Why cant i get my MPH up???

[jojo]

Ok guys consistent track runs for the past month. Every run as follows:

2 runs 13.01@105.87MPH
3 runs 13.02@105.8MPH
1 run 13.03@105.78MPH
1 run 13.04@105.67MPH

Why cant i get the MPH up?? the cars feels strong as all hell. Let me start by saying im running regular radials (i know i need slicks or drag radials, which im going to do next track trip, but wanted to see what i can do on these **** radials.) Im not sure the height of the Nitto 450 radial, but probably will need the 26" tall for starters right? get this!!! im running 22# of boost with 0 knock with a 22/19 degree extender chip!!! and 02s solid 760-766 at the end of the run. I just ported my 44 wastegate hole to get rid of the creep in third. Walla!!! its gone. But i think i may have compensated for a little lag of the line spool up by porting the hole im running the 3" MAF with the trans box, and it seems that my 02s will not richen up anything past 766 even when i turn a couple of clicks on the WOT inside the Trans box. What up with that?? Base fuel set at 45psi according to the extender chip. So what are my options? and is this all seem normal from the information provided? this is probably a UNGN question im sure but please let me know opinions and experiences.

thanks

jojo

 

[blackshoebox]

Whats the rest of your combo, TE-44, 009's and what else?? From the sound of things, I would look at one these things.

1. Timing seems low for the amount of boost you are running. Maybe raise it.
2. You should be richer with baseline fuel pressure at 45, with the vacume line on the regulator, you may have a vacume leak somewhere if the car is that lean, with that fuel pressure.
3. Check the valve springs, if they are weak, the car will not mph as well.

Also, are you at a higher elevation over there? This may have a slight affect on you trap speed also.

HTH,
Alex

 

[UNGN]

MPH Check list:

Lock converter - check
New Valve Springs - check
Free Flowing Exhaust - check
26" MINIMUM tires (Nittos 275/50 are only 25.6) - check
Accurate Tach or Scan Tool - check


Find out What RPM 106 mph is. If you are running 5400+ @ 106 lock the converter or get taller tires.

If you are running 4900 RPM at 106 mph, get new valve springs or look for an exhaust restriction.

 

[jojo]

Originally posted by blackshoebox
Whats the rest of your combo, TE-44, 009's and what else?? From the sound of things, I would look at one these things.

1. Timing seems low for the amount of boost you are running. Maybe raise it.
2. You should be richer with baseline fuel pressure at 45, with the vacume line on the regulator, you may have a vacume leak somewhere if the car is that lean, with that fuel pressure.
3. Check the valve springs, if they are weak, the car will not mph as well.

Also, are you at a higher elevation over there? This may have a slight affect on you trap speed also.

HTH,
Alex

Hey black im waiting for my other extender chip to get here. Im sending this one back because i wanted the converter to lock up in cruise speed at 51mph instead of 45. So the new chip is being burned for 23/20 for the timing. i may have to check the valve springs again. I was trying to eyeball my rpms with the quick update scanmaster while blasting down the track. I think i got as far as 5200 or so rpms when i took my eye off the gauge. I dont think i have a vaccum leak anywhere as the fuel pressure stays consisten at 45# line off. My car pulls like a madman and i cannot launch with any boost, as i tried that and ran a 13.5 spinning about 40ft down the track, so you see that didnt work. The car is definately making all kinds of torque, and feels strong as all hell, but there is the HP issue with my speed.

thanks

jojo

 

[jojo]

Originally posted by UNGN
MPH Check list:

Lock converter - check
New Valve Springs - check
Free Flowing Exhaust - check
26" MINIMUM tires (Nittos 275/50 are only 25.6) - check
Accurate Tach or Scan Tool - check


Find out What RPM 106 mph is. If you are running 5400+ @ 106 lock the converter or get taller tires.

If you are running 4900 RPM at 106 mph, get new valve springs or look for an exhaust restriction.

UNGN will definately get the taller tires, as the ones on there now are 245/60/16 Nitto radials.

