Re: 5.9 Magnum Hydraulic Roller Cam Regrind
[Re: chache876]
#594670
01/26/10 07:04 PM
01/26/10 07:04 PM
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Joined: Mar 2003
Posts: 4,915 Tri-Cities, Washington
VITC_GTX
master
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master
Joined: Mar 2003
Posts: 4,915
Tri-Cities, Washington
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Sounds like I have the same setup you do. I grabbed a '98 5.9 Magnum out of a junkyard (truck engine). Took off the fuel injection and replaced it with an Eddy Air-Gap and 650 carb. Got a cam from Scott Brown (old Straightline Performance days). It is a 226/232 with .520 lift. I did have to cut the valve guides down for the .520 lift and put on new valve springs but other than that it's stock. In fact, I never even tore the bottom end apart. I put it in a '71 Demon with a 3600 flash PTC convertor and 3.91's and it runs 12.70's at 104 mph Runs great on the street!!! I have the cam card/part # if you would like it, just PM me and I will pull it out.
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Re: 5.9 Magnum Hydraulic Roller Cam Regrind
[Re: chache876]
#594671
01/26/10 07:44 PM
01/26/10 07:44 PM
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Joined: Jan 2005
Posts: 12,406 Kalispell Mt.
HotRodDave
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I Live Here
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Posts: 12,406
Kalispell Mt.
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If your going to use the 3100 behive springs you have to use the 3100 behive retainers NOT the 2.2 2.5 retainers. You use the 2.2 2.5 retainers with the mopar performance springs, both the mopar springs and 2.2 retainers are a lot more than the 3100 stuff.
The mopar stuff can handle a bigger cam but under .500 lift and modest RPM I have had good luck with the 3100 stuff.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 5.9 Magnum Hydraulic Roller Cam Regrind
[Re: chache876]
#594673
01/26/10 08:23 PM
01/26/10 08:23 PM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
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I Live Here
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Florida
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IIRC,i thought I read to use the 3100 GM spring with the 2.2 retainers also IIRC I talked to patrick about that when he sugested the comp 901-16 spring for my pre-mag roller set up and the GM 3100 for a mag head
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Re: 5.9 Magnum Hydraulic Roller Cam Regrind
[Re: scratchnfotraction]
#594676
01/26/10 10:00 PM
01/26/10 10:00 PM
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Joined: Oct 2003
Posts: 1,371 Costa Mesa, CA
chache876
OP
pro stock
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OP
pro stock
Joined: Oct 2003
Posts: 1,371
Costa Mesa, CA
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Quote:
IIRC,i thought I read to use the 3100 GM spring with the 2.2 retainers also
IIRC I talked to patrick about that when he sugested the comp 901-16 spring for my pre-mag roller set up
and the GM 3100 for a mag head
I just went back through my bookmarks from the other day when I was searching info on springs for magnum engines and patrick/hotroddave did say that you have to use the 3100 retainers with the 3100 springs. He mentioned in one thread that they are the same as the LS1 springs apparently. 2.2/2.5 springs go with the mopar springs
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Re: 5.9 Magnum Hydraulic Roller Cam Regrind
[Re: scratchnfotraction]
#594678
01/26/10 11:08 PM
01/26/10 11:08 PM
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Joined: Feb 2005
Posts: 5,221 Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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I had mine done through Bullet cams about 2 months ago, there is not a hole lot that can be done with these factory cams, at least not with my 95, we settled on this grind.
.477/.477, .216/.218 @50 on a 112 with 1.6 rockers.
If you want more, i'd call Hughes, i'm limited to .500 lift also on my RHS heads, i was looking at something on a 109/110 LSA with Dur. in the upper 220s/low 230s @50, lift right around .500 with Hughes, this should still work great with a 26-2800 stall, mine is a freakin torque monster with this cam, i'm sure it'll fall apart at 52-5400.
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Re: 5.9 Magnum Hydraulic Roller Cam Regrind
[Re: HotRodDave]
#594679
01/27/10 09:14 AM
01/27/10 09:14 AM
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Joined: Jan 2003
Posts: 16,122 Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,122
Grand Haven, MI
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Quote:
If your going to use the 3100 behive springs you have to use the 3100 behive retainers NOT the 2.2 2.5 retainers. You use the 2.2 2.5 retainers with the mopar performance springs, both the mopar springs and 2.2 retainers are a lot more than the 3100 stuff.
