| View previous topic :: View next topic |
| Author |
Message |
GTP98 Total posts: 1787
Jay1998 Grand Prix GTP Joined: 03 Oct 2003 Location: b-loooooow Age: 43 |
 Posted: Tue Apr 29, 2008 8:12 am Post subject: Lets talk MPG |
 |
|
What are you guy's running for timing at cruise?
Mine is only low 30's right now, want to bump it up but not sure how high to go.
_________________
'08 TrailBlazer SS Black/Black |
|
| Back to top |
|
 |
| dezldave961 Total posts: 808
Dave P.2004 Regal GS Joined: 23 Nov 2003 Location: Omaha, NE (was Rome, NY long ago) Age: 40 |
| Posted: Tue Apr 29, 2008 9:47 am Post subject: |
|
|
37* from 1600-2400 & trailing off to 16* by 3600+... didn't make a huge change, but can't hurt.
- Dave
_________________
2004 Regal GSX - YouTube channel Stattama T67BB, A2W IC, ST5, heads, L32, GMR diff/chain (11.46 w/ Z7 T66, IS3t cam)
2006 Grand Prix GXP - K&N intake and mufflers only, basically stock for me
2012 F-150 EcoBoost SuperCrew 4x4 - stock DD and roadtrip vehicle
1998 Daytona GTP #838 - I/C*d MP112 L26 - Rust in Peace, engine saved |
|
| Back to top |
|
|
| GTP98 Total posts: 1787
Jay1998 Grand Prix GTP Joined: 03 Oct 2003 Location: b-loooooow Age: 43 |
| Posted: Tue Apr 29, 2008 10:07 am Post subject: |
|
|
| Dave what are you thoughts about leaning out a/f a bit to say 15.0-15.1? |
|
| Back to top |
|
|
| dezldave961 Total posts: 808
Dave P.2004 Regal GS Joined: 23 Nov 2003 Location: Omaha, NE (was Rome, NY long ago) Age: 40 |
| Posted: Tue Apr 29, 2008 11:13 am Post subject: |
|
|
Our tuners don't show enough of the pcm's tables to properly do that. Unfortunately the A/F changes end up affecting things in PE, since somehow it's using closed loop as a reference or zero point. (Someone alot smarter than me explained this in a chat once.)
In reality, the car seems to run in the 15.0 range or so on widebands, due to inaccuracy of the stock O2 over time (not a bad thing, Holdens have a mode that occassionally sees 17:1). Also, that NB sensor is only meant to try keeping your car in the 14.7 area, so shifting that may affect steadiness of the A/F.
- Dave |
|
| Back to top |
|
|
| GTP98 Total posts: 1787
Jay1998 Grand Prix GTP Joined: 03 Oct 2003 Location: b-loooooow Age: 43 |
| Posted: Tue Apr 29, 2008 11:42 am Post subject: |
|
|
| good info, I might try and mess with it a bit to see what happens. |
|
| Back to top |
|
|
| Joe_Omerta Total posts: 867
Joe Ventresca2000 Grand Prix GTP Joined: 24 Jul 2005 Location: Blasdell Age: 37 |
| Posted: Tue Apr 29, 2008 12:33 pm Post subject: |
|
|
Jay, that timing table u gave me a few years ago had me running 42* timing while cruising on the highway, mpg was great. i need to swing out ur way to get that table again. it had 19* @ WOT too 
_________________
2004 Yukon XL Trying to keep stock
2000 gtp Custom I/C, TOGs, Custom PCM, 3.25'', HAI, VS cam Retired |
|
| Back to top |
|
|
| GTP98 Total posts: 1787
Jay1998 Grand Prix GTP Joined: 03 Oct 2003 Location: b-loooooow Age: 43 |
| Posted: Tue Apr 29, 2008 1:52 pm Post subject: |
|
|
Yeah that table was nice. I need to upload it to my file. The one I have now is so-so.
We do have to meet up, I want to show you the new front mount I put on. Nicer than the jegs rad I had before. |
|
| Back to top |
|
|
| seen96 Total posts: 2033
Drag Radials Suck on FWD.1997 Grand Prix GT Joined: 01 Oct 2003 Location: elbows deep in 4t65e Age: 45 |
| Posted: Tue Apr 29, 2008 4:25 pm Post subject: |
|
|
Like I was telling you Jay, you should check out that '04+ GTPs timing tables. They're running up to 50degrees adv. I'm running with 41~45degrees advance. Awsome throttle response and great MPG. I wouldnt mind doing some driving/scans and see if I can get it up to 50 degrees advance.
 instead of seeing who can go faster, these days we're gonna see who can get the best mpg.
_________________
ZZP stuff...
