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  #16 (permalink)  
Old 05-13-2010, 04:02 PM
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or should i go with something like this:
http://www.lunatipower.com/Product.aspx?id=2152&gid=287

or what do you think about going to a xtreme energy 294HR cam? (http://www.compperformancegroupstor...e=MARKIVCAMHRXE)

i heard you can go roller with more duration and still be more streetable. it would be like an extra $550, do you think i would be worth it in the long run?

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  #17 (permalink)  
Old 05-13-2010, 04:13 PM
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If this was my car I would put a complete comp mechanical street roller cam +kit in it.
These comp kits are atractively priced. The solid roller lifter stuff works the best in BBC's.

comp cam +kit #K12-771-8

This is the goldie locks street cam for your car with a 3000 ish stall and 3.42-3.73 gears.

Put a 850 on it. if it was me I would build my own 950 HP/Proform carb starting with a good rebuildable donor 650cfm+ holley DP and upgrading with Proform parts. (carb body+billet base).
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  #18 (permalink)  
Old 05-13-2010, 04:22 PM
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Quote:
Originally Posted by F-BIRD'88
If this was my car I would put a complete comp mechanical street roller cam +kit in it.
These comp kits are atractively priced. The solid roller lifter stuff works the best in BBC's.

comp cam +kit #K12-771-8

This is the goldie locks street cam for your car with a 3000 ish stall and 3.42-3.73 gears.

Put a 850 on it. if it was me I would build my own 950 HP/Proform carb starting with a good rebuildable donor 650cfm+ holley DP and upgrading with Proform parts. (carb body+billet base).
yeah i was thinking about mechanic roller or even flat tapped cams but i don't want to adjust it every month or so.

so you don't think a hyd roller would be a nice "goldie" locks street cam?
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Old 05-13-2010, 04:37 PM
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Quote:
Originally Posted by Jason7504
yeah i was thinking about mechanic roller or even flat tapped cams but i don't want to adjust it every month or so.

so you don't think a hyd roller would be a nice "goldie" locks street cam?
Where did you get the idea you would have to adjust the valve lash every month? This is a myth on a street mechanical cam.
once maybe twice a year the valve covers come of for routine maintaince valve lash check. At most, a few of the valves will need minor lash touch up.

I just did a upgrade with this cam in a friends 396 bbc. After a inital lash check after initial engine break in it is still not ready for a valve lash adjustment 1 year later. These cams are designed for the street environment. They are not hard on the valvetrain. They are not hard to maintain. They outperform the hyds In all respects especially on BBC's.
The idle sound is boss. You really have to listen close to hear the solid lifters at idle. I set the lash "cold" .002" tighter than cam card spec.
My friend is very happy that I bent his arm to go with this street mechanical cam. The power and torque gain over a hyd is impressive.
Well worth the once/twice a year, 20 minute lash maintainance.
You do change your oil and check tire pressure don't you?

When I ran BBc's I always used a solid lifter cam in them.
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  #20 (permalink)  
Old 05-13-2010, 06:07 PM
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Quote:
Originally Posted by F-BIRD'88
Where did you get the idea you would have to adjust the valve lash every month? This is a myth on a street mechanical cam.
once maybe twice a year the valve covers come of for routine maintaince valve lash check. At most, a few of the valves will need minor lash touch up.

I just did a upgrade with this cam in a friends 396 bbc. After a inital lash check after initial engine break in it is still not ready for a valve lash adjustment 1 year later. These cams are designed for the street environment. They are not hard on the valvetrain. They are not hard to maintain. They outperform the hyds In all respects especially on BBC's.
The idle sound is boss. You really have to listen close to hear the solid lifters at idle. I set the lash "cold" .002" tighter than cam card spec.
My friend is very happy that I bent his arm to go with this street mechanical cam. The power and torque gain over a hyd is impressive.
Well worth the once/twice a year, 20 minute lash maintainance.
You do change your oil and check tire pressure don't you?

When I ran BBc's I always used a solid lifter cam in them.
oh i just heard some people say it. oh wow well 1 or 2x a year isn't bad. yeah i just listened to some videos with them and they sound pretty bad ***** yeah i change my oil and check my tire pressure
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  #21 (permalink)  
Old 05-13-2010, 07:54 PM
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if you have the money a roller set-up would be better on a bbc
if not at least groove the lifter bores
i think a flat tappet would be ok and you can spend the money somewhere else on the car
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Old 05-14-2010, 10:48 AM
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with a 3000 rpm stall you don't need to worry about low rpm power. That is why you are using a 3000 rpm stall convertor in the first place.

like I said, I would not use any XE cam. as they are "xtremely" likely to go flat.