Great Exhaust-check
9x11 converter shop lockup-check
Valve Springs-check
Scanmaster Tool, accurate??? -check

and where is a good place and what tire would you recommend for my stock 15x7 inch rims i believe they are for the strip?? and what would be good for the street. Remember my car is making a **** load of Torque at 22# of boost and nothing but 100 octane.

thanks,

jojo

 

[blackshoebox]

Richen it up...

Jojo,

If you are getting 760 o2's with that fuel pressure setting, with the vacume line on the regulator off, I would richen it up about 2lbs and see if it picks up. 760's sounds a little lean to me at the top of the traps. I prefer 02's in the 780-810 range.

-Alex

 

[Scott Atk]

jojo,
I dont think your locking your converter at the track as UNGN suggests. You need to wire up a switch to manually lock it up. If I'm not mistaken you havent done this. This is why I suggested that you have your new chip programmed for 80 mph lock-up at WOT.

 

[jojo]

Re: Richen it up...

Originally posted by blackshoebox
Jojo,

If you are getting 760 o2's with that fuel pressure setting, with the vacume line on the regulator off, I would richen it up about 2lbs and see if it picks up. 760's sounds a little lean to me at the top of the traps. I prefer 02's in the 780-810 range.

-Alex

Ok black ill give that a shot.

thanks

jojo

 

[jojo]

Originally posted by Scott Atk
jojo,
I dont think your locking your converter at the track as UNGN suggests. You need to wire up a switch to manually lock it up. If I'm not mistaken you havent done this. This is why I suggested that you have your new chip programmed for 80 mph lock-up at WOT.

Scott i called Ramchargers i knew this but im not sure if i had to program it to lock or not. I thought my converter would automatically lock at 45mph if i didnt program it, but im going to program it now because there are settings for me to lock it up at a couple of different mphs i beleive the options are 49,51,53 mph WOT to lock it up.

 

[Scott Atk]

I think your confusing part throttle and WOT lock-up.

 

[jojo]

 

[Scott Atk]

http://www.gnttype.org/techarea/electrical/switches.html

 

[Ed Valvo]

Tranny slipping? I once had a slipping tranny and I would run 13.30 all day long no matter what the boost was set at. Changed tranny, knocked off 1 second....

 

[jojo]

Originally posted by Ed Valvo
Tranny slipping? I once had a slipping tranny and I would run 13.30 all day long no matter what the boost was set at. Changed tranny, knocked off 1 second....

Tranny is sorta new only ran it hard at the track about 15 or so runs. I believe the tranny will slip if the converter is not locked anyway right?

thanks,,

jojo

 

[jojo]

Originally posted by Scott Atk
http://www.gnttype.org/techarea/electrical/switches.html

Got it, thanks Scott

jojo

 

[Nick Micale]

Originally posted by jojo
Ok guys consistent track runs for the past month. Every run as follows: 2 runs 13.01@105.87MPH
3 runs 13.02@105.8MPH

Really need more info about the runs to give a better opinion, like 60' times, 1/8th mile ET and speed. Ambient temp would help too.

MPH is consistant so power output is also. Timing can affect spool-up and HP so maybe that needs some adusting.

Problem is, even at the track, it is very hard to tune and max the HP to your build without lots more recorded data like from T-link or DS.

Actually, your times are pretty much in line with similar cars when they first ran at the track. With some tuning, tires, so forth, they got better. If you think it is easy to do your best first time out, sorry, usually does not happen. Little patience, tuning and few more mods will get you where you should be.

Also, do not be comparing your times with others running at or about sea level. We run at 3-4000' feet density alt. on a good night at 90 degrees or so. Las Vegas is usually even worse. Your "good air" times are solid high 12's if corrected.

 

[jojo]

Re: Re: Why cant i get my MPH up???

Originally posted by Nick Micale
Really need more info about the runs to give a better opinion, like 60' times, 1/8th mile ET and speed. Ambient temp would help too.

MPH is consistant so power output is also. Timing can affect spool-up and HP so maybe that needs some adusting.

Problem is, even at the track, it is very hard to tune and max the HP to your build without lots more recorded data like from T-link or DS.

Actually, your times are pretty much in line with similar cars when they first ran at the track. With some tuning, tires, so forth, they got better. If you think it is easy to do your best first time out, sorry, usually does not happen. Little patience, tuning and few more mods will get you where you should be.

