Re: which cam is best for my 361
[Re: plymouth62]
#981235
04/27/11 04:52 AM
04/27/11 04:52 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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I think the compression ratio with stock pistons, 906 heads and the thin 0.020" head gasket is supposed to be about 7.5:1? Sounds like you have a pretty mild cam? what is the duration? I'm guessing the cam you have is the 252H High-Energy 206/206 @ 0.050", 0.425"/0.425" 110 lsa, 106 cl? It should work OK.
Last edited by 451Mopar; 04/27/11 04:53 AM.
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Re: which cam is best for my 361
[Re: moturbopar]
#981241
04/27/11 07:55 PM
04/27/11 07:55 PM
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Joined: Jan 2003
Posts: 5,186 Wherever I am.
Junky
master
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master
Joined: Jan 2003
Posts: 5,186
Wherever I am.
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Quote:
what about a comp xe262 or xe268?
The XE262H Comp Cam in the 361 would be similar to running the XE268H in a 383. Run a 650 or 670 carb with the XE262H and headers. That'd give ya some idle with muscle and some good umph. Why not? That's what I'd do.
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Re: which cam is best for my 361
[Re: plymouth62]
#981244
04/27/11 09:59 PM
04/27/11 09:59 PM
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Joined: Feb 2003
Posts: 1,665 Milwaukee, WI
Prince_Valiant
top fuel
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top fuel
Joined: Feb 2003
Posts: 1,665
Milwaukee, WI
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I'd be in favor of the comp xe 262 cam...
if I was looking for a strong 361 w/ stock gears/torque converter etc I'd probably keep the stock heads, maybe a fresh valve job depending on the mileage and general condition of the engine, performer rpm (yep) with a 600 holley, the aforementioned compxe 262 cam, good MP ignition (16-17 degrees initial timing, 38-40 degrees full advance by 2800rpm) w/ orange box, and probably some schumacher tri-y headers.
Good strong engine, that'll work well with a heavier car w/ stock gears, converter, get good mileage, and make a good show in an impromtu drag race at a stop light or otherwise. It doesn't take much with a decent mild v8 to make for a nice street cruiser/part-time bruiser.
1979 Dodge Lil' Red Express - 360 rwhp, 13.2 @ 103mph 1968 Coronet: 318, 2.76, 15.2 @ 92mph! (SOLD) 1976 Valiant: 360, 3.90, 12.90 @ 106 (SOLD) 1989 Shelby CSX #500/500
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Re: which cam is best for my 361
[Re: plymouth62]
#981245
04/27/11 10:25 PM
04/27/11 10:25 PM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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I don't know much about the 361 engines reguarding what they had for stock cam, pistons and compression? When I did a search for replacement pistons I only came up with the Sealed Power #251, and the Silv-o-lite #3219. Both are supposed to be stock replacement pistons with a 1.880" compression distance and dished (approx 14.5cc?) This should mean the piston will be 0.052" below deck height at TDC, and even with 72cc chamber heads, and a 0.020" head gasket, the compression ratio is still only 8.18:1. With 84cc heads compresion drops to 7.43:1 with the 0.020" head gasket. With a 0.040" head gasket, compression is only 7.16:1? It sounds like you already have a nice set of 906 heads, and the 252H cam, and they will work with your combination (may have to check valve to cylinder bore clearance?) At the 7.43:1 compression ratio, with the 252H cam you should have 120 psi cranking compression which is not too bad considering the low compression ratio. It does not look like there is much you can easely do about the compression ratio short of a rebuild with custom pistons or a stroker crank.
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Re: which cam is best for my 361
[Re: 451Mopar]
#981247
04/28/11 01:43 PM
04/28/11 01:43 PM
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Joined: Jul 2008
Posts: 30,632 Florida STAYcation
IcorkSOAK
Financed his waterbed
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Financed his waterbed
Joined: Jul 2008
Posts: 30,632
Florida STAYcation
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Quote:
pistons with a 1.880" compression distance and dished (approx 14.5cc?)
I got a set of those off-of eBay some years back for 35$ or something like that. A HD piston ferr-sure ... but anything close to HP ? ... NOT !
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