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Author
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Topic: went racing with the motor I built
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goldenbob
Journeyman Posts: 87
From: medford, or., United States
Registered: Jun 2002
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posted 06-26-2004 01:35 PM
  
Went racing friday night (smoked the shadetree locals with street tires) need some help...here is one of my slips:+.225-----Reaction
2.022----60 ft (tires spinning 1st and 2nd)
no data---330 ft
8.296-----1/8 mile ET
86.20-----1/8 mile MPH
10.779----1000 ft
12.867----1/4 ET (my personal best!)
107.40----1/4 MPH
My Signature shows the car specs, 60 ft times are awful and before you tell me to get some slicks or "cheeters", I should let you know I would like to "best" my times with the street tires for now (275/50x17 nitto extreem drag radials, pretty soft for radials). I see guys with posts here with 1.5-1.7 60 ft times with "street" tires here all the time...Couldn't have got this far without all your help...any tips are appreciated...Robert
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67 coupe (my first car in '78)
10:1 302, 4spd, 9" (TrueTrac)posi 4.11
windsor jr heads*
*(mild cleanup)
solid roller .560 lift 228 duration
crane roller rockers
performer rpm (match ported)
holley 650dp with proform main body (built like an hp)
hooker super comp.
full msd
CE 90/10 front shocks Rancho adj. Rear
CalTracs
275/50x17 nitto extreem drag radial
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Fastymz
Moderator Posts: 19583
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 06-26-2004 01:40 PM
Great times, I'd try leaving alittle softer at lower rpm. ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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goldenbob
Journeyman Posts: 87
From: medford, or., United States
Registered: Jun 2002
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posted 06-26-2004 01:48 PM
thanks Scoop...I'm leaving at 4000rpm with 100 lbs of tool box in the trunk. If I leave at 3900 the car grips and jerks a little but the 60ft is still in the 2.0-2.1 range...
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Fastymz
Moderator Posts: 19583
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 06-26-2004 01:57 PM
Does the car leave with the front end up, is the rear up too ?What pressure do you run in the tires ? Do you get wheel hop at lower RPM's? I'd think with those tires you should be able to get your 60's down to 1.80's or better. ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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goldenbob
Journeyman Posts: 87
From: medford, or., United States
Registered: Jun 2002
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posted 06-26-2004 04:12 PM
I've never seen pics of the car leaving but the front end lifts some (CE 90/10's) rear end lifts very little...20 psi in the rear tires no wheel hop at lower rpm just kind of a jerky stutter at low rpm (3900 and lower)
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Fastymz
Moderator Posts: 19583
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 06-26-2004 04:28 PM
No one knows more about this then Alex. But from what I've read, and I spend alittle time on here reading. 
You need to get the weight over the rear tire during launch. Is your battery in the trunk, front sway bar removed, what kind of rear shocks ?Read this lots of good info, https://mustangsandmore.com/ubb/Forum12/HTML/000728.html https://mustangsandmore.com/ubb/Forum12/HTML/002480.html ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
[This message has been edited by Fastymz (edited 06-26-2004).]
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steve'66
Gearhead Posts: 9104
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 06-26-2004 07:32 PM
quote:
Originally posted by goldenbob:
I see guys with posts here with 1.5-1.7 60 ft times with "street" tires here all the time...Couldn't have got this far without all your help...any tips are appreciated...Robert
Robert,
Not with street radials and your power level.  For your power on street radials, high 1.7's to low 1.8's would be good. You can get there with the usual tricks. Get the car to transfer weight to the rear tires and not hit them too hard. Sounds easy doesn't it. SteveW
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goldenbob
Journeyman Posts: 87
From: medford, or., United States
Registered: Jun 2002
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posted 06-27-2004 01:59 AM
Sounds easy (lots of things "sound" easy), at my current experience level I don't know what to do next. I know this is not "rocket science" but with a 4spd how do you make the power off the line "not hit the tires to hard" without smoking your clutch?...Scoop-
no sway bar
battery in the trunk
Rancho adjustables for rear shocks (full soft on right, one click on left) Smoke 'em off the line and in 2nd, I have to pedal it once or twice to hook 'em back up and my 60ft time goes in the gutter (face down like the ghetto child I am). Sorry, but I have to laugh once in a while...Any more suggestions... (Scoop, I'm going to read those posts now)
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n2oMike
Gearhead Posts: 2499
From: Spencer, WV
Registered: Jan 2001
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posted 06-27-2004 11:48 AM
Back when I did plenty of street racing, I always tried to race on radials. The 'chevy boys' had 400's that would blow the tires off (even with an automatic), then wheeze off on the top end. (aftermarket heads were not that common at this time on the street)I would launch around 1800 rpm by dumping the clutch as soon as the hand was dropped. The discipline was to keep it around 1/4 throttle until the tires quit spinning. (only a very short distance) After they would hook, push the throttle to the floor, but not so fast as to get the tires spinning again. Overrev it a tad in 1st (makes for less of a transition to 2nd), then make a SMOOTH shift into 2nd. After that, you just drive. The lower torque of the 302, and a practiced man at the wheel made for plenty of successful street races. With slicks on the street, things could be turned up a bit. Slicks on the track, WFO BABY!!!!! What you really need, are slicks! ET-Streets or Hoosier Quick Time Pros if they need to be DOT approved. But you need something with a soft sidewall to absorb the shock loads of the stickshift. Once you start racing with slicks, you'll be hooked! A 2-step rev limiter is also one of those must have items for a stick shift car. They allow you to launch CONSISTENTLY, without worrying about launch rpm. You can still launch at part throttle.... or WIDE OPEN, if that is what suits you. Wide Open at redline is how I get my best et. Of course, you'll find the weak links in your drivetrain. I suggest at least a 4-pinion t-loc or a Detroit Locker... and 31 spline axles for extra hard launches on slicks. Good luck! ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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Fstln69
Gearhead Posts: 550
From: Westmont,il
Registered: Jan 2003
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posted 06-27-2004 11:54 AM
Try leaving at 4000 and dont stab it just hold it till you get moving then roll your foot into it. It takes some practice but that should get it out further so it will spin less.Or just put slicks on it and Go fast.
Dennis------------------
69 fairlane 351w [email protected] in search of Body parts for 69 fairlane
66 brand x outlaw s/s
Fstln69 Pics Page
Webshots
Cardomain pics
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