani combo to run about 1750 or so I have been told. I know they are tough heads though as mine saw 2300+ several times when the fuel pump was unhappy and my boost creep problems were making me run 35psi. :O My probe is mounted about 1" from the outlet of the head on the #1 cyl. 1000 deg at idle is normal on my car. 1500 deg cruise.

[rx2mazda]

These cyl heads can take more temp than an 8 valve head. I've seen 1630 and would have let it go a bit more if I had more gear.

What boost, what gas?


I let the car idle but it didnt get to opp. temp:o. There is a 1/2 mile strech of road 1 bolck away from my house. I drove it on that stetch at WOT @ 15psi turned around and did the same thing and it never touched 1000 degrees. I put on a narrow band A/F on yesterday also and it seems to be rich. I'm running a FWD stage2 cal and 20's.

That's pig rich!!! Your losing a lot of HP running that rich. What's your fuel pressure?


Lotus designed the head/mani combo to run about 1750 or so I have been told. I know they are tough heads though as mine saw 2300+ several times when the fuel pump was unhappy and my boost creep problems were making me run 35psi. :O My probe is mounted about 1" from the outlet of the head on the #1 cyl. 1000 deg at idle is normal on my car. 1500 deg cruise.

I'm sure your non-stock setup saved your a$$ there. Didn't you have to take the head off after that? With a stock block there's no way I'm letting my egts go above 1600, call me chicken :D

[rx2mazda]

celcius or fahrenheit?

If your reading celcius than that's 1652 Fahrenheit, if that's the case then you should be seeing around 500 at idle.

[bansheenut420]

I'm sure your non-stock setup saved your a$$ there. Didn't you have to take the head off after that? With a stock block there's no way I'm letting my egts go above 1600, call me chicken :D

lol Yeah, Venolias FTW! :D Its happened about 5 times too. lol But, yeah it lifted my head when it did that, so I had to pull the head and replace the hg. I know I saw somewhere though that lotus figured about 1750 under load was where it would be, or what it could handle safely.

[rx2mazda]

lol Yeah, Venolias FTW! :D Its happened about 5 times too. lol But, yeah it lifted my head when it did that, so I had to pull the head and replace the hg. I know I saw somewhere though that lotus figured about 1750 under load was where it would be, or what it could handle safely.

Here's the thing with that, I believe that with a stock ecu and stock boost that's fine and the car would run faster than peter rabbit after a giant carrot. But that also may the double edge sword of the design. You notice that whenever boost levels get to 19-20 we start seeing KR no matter what the egt are. Thank god for meth. I wonder at what boost level will a srt4 or hybrid start pulling timing? Have you seen the timing curve on those motors?!

[Turbo3Iroc]

What boost, what gas?


My car went through a lot of changes last year but I think It was around 20-22 psi, stock cal and pump gas + meth. I'm not sure if I was running a mix at the time.

[dds78910]

I dont know what my A/F is since the narow band is on, But when it's floored at 15 psi the A/F is all burried all the way in the green with only 2 or 3 bars showing on the Auto meter A/F. And the egts (F) :D barley go past 900. Cuising at 45mph in 3 gear it will get to 1000, but when I shift into 4th gear it drops to 900 again. I for get what idle is but it's between 600-700.

Am I running too rich, would running rich make it run that cool?

I have a fuel rail, adj. regulator, and fuel guage coming this week so when I get them on I can mess with it more.

[dds78910]

Any other ideas?

[bansheenut420]

Running to rich would make the egt's lower in some instances, in others not. An egt probe is not a real good way to determine A/F. Its a great tool for helping you determine whats going on, once you know the a/f, but its hard to tune with just egt. Your 1652 reading is not far off at all from what I was seeing.
http://i270.photobucket.com/albums/jj95/bansheenut420/Myboostcreepdatalog.jpg

[puppet]

To the OP .... Any pic's of the plugs?

[MopàrBCN]

I installed a Pyro in my R/T last night and have never really used one before. What kind of #'s should I expect? I installed it just after #1 cylinder. I went on a short ride last night and it got up to 900 I thought it would run more than that.


celcius or fahrenheit?

Hi,

I didn't get clear on that either.

If your readings are farenheit:

-I would be interested in knowing where and how exactly did you mount the EGT proble. Also I would be interested to know how you manage fuel/boost etc.

From what I read I would be tempted to say this is way too low for my liking. That said, it all depends where you are measuring your EGTs. If it's half way down the downpipe then I am not surprised. However if you are measuring on the number 4 runner it's a different story.

If it's Celsius I can't say a lot. For a 8v I would feel it's too high.

I agree with the guys saying that EGT should be rather a complimentary tuning tool! (However I wouldn't want to be without it!)

[dds78910]

The gauge is running farenheit. It has a stage 2 FWD Cal and 20's for injetors. and running 15 psi of boost. The probe is in the manifold just after the # 1 cylinder it is only 3 inches away from the head. I had it on cuise a couple days ago and in 4th gear going 47 mph and I was getting 1100 degrees but when I give it gas it will go down to 900.

I was wondering I have also had the issue of bad vibration since last month when I pulled out the chan for the balance shaft chain and I have solid Poly bushings. Could my knock sensor picking up the vibration and pull timing and causing it to run rich at WOT?

[dds78910]

It's been a while ince I have been able to work on my car, so here is what's new. This week I cut off the cat and intalled just a straight piece of 3" tube and installed my wideband. The EGTs seem high since I took off the Cat. Idle is at 800 and Cruising at 45 mph the egt is at 1200 and floored I didnt see it get to 1400. The A/F was 10.0 when I drove the car hard in 2,3,and 4th gear at 17psi. In all gears it was consistantly getting 10.0 a/f. I will get my fuel rail and AFPR on this week so I cant try and mess with my fuel pressure. Is 11.0-12.5 is a good A/F ratio I need to be getting?

[86Shelby]

Your latest numbers are about where my R/T sits as well. Bung is in the #2 runner. I know I'm a little on the rich side. I'd rather lose a little bit of power due to it being rich than screw something up and have the car sit for an extended time while I repair it.

[Turbo3Iroc]

They are about where both of my cars are also. The WOT is low because of the overfueling.