10:1 cr is good for a 292H cam, 3000 stall, and a 3.73 in a BBC. With short 26 inch tires then you could get by with a 3.42 gear.

give us the head casting numbers and the piston part number and then we will talk.
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  #23 (permalink)  
Old 05-14-2010, 02:11 PM
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I'm gonna go with the comp extreme energy mechanical roller 280 cam (http://www.compperformancegroupstore...MARKIVCAMMRCXE)

it should be good with my 10:1 cr and 3000 stall. I might go with 3.73 gears too since it says 3.73+

do you think i could still get away with 3.42 gears with my 26" tires with this cam?
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Old 05-14-2010, 02:41 PM
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a 3.42 gear a 26 inch tall tires is like a 3.68 gear with 28 inch tall tires. so, yes, a 3.42 gear should be OK with short tires.


I would use a little more cam with 10:1 cr.

however, not sure you have 10:1 yet. For example. a 10:1 cr piston in a 468 with 100 cc heads is a 9.23:1 cr engine with 110cc heads, and 8.6:1 cr with 120cc heads. that is why I'm asking for the piston part number (or dome size) and the head casting number to double check the cr calculations.
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Old 05-14-2010, 02:43 PM
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For max performance you want 3.73's or 4.10's.

yes the 3.42 gear will do.
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  #26 (permalink)  
Old 05-17-2010, 12:40 PM
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Quote:
Originally Posted by 454C10
a 3.42 gear a 26 inch tall tires is like a 3.68 gear with 28 inch tall tires. so, yes, a 3.42 gear should be OK with short tires.


I would use a little more cam with 10:1 cr.

however, not sure you have 10:1 yet. For example. a 10:1 cr piston in a 468 with 100 cc heads is a 9.23:1 cr engine with 110cc heads, and 8.6:1 cr with 120cc heads. that is why I'm asking for the piston part number (or dome size) and the head casting number to double check the cr calculations.
ok here's the info:
the piston is a SRP 212136 domed with 336781 head with 2.19in 1.880 ex valves 118cc chamber which should put compression at 10.1:1
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  #27 (permalink)  
Old 05-17-2010, 06:02 PM
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I've run a bunch of BBC DynoSims and F-BIRD'88 is correct about using a solid roller. It just wakes up the motor and makes incredible power. I've found that the one to use is a cam that is actually designated for use as a puller or mud bog application. It's the 11-700-9 and seems to be in the sweet spot on a BBC anywhere between 9.0:1 and 10.0:1 with a 3000/3200 converter.
Here's the cam card....
http://www.compcams.com/Cam_Specs/Ca...?csid=508&sb=0

Here's a DynoSim of this motor at 468 inches, stock 781 heads, 2.19"/1.88", large-tube headers through the mufflers, 850 carb on a RPM or Stealth intake.

RPM HP TQ
2000 173 455
2500 223 468
3000 283 500
3500 362 543
4000 440 577
4500 511 601
5000 564 592
5500 596 569
6000 603 527
6500 580 468
Peak volumetric efficiency 96.3% @5000
Peak BMEP 192.8 @4500
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  #28 (permalink)  
Old 05-17-2010, 07:18 PM
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Quote:
Originally Posted by techinspector1
I've run a bunch of BBC DynoSims and F-BIRD'88 is correct about using a solid roller. It just wakes up the motor and makes incredible power. I've found that the one to use is a cam that is actually designated for use as a puller or mud bog application. It's the 11-700-9 and seems to be in the sweet spot on a BBC anywhere between 9.0:1 and 10.0:1 with a 3000/3200 converter.
Here's the cam card....
http://www.compcams.com/Cam_Specs/Ca...?csid=508&sb=0

Here's a DynoSim of this motor at 468 inches, stock 781 heads, 2.19"/1.88", large-tube headers through the mufflers, 850 carb on a RPM or Stealth intake.

RPM HP TQ
2000 173 455
2500 223 468
3000 283 500
3500 362 543
4000 440 577
4500 511 601
5000 564 592
5500 596 569
6000 603 527
6500 580 468
Peak volumetric efficiency 96.3% @5000
Peak BMEP 192.8 @4500
is that with the comp XR280R roller cam that i posted a link too?
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  #29 (permalink)  
Old 05-17-2010, 07:22 PM
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Jason, for one time in my life, I'm at a loss to say anything.
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  #30 (permalink)  
Old 05-17-2010, 07:27 PM
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Quote:
Originally Posted by techinspector1
Jason, for one time in my life, I'm at a loss to say anything.
what do you mean?
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