

Roller Camshaft Discussion - Data Collection
#41
Posted 04 November 2015 - 01:27 PM
-Rides-
-1987 Starion -Midnight Star - FORD BARRA GTX4508r Build Progress see link
http://www.starquest...howtopic=152434
-1989 Chrysler Conquest-Track Beast Mode gtx3071r TBI 365hp 407tq @19psi/ 401hp 430tq @ 24psi sold
http://www.starquest...ic=151885&st=40
-1989 Pontiac Grand Prix Turbo SE- 3.1 gtx3582r getrag284 Tilton twin disc
-1991 Toyota Hilux Pickup 1uz itb cp pistons kelford cams TripleR head porting/ long tubes
-1986 AE86 20v.. 171hp@ 8200rpm
#42
Posted 04 November 2015 - 01:30 PM
#43
Posted 04 November 2015 - 03:42 PM
Quote
will bolt right up without any modifications. They retain the same rocker
arm ratio as your existing setup.
Camshaft I would recommend the HKS style 272 turbo profile. Unfortunately
our camshafts do not come with camshaft cards and I can only provide you
with the most basic specifications only. But a 272 duration / 300" valve
lift is what we mostly use with great results.
If you want a custom profile we can make one of these for you, but we would
not be able to match it exactly, as we can only work off already developed
camshaft profiles so we would use one which is closest to the specifications
you would ask for.
Last email I received...a bit ironic being yours had fitup issues:
Quote
specifications as the TS/TR magn.
So there are no fitting issues as such
#44
Posted 04 November 2015 - 04:26 PM
Jarek
-Rides-
-1987 Starion -Midnight Star - FORD BARRA GTX4508r Build Progress see link
http://www.starquest...howtopic=152434
-1989 Chrysler Conquest-Track Beast Mode gtx3071r TBI 365hp 407tq @19psi/ 401hp 430tq @ 24psi sold
http://www.starquest...ic=151885&st=40
-1989 Pontiac Grand Prix Turbo SE- 3.1 gtx3582r getrag284 Tilton twin disc
-1991 Toyota Hilux Pickup 1uz itb cp pistons kelford cams TripleR head porting/ long tubes
-1986 AE86 20v.. 171hp@ 8200rpm
#45
Posted 04 November 2015 - 04:29 PM
-Rides-
-1987 Starion -Midnight Star - FORD BARRA GTX4508r Build Progress see link
http://www.starquest...howtopic=152434
-1989 Chrysler Conquest-Track Beast Mode gtx3071r TBI 365hp 407tq @19psi/ 401hp 430tq @ 24psi sold
http://www.starquest...ic=151885&st=40
-1989 Pontiac Grand Prix Turbo SE- 3.1 gtx3582r getrag284 Tilton twin disc
-1991 Toyota Hilux Pickup 1uz itb cp pistons kelford cams TripleR head porting/ long tubes
-1986 AE86 20v.. 171hp@ 8200rpm
#46
Posted 04 November 2015 - 04:31 PM
-Rides-
-1987 Starion -Midnight Star - FORD BARRA GTX4508r Build Progress see link
http://www.starquest...howtopic=152434
-1989 Chrysler Conquest-Track Beast Mode gtx3071r TBI 365hp 407tq @19psi/ 401hp 430tq @ 24psi sold
http://www.starquest...ic=151885&st=40
-1989 Pontiac Grand Prix Turbo SE- 3.1 gtx3582r getrag284 Tilton twin disc
-1991 Toyota Hilux Pickup 1uz itb cp pistons kelford cams TripleR head porting/ long tubes
-1986 AE86 20v.. 171hp@ 8200rpm
#47
Posted 06 November 2015 - 01:38 PM
Traded for new set of tires for my wife's Buick: '87 TSI Gold that needs just about all steering and suspension parts replaced, injectors, a new transmission, clutch, and various electrical gremlins. New owner is a mechanic who is already driving it. I couldn't stand letting it sit any more!
