ok my cuzin has been havin some problems and i want to see if ne1 can help us out. he has an 04 evo with intake, turboback no cat,intercooler pipes, fmic, fuel pump, boost controller, hks 280 cams, meth, hks dli2 amp. and got tuned with ecutek and made around 370 and 380 trq on a dyno jet. The problem is that he bought a evo 9 20g and got a ported stock manifold and an o2 housing and installed everthing goes back and gets retuned and only made 7 more whp and 9 pounds of trq and switched to the big meth nozzle. can some 1 tell me how a 16g with 9.8 makes same power as a 20g with a 10.5 and mind u the car was tuned by the same person. we came to the conclusion that the car needs bigger injectors and are gonna try it but the tuner says that the injectors are not the issue. how is it this car doesnt make the power and so many countless other evos with 20gs make close to 450 whp? ne help would be great and sry for my writing methods im lazy.

 

So many evos are making close to 450whp on the 20g? Name 5.

 

i live in ga and i know 2 ppl, a guy named charles made 430 with 20g and a friend named phil made 440 with a 20g. if ur just gonna post to start stupid **** just find another tread im tryin to get actual help.

 

did u change the plugs and check the gap?

 

when everything was installed the car new plugs correct mitsu gap and new oil new radiator fluid too. turbo was primed before startup to make sure it had oil in it. the turbo is new not a used turbo.

 

the correct mitsu gap is proably to big for the boost he is running they recomend you gap to 32
with the boost he is running they should be gapped to 25 26,i dont know if thats the problem just something i been playing around with my car it makes a big diffrence.

 

maybe he needs to turn the boost up more and get a better wga? just a thought

 

thats wat i thought on first tune he had small meth nozzle and spike to 30 pounds and taper to 19 and made the numbers this time he has a big meth nozzle and 26 pounds to 21 but he can not up boost cuz the tuner said stiochiometric (not sure how to spell) for meth is 8:1 while gas is 14.8:1 so the car is runnin 10:1 around 4500 to red and the said there is not enought octane to tune nemore and ga has 93 oct!! i think that the injectors are around 85% and dont have nemore in them and he needs to go to 680 or 720s even if 450 is not possibly y do evo 9s make atleast 410 on average and his car is not even 400 its at 380???

 

Is this a 5 blade or 6 blade 20G? If its a 6 blade that could be the problem or the fact ur were running 4 less psi.

 

x2...It helped a lot on my stock 10.5.

 

So you are running less boost than before, correct?

 

I am not really sold on the 20G so much. I really believe that the 50 Trim is the way to go.

 

ok were i see the problem is that on waste gate preasure 12 pounds it is wat the bc was set at first it made 310whp and 299 trq on 12pounds!!! why is it when the boost got turned up the gains did not continue in that form cuz his 16g did not make that on wastegate. the first tune on 16g no tune at 20 pounds made 290whp.

 

ok to the answers above the car was gapped to 26 on the plugs the car is runnin 4 pounds less but tuner said boost cant go up b/c there is not enough octane the comp pulls timing so i was thinking if turbo flows that much more volume and ur outta gas u need injectors right?

 

Whoa!

Your injectors are not the problem, END OF STORY.

Your tuner is incorrect. Stoich for methanol is 6.4:1, but that doesn't make any difference where your AFR readings are concerned. IF you are using methanol your tuner will need to REMOVE gasoline from the mixture and tune the car for the same ~11.5:1 indicated AFR that he would use without methanol. If the car is running at 10:1 with methanol this is TOO RICH for best power.

You didn't mention which other mods this '20g' car has (if any), but I hope you have a good 3" TBE and some other hardware (e.g. cams) if you expect to get decent power out of it. And oh yeah, all '20Gs' are not created equal.