The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. Log in to remove most ads.

Please Support Kiggly Racing
Please Support Fuel Injector Clinic

2G E3 16G & HKS 264/272

This site may earn a commission from merchant
affiliate links, including eBay, Amazon, and others.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

MattE

10+ Year Contributor
59
0
Jun 25, 2009
SWANSBORO, North_Carolina
Right now I am running an FP E316g with 264/272 cams. The wastegate is sourced right off the j-pipe. I am trying to figure out what I am seeing is normal. I build boost to 8psi at about 3k and it stays there until I hit about 5k. Once I hit 5k, the power kicks in again and the boost starts to raise to about 12-13psi. Like I said I am trying to figure out if this is somewhat normal. Thanks for any help that is given.
 
Have you already bypassed the BCS, it sounds like it is still in line with the wastegate. If it is, try running a vacuum/boost line from your j-pipe directly to the WG.
 
No thats not normal ..... I would check the lines for boost controller ( if they are pinching or get bent ) vaccum lines etc ... this same thing happened to my wastegate on another car and it would pinch off. If it is it will be hard to track done.
 
I just went out to my car and double checked the hose connecting the wastegate to the boost source. Everything there looks good still and its a newer hose that is on it.
 
Personally, I noticed this as well with my Evo3 16G that was clipped 15* on the turbine. If yours is not clipped, it should have the good ol fashion 'neckbreakin' torque spike at around 3k.

I would get 10 psi from 2.5k to about 3.5k, then it would shoot to 22psi by 4k.

This is compared to my TD05H 8cm FP68HTA, which would get to 22psi by 3.5k, but in a very linear fashion. 0psi at 2.5k, 10psi by 3k, 22psi by 3.5k. ( Sold that one for $650)

It worked for me since what really happened is the torque was shifted to the right towards the higher RPMs. No psi drop on a 2.3 stroker w/ FP2 cams at 22psi. Less driveline breakage and more top end power. But again, my turbine side was clipped 15*...My 2 cents.
 
brane_97talon, so what you are telling me is since mine isn't clipped I should be getting more power lower in the rpm range than I am. Is that correct?
 
It's very common for an E316G to boost creep/spike. Usually the main cause is the restrictive internal wastegate. I can't keep mine under 18psi even with just a straight line to the wastegate.
Another possible issue could be excessively long lines from the boost source to the wastegate. Keep those as short as possible and the wastegate will be more responsive.
 
If you are running an 8psi wastegate, then thats normal as you say you are running directy off the j pipe ( no boost controller).
Once you climb to 5k, it sounds more like you are now creeping above what the wastegate valve can bypass and your boost level increases until you let off.

That is, if youre not running a boost controller as your post suggests.
 
That does sound about right then. So if I add a boost controller in the mix and bump it up a little bit that should help correct the issue.
 
It did not help with mine. I turned to 12 and by 5-6k was at 18psi ish. Porting the internal dump hole helped mine. I'm now running a 14b until I get it rebuilt.

But it does sound like boost creep.
 
Ok. This weekend I raised the boost to 18psi. It seemed to have fixed most of the problem. But at about 5.5k rpm it almost acts like the clutch is slipping. But its a brand new clutch and friction plate and I do not smell any clutch.
 
brane_97talon, so what you are telling me is since mine isn't clipped I should be getting more power lower in the rpm range than I am. Is that correct?

Totally missed the fact that your are running an 8 psi wastegate.

At that low boost, you are getting boost creep. I also didnt see any supporting mods so boost creep or 18psi could possibly damage your engine. You probably are hitting fuel cut, which is the bucking and missing you are describing.

Keep it around 10-12psi and your motor will thank you. I wouldnt run 15+ just yet. A stock Evo 3 Lancer runs 15psi but also has 510cc injectors, 60cc over stock. Best comparison I could think of.
 
94 awd is correct .... wel I agree with him that the wastegate dump valve sounds suspect may have the hole opened but leave atleast 1/4 .250 of an inch around for the flapper to have something to sit / seal against.

As for running the E16g at low psi , I actually preferr to use my turbo's from low to medium psi as it does not heat them up as much and you can a more steady cfm flow ....once they heat up the air becomes less dense and works the turbo much harder. My 16g I have ran at no more then 22 psi usually around 18psi for high boost and low boost ( launching and 1st gear ) I set at 13psi. Thats just me and my opinion ...do as you like.

Also make sure your wastegate diaphram is not leaking, I have seen some same issues with bad diaphrams
 
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Innovation Products Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications MyMitsubishiStore.com RixRacing RockAuto RTM Racing STM Tuned

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds

Back
Top