E7, stock cam, HUGE mph - Ford Mustang Forums : Corral.net Mustang Forum
 
LinkBack Thread Tools Display Modes
post #1 of 18 Old 10-06-2008, 11:46 AM Thread Starter
Registered User
 
Brian47's Avatar
 
Trader Feedback: (6)
Join Date: Dec 2003
Location: Meriden, CT
Posts: 1,851
E7, stock cam, HUGE mph

Alright heres the scenario. The motor in my car is a stock bottom end, stock cam, unported E7s with GT40 valves and a valve job, 1.7 rockers, Cobra intake, 65mm TB, 75mm MAF, CAI, pulleys, Long tubes, x pipe, dumped spintechs, 3.73s, stock tranny, saleen springs on a stock suspension. Car dynoed a reasonable 258 rwhp 295 rwtq.

On 18" falken street radials its best was a 12.95 @ 106.0 mph. At the last race a few months ago the car was going low 13s but trapping 109 (best of 109.27). This past weekend I borrowed some Drag Radials to see what it would do.

First Pass: 18 psi, spun hard and in 2nd gear. 2.20 60' on the way to a 13.30 @ 107.4.

Second Pass: 18 psi, spun less but again in 2nd gear. 1.95 60' on the way to a 12.93 @ 107.6.

Last Pass: 16 psi, spun slightly less but again in 2nd gear. 1.93 60' on the way to a 12.87 @ 111.5.

Im wondering where that 111.5 came from. The car felt good, but nothing special in the SOTP department. It didnt feel stronger than my 109 mph passes, and even trapped a weaker 1/8th mph. I feel like this was just a fluke and the numbers all say it was. I hate knowing it was probably the timers at the track that messed up. The car weighed 3130 with me in it, no pass or back seat (sold them). 258 rwhp and 3130 do not come out to 111.5 mph any way you cut it. Even the 109 mph amazed me.

Any input, is the car a freak, or is the track in need of new timing equipment .


89 LX: Stock cam, E7s, Cobra intake, 3.73s and bolt ons... BESTS
12.56 et 107.4 mph: slicks, 12.53 et 108.2 mph: 17" ET Streets, 12.87 et 111.5 mph: 17" DRs, 12.95 et 109.2 mph: 18" radials
Brian47 is offline  
Sponsored Links
Advertisement
 
post #2 of 18 Old 10-06-2008, 12:06 PM
Registered User
 
Trader Feedback: (6)
Join Date: Dec 2007
Location: WI
Posts: 460
you were spinning at 2nd or launching at 2nd?

forbanger is offline  
post #3 of 18 Old 10-06-2008, 12:51 PM Thread Starter
Registered User
 
Brian47's Avatar
 
Trader Feedback: (6)
Join Date: Dec 2003
Location: Meriden, CT
Posts: 1,851
Spinning when I hit 2nd. I should have some video of the passes which I will post. I had that issue on the street tires, and hoped the DRs would solve it. Needless to say it was almost worse on the DRs. Im glad I have a 31 spline set up going in this winter. Then I can run my 17" ET Streets.

89 LX: Stock cam, E7s, Cobra intake, 3.73s and bolt ons... BESTS
12.56 et 107.4 mph: slicks, 12.53 et 108.2 mph: 17" ET Streets, 12.87 et 111.5 mph: 17" DRs, 12.95 et 109.2 mph: 18" radials
Brian47 is offline  
Sponsored Links
Advertisement
 
post #4 of 18 Old 10-06-2008, 08:20 PM
Registered User
 
stanglx's Avatar
 
Trader Feedback: (0)
Join Date: Jul 2002
Location: East Taunton MA
Posts: 351
It must have been the 50 shot you were spraying!!!

New Combo: Coyote swap. NMRA Coyote Stock wannabe! [email protected] so far!
stanglx is offline  
post #5 of 18 Old 10-06-2008, 09:57 PM
Registered User
 
Trader Feedback: (6)
Join Date: Feb 2004
Location: Buford, GA
Posts: 1,803
I think it would be a timing fluke.

With even less tire psi, you should have trapped under the original times (all things consistent)
streetfalcon is offline  
post #6 of 18 Old 10-07-2008, 01:12 AM Thread Starter
Registered User
 
Brian47's Avatar
 
Trader Feedback: (6)
Join Date: Dec 2003
Location: Meriden, CT
Posts: 1,851
Thats my guess, now what do I tell people... that was my best Drag Radial pass, so I have No other mph to work with for that particular run...

Oh well, one more race on ET Streets!

