Anyone having luck tuning the btr hemi cams with missing cam specs with vvt?
Anyone having luck tuning the btr hemi cams with missing cam specs with vvt?
i have
but i degree the cam with a wheel and an indicator.
you might wanna check valve to piston clearance while you are in there
Absolutely. I believe I have tuned all of their hemi ones. Stages 1 - 4 cams and the Truck Norris cam Ive tuned probably 4 or 5 of those this year. I want to say I have a page in my notepad that has all of the missing cam specs for each as well. I have to look for the page in my notebook but I can recall 2 of the cams missing specs. Hopefully you are using one of these two listed below...
Truck Norris: 212/230 .587/.586 109.5 +4 adv
Stage 4 Cam: 224/240 .587/.586 112.5 +3.5 adv
Last edited by Spray-Cam Hell-Ram; 05-31-2025 at 03:49 AM. Reason: added specs
"1MEAN16" Silver/Black 2016 Ram CCSB (4592lbs) NA 398ci Stroker
+6cc Mahle Dome Pistons w/ 13.1/1 Compression on E85
Forged 4.08" Stroke Crank, 224cc AFR Heads w/ Titanium 2.165"/1.65" Valves
Custom Cam 220/238 .611/.589 108.5 LSA 108.5 ICL, 105mm Hellcat TB
Ported Hi-Ram Intake, NXpress Hi-Ram NO2 Plate kit w/125 Shot(4 sec)
Tx Spd 2" Long Tubes, ATI SD 15%UD, Ram TRX K&N CAI
Dual 450 Pumps, Deatschwerks 1000cc Inj, Fuel Cell in Bed
Built 8HP70 w/ 3800 stall/Detroit Tru-Trac/410 Gears
More looking at the stage 1 cam potentially for a truck. Thanks for the info. If you have the other 3 cams that would be highly appreciated.
Stage 1: 212 / 220 112 LSA .587 / .586
Stage 2: 216 / 230 112 LSA .587 / .586
Stage 3: 220 / 230 112 LSA .587 / .586
"1MEAN16" Silver/Black 2016 Ram CCSB (4592lbs) NA 398ci Stroker
+6cc Mahle Dome Pistons w/ 13.1/1 Compression on E85
Forged 4.08" Stroke Crank, 224cc AFR Heads w/ Titanium 2.165"/1.65" Valves
Custom Cam 220/238 .611/.589 108.5 LSA 108.5 ICL, 105mm Hellcat TB
Ported Hi-Ram Intake, NXpress Hi-Ram NO2 Plate kit w/125 Shot(4 sec)
Tx Spd 2" Long Tubes, ATI SD 15%UD, Ram TRX K&N CAI
Dual 450 Pumps, Deatschwerks 1000cc Inj, Fuel Cell in Bed
Built 8HP70 w/ 3800 stall/Detroit Tru-Trac/410 Gears
not sure where you heard those numbers John, but if you check with a wheel, that is not what they actually are.
doesn't matter
there are soooo many more duration numbers that need looking at than just the 050 numbers....
I am basically needing enough to setup the vvt tables. They give you a holley table on the card but how many people are using a holley on a cam only charger?
Edit: i realized they give you just enough info to get going. Full advance on the wot table and subtract from full advance at the different rpm increments according to the chart. Does not necessarily aid with part throttle but i guess the same values can be used? Assuming the cam is lined up perfectly with the crank. That is also the holley way, full advance and retard x amount by rpm. Still a lot of variables and knowing the exhaust centerline would be nice and preferred. Knowing the ecl on the cam does not necessarily equate to what is actually in the engine either.
Last edited by 04silverado6.0; 4 Weeks Ago at 09:45 AM.
what do you mean?Originally Posted by 04silverado6.0
Machining tolerances and installer error.^
understand what effects where the cam can end up
i do not understand your statement about "centerline vs where the cam actually is"
centerline IS where the cam actually is
its where an imaginary line thru the exact center of the lobe is, in relation to the piston for the cylinder that the lobe belongs to
The ecl based on the cam spec or card is not necessarily where it is truly.
i think you might be confused...
any centerline that is printed or specified on a cam card is an instruction...
its not a number that can be ground into a camshaft.
Not confused. Yes, the cam needs a degree wheel. If the camshaft is at "0" then the icl and ecl are expected to be true to what is printed on the card. No machining tolerance ive ever seen was 0, always has a tolerance big or small. "0" in relation to the crankshaft can be way off or spot on what your cam card says. The lsa is the difference between icl and ecl so the centerlines in fact are ground with a number, assuming its installed correctly.
no, it is not
: )
Don, please tell me that you haven't already forgotten?
"1MEAN16" Silver/Black 2016 Ram CCSB (4592lbs) NA 398ci Stroker
+6cc Mahle Dome Pistons w/ 13.1/1 Compression on E85
Forged 4.08" Stroke Crank, 224cc AFR Heads w/ Titanium 2.165"/1.65" Valves
Custom Cam 220/238 .611/.589 108.5 LSA 108.5 ICL, 105mm Hellcat TB
Ported Hi-Ram Intake, NXpress Hi-Ram NO2 Plate kit w/125 Shot(4 sec)
Tx Spd 2" Long Tubes, ATI SD 15%UD, Ram TRX K&N CAI
Dual 450 Pumps, Deatschwerks 1000cc Inj, Fuel Cell in Bed
Built 8HP70 w/ 3800 stall/Detroit Tru-Trac/410 Gears
With the fun that you just had with your build you do not have any room to rib anybody…
about anything.
BTR cams + Audie/Cam Pro Plus = STEP AWAY.
04 RAMGTX........ 8.82@154mph 392Ci G3Hemi 3250lbs 2.6HP/Ci Naturally Aspirated
05 RAMGTxtreme 9:45@142mph 426Ci G3Hemi 4000lbs 2.2HP/Ci Naturally Aspirated
05 Rumble Bee 13.29@101mph STOCK 5.7l , Just a tune, still runs OEM airbox
09 Challenger Drag Pak 8.65@160mph 426Ci G3hemi 3650lbs 2.4HP/Ci Naturally Aspirated
G3 Hemi Videos
https://www.youtube.com/channel/UClS...5mXdDR5sOxs10Q
it looks like there is another bad batch of lifters going around
i have a customer who had satera do a cam swap last week and at least one of the lifters they got wont pump up
Ok.
the lobe separation angle is ground into the cam, but lobe centerline is not
"centerline" refers to distance from tdc - and for that you need a crank, a degree wheel, a rod, a piston, a lifter, a dial indicator, and a little bit of math
those +3.5 +4 advance numbers above are suggestions
up to the installer to put the cam there, or wherever he likes
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