Respect the work put into these videos, this channel is a goldmine of info.

No substitute for good measuring especially after getting a crankshaft machined. plastigauge won't tell you reliably if your crank guy is sloppy after a few bad shops I learnt not to trust.

Folk still hunt 049/781s. They don’t care about max hp unfortunately. I’d at least get some dart iron eagles

Great video Richard! The dirty little secrets to grassroots hot rodding.

Hi Richard, You create a lot of exciting tests with different camshafts, cylinder heads, turbos, superchargers, etc. Have you ever tested setting up two relatively small superchargers in series and then comparing the horsepower increase against a single large supercharger? Alfa Romeo did this in the 1950s and managed to get an incredible 450 HP from a 1.5-liter engine. This was also common in aircraft during WWII but has disappeared nowadays. I can't find anyone on KZbin who has done any dyno tests with two superchargers in series. It would be incredibly cool if you could put together such a setup!

My 88 Vette ran like a raped date to 4800 then fell off a cliff.

I remember on the Toyota 22R with a manual transmission you had to put it in neutral when at a stop light and when coming to a stop to prevent it from wearing out the thrust bearings. I have seen a few drop the bearing and cause destruction of the block. The 20R didn't have that problem because the bearing was part of the main bearing.

I’ve machined my crank and no1 main cap for a Torrington thrust bearing on my 6.0l LS It utilises the stock thrust and the Torrington at the same time.

Are there ANY Aftermarket cylinder heads and cam combos for the GM. 6.6 GAS ENGINES yet ?

Yes absolutely it works. Once we've made our parts and are happy with the readings from the cmm and surface finishes/hardness are within spec, it's always worth using plastigauge on final assembly just to make sure no error has been made when bearings are being installed. Yep like every company building anything, we have had problems with parts that are not what they are said to be, in our case bearings. And yes plastigauge has been used within Cosworth in the UK

Richard, You should clarify that when setting the thrust bearing, you do it with the main cap NOT torqued. After a few whacks with a hammer and a drift, then torque the cap and check the clearance.

not much difference overall ? maybe sound?

Of course it does

Seen this a lot in my 40+ years 😂

Hard to pick 1. Some of my favorites are the SD 421, 428ho, ram air 2 and 4, 455ho, but I have to give the slight edge for my favorite to the sd455. Just a bad a$$ motor even tho detuned for emissions. Wouldn't take much to have an absolutely dominant beast of an engine. Just so much potential.

So, put some modern cylinder heads on the DZ 302 ,like A.F.R. 195s. Then the Chevy wins again.

Plastigauge works, but assembly grease splattered everywhere is disgusting and unnecessary.

Wouldn't that twin s475 setup likely be very laggy in the real world on the street?

I wonder if you can do the splayed aftermarket 4 or 6 bolt caps on rhis block. That would be great.

How can you put m90 on Lt1350

i bought some looneymum sbc heads and spent the best yrs of my life porting them until i listened to darin morgan and realized i have no idea how to port heads

17 sec baaaaaaa! 😂

What is the good ring gap for a 454 bbc 7.4 with single turbo 76mm

Port injection

Try the new gen 2 ts

My question is this: there should be a good bit of PTV with an LY6 , correct, right? Since it comes in at 9:6.1 compression?

real question is how does it fair with boost

Super, j’ai une Maserati granturismo sport 4.7l 2012 et j’étudie la possibilité de mettre un injection multi-papillon avec longueur variable et double injecteur. 390cc ( origine)et 250cc. Les 250cc seront connectés a la commande sport et fonctionneront uniquement dans le mode sport et une re programmation du boîtier et nouveau collecteur d’échappement.

My 5.7 ls combo with 243s made 548whp 444wtq on pump gas in a street car.....stock heads can work. It's a shame so many go to a aftermarket head.

I eat plastigauge for breakfast.

Both ways work. One is just more professional than the other. Just the bore gauge will give a more precise measurement.

