|
Author
|
Topic: Heading to the dyno with my 03 Cobra...
|
Jeff S
¯
Member # 371
|
posted
 
 
I'm on my way to go tune my 03 Cobra. My mods are K&N CAI, Bassani cat-back and a 3.10 pulley. Any guesses as to what it will make?
--------------------
'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
| :
|
|
|
|
Glenn
¯
Member # 520
|
posted
415
--------------------
S-Trim,331,H/C/I
"JohnB groupie train"
My Car
DragGuam
Posts: 2009 | From: Stationed on a Pacific Island, Guam | Registered: Oct 2001
| :
|
|
1992gtdrop
unregistered
|
posted
435hp
:
|
|
TRIXSNK
¯
Member # 2844
|
posted
420 ![[dance]](graemlins/dance.gif)
--------------------
9 Sec EVO 9 is GONE!
New project in the works.......
Posts: 3740 | From: Bay Area | Registered: May 2003
| :
|
|
Hungry Hippo
¯
Member # 537
|
posted
440/435
[ November 23, 2004, 02:32 PM: Message edited by: HungryHippo ]
--------------------
05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
| :
|
|
Jeff S
¯
Member # 371
|
posted
Well here are the results. This graph shows my previous stock-pulley/no-tune numbers overlaid with todays numbers using the 3.10 pulley and tune:
I'm not sure if i'm getting belt slip(my stock boost guage stays pegged) or spark blowout(plugs are gapped at .035) but something isn't quite right at 5700+rpms. I also thought i'd see more torque with this pulley.
My rear end is making all kinds of popping sounds so i'll be taking it to the dealership asap. Once fixed i'm gonna hit the dyno again with my 2.76 pulley and see what a difference that will make.
[ November 23, 2004, 05:16 PM: Message edited by: Jeff S ]
--------------------
'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
| :
|
|
2stangs69-91
¯
Member # 1951
|
posted
heck why take it a dyno 2 guy's guessed with in 1 to 5 hp ![[Eek!]](eek.gif)
--------------------
69 Mustang on hold
1991 LX hatch getting a make over
1994 F150 4X4 351
2006 Yamaha V-max 1200 Modded
Posts: 3711 | From: Redding | Registered: Oct 2002
| :
|
|
Jeff S
¯
Member # 371
|
posted
quote:
Originally posted by 2stangs69-91:
heck why take it a dyno 2 guy's guessed with in 1 to 5 hp
We have some good guessers on this board don't we. ![[Big Grin]](biggrin.gif)
--------------------
'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
| :
|
|
mtbaughs
Road Racer
Member # 4052
|
posted
Did you change the stock plugs to NGK TR-6's or autolite 103's? Your gaps fine. I've seen the stock ignition handle tons of boost so I doubt your blowing out the spark. If not you might want to try the plug change for the top end stumble your getting and see if that solves it for ya. Other than that are you running a larger idler pulley kit/shorter belt length? Belt slip isn't always seen on the boost gauge. Good numbers Jeff.
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
| :
|
|
Jeff S
¯
Member # 371
|
posted
quote:
Originally posted by mtbaughs:
Did you change the stock plugs to NGK TR-6's or autolite 103's? Your gaps fine. I've seen the stock ignition handle tons of boost so I doubt your blowing out the spark. If not you might want to try the plug change for the top end stumble your getting and see if that solves it for ya. Other than that are you running a larger idler pulley kit/shorter belt length? Belt slip isn't always seen on the boost gauge. Good numbers Jeff.
Yes i'm running the TR-6's and a 100mm idler with 74.5" belt. I'm thinking it has to be belt slip at this point but not sure if I can fit a smaller belt on there. The 74.5 and 100mm idler seem to work for everyone else. ![[Confused]](confused.gif)
--------------------
'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
| :
|
|
BlueOvalRacing
¯
Member # 1531
|
posted
You should put the stock pulley back on your car before you bring it in for rear end work. Trust me, Ford is getting pissy about modifications.
Posts: 1159 | From: Pioneer | Registered: Jul 2002
| :
|
|
mtbaughs
Road Racer
Member # 4052
|
posted
quote:
Originally posted by BlueOvalRacing:
You should put the stock pulley back on your car before you bring it in for rear end work. Trust me, Ford is getting pissy about modifications.
EXACTLY
Also when you installed the pulley did you install it dry or did you use anti-seize or other lube on the shaft or pulley? If you did this can allow the pulley to spin on the shaft under boost. I've seen it happen many times from that.
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
| :
|
|
Jeff S
¯
Member # 371
|
posted
quote:
Originally posted by mtbaughs:
quote:
Originally posted by BlueOvalRacing:
You should put the stock pulley back on your car before you bring it in for rear end work. Trust me, Ford is getting pissy about modifications.
