[67428HO]

Hi has anyone used a Lunati hyd. roller 262/270 -211/219@.50 with a .507/.515 lift and what did you think of it? Thanks

[tom s]

Most people dont get rollers that small!

[David Jones]

What would you put it in?

[i82much]

How much does the trailer weigh?

[Dick Boneske]

That's the Lunati #LUN-20510710LK. We put that in our '68 Firebird 467 engine with E-heads and '66 Pontiac Tripower and Ram Air setup. Butler recommended this cam because we wanted to retain power brakes. Car has 4.11 gears and 3500 rpm converter with TH400.

Idle is about 700 rpm with 15" vacuum. Low and midrange torque is awesome. It pulls stongly a little beyond 5,500 rpm, which is where we set the MSD limit.

We'll know more later, but not regretting this choice. Most Pontiac engines, in my opinion, end up with too much cam. This cam takes advantage of huge midrange torque.

[i82much]

Originally Posted by Dick Boneske

That's the Lunati #LUN-20510710LK. We put that in our '68 Firebird 467 engine with E-heads and '66 Pontiac Tripower and Ram Air setup. Butler recommended this cam because we wanted to retain power brakes. Car has 4.11 gears and 3500 rpm converter with TH400.

Idle is about 700 rpm with 15" vacuum. Low and midrange torque is awesome. It pulls stongly a little beyond 5,500 rpm, which is where we set the MSD limit.

We'll know more later, but not regretting this choice. Most Pontiac engines, in my opinion, end up with too much cam. This cam takes advantage of huge midrange torque.

Goodness, 4.11's with a 467 and a 211@.050 cam! That is really taking the tractor motor approach to a new level, that thing would tow like a Duramax!!!

[67428HO]

It started out as stock rebuild for a 68 Firebird 400 ,then trying to reduce compression lead to dished pistons which lead to a 461 rotating assembly since it's the same price and I need the crank cut and balanced. Then talked with Butler and that's the cam they suggested with A/C Power brakes and steering and iron intake and exhaust manifolds with a q- jet.3:36 gears and a 4 speed.I was wondering if someone else had this combo? Thanks

[67428HO]

Also what kind of quality the Lunati had.roller lifters are?

[i82much]

Originally Posted by 67428HO

Also what kind of quality the Lunati had.roller lifters are?

I cannot speak to the Lunati lifters, but I have heard that the current version of the Comp 857 are much improved. I went through this process recently and went with the Comp lifters.

[Dick Boneske]

Bringing back this old thread. We're building another '68 'Bird with a 428, .040 over (434). It will have D port E heads, 9.5:1, hydraulic roller cam, Ram Air cast iron exhaust manifolds, FI (brand), 2004r, same 4.11 gears as in the 2016 project. It will have power disc brakes, Vintage Air. The car belongs to my step daughter, the wife of my son-in-law who drives the other '68 in this thread. So, a torque monster is what we're looking for.

We're contemplating taking the 20510710LK and putting it in this new project's engine. The roller lifters are noisy when the engine warms up. I have not yet spoken with Butler about whether we can fix the lifter problem while swapping cams.

In spite of the comments made about the cam being too small for the other car, we are pleased with how it pulls to 5,500 rpm. If you have suggestions for the next larger Voodoo HRC or two steps up, that will work with power brakes, let me know.

The first picture is of the original red '68, the second of this project, the third of the engine "before."

[77 TRASHCAN]

Originally Posted by tom s

Most people dont get rollers that small!

Would be a good cam for a well built 350...

[Formulajones]

That's the same voodoo cam they recommend for a bolt on mod for the little 302 Ford EFI engines, as they don't require any computer tuning to work in an SD application, and the MAF version easily compensates for it.

I actually view it as small for the 302 (I mean it works with a computer controlled engine without mods) I would normally look at something in the 220's @ .050 for a little engine like that.

I'd be interested to hear how it works in a large CI Pontiac application, I'd like to see it on a dyno.

Many years ago I did what I considered a very small 218/224 in an otherwise bone stock Dport 428 and it did 301/355 at the rear wheels through a 400 turbo and 12 bolt. It was all done at 5,000.

[Dick Boneske]

Originally Posted by Formulajones

That's the same voodoo cam they recommend for a bolt on mod for the little 302 Ford EFI engines, as they don't require any computer tuning to work in an SD application, and the MAF version easily compensates for it.

I actually view it as small for the 302 (I mean it works with a computer controlled engine without mods) I would normally look at something in the 220's @ .050 for a little engine like that.

I'd be interested to hear how it works in a large CI Pontiac application, I'd like to see it on a dyno.

Many years ago I did what I considered a very small 218/224 in an otherwise bone stock Dport 428 and it did 301/355 at the rear wheels through a 400 turbo and 12 bolt. It was all done at 5,000.

