When I datalogged my car, I noticed that my timing is getting pulled to 15 degrees in the higher rpm in all gears, but especially 3rd and above. Now the way the turbo cars work is that their timing is only pulled when their ECU detects knock. So would it be safe to assume that my engine is knocking in the higher rpm, and that is why the timing is getting pulled?
I know our ECUs cannot pull timing nearly as much as the Turbo ECUs can, which is why it stops at 15 degrees and doesn't go any lower.
I see 25+ degrees normally under regular driving, and while boosting in 1st and 2nd gear. Above that, however, it just goes out the window. So basically am I detonating the crap out of my engine?
If anyone has access to a datalogger or pocketlogger and is NOT turbo and IS OBDII, I would like to see what your timing looks like. If I really am knocking, then it would be disasterous to up the boost over 7psi.

My Air Fuel holds firm at .94-.95 all the time, so not getting enough fuel really isn't a problem.


On another topic...

My lag is horrible. I don't hit full boost till at least 4500rpm. Thats bad. I have no leaks and the turbo is fine. I have the stock dp where I cut it to fit the Hahn add-on, the stock cat, and a 3" Thermal cat-back. My lag really shouldn't be that bad for just hitting 7psi...
Would getting a test pipe and better dp really help that much with the lag?
Also, has anyone thought of swapping a 14B or 16G exhaust housing on the Super 16G? I would think that would help with lag quite a bit. Going from 10cm to 7cm would help with throttle response, and still keep the top end there. As for wheel spin, yes it will help the wheels to spin off the line a bit, but will reduce lag right after shifts and overall throttle response. If boost creep is a problem with the smaller housing, a dump tube could be added to help the wastegate flow, along with porting and a larger flapper.
I don't know if all this is worth it, but for having only 7psi running through the car, it would be nice to have that power hit a lot sooner than it does.

Any comments welcome.



-Jeff
1999 Mitsubishi Eclipse GS-T'd and HRC'd

http://gs.dsmpower.com

Check for boost leaks. I get 18psi by 3400-3600rpm. You should get 7psi before 3000. Something is wrong.

MuRiX
97 Eclipse GS HRC Stage IV+
Sitting and collecting dust most of the time..
A.D.P.
http://www.murix.com

05 Mazda RX-8
06 Lotus Elise

Thanks Chris...I guess I'll check again for leaks..

Any idea on the timing?

Thanks.

-Jeff
1999 Mitsubishi Eclipse GS-T'd and HRC'd

http://gs.dsmpower.com

I recall a Corky Bell quote that encourages the use of large compressor housings that do not necessarily have any bearing on spool up speed.
I know you're referring to the exhaust housing, but after reviewing the difference in turbo efficiency, I just wouldn't bother. I think the slow spool is certainly attributed to something besides the turbo in your case.


Jason
98' Eagle Talon ESi-T
Mitsu Super 16g Turbo(HRC)/Custom FMIC

http://springfielddsm.homestead.com/JasonsPics.html

_____________________________________
Jason ESi-T

04' BMW 325Ci
91' Nissan 240SX
98' Eagle Talon ESi (sold)

My turbo gets 16-17psi by 4k (I know different engine etc..)But I have a considerably larger turbo. Spool up shouldn't be that bad with a 16G, 10CM housing or not. Have you did a compression check on your car to make sure it's still in tip top shape? Good Luck though. The timming advance is strange being that you get full advance in 1st and 2nd but not in 3rd. Hmm..let me think about that one for a bit...



Derek
DeezGst on aol's IM
http://www.fastasknutz.com
http://www.thebandfleenor.com/car site/index.html

New Toy


Old toy: 1997 GS-T
8.4@87 1/8th pump/street tires

I liked my car with the stage I...without the intercooler. Now I don't move, meaning feel a pound, until around 3-3.5k..it sucks daily driving. I'd trade anyone with a T3 for my T3/T4 if it could just bolt rite in.

Disgruntled RST owner
ALvin



Star stage I
Starion I/C
GReddy BOV
Nology Wires
APEXI EL Boost Gauge
Southland Dual Friction Clutch
B&M Short Shifter/ Shifter Bushings
17" Axis Wheelsite Mesh - 235/40
Camberkits
Eibach Sportlines on KYB AGXs
Strut Bars/ GST Rear Sway Bar
X-Drills w/ Axxis pads
Andy's Front Bumper
Stock Skirts
Cleared Headlights

Alvin

http://www.cardomain.com/id/96rst

Jeff, You have to have a leak somewhere because I hit 6 psi at about 2600-2700 rpm's. My car spools up almost instantly.

DAVE_FL
97 T-GS
HRC stage 2

Orlando DSM www.orl.dsm.org
DAVE99@cfl.rr.com

I went driving for a while today, and the car seemed to hit full boost a lot sooner for some reason. The most consistent thing about my car is that it is never consistent.
I was seeing 7psi by about 3600 today.
Go figure.

The only place there could be a boost leak is the BOV. Is it normal for it to be leaking at idle? Mine does... wonder if that is the cause..


-Jeff
1999 Mitsubishi Eclipse GS-T'd and HRC'd

http://gs.dsmpower.com