Diablosport Forums

so want changes does the 93 tune do to a srt4 ...does boost go higher?better trottle response?etc?
thanks for info

Boost can be raised, throttle response is improved, timing and fuel are optimized, and overboost codes are eliminated.

o got u thanks for the info. being as im using 91 octane with 93 tune, i was told to take a couple of degrees of timing in all rpm's or would u just recommend just taking time in the rpm were i see knock??
also was told getting 3.0 of knock is safe and ok on stock pcm is that true?

Why don't you usew the 91 tune? Only difference is timing, which you're pulling anyway.

Mike_Levy wrote:Why don't you usew the 91 tune? Only difference is timing, which you're pulling anyway.

You Hemi guys are always good for a laugh.

Srt-4 only have 1 tune ----93 Octane

that be nice if there was a 91 but i guess i will check and see how bad my knock is and go from there

newsrt4 wrote:o got u thanks for the info. being as im using 91 octane with 93 tune, i was told to take a couple of degrees of timing in all rpm's or would u just recommend just taking time in the rpm were i see knock??
also was told getting 3.0 of knock is safe and ok on stock pcm is that true?

3 degress of KR isn't a big deal

Only remove up to 1/2 of the max(1.5 in your case)
Never remove timing from the whole RPM range. I generally start at the RPM range before max knock and retest.

For example:

if your max knock was at 4500rpm. Remove 1 degree from 3K-4K and see how it goes.

If Max KR is less than 1.5-2,,you're good.

okay sweet thanks for some really good info. i will log and see where i get some and do it like u say

duster360 wrote: You Hemi guys are always good for a laugh.

Srt-4 only have 1 tune ----93 Octane

Well, now thats stupid. Knowing half the country can't get 93, you'd think they'd put a 91 tune on the 7134 as well.

Mike_Levy wrote:

duster360 wrote: You Hemi guys are always good for a laugh.

Srt-4 only have 1 tune ----93 Octane

Well, now thats stupid. Knowing half the country can't get 93, you'd think they'd put a 91 tune on the 7134 as well.

It is simply mislabeled...Brian and I had decided to simply call it 'Diablo Tune', and have the disclaimer read that it is for a min. of 91 octane fuel.

That did not happen for some reason....

mikel wrote:

Mike_Levy wrote:

duster360 wrote: You Hemi guys are always good for a laugh.

Srt-4 only have 1 tune ----93 Octane

Well, now thats stupid. Knowing half the country can't get 93, you'd think they'd put a 91 tune on the 7134 as well.

It is simply mislabeled...Brian and I had decided to simply call it 'Diablo Tune', and have the disclaimer read that it is for a min. of 91 octane fuel.

That did not happen for some reason....

and probably gets everybody confused like me lol

So after a couple of runs and changes I'm stuck still
my mods
s0,s1 injectors,SrI,3in dp,3in catback,stock wga,

I have the 93 tune
3-4 rpm I retard time 3 degrees
4-5 rpm I retard time 3 degrees
cause I had knock but it's pretty much gone
+11% boost in all rpm's
I was getting almost 14.00/1 afr so I keep adding fuel I'm at 25% and now I'm getting 12.9-13.2 afr

can anyone tell me what I'm doing wrong

newsrt4 wrote:So after a couple of runs and changes I'm stuck still
my mods
s0,s1 injectors,SrI,3in dp,3in catback,stock wga,

I have the 93 tune
3-4 rpm I retard time 3 degrees
4-5 rpm I retard time 3 degrees
cause I had knock but it's pretty much gone
+11% boost in all rpm's
I was getting almost 14.00/1 afr so I keep adding fuel I'm at 25% and now I'm getting 12.9-13.2 afr

can anyone tell me what I'm doing wrong

Either your wideband is reporting an incorrect A/F of you might have a fuel supply issue.

If the A/F were really that lean, i'd expect you'd get more knock. So my initial suspicisions are the A/F measurement might not be accurate.

Are there any exhaust leaks upstream of the O2 sensor?
Do you have the wideband in front of the cat?
Save your modified tune and flash back to the stock one. Does the A/F richen? stock A/F is usually around 10-10.5.
Check fuel pressure at WOT to see if it drops.


Can you post your last tune written and a datalog?

ps, For 3 degrees of Knock you shouldn't have removed 3 degrees of timing. It might seem like it makes sense but all you're really doing is making your car slower.

so i went back to stock flash at WOt i will get anywhere between 10.8-11.00.

as far as the knock before i messed with it i was getting about 4-6.00 counts of knock between 3500-6000 rpm then pretty much went away once i retarded about 3.00 degrees.

i dont have the usd wire i just ordered and hasn't come in yet. so i wont be able to load up the data.

the wideband sensor is before cat.

im on stock fuel system and never changed out my fuel filter and have about 90,000 on my all fuel system

bump for any help