This one in a 467 with RAIV E-heads, 3500 converter, TH400, 4.11 gears, Doug's 1 7/8" headers, 9.6:1 pulls like crazy to 5500 rpm. Unbelievable torque. Why would I want it to make HP above 5500 on the street?

[Stan Weiss]

Does anyone know what the 0.200" duration is for these lobes?

Stan

[Steve C.]

262 / 270
211 / 219
112 / 106
.507" / .515"

Rpm range 1400 - 5400

Older Lunati catalog in the Pontiac section.....

"Strong increase in low RPM torque and HP. Great inboard/outboard marine cam for economy and sking."

The 4.11 gears affects the seat of the pants feeling




.

[Formulajones]

Originally Posted by Dick Boneske

This one in a 467 with RAIV E-heads, 3500 converter, TH400, 4.11 gears, Doug's 1 7/8" headers, 9.6:1 pulls like crazy to 5500 rpm. Unbelievable torque. Why would I want it to make HP above 5500 on the street?

And I would say to that, why not?

Actually, you can do a much larger camshaft, and if chosen properly will make gobs more power and still be within your rpm limit.

I just did a 455 (467) Pontiac, and used a custom Lunati roller with Voodoo lobes, 239/243 @ .050, even used stock ram air manifolds, stock intake and carb, and it made 507/571 on the dyno, with more than 500 ft lbs. everyplace, and it was all done at 5700 rpm, and idles like a pussy cat. Pulls like crazy everywhere. When it goes to the track, I'm betting from my own experience with this stuff, it won't make much difference, if any, shifting it at 5,000 rpm or 5700 rpm.

Not saying you made a bad choice, just curious as to why and what it made on the dyno.

On a side note, the voodoo cams do tend to stretch the rpm out further than one would expect when just looking at the cam card numbers. Paul dyno's a ton of these engines with Voodoo lobes, basically Harold cams, and they have proven to have a very broad power curve for their size.

[Stan Weiss]

Originally Posted by Dick Boneske

This one in a 467 with RAIV E-heads, 3500 converter, TH400, 4.11 gears, Doug's 1 7/8" headers, 9.6:1 pulls like crazy to 5500 rpm. Unbelievable torque. Why would I want it to make HP above 5500 on the street?

What it really come down to is are you happy with the cam? Other people maybe running a different cam that they are happy with it but that does not mean you will be happy with their cam just like they may not be happy with your cam.

Stan

[Cliff R]

"Actually, you can do a much larger camshaft, and if chosen properly will make gobs more power and still be within your rpm limit."

+2

Below are two dyno runs from the same engine. Cam #1 was the XR 276 HR cam from Comp. It was DONE by 4800rpm's, made OK power but pinged on pump gas. The heads flowed 250cfm and compression was only 9.2 to 1. A very good example of how a small cam on a tight LSA can be too good at cylinder filling too early in the RPM range.

The second cam made more power everyplace and pulled to 5800rpms to make peak power. It also idled better than the smaller cam on a tighter LSA and the owner of the vehicle is extremely happy with the street manners of the larger camshaft.......FWIW......Cliff

[Stan Weiss]

What is a tight LSA? The OP's cam should be on a 112 LSA. Also Adv duration and 0.050" duration are only some of the think that should looked at. Area under the curve also come into play. The Op's cam has .507" intake lift the 704 has .504" intake lift. Must be a pretty aggressive lobe to do that.

Stan

[Dick Boneske]

Originally Posted by Cliff R

"Actually, you can do a much larger camshaft, and if chosen properly will make gobs more power and still be within your rpm limit."

+2

Below are two dyno runs from the same engine. Cam #1 was the XR 276 HR cam from Comp. It was DONE by 4800rpm's, made OK power but pinged on pump gas. The heads flowed 250cfm and compression was only 9.2 to 1. A very good example of how a small cam on a tight LSA can be too good at cylinder filling too early in the RPM range.

The second cam made more power everyplace and pulled to 5800rpms to make peak power. It also idled better than the smaller cam on a tighter LSA and the owner of the vehicle is extremely happy with the street manners of the larger camshaft.......FWIW......Cliff

Wow! What a difference. Makes me wonder how my son-in-law's 467, RAIV E-Heads with the 701 Voodoo would do with the 703. We went with the 701 due to concerns with power brake vacuum. Butler recommends the Comp Cams #8022 SP--similar to the RAIV but with slightly more lift and duration. Butler also says we could quiet the valve train with Johnson HR lifters #211OP. There are no detonation issues, but we always run 93 octane pump gas with a little race gas added ($7/gal). What do you think?

Here's how it runs now. https://www.youtube.com/watch?v=u4y0OfO9RuA