Heads (started as ZZP stg.3 with some improvements)
Cam (XPZ with a slightly different components for valve movment)
IC (Ford Cobra coolant resv., frt exchr the size of a engine rad. weight consum. rear expans. tank)
"Certified Auto Trans Shop" Transmission sold by ZZP...I have no comment for this peice of...great trans. 
Also,
SLP Headers <--FOR SALE
Eaton's Gen.3 M90 |
|
| Back to top |
|
|
| studderin Total posts: 6272
John Csotello1998 Grand Prix GTP Joined: 01 Oct 2003 Location: 2nd gear burnouts Age: 42 |
| Posted: Tue Apr 29, 2008 6:24 pm Post subject: |
|
|
dave in right,
you guys should get a t56 2 over drive gears gets great highway milage
_________________
New Era performance
01z28, M6 NA, mullet, T tops, siqqqq |
|
| Back to top |
|
|
| redross17 Total posts: 3600
Brian Ross2004 Grand Prix GTP CompG Joined: 11 Dec 2003 Location: Buffalo Age: 48 |
| Posted: Tue Apr 29, 2008 6:42 pm Post subject: |
|
|
| seen96 wrote: | | Like I was telling you Jay, you should check out that '04+ GTPs timing tables. They're running up to 50degrees adv. I'm running with 41~45degrees advance. |
lol...wtf I get about 26-28* on zee hightway. Explains a lot about my tune, eh? 
_________________
2018 Acadia
Retired: 2014 ATS, 2004 GTP |
|
| Back to top |
|
|
| BigEd88 Total posts: 704
Ed Green2004 Grand Prix GTP CompG Joined: 19 Apr 2007 Location: Amherst (Buffalo), NY Age: 36 |
| Posted: Wed Apr 30, 2008 9:05 pm Post subject: |
|
|
Checked mine out, 40*+ are common when cruising.
Studderin any hope for a 4L60E 4000 stall and MPG? opps I've said to much.....
_________________
Best Formula N-A 12.1 @ 110 (pre-engine swap) |
|
| Back to top |
|
|
| Joe_Omerta Total posts: 867
Joe Ventresca2000 Grand Prix GTP Joined: 24 Jul 2005 Location: Blasdell Age: 37 |
| Posted: Thu May 01, 2008 8:42 am Post subject: |
|
|
| soo yeah, i'm thinking vs cam, stock t-stat, stock spark plugs, decent tune and keep my 3.25" and see what kinda mpg i can get this summer. i figure the vs would be better than stock due to the low end power. |
|
| Back to top |
|
|
| GTP98 Total posts: 1787
Jay1998 Grand Prix GTP Joined: 03 Oct 2003 Location: b-loooooow Age: 43 |
| Posted: Thu May 01, 2008 10:18 am Post subject: |
|
|
| IM going back up to a 180 t-stat (when I find my old one) plugs and clean filter this weekend. IM hoping to see 30+ after some tuning. Right now im seeing 24 average with year old 104's, 160 t, dirty filter, 29-30 timing and no EGR. A/F is high 14's on the highway |
|
| Back to top |
|
|
| KC2GIW Total posts: 5563
Matt Antonio1998 Grand Prix GTX Joined: 11 Jun 2004 Location: SYR/ROC Age: 24 |
| Posted: Thu May 01, 2008 10:25 am Post subject: |
|
|
| GTP98 wrote: | | IM going back up to a 180 t-stat (when I find my old one) plugs and clean filter this weekend. IM hoping to see 30+ after some tuning. Right now im seeing 24 average with year old 104's, 160 t, dirty filter, 29-30 timing and no EGR. A/F is high 14's on the highway |
You got a lot of things going against you.
I think the EGR is good for at least a full MPG.
104s are cold..but I mean..you need them.
g/l...interesting stuff.
_________________
Hi, I'm Matt. I'm the resident smartass and I have fourblack children: (ok, one's only half black..)
07.5 2500HD, Duramax, Edge Race Evo CTS, MBRP 5" Stainless, TransGo, Sleeves, EGR!, PCV
09 VRSCDX - Night Rod. Flat black, gloss black
02 Black Z06. All work done by New Era Perforamnce. 519/497 at the rear, 3100 lbs.
05 Arctic Cat Firecat F7 - Sold
07 Arctic Cat F8 Sno Pro - Smashed into 1000 orange pieces. |
|
| Back to top |
|
|
| KC2GIW Total posts: 5563
Matt Antonio1998 Grand Prix GTX Joined: 11 Jun 2004 Location: SYR/ROC Age: 24 |
| Posted: Thu May 01, 2008 10:27 am Post subject: |
|
|
| BigEd88 wrote: | Checked mine out, 40*+ are common when cruising.
Studderin any hope for a 4L60E 4000 stall and MPG? opps I've said to much..... |
wtf do you need a 4k stall for that's not going to break a stock 4l60? |
|
| Back to top |
|
|
|
Album
Calendar
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages 
Log in