This stuff is awesome, who would've thunk these little A motors would be crackin 900hp when they were bangin gears in their 340 Demons in 1971?

tell me about it i love small blocks

Me too

I love when they do cool things.... then I hurt something and wish I had a nice B1 low deck lol

That is some awesome parts at a good price, however it is an extremely narrow market... you have to have a narrow deck block and be willing to run very short pistons and rods or spin the beejebus out of a smaller displacment or find an unobtanium tall deck intake, you will still need a very expensive short block be it tall or short and you don't want to slap it on a stock block (well I do but I can afford it so thats a mute point). After someone spends $10,000 on that they are gonna think hard about an R5P7 ready to drop in with probably more potential. Someone will probably buy it at or close to you asking price but it may take a while.

"This is true, but to be fair it was killer air for here.

Can not believe nobody is inquiring about the W8 top end in the for sale section that produced these results"

I would love to take it off your hands but I am still knee deep in a Stratus build that seems to be never ending...

These high horsepower high rpm engines appear to have lots of durability issues and not probably the way to go for the weekly racer. A few bonzi hits in the Fall and a couple of Mopar racers a year maybe

My other w8 goes 8.90 been in car from 2011 till now.

Turn it 7800 rpm have not done anything to it other than change oil.

This same engine had 70 dyno pulls before engine masters then 5 hard pulls at engine masters.

So one you don't need big RPM
And 2 if build with quality parts they can give lots of runs.

Once again years mean nothing to me. I love and respect these Big, small blocks but the bottom line is, HOW MANY PASSES, not years. Several (fast) small block guys I know are making the switch to big blocks and the simplicity of running mid to low 8's and staying together.

FWIW on the heads up car the engine was just pulled at 88 passes. Still leaks down fince and compression test was good as well. It is getting destroked to drop some weight for the class we run. It makes 1054hp is shifter at 9600 and goes through just under 10,000rpm. We have broken a few valve springs along the way but are happy with it's performance. Was being freshened this yeah anyway but just saying it ran its best ever pass at the last race last year. We prefer to freshen before something breaks, So while certainly not bracket race type deal it has held up quite well with lots of RPM and really thin rings.

I have around 120 passes on mine now, nothing but normal maintenance,springs when needed, pac holds up very well, rods at 100 starts, now I'm going to put in new intake valves since I don't know how old they are, broke a rocker last summer, but thats it, 9000+ rpm

I have just under 2000, yes 2000 runs (in 2.5 seasons) on my 358 and haven't so much as adjusted a rocker arm. And yes, I buzz it every run, both in the water and throughout the run....9200 thru the lights. As for a bracket engine, I can't think of a better way to go. Oh, and thats 176 mph at 1800 lbs.

Mike

. Pretty sure you and I talked about your engine at Norwalk as I had a chance to get one cheap. You took the time to explain some of the needed work and expense of this type of build and I decided against buying one

I didn't really kill mine with RPM....didn't need to. I tried shifting it at 8500 and it wasn't any quicker than 8000 RPM shifts. The norm for me was shift about 7900 and trap 8000. This is not big RPM for a 1410 bobweight short block. It's not even big RPM for a short deck big block. They can and will live a nice life with the right short block under them.

Brett, those are impressive numbers!!

Just curious, how much lift, how much spring?

.900
.880
380 1100
350 980

I would think that's enough.
I see the air flow numbers stagnate at the top end of the run, which is often a tell tale of some instability in the valvetrain(I'm sure you know all that).
Was the rev limiter set well above 9000? I've forgotten to set the limiter high enough on more than one occasion.

We're you running Q16?

Dyno pulls at the 600 rate?

Yes I saw the air flow.

I don't think it was real bad. I have seen it drop air flow fast when it starts mash the valve train up. (I might be out of port cross section😜)

Yes q16

600 rpm a sec.

They use the lower correction factor (STD) I think that's the lower one.

Was only correcting 3% ish I saw raw numbers close to 890 HP

SHE BAD👍🏻

Using the fuel/bsfc numbers from the first pic, looks like 883.9 uncorrected for the 909 corrected......... That's about 2.8%.
No fluff there.

R5P7bantam I'm with you R5's are built from the main web up for RPM.

Not fair to compare to LA engines.

But, in their defense. I ran W8R3 for over 15 years. Ran Arrington headed R block before that. They are not high maintenance. I put thousand of miles and passes on the Arrington. It was built for 1000 Mile events in craftsman truck and arca. The W8 nitrous combo had a couple bugs early. Nothing serious just learning. No one was doing 457+ cubes with this stuff then. Once we got oil returning to pan if was pure joy. The 421 was turned 9,200 regularly. Once a year valve springs and aluminum rods. We hotlapped every weekend.

Look at the dyno sheets. Brett now builds more torque in the 7K range so the RPM can be run lower. Plus PAC springs outlast the triples three to one. I built all three of my engines far cheaper. Gas was also $1 a gallon. Builders wanted $30-40K back then. Keep making excuses. Truth is it's a pretty darn good combo and 200# lighter than big blocks.

To change the vibe, don't even get me started on how affordable R5P7's are at 800hp.