EXACTLY
Also when you installed the pulley did you install it dry or did you use anti-seize or other lube on the shaft or pulley? If you did this can allow the pulley to spin on the shaft under boost. I've seen it happen many times from that.
Actually I did use anti-sieze butI thought about that while on the dyno so I made a line with whiteout and it wasn't spinning. I'm gonna change to some AR103 plugs and try to fit a smaller belt on it and see what happens.
--------------------
'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
| :
|
|
BlackNGold
CaliforniaFords.com
Moderator
Member # 655
|
posted
It looks like you quite a bit leaner at 5700 compared to the previous pulley combo...Do you think it's a fuel problem?...
I wonder what is "popping" in the rearend too....
--------------------
-SLOWER TRAFFIC KEEP RIGHT-
Posts: 5132 | From: Bay Area, CA | Registered: Dec 2001
| :
|
|
Jeff S
¯
Member # 371
|
posted
quote:
Originally posted by BlackNGold:
It looks like you quite a bit leaner at 5700 compared to the previous pulley combo...Do you think it's a fuel problem?...
I wonder what is "popping" in the rearend too....
The "red" run on the graph is the factory tune using the stock pulley which is too lean down low and too rich up top. My AF is perfect.
[ November 25, 2004, 10:42 AM: Message edited by: Jeff S ]
--------------------
'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
| :
|
|
TRIXSNK
¯
Member # 2844
|
posted
Doesn't it seem as though what the problem could be is that if somethiing went in the rear-end on the dyno could that in theory ruin the continuity from driveline to wheels to dyno drum.....causing a strange almost loss of traction at the high end.
Has anyone a dyno graph of a car losing traction on a dyno? Does it look similar?
Either that or i would think belt slip.....do you see any belt dust in the engiine bay at all??
--------------------
9 Sec EVO 9 is GONE!
New project in the works.......
Posts: 3740 | From: Bay Area | Registered: May 2003
| :
|
|
|
|
Jeff S
¯
Member # 371
|
posted
quote:
Originally posted by mtbaughs:
Have you done this mod yet? http://www.rpmoutlet.com/boost%20bypassc.htm
Nope, but I have it disabled in my tune.
--------------------
'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
| :
|
|
Jeff S
¯
Member # 371
|
posted
quote:
Originally posted by TRIXSNK:
Doesn't it seem as though what the problem could be is that if somethiing went in the rear-end on the dyno could that in theory ruin the continuity from driveline to wheels to dyno drum.....causing a strange almost loss of traction at the high end.
Has anyone a dyno graph of a car losing traction on a dyno? Does it look similar?
Either that or i would think belt slip.....do you see any belt dust in the engiine bay at all??
I sure hope so, I guess i'll find out in a week or so. I haven't noticed any belt dust, but i've only put maybe 20 miles on it and a few dyno pulls.
--------------------
'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
| :
|
|
TRIXSNK
¯
Member # 2844
|
posted
By the way what brand belt are you running?
I've heard bad about certain brands but have no personal experience as of yet.
Gatorback?
--------------------
9 Sec EVO 9 is GONE!
New project in the works.......
Posts: 3740 | From: Bay Area | Registered: May 2003
| :
|
|
Jeff S
¯
Member # 371
|
posted
Gates.
--------------------
'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
| :
|
|
sharkattack
¯
Member # 645
|
posted
Hey Jeff, thanks of the CAI. Saved me some time and cash. Bolted it on today and it is running like a champ
Hope you get your rear end problem worked out.
--------------------
1965 Fastback
03 Cobra with some stuff
Posts: 935 | From: Oakley Ca | Registered: Dec 2001
| :
|
|
getjobdone
¯
Member # 4666
|
posted
quote:
Originally posted by TRIXSNK:
Doesn't it seem as though what the problem could be is that if somethiing went in the rear-end on the dyno could that in theory ruin the continuity from driveline to wheels to dyno drum.....causing a strange almost loss of traction at the high end.
Has anyone a dyno graph of a car losing traction on a dyno? Does it look similar?
Either that or i would think belt slip.....do you see any belt dust in the engiine bay at all??
i have. the car isnt losing traction. if it were there would be a massive drop and then a little loop in the graph.
--------------------
91 notch ^ blown h/c/i
Posts: 677 | From: east bay,ca | Registered: Jul 2004
| :
|
|
TRIXSNK
¯
Member # 2844
|
posted
Any updates?
--------------------
9 Sec EVO 9 is GONE!
New project in the works.......
Posts: 3740 | From: Bay Area | Registered: May 2003
| :
|
|
Email this post to someone!
Printer friendly view of this Ford topic
![[Whoo Whooooo!]](graemlins/woowoo.gif)
