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Author
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Topic: E cam shift point???
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DropTopFox
drama
Member # 1689
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posted
 
 
Hey guys I'm new at driving a stick. I just bought 66 AC Cobra's sweet vert. Has a Bennett Racing built 306 in it with 10:1 compression and an E-cam. Has stock heads and intake ported. I know the shift point with a stock cam is usually about 5500 RPM. That is what I have the shift light set at right now. Is that where I should leave it or should I change the shift point to something else because it'll be a while before I get to the dyno to be able to really tell. Thanks
Ryan ![[patriot]](graemlins/patriot.gif)
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Go out and do something for yourself today everyone, quit depending on others
-Me
http://www.CaliforniaFords.com/cgi-bin/album.pl?album=00001689
Posts: 4003 | From: San Bruno | Registered: Aug 2002
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88gt
Custom
Member # 579
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posted
I'm not sure where you should be shifting with that combo and cam...its hard to tell for sure without track testing. Also, who knows how much those heads and intake were really ported. That'll factor in.
Also, I'd argue that a stock motor might benefit from shifting a little lower than 5500.
Posts: 1482 | From: Santa Clara/Bay area | Registered: Nov 2001
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
its kinda hard to say considering each car and engine set-up is a tad different. You just kinda have to be able to find where your car stops pulling and runs best by getting time behind the wheel and getting numbers at the track. I know a few guys shift by the meter or there ass (i did it for a little while) just drive your car and learn how it reponds would be my best advice, I am sure there are plenty other guys that will tell you different.
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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KCmustangboy
¯
Member # 1927
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posted
make 2 passes at 5500, 2 at 5600, 2 at 5700...ect ect... look at the mph go up and ET go down, when ET starts taking a crap your shifting too late. This has always worked for me. Besides that drive the hell out of the car and you should "feel" when your pushing too far. Better to shift early then late ![[Eek!]](eek.gif)
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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DropTopFox
drama
Member # 1689
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posted
Yeah only problem is without a roll bar, retractible seat belts, a tiny oil leak, and the battery not being held down I won't pass tech. I need to get a lot of things done before this car sees the track. However when I'm practicing around here where should I learn to shift at? I know someone has to know the perscribed shift point for the E-cam.
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Go out and do something for yourself today everyone, quit depending on others
-Me
http://www.CaliforniaFords.com/cgi-bin/album.pl?album=00001689
Posts: 4003 | From: San Bruno | Registered: Aug 2002
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
quote:
Originally posted by DropTopFox:
Yeah only problem is without a roll bar, retractible seat belts, a tiny oil leak, and the battery not being held down I won't pass tech. I need to get a lot of things done before this car sees the track. However when I'm practicing around here where should I learn to shift at? I know someone has to know the perscribed shift point for the E-cam.
Roll Bar???????? you go 11's in that car?
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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jayl
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Member # 185
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posted
no its 13.99 and faster for a rollbar in verts!
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Facebook.com/TeamTemporary
8.5's TTFBitch!
Posts: 3821 | From: Hayward | Registered: Mar 2001
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
quote:
Originally posted by jayl:
no its 13.99 and faster for a rollbar in verts!
are you shitting me!!!!
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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jayl
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Member # 185
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posted
no haha! sucks ass!! its not enforced that hard when running high 13s or so ive seen.........but thats a lot of added weight and cash for a 13 second car!!
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Facebook.com/TeamTemporary
8.5's TTFBitch!
Posts: 3821 | From: Hayward | Registered: Mar 2001
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
quote:
Originally posted by jayl:
no haha! sucks ass!! its not enforced that hard when running high 13s or so ive seen.........but thats a lot of added weight and cash for a 13 second car!!
Yeah no kidding!!! and doesn't have to be beffeir then a hard top roll bar(more points?)
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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BlackNGold
CaliforniaFords.com
Moderator
Member # 655
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posted
quote:
Originally posted by KCmustangboy:
make 2 passes at 5500, 2 at 5600, 2 at 5700...ect ect... look at the mph go up and ET go down, when ET starts taking a crap your shifting too late. This has always worked for me. Besides that drive the hell out of the car and you should "feel" when your pushing too far. Better to shift early then late
Good advise!..
Are the stock heads ported?...Shift point doesnt really have to do with the cam completely....It also depends on how the rest of the motor flows(heads & intake/exhaust)...
You can also dyno the motor for about $60 and find out specifically where you power band is...
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-SLOWER TRAFFIC KEEP RIGHT-
Posts: 5132 | From: Bay Area, CA | Registered: Dec 2001
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66 AC COBRA
Nitrous King
Member # 904
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posted
upper intake is cleaned up, lower intake is ported as much as possible without doing any welding, heads are worked a little on the intake and a little more aggressive on the exhaust
i wouldnt rev to high because the heads have the stock springs and rockers, when i drove the old hatch that motor was in, it liked about 5600-5700, but shifting that high very aggressively and those 275 street tires just melt off, i would say just shit at 5500, learn to drive the car a little better without just killing the tires, then raise the shift points once u have some stickier tires to hold the gears and added torque, have fun and just replace the copper washer on the drain plug and that will sove the leak, thats the only place that oil was comin from when i had it
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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mustanggt5091
All I need is.....
Member # 444
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posted
I would agree with the 5500 shift point for now. ![[Big Grin]](biggrin.gif)
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88 GT 357w (SOLD):(
06 Limited Edition R6 !!!!!
Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001
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Yellow94GT
Mr. 60 FT
Member # 431
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posted
1-2 5800, 2-3 5600, 3-4 5400
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AED
1994 GT Bucket that will likely never run
1999 SLOLEEN Twin Turbo Coyote
2008 F250 580 RWHP 1129 RWTQ
Posts: 5990 | From: Cameron Park, Ca | Registered: Sep 2001
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Bill/APEX Motorsports
¯
Member # 636
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posted
Why not bring it down and dyno it on our Dynojet? You'll get a printout that will show you exactly where your peak hp and torque are, as well as your air/fuel ratio. Then you'll know where you should be shifting, no guesses! Give me a call if you'd like to schedule something.
![[burnout]](graemlins/burnout.gif)
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Bill Kaiser
APEX Motorsports
Santa Clara
www.apexmotorsports.com
408-562-1000
bill@apexmotorsports.com
Posts: 488 | From: Santa Clara, CA | Registered: Dec 2001
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DropTopFox
drama
Member # 1689
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posted
Ok, I think I'll just leave it at 5500 for now. Yeah I have to have a roll bar ![[Roll Eyes]](rolleyes.gif) and trust me the car is that fast where I think I could get lucky and run a mid 13 and if I let Drew take a stab at it possible low 13's. Thanks for the offer Bill, it's gonna be a little while longer before I throw it on the dyno. I still want to get pullies and an electric fan and a 76mm Pro-m then I'm going to have Byron chip it and tune it either at your place or at Mustang Ranch depending on when I'm availible to do so. Thanks for the help guys.
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Go out and do something for yourself today everyone, quit depending on others
-Me
http://www.CaliforniaFords.com/cgi-bin/album.pl?album=00001689
Posts: 4003 | From: San Bruno | Registered: Aug 2002
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ci$ko
¯
Member # 2425
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posted
did he sell it to you with the charger?
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2000 GT for sale
89 lx burning up slicks at a track near you
91 bottled gt sold :/
72 chevelle
Posts: 1286 | From: valleJo .7o7. | Registered: Feb 2003
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