How much boost can a stock evo 8 can handle?
Jan 9, 2008, 11:47 AM
#16
Coz I'm reading off an electronic gauge, 1.53bar is correct.
It currently has BOV and HKS filter running on 98 octane.
Since stock evo is 19psi (1.31bar), I'm just thinking how much boost evo can handle without further mod.
1.53bar seems to be running fine but you reckon I could go abit higher?
It currently has BOV and HKS filter running on 98 octane.
Since stock evo is 19psi (1.31bar), I'm just thinking how much boost evo can handle without further mod.
1.53bar seems to be running fine but you reckon I could go abit higher?
so you have a BOV and a panel filter as your first mods.
VTA BOVs ftl
also what octane are you really running? 98RON?
you must be in Europe, or your running race gas. i'm going to go ahead and assume your in Europe.
Jan 9, 2008, 02:02 PM
#23
Evolved Member
iTrader: (5)
Join Date: May 2004
Location: SL,UT
Posts: 3,601
Likes: 0
Received 0 Likes
on
0 Posts
Is your electronic gauge setup as a boost controller or what?
I was told (meaning don't quote me on this at all) that 23 psi on 100 octane race gas was fine. My car had a K&N drop-in, Injen TBE and a tune for 21 psi 91 octane. If all you EVER use is 98 octane, you should get a tune for it, your car will perform MUCH better, tune is the best Evo mod IMO
I was told (meaning don't quote me on this at all) that 23 psi on 100 octane race gas was fine. My car had a K&N drop-in, Injen TBE and a tune for 21 psi 91 octane. If all you EVER use is 98 octane, you should get a tune for it, your car will perform MUCH better, tune is the best Evo mod IMO
Jan 9, 2008, 02:52 PM
#24
NO such thing as USDM 2003 GSR.
And this statement by your buddy scoob2evo is retarded: "Stock internals are only rated to 450 at the crank.... be carefull"
Now go find some more noobs like me. Be careful not to embarrass yourself some more though!
Jan 9, 2008, 08:57 PM
#26
Newbie
Thread Starter
Join Date: Jan 2005
Posts: 53
Likes: 0
Received 0 Likes
on
0 Posts
Is your electronic gauge setup as a boost controller or what?
I was told (meaning don't quote me on this at all) that 23 psi on 100 octane race gas was fine. My car had a K&N drop-in, Injen TBE and a tune for 21 psi 91 octane. If all you EVER use is 98 octane, you should get a tune for it, your car will perform MUCH better, tune is the best Evo mod IMO
I was told (meaning don't quote me on this at all) that 23 psi on 100 octane race gas was fine. My car had a K&N drop-in, Injen TBE and a tune for 21 psi 91 octane. If all you EVER use is 98 octane, you should get a tune for it, your car will perform MUCH better, tune is the best Evo mod IMO
Yeah, I don't live in US and 98 octane is all I use.
I was told US spec evos were designed to run on 91. (Correct me if I'm wrong)
Since mine isn't, I don't see why going over 20psi will heart me.
I'm gonna to put in a fuel pump couple of month later but for now,
I find no problem running on high boost.
And for the other guy who said it will run slower than stock,
you are dead wrong. goes much faster.
Jan 10, 2008, 09:59 AM
#27
Evolved Member
iTrader: (1)
Join Date: Mar 2005
Location: Mesoamerica/ SF Bay Area
Posts: 7,905
Likes: 0
Received 5 Likes
on
5 Posts
The thing is that the U.S. rates octane according to a different methodology than the rest of the world does. Most of the world rates octane by its Research Octane Number(R.O.N.). Conversely, in the U.S. the octane number posted on the gas pump is an average of the Research Octane Number and the Motor Octane Number(M.O.N.).
Thus in the U.S. pump octane=R+M/2
The Motor Octane Number is lower than the Research Octane Number due to the fact that Motor Octane Rating is tested under more severe load conditions. So, if you were to calculate the average between the lower Motor Octane Number and your so-called 98 octane R.O.N gasoline, you would end up with the same 91 octane gasoline sold in California.
You are in reality just running plain, old 91 octane (R+M/2) gasoline. So be careful! Don't assume that you can just turn up the boost in your untuned Evo! Get a tune and log your knock counts!
Last edited by sparky; Jan 10, 2008 at 11:12 AM.
The following users liked this post:
Evo2372 (May 7, 2018)
Jan 10, 2008, 10:41 AM
#28
Newbie
Thread Starter
Join Date: Jan 2005
Posts: 53
Likes: 0
Received 0 Likes
on
0 Posts
Sparky thanks for the info 
Then does US has octane ratings below 91's also? (For normal cars)
Anyways, how do you log the knock counts?
Is it ok to get tuned in just factory ECU or would I need to buy FC.
Then does US has octane ratings below 91's also? (For normal cars)
Anyways, how do you log the knock counts?
Is it ok to get tuned in just factory ECU or would I need to buy FC.
Jan 10, 2008, 10:51 AM
#29
Evolving Member
Join Date: Jan 2006
Location: Kansas City Missouri
Posts: 113
Likes: 0
Received 0 Likes
on
0 Posts
You shouldn't even think about turning up boost if you are stock, people need to stop watching the fast and the furious. you cant just turn up the boost and throw on some nitrous and be all fine and dandy
OH, and there really is no USDM 2003 GSR, you cant just google stuff and think you know everything.
OH, and there really is no USDM 2003 GSR, you cant just google stuff and think you know everything.
Jan 10, 2008, 10:55 AM
#30
Evolved Member
iTrader: (8)
Join Date: May 2005
Location: Arizona
Posts: 605
Likes: 0
Received 0 Likes
on
0 Posts
Knowledge is my friend. So let me repeat that for you Mr. I-think-I-know-it-all:
NO such thing as USDM 2003 GSR.
And this statement by your buddy scoob2evo is retarded: "Stock internals are only rated to 450 at the crank.... be carefull"
Now go find some more noobs like me. Be careful not to embarrass yourself some more though!
NO such thing as USDM 2003 GSR.
And this statement by your buddy scoob2evo is retarded: "Stock internals are only rated to 450 at the crank.... be carefull"
Now go find some more noobs like me. Be careful not to embarrass yourself some more though!
Wow ok your all right I have sure embarrassed myself here, So let me repeat that for you in 2003 there was a GSR and its only option was a sunroof because all evos then had HIDs and full carbon spoilers, that at the time were supposed to be an option, but were all sent to the dealer installed, the spoiler did however still showed up as an option on the sticker, there was no sound option at the time, that was added in 2004 called the "SSL" package along with a new model called the "RS", in 2005 the "MR" model was added to the USDM, giving the USDM 3 models of the Mitsubishi Evolution, the same models carried over to 2006 in the next gen evo the IX, however late in 2007 the "SE" model was added but only as a compliment to the "GSR" model and the "MR" model i.e. "GSR-SE" and "MR-SE" and they were still considered 2006 model evo IX's
/lesson
opps, there I go again being "Mr. I-think-I-know-it-all"
get a life noobs and return the neon or civic forum from which you came.