The mopar stuff can handle a bigger cam but under .500 lift and modest RPM I have had good luck with the 3100 stuff.
yup, except instead of the MP springs, use the hughes #1110 springs. they're the same price as napa's price on the GM springs, but yeild and extra ~ .040" lift clearance. once I priced it out both ways, I thought the hughes springs were a better value.
for a cam, on my mag headed 318, I had bullet regrind using their HR259/316 lobe for both intake and exhaust, ground on my cam's factory LSA (112). it's a torquey SOB, and pulls hard up to 5500 RPM. idles very clean, near stock, but makes a lot more power. works out to .506" lift, and I have plenty of valve guide clearance. I'm using junkyard 2.2L retainers (got 'em for $10) and the hughes springs and the stock magnum keepers. if you run headers, and especiually if you do a little port cleanup on the heads, they flow good enough on the exhaust that you don't really need a split duration cam. one thing with mine, it is from my '86 short block, so it is an LA roller cam core. I dealt with Tim at bullet. talking with him, it sounds like the LA cores might have a deeper hardened layer, which will allow bigger lobes. beings mine was from a 5th ave (carb motor) it also had the long snout for a mechanical fuel pump.
when looking at cam specs, IMHO, I'd look more at .2" duration numbers than .050 duration numbers. that'll tell you the cam's power potential. for example, my cam's specs are [Email]259@.006"[/Email] lift, [Email]208@.050[/Email], and [Email]127@.200".[/Email] for comparison, a comp XE262 is [Email]262@.006"[/Email], [Email]218@.050[/Email] (10 degrees bigger) and [Email]130@.2"[/Email] (only 3 degrees bigger). this 318 with the roller cam and mag heads feels about as strong as my old 360 with the XE262 with the same induction and exhaust. except it idles much better and gets on average 2-3mpg better fuel economy
I'm very happy with my bullet regrind. another option would be hughes, their HER1828 is the largest they sell as a regrind, and I think is bigger than bullet will regrind on a magnum core. if you want a little more upper RPM power from a bullet grind, I'd see if they could fit the HR266/325 or HR270/330 lobe on there. both will require the hughes springs, the GM ones won't have enough lift capacity (only about .490" max lift from my measurements on my heads)
Last edited by patrick; 01/27/10 09:19 AM.
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: 5.9 Magnum Hydraulic Roller Cam Regrind
[Re: chache876]
#594683
01/29/10 09:23 AM
01/29/10 09:23 AM
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Joined: Jan 2003
Posts: 16,122 Grand Haven, MI
patrick
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I Live Here
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Grand Haven, MI
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Quote:
I guess my next questions is in regards to pushrods and rocker arms. I've been browsing around on some dakota forums and they're claiming new pushrods are an absolute necessity with a new cam. True?
first off, to answer scratchin's question, NO. the LS1 springs and GM3100 springs have the same top end geometry and use the same PN for a spring retainer. they are both beehives, with ~.9" OD on the top. but the LS1 is a 1.2" OD bottom with a blueprint 1.8" IH from the factory, the 3100 springs are a 1.4" OD bottom (so they fit the magnum heads), with a a blueprint IH of ~1.7", and a coil bind height of ~1.065".
the 2.2L retainers allow the use of any straight 1.35-1.45" OD spring with an ID greater than ~ .9" with the factory 8mm stems and keepers....they fit my hughes 1110 springs great.
to answer the pushrod question, "it depends". on my build, stock magnum PR's worked fine, this with a factory '86 block deck height (no idea how close it was to blueprint), thin Mr. gasket head gasket (.028" compressed), my roller cam reground, and when I had the heads done, I had the valves sunk .030" to gain a little more IH. with the 2.2L retainers and magnum keepers, my installed height was 1.60" with the factory valve job. coil bind is 1.040", so I had .560" travel before coil bind, but .540" before the keepers hit the old valve seals on the heads. my current IH is 1.63" and I now have .590" travel before coil bind, and ~.560-.570" travel before the keepers hit the seals, so I should be good if I ever want to crank the lift up into the .530-.540" range, as long as I have V/P clearance...with the stock pistons in the hole .055", my measured V/P clearance was ~ 1/8", but that's as much a function of cam duration as cam lift.
I found some comp pushrods for a ford 302 that were ~ .020" longer than the mag PR's, that when I tried them out assembling the engine, worked fine, too.
Last edited by patrick; 01/29/10 09:33 AM.
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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