89 LX: Stock cam, E7s, Cobra intake, 3.73s and bolt ons... BESTS
12.56 et 107.4 mph: slicks, 12.53 et 108.2 mph: 17" ET Streets, 12.87 et 111.5 mph: 17" DRs, 12.95 et 109.2 mph: 18" radials
Brian47 is offline  
post #7 of 18 Old 10-07-2008, 01:12 AM Thread Starter
Registered User
 
Brian47's Avatar
 
Trader Feedback: (6)
Join Date: Dec 2003
Location: Meriden, CT
Posts: 1,851
http://videos.streetfire.net/video/t...008_189719.htm

The first pass is my 12.9 and you can hear it spin hard into 2nd.

89 LX: Stock cam, E7s, Cobra intake, 3.73s and bolt ons... BESTS
12.56 et 107.4 mph: slicks, 12.53 et 108.2 mph: 17" ET Streets, 12.87 et 111.5 mph: 17" DRs, 12.95 et 109.2 mph: 18" radials
Brian47 is offline  
post #8 of 18 Old 10-07-2008, 08:00 AM
Registered User
 
swinerton's Avatar
 
Trader Feedback: (15)
Join Date: May 2000
Location: bradford, NH, USA
Posts: 7,142
I have heard of gusts of wind picking up on the tail section, pushing cars 3-5mph faster near the end of the 1320. Also, any chance motor could have went lean after the 660'???

Cory Swinerton
2013 Boss 302 #540 712rwhp/592rwtq (SOLD)
1999 GT 2V 775rwhp Ysi, Boss 304". (SOLD)
Quote:
Originally Posted by WhiteLX408 View Post
Running street tires at the track is like wiping your ass with a turd.
swinerton is offline  
post #9 of 18 Old 10-07-2008, 08:36 AM Thread Starter
Registered User
 
Brian47's Avatar
 
Trader Feedback: (6)
Join Date: Dec 2003
Location: Meriden, CT
Posts: 1,851
There could have been a wind thing, could have gone lean, could have been anything, I'm unsure. What gets me is the fact the car picked up 26 mph on the big end, where it normally gains 22-23. Now when we look at how much faster it went from the 1/8th to the 1/4 time wise vs mph wise it doesnt even out.

I'm chalking it up to a timing thing with the clocks, but what do I say about my best mph. Stick with 109.27 or tell people its been 111.52?

Either way the mph doesnt matter as much as the times!

89 LX: Stock cam, E7s, Cobra intake, 3.73s and bolt ons... BESTS
12.56 et 107.4 mph: slicks, 12.53 et 108.2 mph: 17" ET Streets, 12.87 et 111.5 mph: 17" DRs, 12.95 et 109.2 mph: 18" radials
Brian47 is offline  
post #10 of 18 Old 10-07-2008, 08:53 AM
Registered User
 
swinerton's Avatar
 
Trader Feedback: (15)
Join Date: May 2000
Location: bradford, NH, USA
Posts: 7,142
My bud runs 117mph through the 1320 consistant. The last past he made a few weeks ago, was a strange 122mph. This was right after two previous 117mph runs, no more than 40 minutes before. I say he went lean, but he says he's still happy with that trap speed. I say he should be careful next time he brings it to the track!


Cory Swinerton
2013 Boss 302 #540 712rwhp/592rwtq (SOLD)
1999 GT 2V 775rwhp Ysi, Boss 304". (SOLD)
Quote:
Originally Posted by WhiteLX408 View Post
Running street tires at the track is like wiping your ass with a turd.
swinerton is offline  
post #11 of 18 Old 10-09-2008, 10:20 PM
Registered User
 
06VistGT's Avatar
 
Trader Feedback: (0)
Join Date: Jan 2007
Location: Kensington, CT
Posts: 199
The slip says 111.5 mph - 'nough said.

If it was unreasonable (think my 188 mph 1/8th trap speed in the '06), then you could call it a timing error. In this case, you only improved 2 mph. The air was better than last time, when you went 109 a few times. I had my best trap speed. Ken broke into the 11s for the first time.

Be happy - so long as a lean condition isn't hurting the motor.

2006 Vista Blue GT
13.74 @ 99.3
1986 Blue GT
11.708 @ 115.39 :: 1.54 60'
06VistGT is offline  
post #12 of 18 Old 10-10-2008, 08:23 AM Thread Starter
Registered User
 
Brian47's Avatar
 
Trader Feedback: (6)
Join Date: Dec 2003
Location: Meriden, CT
Posts: 1,851
If it was the case of the lean condition, how do I get this to happen more often...

