sbc solid roller cam for street

[danta]

To get more vacuum at idle, just raise your idle speed-PRETTY SIMPLE !ok ,so if my cam rpm range is 2500-6500 i set my idle at 2500 and i will have enough vacuum for my brakes is that correct ?



JOE SHERMAN RACING

[F-BIRD'88]

Your 236-242 110LSA street roller cam wil run fine with power brakes.
One key is to set up the distributor so that when idlign in gear the spark timing does not drop
with rpm and manifold vacuum in gear. ( automatic trans with high stall converter)
The Comp XR274R-10 (236-242 110) street roller would be a good one. You can even tweek it a bit with a custom grind 106 or 108 LSA for a bit more torque.
The next bigger duration XR280R-10 280-286 242-248 110 cam will also run with power breakes too.
on this one lock out the distributor advacne curve to max idle vacuum.
Idle about 1000 rpm 900 in gear.
The next cam XR286R-10 gets marginal w power brakes but can still work.

I have run bigger cams than all these with power brakes and auto trans in street cars.
Add a auxillary electric vacuum pump if your Bigly cam choice gets out of hand.
EG: the XR292R-10 roller cam.

Your 236-242 110 LSA solid street roller cam should rock w power brakes.
its just not that hairy. Car setup matters a lot.

[MadBill]

To get more vacuum at idle, just raise your idle speed-PRETTY SIMPLE !



JOE SHERMAN RACING

And you'll NEED more brake vacuum, if that 2500 RPM idle's with a low stall automatic..

[pdq67]

I guess that I would see if CC has a small block solid street roller spec'd like the good old big block 288AR cam.

Plus, I would probably use the needle-less solid roller lifers that are out nowadays so I wouldn't eat a bunch of needle bearings when one of them lets go.

pdq67

[Belgian1979]

I agree with NewOld1
I have a Dick Jones cam with Morel 4602 lifters running pac springs that Rick picked out and my engine runs to 7300 easily.
6000 rpm is old wives tell....
Tom

Something about weight, lifter pump up etc. But I forgot who said that.

[bigjoe1]

Remember this-- hydraulic rollers are for girls !




JOE SHERMAN RACING

[statsystems]

Remember this-- hydraulic rollers are for girls !




JOE SHERMAN RACING

Good one Joe!!!

[Monza355]

I'm doing a similar change to my 9.7:1 350 engine. I'm taking out a 244/252 on 106 Lsa solid flat tapper and swapping it out for the XR 236/242 on 110 lsa solid roller grind mentioned above. By doing so I'm hoping for better drivability without loosing power..

[user-17438]

I guess that I would see if CC has a small block solid street roller spec'd like the good old big block 288AR cam.

Plus, I would probably use the needle-less solid roller lifers that are out nowadays so I wouldn't eat a bunch of needle bearings when one of them lets go.


pdq67

If the lash doesn't get out of control, a regular needle bearing style will last just fine. It's funny how I have engines out on the street with .750-.850" on needle bearing solids for 10+ years and not an issue. But people critique others on their builds because they don't have the newest generation parts, and tell them the old stuff simply doesn't work. I inform my customers to check lash regularly. I see more rocker arm failures then lifter.

In my opinion talk to a real engine builder, or a Cam grinder and not a salesman.

[CamKing]

I'm doing a similar change to my 9.7:1 350 engine. I'm taking out a 244/252 on 106 Lsa solid flat tapper and swapping it out for the XR 236/242 on 110 lsa solid roller grind mentioned above. By doing so I'm hoping for better drivability without loosing power..

Unless you're adding over .100" lift too, you'll probably lose power.

[bigjoe1]

I never have roller lifter problems with the old style either. Maybe I just have smarter engine customers



JOE SHERMAN RACING

[Newold1]

We see so much conversation about STREET/STRIP , STREET only and STRIP-RACE only and lots of different engine questions and suggestions based on these terms that I think I will start a new thread where we all try to better define what these different uses really mean. I think using these terms so generally based on all the different ideas of what they really mean is like duck hunting with a NERF Ball gun. You can shoot at em but you ain't gonna hit em very much!

As for girls only using hydraulic roller performance camshafts, we sure got a large percentage of performance and racing enthusiasts that spend most of their time in skirts! Don't think so!

Nice try Joe, No Cigar!

[redliner]

Remember this-- hydraulic rollers are for girls !


"There is no substitute for EXPERIENCE!!! WELL SPOKEN!!!! THIS....is why YOU are BIGJOE!!!!


JOE SHERMAN RACING

[cv67]

Danta, have same size motor solid rollerover 20 degrees larger and the car stops great. Have a plain ol vacuum reservoir tucked up under the fender.
To compare its no worse than a XE284 hydraulic flat tappet...but makes a ton more power. Come to think of it the Isky 280 mega made more power (or at least felt that way)lol

[Monza355]

I'm doing a similar change to my 9.7:1 350 engine. I'm taking out a 244/252 on 106 Lsa solid flat tapper and swapping it out for the XR 236/242 on 110 lsa solid roller grind mentioned above. By doing so I'm hoping for better drivability without loosing power..

Unless you're adding over .100" lift too, you'll probably lose power.

No only about .050" more lift. But over .600" with the solid roller. For curiosity What makes you think it will loose power ? The decrease in duration or the increased lsa ? Or maybe bit of both ? The solid roller is larger at .200" so it should have more area. 159/164 vs 152/160 on the sft