Probably just a fluke, and until more comparisons come in I don't think anyone should be jumping to conclusions as they could have been all Monday/Friday cars. If you can document that AFR, timing, and MIVEC tables are identical and resulting boost and AFR in the dyno graphs are very close, that would be the first step. Ensuring conditions are similar on the dyno would be next of course. Making sure the mods are very similar if not the same would be the third.

After that if the WHP numbers are different consistently then something could be up.

 

A friend and I were tuned by Kaizen this weekend and we made within 10whp of eachother, he has a 12 and I have an 08. The tuner said even with the same basic bolt-ons we share I would fair a bit better due to the engine being well broken in. The only difference in mods was I have a FMIC, bigger injectors and fuel pump. His power curve was a lot smoother though.

 

I agree that is very possible and preach that more than anyone. 10-80-10 rule which is why I posted this in the first place. I wanted to see if the 3 cars I saw were the 10% low, the average, or the 10% high.

This me you are talking to. Done and done.

Within 14hrs of each other on the same dyno and mods were identical.

Thats why I posted. I dont mean to be rude or sound like I am jumping to conclusions but I gather a metric crap ton of data so while this might be an anomaly I had a feeling it wasnt

 

John,

Could it be that the add-ons have changed slightly between 2011 and 2012? Same part#'s, same supplier, different batch of parts?

Just a thought

 

I am very interested in this as well; I bought a 2012 Evo X MR and it just appears to be lacking from previous years. See my thread on my build; it has the baseline and new dyno graph (Mustang Dyno at CBRD). Even with all the bolt on mods (including BBX lite ported) and tune I cant seem to get over 340whp.

https://www.evolutionm.net/forums/ev...-bolt-ons.html

 

Aaron-

I have (SkylineFanatic's) a 2012 EVO X MR here-

it baselined (2-3 pulls) from 212-218whp--- (only mods were larger than stock and slightly heavier aftermarket wheels)

I was able to make 356whp/300wtq on our bbx lite with our bolt ones.... but normally I'd see about 15 whp more---

Car did seem a little weak over 6000rpm compared to the others regardless of my mivec tweaking-

cb

 

Chad... you've seen 15 whp more on MRs? (Just want to clarify this isn't a transmission / drivertrain drag issue)

 

So....is it a fluke or not? Are the '11s the best year then?

 

We're still trying to determine that. One thing is clear... there are varying results.

 

This thread makes me sad, however if they are down on power I hope its not by much 15-20hp can be found somewhere lol mods or weight reduction. ahhhhhh I'm trying to stay positive

 

As stated, it doesn't seem to affect all 2012s. Don't worry until you know it affects you. Hopefully by then well have an answer.

 

Maybe the next step is to stick the same set if cams in two cars. Have any 10s or 11s coming in to timing chain stretch Aaron?

 

the temperature varies greatly, but I think at one point we had a 2010 MR make around 230whp stock.... (the X's seem to vary alot more than the 8/9's on our dyno).. this one is dropping to around 205whp at redline.....

at stock power levels- There is a small variance between the MR and GSR- once we mod them the variance seems to be a little greater-

The one thing I noticed was that this car was a little more knock prone at high rpm- over 6200 it wouldnt take as much timing as most of them... I changed fuels- and it made little difference-

timing at peak torque and so forth was pretty normal, and I played with the mivec quite a bit-

It seemed to make normal torque- just lackluster up top-

cb

 

well if it turns out to be true, then there is a reason and it will probably just be something else to upgrade.

 

thanks for that post. i kinda noticed this a while ago in my own car but never tuned an evo before so i was waiting and frankly im glad it's not just my car.

as far as peak timing, i will second that note and i'm sure golden would as well. mine just wont take as much timing as others so just had to be a bit less aggressive up top.

i tried different fuel brands and stations to no effect.

i swapped spark plugs from the factory equipped revised NGK DILKR8B6 to the older ngk ILKR8BE to no effect. (i talked with NGK support to learn the difference in the plug is a .5mm difference in the firing position and the ground electrode has a different tip.) it was worth a shot and i was really hoping that would be the issue but it wasnt.

the only thing that resolved it was a can of torco added to 93 octane. car was able to take 3/4 more degrees of timing overall.

it's futile to compare dyno numbers but i agree with this. i would say my car was pretty close when it was stock but now with some parts and tuning i feel like it's a bit down on power from what it should be on previous similarly modded cars.