Pontiac 455 w/ Pontiac Super Duty 421 McKellar #10 cam - first start, fresh rebuild

455 Pontiac w/428 block, SD421 SOLID FLAT TAPPET CAM w/vintage Crower restricted lifters, std. 455 forged pistons, factory GM Pontiac NOS double moly rings, SD455 rods, factory cast 455 crankshaft, stock balancer w/vintage H-O Racing Specialties timing tape, Melling SD455 oil pump, '68 long windage tray, '73 baffled oil pan, Butler crank scraper, BOP seal, 1971 casting #98 455 D-port heads, opened to RA IV intake port gasket, ported, 2.19" Ford Cleveland valves w/RA IV pushrods, 1.73" exhaust, BBC long rocker studs, Melling stock 1.65 RA IV stamped steel rocker arms, vintage M/T valve covers w/Ansen spacers, Edelbrock Victor intake manifold, Holley list 3418-1 Chevy L88 carb 850cfm, vac. sec., Dominator bowls, needle valves, accelerator pump, squirter- 4 tube headers, GM stock HEI ignition w/Accel 8.8 wires, McLeod 12" clutch, Ram steel flywheel, Lakewood blowproof bellhousing/scattershield, Muncie 4 speed, 12-bolt Chevy rear w/4.88 posi- in 1970 GTO.

[@tomm9860]

Sound pretty dam good to me. I had a 1968 400 H.O. Formula in my 66 GTO yes with a 4-speed tw10. Got married got read of it. Biggest mistake i ever made in my life. Old Combat Vietnam Vet 1970-71 Camp J J Carrol DMZ MOS#13A10

[@tunnelportterror]

Look through my later videos when I got it tuned etc.

[@excelerater]

dream car with a 25 cent fuel filter waiting to explode

[@tunnelportterror]

Hey that cost at least $2 😂 lol Initial startup, no water, radiator in it there yet.

[@tunnelportterror]

Here it is now kzbin.info/www/bejne/noDUlYOmbsZnZ9Efeature=shared Where's your 1970 GTO ?

[@robertbeard1230]

Do you have more video...I have a 65 pontiac 2+2 tribute with a totally reworked 421 tri-power, cammed, with 454 HO heads with l ok ng tube headers...and a 4 speed manual transmission attached. I'm finding your post interesting. Tha k you for sharing. I'm planning on sharing mine when it gets closer...hopefully soon.

[@oldschooltwist18]

Yours sounds interesting also Robert. I have a tunnel rammed stroker on e85 in 68 lemans vert. Just came across this video. Sounds pretty 👍

[@tunnelportterror]

yes go to my channel, watch videos, I tried 6 different carbs on this engine.

[@oldschooltwist18]

@@tunnelportterror I was gonna use some #16 heads and have a set of 1970 #13s but went with wenzler series 2 and his tunnel ram w comp roller cam and two mark sullens e85 carbs and 1 7/8 headers. People talk smack about the wenzler heads but I've had very good performance with them and they are very affordable. Getting the right carb helps a lot...sometimes they can act like ignition problems and just drive you nuts...keep up the good work

[@hoost3056]

Man, you're still around? After the Firebird you kinda disappeared.

[@tunnelportterror]

No I just got some different cars. But I had the GTO since 1982 put away. Never finished it. This 70 GTO I had body off frame bsck in 1980's

[@patrickshaw8595]

How you overhaul an engine = must begin with used cam.lifters and cylinder heads in order to get the piston rings well broken in under various conditions. Next the new camshaft installed with it's break in at 2000 rpm. Finally the new cylinder heads with the HEAVY HOTROD VALVE SPRINGS are installed and the engine is ready for use then.

[@kevinmanning4880]

Wow! I have heard that for the first time and makes so much sense. Thank you for putting that out there!

[@patrickshaw8595]

@@kevinmanning4880 56 years and counting of dicking with spark engines. My Dad had 30 year head start - and then we did it together until 2010. Making a four-2bbl manifold for a Pontiac 400 to be blow-through supa'charged right now. My buddy and I never played with big long duration/overlap cams before so this is the experiment. Going to use anti-reversion chambers in the headers and reed valves under the carbs - it works we'll make a video and I'll link it to you.

[@tunnelportterror]

I've been building engines 40 years. who told you that nonsense ? you put the new cam in with moly grease prelube on it, fire it up, and GO

[@robertluich5656]

It's not running too smooth. Shouldn't be shaken that much your engine. You check your time in a little bit.

[@tunnelportterror]

dude, it's a vintage 1962 Super Duty 421 cam, with solid flat tappets. that's how they idled. and that was a fresh engine just built. first start in the winter, cold garage, with a big Holley 850 DP from an L88 427 big block Chevy.

[@StrikersLG]

​@@tunnelportterroreh ignore him. Some people cry about engine rattle/shake but then go asking the most basic forums for cams that "have a good chop"

[@johnbecay6887]

what are the specs on this cam?

[@tunnelportterror]

factory SD421 was 230 intake, 240 exhaust, with LOTS of overlap, .500" lift this is a Crane copy which is slightly bigger.a few degrees

[@ericwilson2585]

Seemed like quite a few of the GM cars of the late 60's and 70's had bad camshafts concaved lifters bent pushrods and broken rocker arms. Oh yeah, and dead cylinders. Probly just me though.

[@tunnelportterror]

And today they have bent valves, timing chains jumping time, spark plugs snapping off, pulling threads out of aluminum hesds, turbos melting down, and filled with Chinese, Korean made shit parts. And cost 50 grand for the pos. And are worth $500 scrap value in less than 10 years. While the restoreable old cars are worth 50 grand.

[@ericwilson2585]

@@tunnelportterror You said it brother. Especially if you're into the old Mopars it seems. I think I'm gonna try and get myself an old beater C4 Corvette to work on, they still seem to be kind of affordable these days, for me anyways, one that's fixable.

[@Arninetyes]

Really? Flat tappets, fresh rebuild, and you let it idle? You're lucky it did no damage. I did that on my first engine. It flattened cam lobes, despite all the lube I applied, and despite priming the oil system prior to starting. Okay, to be fair, it wasn't a Poncho, it was a small block Ford.

[@ChicagoRob2]

I had a McKellar #10 in my ‘59 389 Catalina. I made sure the distributor was set so the engine would fire on first startup. It started immediately and I set it to 2000 RPMs for 20 minutes. Perfect break-in.

[@SandMountainBallistics]

Was it a comp cam? And were you using zinc? The assembly lube wipes of the first time it’s turned over and it doesn’t hurt to let it idle for a few seconds you just want to get the rpm up on it because it gets the drag off the cam

[@SandMountainBallistics]

@@ChicagoRob2 did you peen the press in studs?

[@ChicagoRob2]

@@SandMountainBallistics I had screw-in studs installed. Stock Pontiac pressed studs are very weak, because they are hollow for oil delivery. They do not play nice with big duration, high-lift cams, which can cause pulling and/or breaking.

[@SandMountainBallistics]

@@ChicagoRob2 I built a 389 here recently and I found a set of old isky screw in studs for the early style heads. I had isky custom grind me a cam it’s got .465 lift and 224 224 duration. I’m also running it with Rhoads vmax lifters I put a windage tray in it ported the heads about 80 percent and I had the machine shop for the biggest intake valve they could which was a 1.92 and I had a three angle valve job I back faced the valves. I put long branch manifolds on it and soon I’m gonna be putting a Mickey Thompson cross ram on it. I’ve drove it a little bit with a 600 cfm edelbrock and it’s pretty fast by barly hitting the gas I go it up to 70 but I really think a bigger carburetor will makes it a crap ton faster and some exaust I’m really hoping for a 400 horsepower engine

[@Schlipperschlopper]

Sadly from 2030 on all combustion cars including classics will be banned from public streets in entire EU and Scandinavia :-( In Germany the Green Peoples Party gave order to shorten fuel supply from 2025 on by reducing all conventional fuel stations to only one state operated central gas station per city or county. Now they want to slow down all the gas station fuel pumps from 20 litre per minute to 2 litre per minute...From 2027 on in the EU certain car spare parts will be banned too....as exhaust systems, turbo chargers and even some engine and gearbox oils...California and New York will do the same from 2027 on.... So no investments should be done in oil burning cars any longer....They even created a new kind of crime here, called emissions and smoke crime :-(!!!!

[@patrickshaw8595]

All the tyrants issuing these orders will all be tried in People's Courts and executed by carbon monoxide poison from classic cars LONG before 2030 arrives. Have nice day, Rabbi.

[@kevinmanning4880]

Much appreciate your comment!

[@andrewpipitone1572]

Where did you learn this? WEF ?

[@Schlipperschlopper]

@@andrewpipitone1572 Berlin and Bruxelles leaks

[@joshmeek5346]

But the super rich can keep there FU