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Old 09-16-2020, 01:33 AM   #1
alexmartynyuk
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Member#: 191967
Join Date: Oct 2008
Location: Vancouver
Vehicle:
2005 EVO VIII
@boost_reality

Default Merpmod speed density

Any merpmod users on here? How is your idle? I just started tuning a friends hawkeye using the merp mod patch. Trying to get the car to run full speed density and i'm having difficulty to get the car to idle. For those of you that are using the merp mod in full speed density mode did you have to modify the engine load smoothing factor? Did you have to modify any of the alpha idle control tables? My problem is the car doesn't wanna idle worth crap, really difficult to scale VE down low because it keeps hunting and is really unstable and stalls frequently but sometimes just randomly settles and idles fine. I created a thread on romraider attaching logs and my map along with the ecuflash definition. Thread is here: https://www.romraider.com/forum/view...p?f=37&t=17598

A little bit on the car
07 hawkeye
Rom A2UJ000J merp mod patched
Freshly built short block using new case halves
Stock cams and stock sized valves
FP Black 8cm
Walbro 255lph with pressure relief mod
FIC 1000CC
Agency power rails with stock fuel pressure regulator
APS 73mm CAI

I fully tuned the car on maf before trying to switch to speed density, on maf the car ran fine for the most part. The only idle issues I had on the maf tune is it hunted a little after hot starts or after resetting the ecu but I didn't spend too much timing getting maf dialed in at idle so I figured it was because of that. Im hoping people are still using the merp mod patch, hoping to avoid going cobb just for speed density. Any input would be much appreciated!
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Old 10-05-2020, 02:22 AM   #2
benflynn
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Running merp but not sd, hybrid mode was created for idle If u still run the MAF for iat. From 15yrs of other sd tuning experience, itís lean in the ve map around the area itís bouncing, usually adding 10% over that whole area will calm it down enough to start dialing it in. This would come up when the tune was trying to maximize the mpg. I have never tried to correct this with out live tuning and map tracing, I imagine itís a pain
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Old 10-07-2020, 02:19 AM   #3
alexmartynyuk
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2005 EVO VIII
@boost_reality

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Quote:
Originally Posted by benflynn View Post
Running merp but not sd, hybrid mode was created for idle If u still run the MAF for iat. From 15yrs of other sd tuning experience, itís lean in the ve map around the area itís bouncing, usually adding 10% over that whole area will calm it down enough to start dialing it in. This would come up when the tune was trying to maximize the mpg. I have never tried to correct this with out live tuning and map tracing, I imagine itís a pain
This was my original concern. However I have since switched to running dimemod patch which I didnít even know existed up until a couple of weeks ago. Since switching to dimemod the car is running full speed density with iat still in the maf and so far idle is mint once warm. It hunts a little when warming up when the coolant is cold so I need to address warmup enrichment after VE is fully scaled which it nearly is. By the way this dimemod patch has insane features! It has:

Launch control that can be set to fuel cut or ignition cut or a mix of both.

Auto rev match

Rolling launch

Antilag

It has capability of controlling methanol injection

Map switching

Hybrid maf/speed density

Full flexfuel capable

All on a stock ecu. It does cost money but in my opinion still worth it and you still use ecuflash to edit the map as well as romraider logger to log. For those interested definitely worth checking out. As for why the car hunted idle and stalled on merp mod I have no clue. I ran smilar VE values down low but for some reason the car would just not behave.
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Old 12-11-2020, 07:07 AM   #4
pcampbell
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Vehicle:
2005 2.5 SC OB

Default Merpmod speed density

Where do you get it?

I want to run SD or hybrid on an NA (supercharged car) ecu so I need a little extra support. About to peg my MAF sensor on a 70mm ID housing. My IAT is relocated to post IC hopefully that is good.

Not sure if I want hybrid or straight SD. Bypassing the huge air flow on the supercharger is a bit of a pain so SD vent to atmosphere would be nice.
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Old 12-11-2020, 03:55 PM   #5
benflynn
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Someone has to edit a rom for ur ecu, I doubt itís out there. There was a speed density forester, I had one, was 1999ish.

I think a turbo ecu if possible w/sohc. cam sensors or get someone to mod ur rom . All this is on romraider site
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Old 12-22-2020, 08:40 PM   #6
alexmartynyuk
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@boost_reality

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Dimemod will only work with 32 bit ecus equipped with an immobilizer. As for the patching service hit up @dime_spb on Instagram since thatís who I purchased the patched rom from.
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Old 12-23-2020, 01:12 PM   #7
jon7009
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Chapter/Region: NWIC
Location: Oregon
Vehicle:
2003 WRX Flex Fuel
EJ205 TD04L FMIC SD

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note: when using merp for speed density, you have to crunch the Sd/IAT load comp into the MAF g/s IAT comp table

Dime has a traditional/cobb/carberry sized sd/IAT load comp
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Old 01-17-2021, 07:07 AM   #8
pcampbell
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Join Date: Jan 2016
Location: VT
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2005 2.5 SC OB

Default Merpmod speed density

Quote:
Originally Posted by alexmartynyuk View Post
Dimemod will only work with 32 bit ecus equipped with an immobilizer. As for the patching service hit up @dime_spb on Instagram since thatís who I purchased the patched rom from.


Is it literally only cars with immobilizer or just drive by wire cars? Canít really think what the immobilzer has to do with it.
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Old 01-30-2021, 03:44 AM   #9
alexmartynyuk
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2005 EVO VIII
@boost_reality

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Quote:
Originally Posted by pcampbell View Post
Is it literally only cars with immobilizer or just drive by wire cars? Canít really think what the immobilzer has to do with it.
Unfortunately its only on cars with an immobilizer. The reason being is that the patch is not free and that's the only way the developer can get consistent income. He vin locks the patch so that you cannot use it on a different car with the same rom. The only way that can be done is through the immobilizer, that's why he can only do it on immobilized roms. And also because the non immobilized roms don't have enough space to make the patch work.
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Old 01-30-2021, 09:38 AM   #10
pcampbell
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Can you put tell me how to contact the developer?

I am pegging my MAF now, need to decide to go bigger draw through, blow through MAF or something else. There is , as far as I can tell not enough support for me to do MerpMod.


Sorry you said already on IG... I'll see if I can find them. I am not on IG!
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Old 02-02-2021, 04:45 AM   #11
alexmartynyuk
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Member#: 191967
Join Date: Oct 2008
Location: Vancouver
Vehicle:
2005 EVO VIII
@boost_reality

Default

Quote:
Originally Posted by pcampbell View Post
Can you put tell me how to contact the developer?

I am pegging my MAF now, need to decide to go bigger draw through, blow through MAF or something else. There is , as far as I can tell not enough support for me to do MerpMod.


Sorry you said already on IG... I'll see if I can find them. I am not on IG!
If you are on RomRaider send him a message, his username is DimeSPb, or dime_spb on instagram.
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Old 02-03-2021, 09:36 AM   #12
pcampbell
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Thanks found him just waiting for some more details. He did say he could do my rom.
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Old 02-04-2021, 02:40 AM   #13
alexmartynyuk
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Member#: 191967
Join Date: Oct 2008
Location: Vancouver
Vehicle:
2005 EVO VIII
@boost_reality

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Quote:
Originally Posted by pcampbell View Post
Thanks found him just waiting for some more details. He did say he could do my rom.
Awesome and good luck!
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