Re: 440 six pack - running hot - why
[Re: Challenger 1]
#356070
06/23/09 10:35 PM
06/23/09 10:35 PM
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Joined: Nov 2006
Posts: 533 Williamsport, PA
Rob440Magnum
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Quote:
More details needed, shrouds? clutch fans?
new reproduction 26" fan shrouds on both cars. Both cars 26" radiators. Clutch fans on both cars however the six pack has a new Mopar Perf. clutch fan which if I remember correctly is a 5 blade fan and I have the origianl 7 blade clutch fan on my car.
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Re: 440 six pack - running hot - why
[Re: Rob440Magnum]
#356072
06/23/09 10:45 PM
06/23/09 10:45 PM
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Joined: Sep 2005
Posts: 12,481 Chino Valley
RodStRace
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either he is developing much more heat (lean, bigger bore, clogged cooling passages), or he isn't shedding as much heat (WP, fan, radiator, shroud). Take the temp readings in as many places as possible and compare. Lower radiator hose, WP, Heater hoses, etc.
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Re: 440 six pack - running hot - why
[Re: MNobody]
#356073
06/23/09 10:50 PM
06/23/09 10:50 PM
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Joined: Nov 2006
Posts: 533 Williamsport, PA
Rob440Magnum
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Quote:
What waterpump's?
not 100% sure, but I think we have the same ones new from Mancini Racing. Can't remember what model # or specifics. What information about the water pump would you want to know?
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Re: 440 six pack - running hot - why
[Re: Rob440Magnum]
#356074
06/23/09 10:54 PM
06/23/09 10:54 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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what do his/yours plugs look like & he might pull his stat for 1 day. EDIT forgot about timing(his vs yours)MORE EDIT he might block his intake(like yours) & see if that equalizes things & if so then decide how he wants to get the choke to open properly(I'm betting on this last one)
Last edited by RapidRobert; 06/23/09 10:59 PM.
live every 24 hour block of time like it's your last day on earth
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Re: 440 six pack - running hot - why
[Re: Rob440Magnum]
#356078
06/23/09 11:03 PM
06/23/09 11:03 PM
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Joined: Nov 2006
Posts: 533 Williamsport, PA
Rob440Magnum
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Quote:
he might block his intake(like yours) & see if that equalizes things & if so then decide how he wants to get the choke to open properly(I'm betting on this last one)
Any other six packs out there with no heat riser, stock choke hooked up, and the heat crossovers on the valley pan open with their motors running hot?
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Re: 440 six pack - running hot - why
[Re: Rob440Magnum]
#356079
06/23/09 11:21 PM
06/23/09 11:21 PM
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Joined: Feb 2005
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MNobody
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Quote:
Quote:
What waterpump's?
not 100% sure, but I think we have the same ones new from Mancini Racing. Can't remember what model # or specifics. What information about the water pump would you want to know?
Some pumps have more fins on the impeller to move more water, i believe AC cars have 7 versus 5 on the non AC cars.
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Re: 440 six pack - running hot - why
[Re: MNobody]
#356080
06/23/09 11:53 PM
06/23/09 11:53 PM
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Joined: Feb 2003
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SomeCarGuy
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Lots of stuff has been covered here.
First, what are the actual temps you are seeing? What gauges are being used?
Was his engine bored over more than yours?
I don't think the heat riser will make the diffeence you are looking for on his car. I don't think the choke will work a whole lot different blocked, mine is and the intake gets plenty hot once the car warms up. He could just wire it open and live with the poor cold running temper, it doesn't tae that long to warm up anyway.
Is his fan belt tight? Might just be a new belt that was put on at the rebuild time that has loosened up.
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Re: 440 six pack - running hot - why
[Re: Rob440Magnum]
#356081
06/24/09 12:00 AM
06/24/09 12:00 AM
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Joined: Oct 2004
Posts: 16,478 Canada
CrAzYMoPaRGuY
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It could be anything, tune stands out to me, as well as various cooling parts, but since nobody has touched on it yet...
