We ran the car last night with the solid lifters on the hyd cam (roller)

For those interested:
534" 69 Camaro weighing 3700 lbs w/driver running 93 octane.

Ran 10.12 ET @ 133 MPH

A new best!
So far it`s working out ok.

Just wanted to post

Compression? heads? cam specs? thanks BigRed

Rapid Robert;
10.25-1 compression
Dart 325 rec port heads.
UD single pattern cam: 255 @ .050 .650 lift 110 sep lashed .000 (cold) with the solids.

Hey that's great news! I asked about this a week or so ago because I was debating the swap. What rpm improvement did it have? Roughly what rpm is that motor peaking at? Seems like a pretty mild cam for that size engine, but it sure is working out! I wonder how it would work out with a dual pattern, say 248/254 in a 498"? Fat Tony.

The rpms being at 6700-6800 are a few hundred rpm over what I would feel comfortable with in a big block with hyd lifters by about 300-400 rpm.

So the usable rpm range has been extended IMO.
BTW,we`re talking 130 lbs seat pressure that`s all.

Peak power 5800-6200 just to guess.

Whats the point of that? why not run a solid cam? does it change the need for high spring pressures? i would think not. Or was it just an idea, and you didn't feel like taking the cam out?

The point is, this is just an experiment, period.
So far, the car is running very well IMO.

Why run a solid roller with it`s elevated spring pressure when you can run hyd F/T type pressure and wing it 6800 rpm if needed in a heavy valve big block no less!

Do you see a down side to this setup?

This isn`t a track car btw, no trailor ever, driven to and from the track with 3.73 gears fill up at the pump with 93 octane and go.

What`s not to like about it?
Do a search on "solid rollers for the street" or whatever, and you might see where we`re at with this setup smile.gif

Believe me, changing a cam is nothing!!

We have no problems going full solid if needed.

When you`re as close as we think we "might" be to sqeaking a 9 sec time slip out of this setup and having fun at the same time while working within these self imposed parameters of ours(no solid roller yet), just makes it all the more interesting.

smile.gif smile.gif

That hydraulic cam must be snapping those valves open really fast at zero lash and with no clearance ramp like on a solid cam. I think I remember UDHarold suggesting .006 lash when doing this trick, but I may be wrong.

well i sure wasn't trying to push your buttons, but i must of pushed the top floor! I was just asking why? Good point about the rpm thing and the heavy lifters. Don't know how that passed me. SO the main benefit would be from a higher rpm motor? BTW i didn't say i didnt' like it smile.gif

Actually, near zero lash lifts the valve smoother.

cody..Please don`t misread my reply. Trust me, no buttons where pushed graemlins/thumbsup.gif .
The higher rpm ability is only an added benefit, no need to buzz it up if the cam`s not there anyway.

Originally posted by baddbob71:
That hydraulic cam must be snapping those valves open really fast at zero lash and with no clearance ramp like on a solid cam. I think I remember UDHarold suggesting .006 lash when doing this trick, but I may be wrong. The clearance will be between .004 & .006 when hot ;)
The only part I find amazing is the spring pressure especially with rat.

What lifter, retainer & spring is it?
Kinda goes against everything I have seen but that MPH don't lie, at 3700lbs it is 700+HP in the car at the flywheel which ain't exactly shabby for a driver graemlins/beers.gif

I'm guessing the driver weighing in at 275lbs? Thats a heavy '69. Mike if you're listening, would you try a set of Isky solid rollers on my XR300HR-10? Perhaps after the engine is fired, broken in a bit and put thru her paces; we'll do a camparison of our own. Tony.

Mike the lifters are tall (+.300) Crane horizontal, Trick titanium retainers and Lunati springs.

chevywidow.. Not at all, driver weighs 180 lbs

It`s not a heavy 69 Camaro it`s what they weigh when it has a full factory stock interior including sound deadner, a roll cage and frame braces and supports. A TH400 and a big Dana 60.

Cars weighs 3560 LBS sans driver smile.gif

Awesome times BigRed graemlins/thumbsup.gif That Camaro is making some power! Can you post all the incrementals for that run? What were the weather conditions like for that pass?

Thanks Ken.
Here`s the run:

60ft- 1.458 et
330 - 4.142
1/8 - 6.439 et @ 106.91 mph
1000 - 8.430
1/4 -10.123 et @ 133.01 mph

weather was avg for this time of year here.

At just a tick before 7:00 it was about 70 degrees
and about 60-70 % humidity.