'86 ESiR - OEM Roller Cam, Wiseco Forged 8:1 Pistons, Chad's equal length header, TEP T3/T4 turbo, ACT HD clutch, Fidanza Fly, custom 3" exhaust, 3 core oversized radiator, O-ringed block, AJUSA metal shim head gasket, Dawes Device boost controller
'85 Plymouth Conquest Auto , Wiseco 8:1, super light pins, shaved rods, hi-torque cam, 2.5 Exhaust
'84 Dodge Conquest Parts car
'83 Starion - Gutted stock exhaust with '87 TSi muffler, New engine with: BS Elim,forged Wisecos,balanced,Schneider274H,marnal w/oversized stainless valves
'83 Cannonball Run II Jackie Chan car, Basic ring and bearing job w/less than 6K original miles on body, steering, suspension, & rear end, Lightened stock fly, BS Elim, Walbro 255LPH FP, NEW Clearwater head with all new parts, intercooled, 14G turbo, 2750 car weight
'96 Mitsu Mirage w/rebuilt head. Gets 35+MPG.
'87 Dodge Ram50 4WD Rebuilt engine, fresh stock head, Weber carbed, BS elim. Runs great now!
'97 Buick Ultra (supercharged Park Avenue)
#48
Posted 06 November 2015 - 07:24 PM
Top notch Tim,, I agree 100 percent. Sorry to see this happen to you, Dude just used you to make him out to be a big shot.. Real shame.
#49
Posted 06 November 2015 - 08:45 PM
His: Durban maroon with 351w
Sophia white MS2 full sequential with BW S257sxe in the middle of a full tear down
Hers: Red restored and on the road, mostly stock
#50
Posted 07 November 2015 - 10:33 AM
Quote
I'll just add that I tried my Aussie roller first with the 1.6 ratio roller rockers and it held the valves open slightly, about 65-70% leakdown. Switched to the 1.5 ratio and it runs fine. I have not done any degreeing yet as my goal was to switch to a roller setup and get some run time on it, and I can say I like it.
I can upgrade your Fuel Injection Pro firmware
Performance Coatings! Pistons, manifolds, bearings and more!
Now a graduate of EFI University! www.efi101.com
ECU Vendor link: http://www.starquest...howtopic=137426
#51
Posted 10 November 2015 - 08:16 AM
#52
Posted 10 November 2015 - 06:21 PM
Built G54B, S364, R154, stock 6-bolt, fireballs
#53
Posted 11 November 2015 - 10:08 AM
Funky Phil, on 10 November 2015 - 06:21 PM, said:
Haha, no not in terms of that. I feel bad because my gut reaction to posting Tim's cam source was 'this is wrong' but I didn't do anything about it. Would have been so easy to just hide the post, shoot a pm to the OP, and request he get in touch with TIm prior to posting that info online. At a bare minimum, it deserved a response to the thread saying just that. Neither of which I did.
Haven't thought too much about cams this week. I'm in a dilemma what to do. I will back out the lift on the galant rocker vs the caravan rocker...just for the sake of it. Still am left in a quandry as to the P/N of a magna roller cam. Can't believe that I'm having such a hard time finding a parts list for the later 4g54 engines with this roller cam.
#54
Posted 03 January 2016 - 02:51 PM
Mach 5's RPW G54B Billet Roller "Custom" Cam
Intake Lobe
.002"/ -11.5*
.050"/ 7.5*
.100"/ 21*
.150"/ 34*
.200"/ 43*
.250"/ 65*
.300"/ 96*
.310"/ 111.5*
.300"/ ?*
.250"/ 158.5*
.200"/ 175.5*
.150"/ 190*
.100"/ 204.5*
.050"/ 220*
.002"/ 250*
Exhuast Lobe
.002"/ -74*
.050"/ -39*
.100"/ -22*
.150"/ -8.5*
.200"/ 5*
.250"/ 23.5*
.300"/ 48.5*
.312"/ 75*
.300"/ 93*
.250"/ 117.5*
.200"/ 143*
.150"/ 147*
.100"/ 157.5*
.050"/ 172.5*
.002"/ 204*
-Rides-
-1987 Starion -Midnight Star - FORD BARRA GTX4508r Build Progress see link
http://www.starquest...howtopic=152434
-1989 Chrysler Conquest-Track Beast Mode gtx3071r TBI 365hp 407tq @19psi/ 401hp 430tq @ 24psi sold
http://www.starquest...ic=151885&st=40
-1989 Pontiac Grand Prix Turbo SE- 3.1 gtx3582r getrag284 Tilton twin disc
-1991 Toyota Hilux Pickup 1uz itb cp pistons kelford cams TripleR head porting/ long tubes
-1986 AE86 20v.. 171hp@ 8200rpm
#55
Posted 04 January 2016 - 09:26 AM
I have some new info to share as well. Thanks to the clever eye of Notstock88, I was able to acquire an OEM magna cam and roller rockers from a M6 used magna head.
