What high flow cat was used on this car that you say is so restrictive? (diameter and brand please)

Now that I am looking at the pictures, it looks like it was some "high flow cat" that the shop sells and goober welded it on. I only deal with one brand of high flow catalytic converters, and with those I have seen zero performance loss between having the high flow cat on, and running a straight pipe

 

It is an RRE high flow cat. It is built by RRE in house. They use a core and then weld falanges to the core. I have seen two of these HFCs and both of them had pinhole leaks. The core looks the same to the core that the UR test pipe uses. I had a UR HFC and saw 13 hp and 7 ftlb of gian when I switched to a tp.

 

You never hear bad things about his tunes, because we cannot post band things on SoCal Evo. WE GET BANNED if we do. I posted about his tunes here.

https://www.evolutionm.net/forums/sh...ooney+tune+fix

I live in Long Beach.

 

What is the Diameter of UR's cat? and are we talking about Unorthodox Racing? I am not a fan of UR's products, and when I questioned them at SEMA about a product of theirs I had bad experience with a few years ago, it was like I had slapped their children. They immediately turned into italian mobsters "Who told you that?!?!?" "They obviously don't know what they're talking about"

They immediately started to crowd around me like they were trying to intimidate me and started to bash internet forums (the problem I had was from my personal testing)

I only use Random Flow Technologies catalytic converters. I am currently using their 3" high flow cat for the Evo/3000GT and LOVE it.

 

That's true what NJ says about banning on socalevo. If you give your true opinion SPECIALLY the negative ones, they warn you. There's always a fanboy attitude, if someone writes negative things about a tuner or shop.

 

Been there done that. unless we can post about bad things shops/ tuners will not change their ways.

 

I have an Ultimate Racing 3 inch cat. A lot of people use it. It is neither too cheap or too expensive. Switching from the UR to a test pipe made the car a whole different animal.

 

I agree, just do not tell them who fixed the tune. Ask them to PM you if they want to know. I have been accused by the admins of promoting my services even though I do this for free. If my name is mentioned, then they will come after me

 

I've read the first post but haven't read the replies. Keep that in mind.

I'm always amused and even more so when I have beer in hand (like now) reading posts like this. Shops making money tuning cars like I did during my first year of tuning my DSM. Makes me feel like an expert that should be charging mad money for tunes.

Timing breaks motors. No ifs ands or butts about it. You force timing down a motor and disable the safties and it'll break no matter how strong it is. If a motor takes more timing it just prooves to me that is inefficient at burning the mixture. Think original hemi V8 engine.

Running "lean" is the safest way to make good honest power. Mid 12's is a great goal to shoot for. I'll tune for 12 flat for street cars to compensate for differeing specific gravities of fuel. IE: sunoco runs a little leaner than Exxon both at 93 octane on the right coast. Tune the timing table to suit. Evo IX's like 4-5 degrees at peak torque and 12-14 at 7000-7500rpm's. Make a nice taper gets you 80% there. Evo 8's like 4-6 degrees at peak torque and 14-16 degrees at 7000-7500rpm's. Again make a nice taper. More boost means less timing and also means making more of each burn. Think dynamic compression and less wasted power and more burn ATDC for more torque.

 

Ahh, Ultimate Racing, not Unorthodox racing.. I've never dealt with anything from Ultimate... but if you are losing that much power, I'd question the design.

Dan, even with a beer in hand, that as a good post. Cheers!

 

Dan, this is a question and not a challenge, so please don't take it that way...

Have you tuned a Evo 8 or 9 on 91 octane, at 12:1 AFR flat, 4* at peak torque and 12* at 7000? What was the boost at peak torque and at 7000? What where the max knock counts?

I find it interesting you say timing breaks motors but that seems like aggressive timing to me, espically at 12 AFR. I usually run about 2-3* less at 7k, on 91 octane, with about 19psi at 7k, 11:1 AFR or so. Any leaner and I usually need to reduce timing and/or boost to quelch knock.

 

I've tuned on your 91 octane, its pure ****. I'd be dumping in toulene or mixing in some 100 unleaded with every tank if I lived in cali. Yes that is aggressive timing for *your* pump gas. I keep forgetting you are in the peoples republic of California. You can still massage some timing into the car. Your probably looking at 3-5 degrees at peak torque and 10-12 up top in an evo 8. Similar timing on an evo 9 at peak torque but closer to 10 degrees up top. Every combo is different and that is just a ROUGH baseline. Even on our good gas if a car won't take the timing it won't and you can't force it so relax your goals and work with what the car will do instead of forcing it to do it.

How good is our gas? I can run 24psi spike tapering to 16psi in an evo 9. Stock cat with catback and MBC for boost control. 310hp/315tq on a mustang dyno no knock. 3 counts of knock cost me 10whp which is an interesting note.

Reducing boost and/or timing are both acceptable ways to get rid of knock. Adding fuel is not. Try running as much boost as possible while staying in the turbos efficiency range. Mind you its colder here now but yesterday I was running 25psi on 93 octane pump gas in my DSM. I was moving 380 load and no knock. The car was moving around so much I had to tune in 4th gear which tops out at 135mph. That car hates timing but loves boost (no matter what head/cam/valve setup I have). I ran 3 degrees at peak torque and 11 degrees at 7000rpms no knock.

So while their are general rules of thumb just work with the car and what it will do. Your a smart person you know what your doing.

 

heheh...

AZ 91oct makes me knock like vac salesman at 4* peak torque. I think if I ever ran 5* my ECU would count more knocks than it has fingers.

It's wonderful, let me tell you. I recently spoke with ECUTEK of America honcho Ben (of Canada, no less) He called the gas we have in arizona Fruit Juice. He claims the 93 they can get in canada is almost race gas to us.

 

These two statements are what every tuner must follow. I hate what Pro SoCal tuners are doing. The tuner who tuned this car really believes that there is a pre-determined timing profile that ALL evos must follow. And he will FORCE that timing on every Evo no matter what. He said so in an e-mail to azul_gsr. He also said the same thing to another SoCal Evo member when they questioned his block tuning technique.

I am beyond frustrated with this guy. I am downright angry that he charges $500 for such crappy tunes. I would not flash his tune on my car even if you paid me $500.

 

bada-bing