I’ve built hundreds of motors and always used plastigauge , never had a issue with any of them,

Richard i hope you answer this, and im sure its been asked before, but does that XR 274 cam need piston notching on a stock 5.0? You seem to use it all the time ao I figured it would be a great question to have answered. If not are there any heada that might need notching? Thanks and merry Christmas!

man! I missed the livestream. Frigging youtoob doesn't fire off notifications for your channel. How am I supposed to win that m90?

I lost $6000 on a motor to a machine shop in Gilbert Az. Always advise them before they accept your work you are fully prepared to sue them.

Never ,never trust a machine shop. 90% of them are idiots.

Out of the unported OEM stuff I'd say BBC rec ports are going to be the big dogs. You get big cubes out of the box too which is nice. A lot of big block heads don't have good flow even for the displacement. In terms of a stock SB (non-LS) heads and max effort? You'd be a third to half way to a decent set of aftermarket aluminum by the time you got the machine work done these days. All of those heads are old, aftermarket or old aftermarket. The only reason to use a set of heads like that is class compliance or availability IMO. In a lot of cases max effort production irons will basically meet up with a decent stock aftermarket head. As an example, the Jeep 4.0 head heavily ported will basically match a stock Edelbrock aluminum head flow wise, probably be in roughly the same money (perhaps even more) and still be 35lbs heavier not to mention probably have a more durable deck. Something else about those heads are the floor is really dead, and your odds are good that you'd actually want to ADD material in some places to make the head flow better. My 4.0L head has about 4-5 hours into the head with minimal porting. I've got minimal money into doing it, if I get a bit extra CFM so be it. I most certainly wouldn't put 20+ man hours into it.

One more thing to add If your trying to test the rods for out of round- 4 strips each 90 degrees the thrust side wears first Any high kms engine will make better oil pressure with fresh ( stock) replacement bearings Mains seem fine

Any check, dlb check Triple check is great Plastigauge Will tell you if a journal is out of square and out of round on a used motor and lets you check any parts machined Many times I took a very well used motor and swapped in fresh bearings just cleaned up crank( bearings wear first) LS motors way tighter- check then you know- to tight sheers oil or can spin a rod bearing Great Content again Richard!

Plastigauge is adequate to give you an idea of clearances, but when you are liable for that motor, I'd rather measure and know.

I have a 1986 mustang gt, I purchased it new for racing, I ported some E7 heads, added 1.94 and 1.6 chevy valves, Kaufman stage 3 camshaft, flycut stock pistons, victor jr intake and 750 double pumper carb. It went from 87 mph stock to 103 mph in the quarter mile at 3000 ft elevation. Modified Grand nationals couldn't beat me.

Its been around for ever. It's close enough. Usually.

1. Stability of the block 2. Head design. Gen 3/4 wins everytime

Do you have the tune file for the l33 with low buck cam. I’m putting together the same engine.

mehh,. seems like extra work tbh. + plastigauge does have a shelf life... but id want to use them on my next build because im rusty ., and dont trust my tools or myself anymore

I’ve rebuilt way more motors using the plasti-gauge that with measuring tools it’s so much faster when you are in a shop trying to get stuff out the door… I’ve also never had any of those motors come back. I have had multiple autozone reman engines blow up after they “rebuilt” it lol so it definitely works

I know I was shall we say Schooled or disciplined by one back in the hills of Virginia early 70's I had a 67 Chevelle I had Lt 1 Muncie and 12 bolt 3.73 and the Ford ate me on the top .... I had a 64 Comet with a 289 HI-PO.,...It had all the goodies from Ford.... Detroit locking rear end and top loader... Rev kit etc.... even the factory tachometer....That thing was crazy... Ran like a Chevrolet...lols

Upon mock up I use plasie gauge . Before machine I always double check it with my equipment(so i know exactlywhat they did after). 99% of the time the plastie gauge works great. On my high RPM stuff, I like to know what the change between vertical radius and horizontal radius of the bearings are. My own stuff is don't care if the rings are +-2thou. Customer stuff is like to make them all the same.

You totally blew my mind with saying you re-use 3rd Gen HEMI rod bolts. You are the very first I've heard this from. Others are so solid on the claim that they are torque to yield one time use and then trash, that I am actually scared to re-use. I wish we could discuss thus further.

THANK YOU