I'm having browser issues it seems, can't post pics. But long story short is than md106245 is the part number for the stock magna roller rocker. Which is indeed the same as the exhaust rocker on the 2.0 SOHC galant engine! Have tons of pics to prove it....coming soon.
The roller rocker ratio of this rocker is just under 1.55. The lift is .405" with the magna cam. Have the curves plotted out and will post as soon as I can. But they are the same as Kevin C's plots.
Never found the true p/n of the magna cam.
I also tested the v6 rocker arms with the magna cam, as expected the valves are held open on the base circle. The cam would need to be ground to work with those rocker arms. Interestingly, the rocker ratio on the v6 arms was close to 1.7 using the magna cam!
For now I'm building the engine with the stock magna roller setup. I degreed it in at 3 degrees advance and plan on eventually playing with the cam timing on a dyno. This will establish a good baseline. I'll keep my eyes open for another magna cam down the road to regrind to use the v6 arms and a split duration....but that is far off.
I'll post my pics as soon as I can but I'm going to turn this over to you guys for I'm done with this camshaft science project. My engine is almost built and I'm saving up for my turbo/waste gate. Next debacle for me is to build the exhaust and intake piping.
Kev
#56
Posted 05 January 2016 - 11:06 AM
Thus, the P/N for the OEM 4g54 roller rockers is MD106245. This is the same as the exhaust rocker on the 2.0L SOHC Mitsubishi engine sold in the USA.
kev
#57
Posted 05 January 2016 - 11:07 AM
Prior to even placing this cam into my new head casting; I took it to a local machine shop whom polished the bearing surfaces. They removed about .0005" of material which wasn't enough to completely remove the scores on the surface but what it did was smooth it out to eliminate any high spots. The machinist assured me that there will be no issue with running the cam like this. I still felt a bit uncomfortable so I had another local machine shop look it over and give me a second opinion (same answer). After polishing, I'm still within spec on the oil clearance (~.0025 via measuring and double checked with plastigage). Still may be taking a risk, but I will be running this cam on my build.
Finally, I cut off the knub at the end of the cam used on fwd applications and hand polished the cam lobes:
#58
Posted 05 January 2016 - 11:07 AM
Finally; here is the chart showing the Magna cam w/MD106245 rockers vs the Monsta-Banshee w/V6 rockers in addition to the Magna cam w/v6 rockers. As I said earlier, the v6 rockers opened the valves on the b/c even with fully collapsed lifters. The two lifters that I was using had slightly different collapsed lengths which is why you see a lower lift on the exhaust than the intake in the graph. Although I didn't hunt it down further, I'm pretty confident that the max lift with the v6 rocker on the magna cam is .440" or possibly a hair greater (meaning a RR of 1.67 on the V6 rockers).

Should probably have taken more measurements than just every .050" lift but it told the story...ie the curves matched what Kevin C. posted using the cam profiler.
The v6 rockers do contact at a slightly different location but note that the overlap is identical to the MD106245 rocker! They result in a higher lift and greater duration without sacrificing the LSA too much (~2 cam degrees) and holding the overlap. I believe there would be extensive gains by simply regrinding the Magna cam to accept the higher ratio v6 rocker...not even having to experiment with different lobe profiles. But as I said, I don't have a baseline or a way to prove any gains...so I'll start off using the stock Magna condition and go from there.
kev
#59
Posted 06 January 2016 - 09:27 PM
Built G54B, S364, R154, stock 6-bolt, fireballs
#60
Posted 08 January 2016 - 10:07 PM
vettekiller593, on 09 September 2011 - 10:20 AM, said:
lionbull, on 07 September 2011 - 02:26 PM, said:
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