The mail in flashes are milder - safer - and very conservative - but generally good for at least 20 whp gains on stock evos - MORE with the new boost controller flash version.

A custom tune gets you verification, peace of mind and usually about 10 more whp.

 

What about people--like myself--who already use 93 oct? Thanks.

 

Al, Thanks for this flow of information.

When you say "peace of mind" what do you mean? Do you mean the peace of mind of knowing that the mail-in reflash, in iteself, is not causing problems (such as knocking)?

 

Obviously with 93 octane I can make even more power

Generally on a stoc car I make more boost - hold it longer - smooth out the timing and slightly lean out the a/f - nothing very radical

 

Do you lean out the a/f only at the "top" (i.e., where it is set rich from the factory) on in the "middle" as well (i.e., where you say evo's fed with 91 oct. are already prone to knock)?

 

Do a search here for some of my so called "case study" threads on a stock evo - it shows the before and after a/f

 

Dosent the UK get the "modded" versions. I mean the FQ series, which bump up the horsepower, have to have some ecu adjustment, right? I really dont know the answer. But I know that they use the same motor we do, and are running more hp with a warranty. So I think the motor can handle it.

 

Al,

Thanks again for all the answers....you (and the other responders) have dwendled my confusion down close to nothing (which is saying a lot).

I just saw your new post regarding the "boost controlling flash." How would the addition of that feature bear on these issues. Should I choose not to add the BCF feature if I am concerned about motor life?

Thanks (and I do believe this is my last question! sorry for all the questions!)

 

And don't forget about the few Buschur edition Evo's that the one mitsu dealer is selling. Well above stock hp; 330 or something like that. Those come with a warranty also. Just a thought.

 

As a recent arrival from the UK who's just bought an Evo VIII and sent off the ECU (yesterday) for dynoflash with boost control I have often wondered what the FQ mods do to the boost taper. I know peak boost is increased slightly but do these FQ cars also maintain boost up to higher rpm? I have searched extensively but can't find the answer. One thing I do know which seems relevant here is that Xtreme automobiles (formerly Ralliart UK) who perform the FQ mods advise switching to ARP conrod bolts when running increased boost presumably since they've seen conrod failure with the factory bolts.
Any insight would be appreciated.

05 Evo VIII

Stock (till tomorrow)

Indianapolis

 

guys ever though, it would be real hard to pass california emission test (european standard) if your car makes more power coming from factory?

not only that would require more R & D money (emission as well as tranny, mounts, bushings, frame design all has to be upgraded to be reliable) but it'll take more parts to have that worked.

it's still fairely good as it is. This is market research that goes into intiation.

I'm sure if you make 400 whp awd, you have to up the market that it'll sell at, and when that happens, the price goes up.

that's what happened with the FQ-400. It's got warranty, but it costs 40,000 for a mid size sedan.



that and not everyone wants a fast car. Some people, most people want something cheap and comfortable, or at least comfort.

The performance market is a very small segment vs the "soccer mom" market.

 

Yea, but I want a supercar with a "soccer mom" setting....you know...tarmac, gravel, snow, soccer mom...

ha

 

What happened?

Sometimes gas station tanks do get filled up with the wrong octane. I wouldn't want to risk my engine blowing up if some stupid truck gas station owner said "go ahead and dump the 87 in the 91 tank". (Which recently happened very locally to here).

 

Here is the thread - https://www.evolutionm.net/forums/sh...6&page=4&pp=15

 

Safety first, lose your purse...