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Unread 04-09-2013, 09:44 AM   #1
revelc
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1985 FSJ Wagoneer 
 
Join Date: Nov 2011
Location: Tyler, Texas
Posts: 663
I am already thinking I want more cam.

There's a Comp Cam with 218 .493 and 224 .5 lift.

I have either stock or mild performance springs. I can't say because I didn't install them. But I know they are new.

I have heard different opinions about the springs being able to handle up to .5 before they need to be replaced.

http://www.crower.com/amc-290-401-co...m-276-hdp.html <---- my current cam


http://www.compcams.com/Company/CC/c...x?csid=21&sb=2 <----- what I was thinking about. Or even a Summit K6000.

In my mind more lift = more fuel and air flowing into the cylinder, right?

Or would gains be negligible?
I have to pull the tranny soon anyways because of the plate between the engine and tranny or rubbing so I could drop a mild stall converter and get a lightly more aggressive cam.

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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-10-2013, 08:43 PM   #2
super98lsc
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Join Date: May 2006
Location: Austin, TX
Posts: 1,380
can you ask the shop that setup the heads for the install heights and seat vs open pressures? They should be able to measure for coil bind.
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06-Corvette z51-6spd,b&b,K&N low miles.
77-Corvette Stingray 496 BBC/TH400 built 667hp+
===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!
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Unread 04-11-2013, 07:30 AM   #3
revelc
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1985 FSJ Wagoneer 
 
Join Date: Nov 2011
Location: Tyler, Texas
Posts: 663
Quote:
Originally Posted by super98lsc
can you ask the shop that setup the heads for the install heights and seat vs open pressures? They should be able to measure for coil bind.
Honestly I purchased someone's unfinished project and have no clue which shop did it.

It did have a mid range Crower cam that runs at .488 lift

They don't bind or float but idk what they are.
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-11-2013, 07:45 AM   #4
super98lsc
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Have them measured. When choosing a cam your static compression is really important. if it were mine I would pull the heads.have them pressure tested for sealing, guides, and seat/open pressures tested, also have the Chambers cc'd so you know what your dealing with. for example if they setup the seat pressure at 130# the lobes on most hydraulic flat tappets wont last long. Not floating just means there is enough open pressure to keep them closing with the cam lobe, ramp rate. having a good cut on the valves is as important as the cam. If they are stock it will leave a lot of flow on the table as the seat and valve angles have a profound affect on flow at different lifts. For example if the head flows best at .300 to.488 lift you want a cam that will maximize.open time in that range (duration) going with a .544 lift will just result in a nastier idle sound and less power average. Now the fun part is figuring up the dynamic compression, any long duration grind will want more static compression or your dcr will be so low the hotter cam will lose power. Sound mean but will be a slug until.4k+ rpm.
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www.mangierisrc.com
06-Corvette z51-6spd,b&b,K&N low miles.
77-Corvette Stingray 496 BBC/TH400 built 667hp+
===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!
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Unread 04-11-2013, 07:59 AM   #5
revelc
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1985 FSJ Wagoneer 
 
Join Date: Nov 2011
Location: Tyler, Texas
Posts: 663
Quote:
Originally Posted by super98lsc
Have them measured. When choosing a cam your static compression is really important. if it were mine I would pull the heads.have them pressure tested for sealing, guides, and seat/open pressures tested, also have the Chambers cc'd so you know what your dealing with. for example if they setup the seat pressure at 130# the lobes on most hydraulic flat tappets wont last long. Not floating just means there is enough open pressure to keep them closing with the cam lobe, ramp rate. having a good cut on the valves is as important as the cam. If they are stock it will leave a lot of flow on the table as the seat and valve angles have a profound affect on flow at different lifts. For example if the head flows best at .300 to.488 lift you want a cam that will maximize.open time in that range (duration) going with a .544 lift will just result in a nastier idle sound and less power average. Now the fun part is figuring up the dynamic compression, any long duration grind will want more static compression or your dcr will be so low the hotter cam will lose power. Sound mean but will be a slug until.4k+ rpm.
Well the whole engine was build by a speed shop from what the guy said. It has 9.5 pistons and a 5-angle valve job. I believe they are mildly ported as well. I have been running the current setup and its a tractor. I climbed a steep loose dirt hill and it climbed all the way up in 4-low at about 1,000-1,200 RPM.

The idle quality is really good too. I know whoever set it up knew what they were doing.

My real desire is to have more hole shot power. So a similar duration cam (factoring in a tighter LSA) with higher lift should in my mind yield slightly more power across the band with the larger lift characteristics.

I have an extra set of heads off of a 360. I can have them cut and cleaned with stainless valves and the right springs eventually. But what I am after is what I can probably get away with for now.
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-11-2013, 12:52 PM   #6
super98lsc
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1999 WJ 
 
Join Date: May 2006
Location: Austin, TX
Posts: 1,380
Is this a different motor than the one in your rig now?
__________________
www.mangierisrc.com
06-Corvette z51-6spd,b&b,K&N low miles.
77-Corvette Stingray 496 BBC/TH400 built 667hp+
===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!
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Unread 04-11-2013, 03:34 PM   #7
revelc
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1985 FSJ Wagoneer 
 
Join Date: Nov 2011
Location: Tyler, Texas
Posts: 663
Quote:
Originally Posted by super98lsc
Is this a different motor than the one in your rig now?
Yeah. I didn't know what cam was in it so I tore it all down and put it back together. It just so happened the cam that was already in it was the one I ordered so I sent it back and used what I already had.

It's the same 401 I've been blabbering about though.

Would a cam with more lift around the same duration yield more power or would I need a slightly bigger cam with a mild stall converter?

I have to pull my tranny anyways because the dust cover/plate between tranny and engine is warped and rubbing the flywheel a little when it's under WOT.
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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