Has anybody thrown a block in a hot tank and actually CHECKED for silt etc at the bottom of the block? I have and have found some blocks packed with hardened debris. I used all sorts of tools to dig it out through the frost plug holes, I was amazed at what was left in some...
If all else fails it *might* be worth checking as a very last resort..? I have a feeling timing and carbs might be the first area to look at though...
CrAzYMoPaRGuY
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Re: 440 six pack - running hot - why
[Re: CrAzYMoPaRGuY]
#356082
06/24/09 06:44 AM
06/24/09 06:44 AM
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Joined: Nov 2006
Posts: 533 Williamsport, PA
Rob440Magnum
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Quote:
Was his engine bored over more than yours?
both bored the same 30 over
Quote:
I don't think the heat riser will make the diffeence you are looking for on his car. I don't think the choke will work a whole lot different blocked, mine is and the intake gets plenty hot once the car warms up. He could just wire it open and live with the poor cold running temper, it doesn't tae that long to warm up anyway.
Do you have a six pack? With your crossovers blocked does your choke still function properly?
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Re: 440 six pack - running hot - why
[Re: MNobody]
#356084
06/24/09 09:19 AM
06/24/09 09:19 AM
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Joined: Jan 2003
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62maxwgn
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Quote:
Quote:
Quote:
What waterpump's?
not 100% sure, but I think we have the same ones new from Mancini Racing. Can't remember what model # or specifics. What information about the water pump would you want to know?
Some pumps have more fins on the impeller to move more water, i believe AC cars have 7 versus 5 on the non AC cars.
Standard pump has 8 blades,A/C has 6,keeps water in radiator longer with slower circulation.
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Re: 440 six pack - running hot - why
[Re: Rob440Magnum]
#356085
06/24/09 09:20 AM
06/24/09 09:20 AM
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Joined: Jan 2003
Posts: 74,979 U.S.S.A.
JohnRR
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Quote:
Quote:
what do his/yours plugs look like & he might pull his stat for 1 day. EDIT forgot about timing(his vs yours)
My timing is 13 degrees initial and the six pack is 15 degrees initial timing. We cannot go any higher or they ping on 93 pump gas.
Plugs are fine.
What are you recommending we try with the thermostat?
What is his and your TOTAL timing ? I ASSuME the shop that dynoed the engines recurved the dizzy's as needed ?
If the water temps are very close then it's not really running hot . because his crossover is open the intake is hotter on his engine vs. yours , plus the 6pack air cleaner is alot bigger than yours and will trap the heat coming off the engine.
Did you adjust the timing from what the dyno sessions were set at ? if so which way ?
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Re: 440 six pack - running hot - why
[Re: JohnRR]
#356086
06/24/09 09:28 AM
06/24/09 09:28 AM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
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Quote:
Quote:
Quote:
what do his/yours plugs look like & he might pull his stat for 1 day. EDIT forgot about timing(his vs yours)
My timing is 13 degrees initial and the six pack is 15 degrees initial timing. We cannot go any higher or they ping on 93 pump gas.
Plugs are fine.
What are you recommending we try with the thermostat?
What is his and your TOTAL timing ? I ASSuME the shop that dynoed the engines recurved the dizzy's as needed ?
If the water temps are very close then it's not really running hot . because his crossover is open the intake is hotter on his engine vs. yours , plus the 6pack air cleaner is alot bigger than yours and will trap the heat coming off the engine.
Did you adjust the timing from what the dyno sessions were set at ? if so which way ?
Yes he mentioned any more than 15 degrees initial it will ping, sounds like the dist is not setup right.
I run 18 initial and 34 total and my 440 six pak which runs great and stays cool even on 90 degree days with the AC cranking. I drove it for about a hour last Sun(90 degree day) and then pulled in the driveway and let it idle for another 15 mins and the temp stayed rock steady. BTW all stock cooling system.
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