Re: The good, the bad, and the ugly,update, new motor combo
[Re: EvilB1Dart]
#2718184
11/21/19 07:05 PM
11/21/19 07:05 PM
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Joined: Jan 2003
Posts: 9,996 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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OP
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Joined: Jan 2003
Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
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Well, I can't go to the 2.100 rod bearing for a stroke increase. Not for the full .275 increase anyway. It would move the rod bearing oul holes too far and thin the inside of the crank throw. So i decided to go with a 2.20 bearing and 4.315 stroke instead. Not quite what i wanted but thats life. It will be interesting to see what these changes will do for power. The cubes will be 550.5. Edit; I got lucky today. molner makes a Hemi length H beam 6.860 rod with .990 pin and bbc 2.200 rod bearing! With my 1.660 ch pistons, 1/2 of 4.315 stroke = 2.1575 it puts me at .022 in the hole. Cometic makes a .027 thick gasket to fit providing .049 piston to head. Right where i want to be! Rods are on order!
Last edited by gregsdart; 11/21/19 07:06 PM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: The good, the bad, and the ugly,update, new motor combo
[Re: gregsdart]
#2718200
11/21/19 08:04 PM
11/21/19 08:04 PM
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Joined: Dec 2007
Posts: 12,587 Great Neck,LI,new york
hemi-itis
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
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Sounds very tight Is this an "on the edge" drag engine?
HEMI-ITIS has no cure. My condition is fully BLOWN!!
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Re: The good, the bad, and the ugly,update, new motor combo
[Re: hemi-itis]
#2718371
11/22/19 12:57 PM
11/22/19 12:57 PM
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Joined: Jan 2003
Posts: 9,996 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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OP
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Joined: Jan 2003
Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
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Sounds very tight Is this an "on the edge" drag engine? This is my last effort to go a bit faster. I assume .049 is plenty of piston to head clearance for steel rods. I had no issues at .045. Compression will be 15.5 to 1. The valvetrain is where the most issues have been.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: The good, the bad, and the ugly,update, new motor combo
[Re: gregsdart]
#2718378
11/22/19 01:17 PM
11/22/19 01:17 PM
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Joined: Dec 2007
Posts: 12,587 Great Neck,LI,new york
hemi-itis
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
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Wishing you the best of luck,,GET IT!!
HEMI-ITIS has no cure. My condition is fully BLOWN!!
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Re: The good, the bad, and the ugly,update, new motor combo
[Re: hemi-itis]
#2719512
11/26/19 04:33 PM
11/26/19 04:33 PM
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Joined: Jan 2003
Posts: 9,996 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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OP
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Joined: Jan 2003
Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
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Thanks Hemi itis! I just got the specs after the rehone. Had to go out to 4.5043 to get all eight holes clean. Line2line can easily make that up they say. They coat the skirts so only 25 percent of the desired piston to wall clearance is left, then a three step warmup/ cooldown process wears in the coating to proper fit and it gets saturated with oil and is ready to go. Since it needs a full cooldown three times that rules out dynoing the motor. Hopefully this coating will stablize everything and help make more power.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: The good, the bad, and the ugly,update, new motor combo
[Re: Cab_Burge]
#2719815
11/27/19 05:31 PM
11/27/19 05:31 PM
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Joined: Jan 2003
Posts: 9,996 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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OP
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Joined: Jan 2003
Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
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Just a guess but i thought they wanted the motor almost room temp each time. I will have to check with L2L, as a dyno session sure would be nice.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: The good, the bad, and the ugly,update, new motor combo
[Re: gregsdart]
#2719843
11/27/19 07:11 PM
11/27/19 07:11 PM
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Joined: Aug 2003
Posts: 43,157 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
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All the engine dyno facility I've used have local water supply piped into a tower, the towers have thermostat to set the run temps so you can test it at 220F down to the local water temps coming out of the pipes to the towers I like to do my pulls between 150F to 180 F, like I race my motors at
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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