The slip does say it, and if anyone asks Ill explain them the situation. The 109 mph wasnt any fluke, so I guess I can use that.

89 LX: Stock cam, E7s, Cobra intake, 3.73s and bolt ons... BESTS
12.56 et 107.4 mph: slicks, 12.53 et 108.2 mph: 17" ET Streets, 12.87 et 111.5 mph: 17" DRs, 12.95 et 109.2 mph: 18" radials
Brian47 is offline  
post #13 of 18 Old 10-10-2008, 04:35 PM
Registered User
 
4xFSChamp's Avatar
 
Trader Feedback: (13)
Join Date: Jan 2002
Location: Maryland
Posts: 612
It could have been the way your car tripped the beams or a timing error. I doubt your car randomly went lean, you have a mass air right? If so it will correct it. I run on tracks all over the country and I'm within 1mph 99% of the time. Some tracks certain cars will trip the beams in a different lane. Kind of odd but it does happen. Run it again and see what she does. And I see some Enormus mph with E7's

4x NMRA FACTORY STOCK CHAMP:07-10:'07 NMRA ROOKIE OF THE YEAR
RGR 311ci w/Holley Heads N/A 9.60 @ 138+mph
www.facebook.com/4xmotorsports
4xFSChamp is offline  
post #14 of 18 Old 10-11-2008, 12:36 PM Thread Starter
Registered User
 
Brian47's Avatar
 
Trader Feedback: (6)
Join Date: Dec 2003
Location: Meriden, CT
Posts: 1,851
Yeah you guys do see big mph, but Im sure you have more money, effort and time into your heads than I do into my whole drivetrain .

The car last time out was going 108.9 - 109.2 and earlier in the same day as the 111 was going 107.3 - 107.4 ( I figure the 107 vs 109 is from the 18 psi in the DRs vs the 35 psi in the street tires).

89 LX: Stock cam, E7s, Cobra intake, 3.73s and bolt ons... BESTS
12.56 et 107.4 mph: slicks, 12.53 et 108.2 mph: 17" ET Streets, 12.87 et 111.5 mph: 17" DRs, 12.95 et 109.2 mph: 18" radials
Brian47 is offline  
post #15 of 18 Old 10-11-2008, 10:50 PM
Registered User
 
Trader Feedback: (0)
Join Date: Oct 2003
Location: canada
Posts: 197
a quick look at your RPM when you crossed the line will tell the truth
capri302 is offline  
post #16 of 18 Old 10-12-2008, 01:58 AM
Registered User
 
poorracerkid's Avatar
 
Trader Feedback: (4)
Join Date: Mar 2005
Location: Ft Worth
Posts: 1,596
Quote:
Originally Posted by [email protected] View Post
It could have been the way your car tripped the beams or a timing error. I doubt your car randomly went lean, you have a mass air right? If so it will correct it. I run on tracks all over the country and I'm within 1mph 99% of the time. Some tracks certain cars will trip the beams in a different lane. Kind of odd but it does happen. Run it again and see what she does. And I see some Enormus mph with E7's
Depends on the MAF. The tolerances are not that good.

All bleeding stops eventually.
poorracerkid is offline  
post #17 of 18 Old 10-12-2008, 02:45 PM
Registered User
 
Trader Feedback: (1)
Join Date: Mar 2001
Location: spring,tx
Posts: 660
What was the 1/8 mile mph on each of those passes?

"My sig is not approved for consumer use."
gt350 mustang is offline  
post #18 of 18 Old 10-13-2008, 09:10 AM Thread Starter
Registered User
 
Brian47's Avatar
 
Trader Feedback: (6)
Join Date: Dec 2003
Location: Meriden, CT
Posts: 1,851
Quote:
Originally Posted by capri302 View Post
a quick look at your RPM when you crossed the line will tell the truth
I usually know around where the RPM is, and on this pass it was higher than the previous couple that day. Not sure compared with the 109 mph passes. I only have the stock Tach and its 1000 RPM off as seen on the dyno.

The 1/8 I dont have in front of me, but I think it was a mph difference between the 107 mph runs, which is another reason I think fluke. Huge tailwind might be true, but Im not sure.

Etown on some ET Streets will be the next race, so I will be praying for another 110-111 mph run .

89 LX: Stock cam, E7s, Cobra intake, 3.73s and bolt ons... BESTS
12.56 et 107.4 mph: slicks, 12.53 et 108.2 mph: 17" ET Streets, 12.87 et 111.5 mph: 17" DRs, 12.95 et 109.2 mph: 18" radials
Brian47 is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forums : Corral.net Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome