Is there on the internt a small block engne forum?

[blykins]

World block:



FRPP Boss block:

[Heo]

How good or bad is a later 5.0 Rollercam block?

The last 302 i built had a mexican truckblock
was probably out of a van looking at the transdipstick
so you know where you can find one

[Rory428]

For strength, the later 5.0 hydraulic roller blocks are about the weakest , but fine for mild, or even moderate racing. My 331 SBF  stock Hyd. roller 5.0 block lasted for 6 years of 10 second 1/4 miles, with a clutch, launching at highish RPM, with a 28 oz 3.25" stroker crank, before it split thru the mani webbing.I caught it in time, and "reblocked" all the same guts in a early 70s 302 block and ran it for 3 more years before I sold it, and got my Dart block 347 in the car.

[Rory428]

World block:



FRPP Boss block:

Brent, do all the World Product SBF blocks have provisions for 6 head bolts per cylinder? And if so, are they 7/16" or 1/2"? My Dart SHP block has only 4 bolts per cylinder, although they are 1/2"

[blykins]

Yes, they do.  The outside perimeter bolts are not 1/2".   It's a nice feature, but there's only 1-2 cylinder heads that have provisions to be bolted down like that. 

[blykins]

How good or bad is a later 5.0 Rollercam block?

It's a craps shoot.  Sometimes they go a long time, sometimes they split immediately.   I've had one, built into a 540hp 347, that's been in the customer's bracket car since about 2010.  Been freshened up once.  It's survived hundreds of passes, with 5500 rpm clutch drops and 7000 rpm shifts. 

This little baby is also a later model Explorer roller block, 311 cubic inches, 540 hp @ 7400 rpm. 

[Heo]

Blykins just curious, you that have built a few sbf what hp
do you guess i had in that. 030 over flatops ,10.5 CR
Ported milled 66 289HP heads with 1.90 1.6 valves. 308 deg/ 510 lift cam
think it vas 262 at .050 lift edelbrock performer rpm 650 dp holley
Hooker super comp headers, good machine jobs.  375??

[blykins]

Blykins just curious, you that have built a few sbf what hp
do you guess i had in that. 030 over flatops ,10.5 CR
Ported milled 66 289HP heads with 1.90 1.6 valves. 308 deg/ 510 lift cam
think it vas 262 at .050 lift edelbrock performer rpm 650 dp holley
Hooker super comp headers, good machine jobs.  375??

That's a whole lot of cam for the displacement, head, and intake, I would think 375 would be on the high side. 

[frnkeore]

Yes, if the .050 is indeed 262, that is way to much cam. That cam could get you 8k rpm, if the heads are big enough. You should be able to get 375 hp with a 232 cam.

The 289HP heads don't have any flow advantage, unported, they just have spring seats and screw in studs. Porting isn't easy on them either. Stock they flow about 165 and the best porters can't get above 240 cfm. I had a set of  C6 heads and after quite a while porting on the intake, schooled by a pro, I was only able to get 196 cfm with a 1.90 valve, good for close to 400 hp.

A EMC competitor, got 2nd place, in the last EMC with 294 ci, 235 cfm heads, dual plane intake and a 242@.050 roller cam for 440 hp @ 7.2k.

[Heo]

Blykins just curious, you that have built a few sbf what hp
do you guess i had in that. 030 over flatops ,10.5 CR
Ported milled 66 289HP heads with 1.90 1.6 valves. 308 deg/ 510 lift cam
think it vas 262 at .050 lift edelbrock performer rpm 650 dp holley
Hooker super comp headers, good machine jobs.  375??

That's a whole lot of cam for the displacement, head, and intake, I would think 375 would be on the high side.

Yes probably, In those times chosing parts was like ... as far down and to the right in the catalog was the best parts
only you that is old enough to have purchades from a catalog understand what i saying
And it was a Camdynamics catalog so you know how long ago that was. whatever hapened to Cam dynamics?
Must have went under in the late80s.

[Heo]

Yes, if the .050 is indeed 262, that is way to much cam. That cam could get you 8k rpm, if the heads are big enough. You should be able to get 375 hp with a 232 cam.

The 289HP heads don't have any flow advantage, unported, they just have spring seats and screw in studs. Porting isn't easy on them either. Stock they flow about 165 and the best porters can't get above 240 cfm. I had a set of  C6 heads and after quite a while porting on the intake, schooled by a pro, I was only able to get 196 cfm with a 1.90 valve, good for close to 400 hp.

A EMC competitor, got 2nd place, in the last EMC with 294 ci, 235 cfm heads, dual plane intake and a 242@.050 roller cam for 440 hp @ 7.2k.

Im abit unsure about that 262 was about 40 years ago, sound wrong to 308 adv 242 sounds more realistic  remember redline 7200 anyway