Solid Roller camshaft selection those of you running a 408 race application - lobe seperation

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9secRR said:
i think your current cam is to big already. the cams that you posted are very close to the cam in my 414 W8 and there is no way a Trick Flow head will compare to a W8.
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While I agree, I do t think he has any illusions of W8 performance. IMO, the search here is for a better cam than he has with taking advantage of the ports capabilities. Once the overlap and power band are found for his combination he’ll be in good shape.
9secRR said:
B3422W5 has a 565 lift cam and runs 10.20's if i remember correctly and close to your race weight.

sometimes less is more.
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That’s true
 
rumblefish360 said:
While I agree, I do t think he has any illusions of W8 performance. IMO, the search here is for a better cam than he has with taking advantage of the ports capabilities. Once the overlap and power band are found for his combination he’ll be in good shape.


That’s true
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I wasn’t comparing W8 to TF, all I was saying is his heads won’t take advantage of a 670-700 lift camshaft.

I don’t see any head other then 360-1, 360-2, Victors, W8, and W9 that can use a camshaft over 660 lift.
 
With flow gains thru .700 lift, I’m not seeing any issues with the lifts for the recommended cams.

Not to mention that with the less than ideal 59* lifter bank angle, plus what you lose in the lash, those cams would be lucky to see a net actual .650” valve lift.

IMG_3759.png
 
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PRH said:
With flow gains thru .700 lift, I’m not seeing any issues with the lifts for the recommended cams.

Not to mention that with the less than ideal 59* lifter bank angle, plus what you lose in the lash, those cams would be lucky to see a net actual .650” valve lift.

View attachment 1716345039
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I agree. The only limit is the 5/16 bolts holding the shafts down. I try and stay under .700 lift with those.

For 3/8 bolts you can get to .800 lift but at that point a Jesel or T&D are the better option.
 
I’m not suggesting the combo needs the lift to be near .700……. I’m just commenting that I don’t see any issues with it per se.
But I do agree the 5/16 bolts are a problem if you plan on using a cam that needs “big” springs.

I’d use a cam where the TF springs could still be run.
 
10.40 at 3350 lbs is roughly 530 HP. with that big of a solid roller cam, heads that flow 320 cfm...... 620+ HP and it's not even close to that.

i just don't see what you guys are seeing or thinking it will do with a bigger cam.
 
9secRR said:
10.40 at 3350 lbs is roughly 530 HP. with that big of a solid roller cam, heads that flow 320 cfm...... 620+ HP and it's not even close to that.

i just don't see what you guys are seeing or thinking it will do with a bigger cam.
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Car weight is 3450 with me. Remember I came here looking for recommendations and gave my current specs. I’m not saying I need a cam with more lift, but this is the infor reputable cam companies are giving me. This is why I’m having a hard time picking a cam. Conflicting info from everyone. I believe I could use more duration and maybe a different LSA.
 
rslscobra said:
Car weight is 3450 with me. Remember I came here looking for recommendations and gave my current specs. I’m not saying I need a cam with more lift, but this is the infor reputable cam companies are giving me. This is why I’m having a hard time picking a cam. Conflicting info from everyone. I believe I could use more duration and maybe a different LSA.
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It's unlikely everyone is gonna agree.
 
rslscobra said:
Car weight is 3450 with me. Remember I came here looking for recommendations and gave my current specs. I’m not saying I need a cam with more lift, but this is the infor reputable cam companies are giving me. This is why I’m having a hard time picking a cam. Conflicting info from everyone. I believe I could use more duration and maybe a different LSA.
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it's a tough decision to make.

everyone has a different opinion, so it's not going to be easy to decide which opinion is the best one.

i would try a different converter before anything else.
 
You’d never know which is “best” without trying them all.

Just buy from a place you trust, and hope it works out to your satisfaction.

Just remember, this is something you “want”…….. the motor doesn’t “need” a new cam.

Let me ask you, in terms of just the cam swap, how much ET gain would you have to see to feel it was worth it?
 
PRH said:
You’d never know which is “best” without trying them all.

Just buy from a place you trust, and hope it works out to your satisfaction.

Just remember, this is something you “want”…….. the motor doesn’t “need” a new cam.

Let me ask you, in terms of just the cam swap, how much ET gain would you have to see to feel it was worth it?
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1 to 2 tenths
 
IMO, your current cam is short on duration for the application.
So I think there is some power left on the table.
At your current performance level, .10-.15 in ET is going to require 10-20hp.
I feel like that’s within reach.
 
One thing that hasn’t been brought up yet, which should be checked when adding as much duration as being discussed here, is……..before ordering a new cam……. Check to see what the V/P clearance is with the current cam.
With the data for the current cams LSA and intake C/L, along with the lobe lift at TDC, and the measured clearance……… the clearance for the new cam can be reasonably estimated.

If the current cam has tons of clearance(.150”+), then there shouldn’t be any issues with cams in the duration range being discussed.
But if the clearance is in the .100” range, you may not be able to add as much duration as desired.
 
I do agree that you do need more duration.
The bullet cam would be the one I would pick out of the ones you listed.

This is the cam that’s in my 414”.

IMG_0246.jpeg
 
PRH said:
One thing that hasn’t been brought up yet, which should be checked when adding as much duration as being discussed here, is……..before ordering a new cam……. Check to see what the V/P clearance is with the current cam.
With the data for the current cams LSA and intake C/L, along with the lobe lift at TDC, and the measured clearance……… the clearance for the new cam can be reasonably estimated.

If the current cam has tons of clearance(.150”+), then there shouldn’t be any issues with cams in the duration range being discussed.
But if the clearance is in the .100” range, you may not be able to add as much duration as desired.
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I checked PTV clearance at TDC, +/- 10 and 20 degrees. I am working with bullet. I don’t want to go larger than my current lift which is 660. Duration I think something around 268/274 with a 108 LSA should be close.
 
9secRR said:
I do agree that you do need more duration.
The bullet cam would be the one I would pick out of the ones you listed.

This is the cam that’s in my 414”.

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Would love to know compression, stall and shift RPM’s as I have a very similar grind from Comp that I’ll be running in a Victor headed 420”, 2800 lb duster (if/when I get my car back from bodyshop jail :()
 
dusterbing the peace said:
Would love to know compression, stall and shift RPM’s as I have a very similar grind from Comp that I’ll be running in a Victor headed 420”, 2800 lb duster (if/when I get my car back from bodyshop jail :()
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So as not to derail the thread, do you have any links to your build? I’ve been recently curious about the victor head option.
 
Garrett Ellison said:
So as not to derail the thread, do you have any links to your build? I’ve been recently curious about the victor head option.
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No build thread for the motor yet as I’m waiting for the car before putting a motor together to just sit on a stand, but can’t wait to start it!!!

Last mockup, I was checking port alignment:
1735512744275.png
 
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