yes...you dont' want to run racegas through a catalytic converter. The lead builds up on the honeycombs and clogs it up, which builds up head and backpressure that accellerates the cat melting down. all bad.

 

Pump gas and cats certainly do apply to most persons here, who drive their cars daily and do not have the luxury of being able to drive day-to-day burning race fuel at $9+/gal. This being the case, how the car performs in a `real world` situation (e.g. 93 oct) is better for comparing apples to apples IMO.

 

lol man, have you just started learning about cars? For his mods, his time is awesome. If I was going to get the best time out of my evo, I would spend the money to put in c16. Why in the world would you spend more money on more mods to get the same time if you can do it on racegas? Stop hating.......

 

Awesome times with mods!! Hope I can get similiar ones with my utec. It has a lot of the same features the AEM.

 

the car runs great on pump 93 gas too. I went 12.7 @107.7 on my first time to the track with the ems a week after I got it at 18psi. Im confident that within a few weeks of fine tuning on pumpgas i can go 12.2 @ 109 on pumpgas with no modification changes. Where you got that I run racegas everyday on the street I don't know. I don't run racegas anywhere but the racetrack. 116 is $7.25 a gallon here at Island Dragway in NJ.

you guys are missing the point here and starting arguements over nothing
Noone's comparing my apple to anyone else's apple. I posted this thread just to put an update on how my EMS experience was going. I didn't post it to say anything else.

I go to the racetrack to put down good #'s not to compare my streetcar to anyone elses streetcar as they drive it under your rules as for what is "streetable" and what's not.

Most of my DSM customers do not run a cat on the street. The cat is a non issue, as I belive most evo owners care more about performance per their $ spent, and are willing to change the testpipe out for inspection once a year. go put up a poll and see how many evo owners are tunning a $40 testpipe vs a $150 high flow cat and how fast each car is going. I bet your going to find out high flow cats are not as popular as you think with the people who's #1 prority is street or track performance.

In conclusion, if your going to get in my grill about racegas, cats, BS ect and try to twist my intentions around...jsut don't read my theads if they annoy you that much

 

Hey there,

Just realized my problem... you are V1.11 not V1.03 Updated my programe on the desktop so I can view your files now.

Is the new file a race gas map or pump gas map?

Thanks,

Keith

 

that file is the racegas map that was on the 12.0 113 pass, the log file is there too from that run.

 

Congrats. Those are very impressive results with your level of mods.

l8r)

 

That's good data you got for our stock FMIC's. What were ambient air temps when you took those readings?

 

55* F ambient temp, overcast day. high humity, as it rained prevous night. 10mph wind at most. I was seeing between 70-75* temps with the engine running at idle.
air filter is where the factory FMIC water squirter bottle was. Intake temp sensor is just after the ic in the lower stock ic pipe's first metal bend.

I attribute the 20* differance at idle from ambient to basic heat from the turbo oil and water and minor heat gain from the pipes inside the engine bay.

by the end of the track I was seeing about 95-100* pretty consistently at 22psi of boost. on the 18psi runs It would get up to 90-95

 

Actually I went back and checked out all my logs from track runs...and the intake temp right before going wot in first (basicly while the tree is coming down) was more between 60 and 65*F so I have to restate that the stock Ic was giving me about a 30* temp rise going down the track.

Im going to test out an aftermarket FMIC this weekend since my cams won't be installed till wed of next week. I have a new Spearco Bolt In fmic core, as well as the Vspec greddy core. Cant' decide which to do first.

<EDIT>

Here are the logs that I have for dragstrip runs
Start Temp | End temp | Change in Temp | Boost Pressure (average)
73* | 96* |23* |17psi
76* |100*|24* |18psi
57* | 77* |20* |17psi
57* |82* |25* |17psi
60* |93* |33* |20psi
62* |95* |33* |20psi
64* |100*|36* |21psi

The first two were from the "pumpgas" day at Island
Last 5 were from last weekend...the 5 runs on the first page of this thread.
note: the temps seem to rise at a faster rate on the higher boost runs and settle at close to the end temp by the begining of 4th gear.

 

Hey there once more! I just looked at that log file and have a question....

Does your boost guage read right along with your AEM boost reading? For me the AEM consistantly reads about 2 psi less than my boost gauge, and my boost gauge is consistant with the built in boost gauges from at least two AWD dyno's (one dynapack and one Dyno Dynamics) so I am pretty sure my boost gauge is right on the money and my AEM reads boost low.

Is that what you are seeing as well?

Thanks,

Keith

 

my autometer gauge reads about what the AEM says within 1psi. Id trust the AEM over a mechanical $50 gauge any day of the week.

 

wow really helpful info, thanks!

 

If I didn't think my boost guage was dead nuts on, and then have it confirmed with two other gauges on dyno's I would agree with out..... could be something to do with the sensor I am using. I am using the AEM 5 bar sensor, what one are you using?

Keith