The track for real sits in the middle of a swamp so the humidity reals starts to build as the night progresses.

Originally posted by chevywidow:
I'm guessing the driver weighing in at 275lbs? Thats a heavy '69. Mike if you're listening, would you try a set of Isky solid rollers on my XR300HR-10? Perhaps after the engine is fired, broken in a bit and put thru her paces; we'll do a camparison of our own. Tony. ============

Thanks Red, still amazes the hell out of me how that light spring is controlling the closing of the valves, especially the intake,,, you didn't sneak a set of Titaniums in there did you?? :D :D

Really nice thing is you can run the cast core roller & should have no problems.

Me thinks Harold did a pretty fair job on that lobe graemlins/thumbsup.gif
=============

Tony,
Without more spring I think the XR lobes are going to have a problem.

Unless the acceleration is slowed down on closing they are going to bounce off the seat.

They are very aggressive & while they will make good power I believe they close the valve pretty fast like all the XE type lobes do & I feel will take more spring to control.
I have had trouble with them on the dyno getting them over about 6200 reliably & that is in a 406 small block with steel retainers, 140/ 360 springs with a rev kit which added about 30 closed & 80 open lbs.

I just changed the cam a couple of weeks ago after about 2000 miles because of another problem & the lobes were already tracking with this pressure but this was a standard -8 core which is the cast one which I don't normally use.

The cam that went in is an Isky & without the rev kit & the same spring it went to 6400 with no problem & I think would have gone further but the power was over the peak.
So,, it's all about the lobe design.

Opening the valve is a piece of cake,,, closing it is a whole different deal ;)

Hey Mike, thanks for following the post. Always good advice. Aren't you outta here tommorrow? Have fun! Tony.

I'm impressed with the performance. That's my kind of car, drive it in, drive it home and fill it with super!
As far as weight, everyone thinks Camaros/Novas are lighter than they actually are. I have hed more than a few guys with cars identical to mine tell me they weigh 3100.....I always wonder were they weigh them! Ha!
Ron (the 498 is nearing completion)

Ron454..thank`s, you`re right about the weight deal but it`s simple to prove...just pull up to the scales and show`em.

BigRed-L72,

You da MAN!! Keep saying "9's" over and over as you go to sleep. McMinn will do it this new year for sure...
And I believe that is a billet cam, I never used any cast roller cores.
I have been working on VooDoo hydraulic rollers for several weeks now. The biggest I have in the BBC line is a 294/302 at .006, 241/249 at .050, and .625/.625 valve lift. LSA will be 112. Other, larger HR cams will be done, but not under the VooDoo name. I also have a 284/292 at .006, 231/239 at .050, .600/.600 valve lift and 112 LSA that will be very popular. They should be in good supply by the end of January.
I also have a VooDoo 276/284 solid, but that's at .015 or .016. It's shorter at .020, and still 243/251 at .050, with .590/.614 valve lift, 110 LSA, and valve lash around .018" hot.
All these, and the others, VooDoo hydraulics, hydraulic rollers, and solids, should be ready by the end of January, middle of Feburary, in Jeg's and Summit, etc. Ads should be in January issues of some of the magazines.
I also have a new 310/318 BBC roller for you 9-sec guys.....
310/318 at .016
305/313 at .020
277/285 at .050
199/206 at .200
lobe lift is .4164/.4164, valve lash is .018/.018.
The masters are sitting on my desk.......
Sorry to hijack the thread this way, but I just got my computer back, and I've been away soooo long.....

UDHarold

Harold,
I have a .710 300/310 R8 bbc cam thats hurt,can this be reground into something bigger??
I was never really happy with it.
thank you

1968 hot rod,

Sure.
Send it in to Lunati, to my attention. Include your phone number, I'll call after I get the cam...

UDHarold

Thanks Wolfplace!

We weighed some lifters just to see the weight difference.

Going off the top of my head here; the Comp Hyd rollers came in at something like 290 grams for a pair.
Isky solid rollers were around 250 or so.
A set of Crane std length, spring loaded ones were 192 grams I believe.

The taller versions were 202 grams.
Not exact numbers, I don`t have our book with me.

Thanks UDHarold...we might get there after all..MIGHT smile.gif

graemlins/thumbsup.gif

AWESOME! And made more so by your "out-of-the box" thinking!

Thanks 427 smile.gif

when you went from hyd to solid lifters did your push rod length change/ i am considering doing this on my hyd roller. ty

Yes, the hyd pushrods are shorter.
I use an adjustable pushrod length checker to get them right.