Results 201 to 220 of 402
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03-21-2017 #201
Hi Andrew - running almost 29" rear tires (Nitto 305 45 18 drag radials) I chose the 4.10 for several reasons. I had it all broken down in an earlier post but pasted it below again. Bottom line is our 4000 lbs cars like a launch factor of between 10-11 for the least amount of spin/bog plus at my shift point of around 6000 RPM the #s work great for 1/8 mile and 1/4 mile to be in a good RPM range when I cross the traps. Last is the hwy RPMs as shown. Honestly I'm not worried about the driveshaft RPM as long as there's no vibration. Driveshaft comes with the American Powertrain kit with the 6 speed and seems like a high end piece so I would be really surprised if there are any issues. I will certainly update on this thread if so with all results good or bad.
Here's what the #s will look like with the new trans and rear:
Magnum TR6060 6 speed (2.66, 1.78,1.30,1.00, .8, .63)
W: 4.10 gears & 305/45/18 Nitto DRs:
{28.78” tire}
1st = 4.10*2.66= 10.91 launch multiplier/ 2nd =4.10* 1.78 = 7.30 /3rd =4.10*1.30=5.33 4th =4.10*1.00=4.10
Shift points:
1-2 47 mph 6000 RPM (RPM drop to 4000 67%)
2-3 70 mph 6000 RPM (RPM drop to 4400 73%)
3-4 96 mph 1/8th mile 6000 RPM (RPM drop to 4600 77%)
Cross traps for 1/4 mile at approx.: 117 mph = 5600 RPM (in 4th gear) w/current motor
125 mph =6000 RPM (in 4th gear) - room to grow (future stroker motor 650/650)
POWER RANGE = 4000 – 6000 (2000 RPM Power band)
2300 RPM = 60 MPH in 5th and 76 mph in 6th
65 mph in 5th gear @ 2500 RPM (W/28.78”)
70 mph in 6th gear @ 2100 RPM (W/28.78”)
75 mph in 6th gear @ 2263 RPM (W/28.78”)
80 mph in 6th gear @ 2413 RPM (W/28.78”)
150 mph in 6th gear @ 4525 RPM (W/28.78”)Joe Lincoln
Lime Green 71 Olds 442 Convertible
Upgrades thread: https://www.pro-touring.com/showthre...ible&highlight=
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03-27-2017 #202Lee 800 steering box and new chassis brace are on:
Joe Lincoln
Lime Green 71 Olds 442 Convertible
Upgrades thread: https://www.pro-touring.com/showthre...ible&highlight=
04-10-2017 #203AFX spindles, steering arms, upper control arms, and GT rotors are installed:
Joe Lincoln
Lime Green 71 Olds 442 Convertible
Upgrades thread: https://www.pro-touring.com/showthre...ible&highlight=
04-30-2017 #204Finally a little progress - 6 speed install is coming along - slowly but surely:
Oil cooler is installed:
Got the old Hooker SC 1 7/8 headers coated:
Switching back to my Holley 830 carb from the 770 street avenger:
Joe Lincoln
Lime Green 71 Olds 442 Convertible
Upgrades thread: https://www.pro-touring.com/showthre...ible&highlight=
05-11-2017 #205Registered User- Join Date
- Apr 2017
- Location
- TX
- Posts
- 138
Very nice car and build thread here. I appreciate your wheel and tire help in my thread.
Dan
05-12-2017 #206Thanks Dan - right back at you and glad to help!
-JoeJoe Lincoln
Lime Green 71 Olds 442 Convertible
Upgrades thread: https://www.pro-touring.com/showthre...ible&highlight=
06-11-2017 #207Haven't posted in a while - almost ready to buy and try the "442" shifter handle. The nice thing is the Magnum 6 speed that came from American Powertrain lines up really close to fit the stock 4 speed console pretty well - at least from the "eye ball" test at this point. We'll see how much "tweaking" is needed when we get that far along.
One of the latest challenges have been with the new hydraulic clutch setup - mostly because of my clutch pedal. Long story but once the hydraulic clutch was set up to spec per American Powertrain, the clutch pedal was way too hard. Apparently the spec for a stock 68-72 GM A body didn't work for my car. But....it turns out I may not have a "stock" clutch pedal. At any rate after lots of tweaking I think it's finally dialed in as it should be.
The other issue is the oil cooler. The oil filter relocater had to be moved from being horizontal to vertical - with it horizontal it wouldn't catch the oil from the filter. With it vertical it will catch the oil and not make a huge mess!!
Hoping to start on the roll bar next week - huge custom project for it with my shoulder harness belts and everything else on my "wish list" that I mocked up with the pvc pipes. Frank and team have their work cut out for them on this project. - will add pics when I have some.Joe Lincoln
Lime Green 71 Olds 442 Convertible
Upgrades thread: https://www.pro-touring.com/showthre...ible&highlight=
06-11-2017 #208Registered User- Join Date
- Aug 2004
- Posts
- 434