Thread: Hyd roller LSA question

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I waited 3 1/2 months from the time I ordered my custom hyd. roller camshaft until it was delievered. Many excuses were always given for the long delay. When the camshaft arrived yesterday I joyfully opened it only to discover another unwanted nightmare. When I reviewed the camshaft card I found out the specs for the duration and lift were right on however the hyd stick I ordered was TO BE ground on a 110 LSA but this the hyd. roller they sent me was ground on a 112 LSA. So my question is how much difference will the 112 LSA be from the 110 LSA. I know the idle will be smoother & possibly a little more vacuum, but how will the rpm range be effected?

the motor will make more power on the motor with a 110, i had mine ground on a 112 and it worked great with the nitrous. was so so on the motor.

it was .648/.648. .245/.255 @.050 i had it in a 427 made good bottom end power, but was all done by 6000RPM typical of hydraulic roller cams

The hyd. roller cam was custom ground at 231 & 239 duration @ .050 and the lift is 626 across the board. The camshaft like I mentioned was supposed to be ground on 110 LSA, but was mistakenly ground on 112 LSA. This is going into a 1970 LS6 454 which is running a 850 double pumper Holley and a turbo 400 with a stall converter. The custom cam grinder who has been in business many many years and was the former owner of Ultradyne Cams claims this hyd roller will make power to 6500 so I will be anxious to see if that really happens. This is going in a 1930 Model A roadster...I know it will never hook up but will be fun to get busy from a rolling start. My concern is to make sure I make the right choice since I am running strictly on motor without nitrous or a blower. I am wondering if I will have to end up running a vacuum canister because I was told this stick only puts out about 10" of vacuum and I am running Wilwood disc brakes on all 4 corners?

The problem with hydraulic cams is finding the corect valvespring. plus the lifters are sooooo heavy. Those 2 things keep them from making it to 6500 RPM.too much spring pressure and they bleed off too fast. I sold that 427, and am building a new 468 this one has a custom solid roller on a 112 LC. Again i did that because of the nitrous. i am looking to run this motor to 7000 RPM on th nitrous.

Originally Posted by stylingZ

The hyd. roller cam was custom ground at 231 & 239 duration @ .050 and the lift is 626 across the board. The camshaft like I mentioned was supposed to be ground on 110 LSA, but was mistakenly ground on 112 LSA. This is going into a 1970 LS6 454 which is running a 850 double pumper Holley and a turbo 400 with a stall converter. The custom cam grinder who has been in business many many years and was the former owner of Ultradyne Cams claims this hyd roller will make power to 6500 so I will be anxious to see if that really happens. This is going in a 1930 Model A roadster...I know it will never hook up but will be fun to get busy from a rolling start. My concern is to make sure I make the right choice since I am running strictly on motor without nitrous or a blower. I am wondering if I will have to end up running a vacuum canister because I was told this stick only puts out about 10" of vacuum and I am running Wilwood disc brakes on all 4 corners?

How is UD Harold these days?

you will not see much i think. you have nothing to compare it to you can move the cam try av it by 2 or send the damn thing back you paid for lsa110 and tell them that is what you want .

Eric UD Harold has sold Utradyne and now is the head camshaft guru at Custom Camshaft Co. That man really has a mountain of knowledge in his head and is good to deal with. I bought an Ultradyne flat tappet from him before including springs, retainer, and etc which I have never used. I decided to go with this hyd. roller cam instead. Also removing my new open pleniumn torq II manifold electing to go with a RPM air gap manifold. So many new unused parts to sell...I will be happy when this build is finished and I can enjoy the ole A-bone roadster.

Pat like you said I have nothing to compair it to. I have decided to ship the 112 LSA cam back and get the 110. Hopefully I will not have to wait forever to get the correct one. My LS6 454 is scheduled to be worked on Jan 1 to switch cams, make sure everything is perfect, and then break in this new engine plus run it on his dyno. I will be interested to see how it fares! Have a Merry Christmas Pat and if I lived closer I would have you do one of those oval exhausts for my 30 Brookville roadster. You sure do quality work & are free to share the wealth of knowledge you have about BBC.

Originally Posted by stylingZ

Eric UD Harold has sold Utradyne and now is the head camshaft guru at Custom Camshaft Co. That man really has a mountain of knowledge in his head and is good to deal with. I bought an Ultradyne flat tappet from him before including springs, retainer, and etc which I have never used. I decided to go with this hyd. roller cam instead. Also removing my new open pleniumn torq II manifold electing to go with a RPM air gap manifold. So many new unused parts to sell...I will be happy when this build is finished and I can enjoy the ole A-bone roadster.

About 15 yrs. ago when a few of us ran the "mud drags" we all ran Ultradyne cams.
Their tech. support was second to none.