Also, do not be comparing your times with others running at or about sea level. We run at 3-4000' feet density alt. on a good night at 90 degrees or so. Las Vegas is usually even worse. Your "good air" times are solid high 12's if corrected.

Sounds good Nick i see alot of other cars running the same MPH with those times also. My 60fts are terrible 2.1s due to the FACTUAL TRACTION PROBLEM, DUE TO THE RADIALS. I would swear i would nock of almost a second with some 28" tall slicks. My car pulls SO DAMMED HARD ITS NOT EVEN FUNNY. I took a friend of mine that ran consistent 12.8s with his modded 03 cobra for a ride, and he said i literally scared the **** out of him when i launched with boost and was sliding about 40ft down the track before my sorry tires actually grabbed. Once they grabbed i pushed him pretty good back into his seat and he just looked at me and said WOW this thing is strong. Oh and he has Nitto Drag Radials on his modded 03 Cobra. Im waiting on my Extender chip with 23/20 of timing to get here and that should help. I just cant believe im squeezing 22# of boost with a 22/19 of timing chip at this current time.

thanks,

jojo

 

[TURBOV6]

I would suggest to up the boost like 24-26lbs and with 26 degree timming. But with adequate gas like C-16.

On street trim with 20 degree timming 22lbs of boost and 100 octane (xylene mix) I trapped speeds over 110.

 

[jojo]

Update!!!


Upped the fuel pressure on the rail last night, seems maybe my gauge is a little off (2#s or so) anyway tweaked the pressure after driving it, shutting it off, starting it up again and letting it get to operating temperature to see if the fuel gauge moved a little. After a few dialins on the regulator i believe i got it where it is supposed to be 45# line off according to the extender chip specs.

Took it out for a blast on the freeway last night, from a dead stop i put the pedal into the floor board, boost needle crammed up to 23#!!!!, oh... dont worry no knock with 100 octane damn thats a lot of boost for 100 isnt it?? anyway im not complaining, just kept eyeballing all gauges with my 15 eyeballs around my head (I just got all these sets of extra eyes since ive owned my buick really ) ok......bottom line 02s went from no higher than 761 or so at the track with consistent runs up to 781 last night while RPMs slammed up to 5200+ according to the quick update readings burned into my extender chip for the Scanmaster. damn my car pulls so freakin hard at this time, im scaring myself. Next step is to lose the radials for the street and throw on some BFG drags which ill be doing here probably within the next couple of weeks. Oh and by the way does anyones check engine light come on from keeping the car in third gear and winding out that motor up to 5200+ rpms for too long. Mine does, but instantly goes away when i throw it into overdrive right at the end of the quarter run.

jojo

 

[TurboDave]

Originally posted by jojo
Update!!!


Upped the fuel pressure on the rail last night, seems maybe my gauge is a little off (2#s or so) anyway tweaked the pressure after driving it, shutting it off, starting it up again and letting it get to operating temperature to see if the fuel gauge moved a little. After a few dialins on the regulator i believe i got it where it is supposed to be 45# line off according to the extender chip specs.

Took it out for a blast on the freeway last night, from a dead stop i put the pedal into the floor board, boost needle crammed up to 23#!!!!, oh... dont worry no knock with 100 octane damn thats a lot of boost for 100 isnt it?? anyway im not complaining, just kept eyeballing all gauges with my 15 eyeballs around my head (I just got all these sets of extra eyes since ive owned my buick really ) ok......bottom line 02s went from no higher than 761 or so at the track with consistent runs up to 781 last night while RPMs slammed up to 5200+ according to the quick update readings burned into my extender chip for the Scanmaster. damn my car pulls so freakin hard at this time, im scaring myself. Next step is to lose the radials for the street and throw on some BFG drags which ill be doing here probably within the next couple of weeks. Oh and by the way does anyones check engine light come on from keeping the car in third gear and winding out that motor up to 5200+ rpms for too long. Mine does, but instantly goes away when i throw it into overdrive right at the end of the quarter run.

jojo

That flashing SES light that you're seeing is the built in "shift light" that's in the Extender
BTW, it's adjustable!!