1 less horsepower than we made.(lol) We were making in the neighborhood of 620-640 if this helps.

 

i have seen 351's make way over 650
over on the turboforums there is a post about stock block 351's , quite a few in the low-mid 8's

 

mine is one of the ones off of turbo forums. it made 1073 hp and 1080 torque. it was half filled with hard block. that was also with a cast eagle crank. lasted 3 yrs

 

For what it is worth. I was at bessel motorsports a couple of months back when Jon Kaase called in an order for 6 SBF blocks with there new Bessel splayed cap design installed on each block. I believe when you see how these caps lock to the block you will be impressed as was jon kaase. These guys are going to be at PRI next month. They fly Stroker kits . com banner at their booth.Or call Ron or jason @ 636 946 4747

 

I HAVE A 1974 BLOCK 3/4 WAY BLOCK FILLED, MAIN GIRDLE AND LIFTER VALLEY GIRDLE. MAKES 580 HP. N/A AND 800 HP. ON SPRAY. NO PROBS.

 

Actually, John Kaase racing engines purchased 6 of our 460 blocks for the "Kaase P-51 520 c.i. Engines." Not the Small Block Fords. Just wanting to clear that up.

 

what is the cost on your caps, or do you only sell them installed? I would be 100% comfortable with my machine shop doing the work.

 

My 408 was a 1974, .030. It made 876rwhp @5500 with 16#'s with a 88mm.

Shane

 

I think the trick to making them work is starting with the 69 to 74 blocks. Zero balanced, studs, girdle, filled, and keeping the rpms low. Out of all the power adders the turbo is the easiest on the rotation assembly.

Next rebuild I will be curious to see my bearing and cap registers. Shooting for 8s this spring, already been 9.47 @ 3200lbs supercharged at 11lbs on a 393.

 

we have always filled the ones we are trying to go fast with up to the water pump holes and we also install 4 bolt caps from pro gram , the straight bolt ones . if you look at the early blocks 69-74 you can see that they have a boss there just like the cleveland blocks for the outer bolt , a splayed cap wont work because it wont have anything to grab into.

 

351 w

we have a 95 lightning roller block with a 76 making right at 700 rwhp in a 89 coupe at 3100lb. its been 9.40s at 145ish. no block filler, no splayed caps, no main support. we r gonna try for another 100 or so hp and ill let u know when it pukes the guts out. for what its worth i think the turbo stuff is a little easier than the blower or nitrous stuff for sure. hope this helps,Ryan

 

We just made over 700 at the tires with a Stock block 351W, with a girdle. This was on 14psi with a Precision PT88.

 

now thats some nice power, what heads were on this combo?

 

Had a 84 model block with main gridle made 670ish to the tires
before it broke.

 

We made enough on two different cars to run 5.0's in the 1/8 at 2900lbs with turbos. We half filled the blocks, used the Canton girdles, line hone them and had plenty of piston clearance. Both blocks lasted a year. one finally broke. Now running Dart blocks at 4.7's.

 

I've found that the main girdles hurt the blocks more than they help. The caps don't like being sandwiched between the block and girdle. The girdles promote cap walking, and will also crack the block in the main bolt holes. Best thing to do with a stock block, is get an early model block, put splayed caps and main studs in it. I've had several live at 1000+ hp. Just have to make sure that you don't detonate.

 

would a 69 block with 4 bolt caps be ok with around 800+ rwhp??

I want to go dart block but funds aren't looking like that is going to happen right now. I have a 69 block sitting in the garage. I really don't want to hardblock it.

 

It will be fine as long as you don't detonate it.

 

69-74 blocks are the only blocks we will install the 351W splayed caps on. The later blocks to not have enough material. Here is a link to one of our 74 blocks you will see there is plenty of meat for our caps. http://strokerkits.com/index.php?pa...lypage=flypage.tpl&product_id=117&category_id=16&option=com_virtuemart&Itemid=1

 

652hp NA w/300 hp spray, half filled with billet caps.

 

I've built several roller blocks w-just a steel main support making 700-800 fwhp no problems so far. and there driven on the street as well as raced almost every weekend. I think the main thing weather blown turbo or nitrous is your tune-up do everything you can to prevent detonation and it should live a long time.

 

5.46@129 @3000lbs 69block...4 bolt caps & no block fill