hahaha, good post. Yes, another guy learning the hard way. If you don't meet the octane requirement 100% of the time you'll be sorry. And might STILL not know what happened. Call ME people before you start guessing your butt off like this guy did. The Edelbrocks and the right cam have MUCH more potential than this. Over 6000 sets done at my shop.
I'm running a 1972 455HO 30 over with old school TRW L2394 pistons , comp cams 294/570 , 7f6 heads , torker 1 with a holley 850 hp series carb. Been racing Pontiacs since the late 70s. Nice work , like seeing some Ponchos.👍👍🏁🏁
The Pontiac we raced in Stock Eliminator had a beat adaptation. We ran no dip stick, we used the PCV system and no valve cover breathers. We also had a pressure/vacuum gauge going into the valve cover that showed lots of vacuum in the engine at idle but zero through the traps at 6800. When we started losing the low tension rings we saw pressure through the traps and did a "Freshen Up" before something went south,
@@Michael-qy1jz I'm guessing that since he just swapped heads, they were D ports. I'm also guessing they were not ported, just "plain" complete out of the box. Kaufman has virtually the same thing but supposedly more efficient....I'm really hoping, since I just ordered a set for my 65 GTO
@@justanobserver530 Yes, I ordered a set of Kauffman heads too in the first week of November so they gave me a timeline of the end of January, beginning of February to receive them. He said they are 10 weeks out.
Good to see you not in the junkyard on this one. GTOs are one of my favorites. When I came back from VN I bought a near new 69. 4sp, no power brakes, no power steering, no horsepower draining anything.
94octane fine for up to 11:1 with conservative timing. Check your math. 72cc is 10.7 to 1. You raised the compression ratio 3 points. Time to leak it down. Is that distributor locked out? Cranks like it has lot of timing on start up. Check your timing or put a curve kit in it.
@Russell Gerdes Because E85 is ~115 octane and you can make much more power than any other pump gas you're going to get. More compression, more timing, more power, runs cooler. No downsides. $1.50/gallon race gas.
Rich! What you describe is called pre-ignition. Detonation is a secondary ignition even that occurs after the spark plugs fires. The result is 2 flame fronts that increases the rate of burn and spikes cylinder pressure before the optimal crank angle. Both are bad, pre ignition is generally worse and it's less controllable.
So was just going through some of the old vids. Had to LMAO at Rich's quote on the last one I was watching DG Hangout #22 It was him saying this "This is going to be a fast build compared to alot of the builds around here" referring to the C10 tow truck. And this was posted almost 2 years ago. ABSOLUTELY love your show guys. ❤️ From Vancouver Island gearhead 😎✌️🤙
I was terrified when you set the new head on the guide pins and walked away without putting a bolt in, then when you set the other head on you see it lift. I thought for sure we were about to watch a brand new head hit the floor.
I love the 65 Buick Riviera with what have to be the coolest operating cocoon hideaway headlights there have ever been, just the meanest thing apart from a 59 invicta coming at you down the street
I'll never forget a Ford Wagon 200 ci inline 6 my mother bought from a mechanic in training. You'd drive it 15 miles and it'd be down another quart of oil. I think that car was single handedly responsible for the hole in the ozone.
@@johnpossum556 HAHA...I got a Tractor REALLY Cheap...from same thing...It was actually "Overhauled" but would actually spray oil out of the exhaust... He had Installed the Rings Up-Side-Down! All I did, was picked up a Gasket Set, and took the pistons out, IN FRAME, and flipped the rings...and had a nice usable tractor... After about 5hrs work!
@@johnpossum556 Nah. Back in the mid eighties, I bought a 1976 "Porsche" ( IE: high priced VW call girl) 914 2.0L from a used "sports car" lot....it ran great for the 1 1/2 mile test drive they allowed, but halfway home, it started blowing oil straight out of the crankcase, and into orbit. Six months, and a bank vault full of cash later, I traded it in at the first place stupid enough to take it. That was my first...and last, "Porsche" experience
Had a high mileage Mopar 340 back in the day; I put a lot of hard miles on it. Still ran well, but lot's of blowby. Took it apart finally. Had five broken rings.
@@timc9893 Funny I had a 1976 912E...Best German Car I ever owned...Had the Injected 2.0L Air Cooled 4cyl...It looked and drove like a 911, Accelerated and got MPG like a Beetle, and was reliable as a Timex... I am pretty sure your 914 and my 912E had the same engine... Your used 914 must have been shit kicked...
After waiting months and months, I finally canceled the edelbrock head order I had in, speedmaster heads came in right away and flowed more cfm than the last edelbrock set we used.
The big problem with Pontiacs and blow by is when the pressure starts building the rear oil pan seal starts pushing out. Eventually the pan seal will push out all the way and make one hell of a mess under the car, as soon as the oil gets to the headers via the torque converter all hell brakes loose. Make damn sure the flexplate cover is on the transmission.
Christopher Hall that’s amazing! I’m like from German stock, Austria. And live in Lancaster Pa in Amish Country and grew up in a church where they spoke high German when preaching. I heard Your beer purity laws come from the 12th century? There was a problem with grifters making shitti beer, making the peoples sick? I love history.
A number of years ago we messed with my buddies 383 Chevy and we put on Dart II cast iron heads with that swirl (efficient) shape. We found that it run well and made good power with a bunch less timing than it did with stock heads in fact it seemed happy over a lot wider range of timing.
Same problem with my old Holden after she overheated. Didn't get too hot but stuffed the rings. My fault for trusting the old 1960's idiot light. Turned out the globe was gone so the idiot (me) had no idea until she started running rough. Has an Autometer temp gauge fitted now. Awesome when a 10 cent globe costs you a full rebuild.
Colin Furze AND a Mightycarmods shirt? Some good choices there. Not a bad engine either, I've come back to domestic recently and have been building a Turbo 4l AMC Inline 6 for my AMC Eagle SX/4 4WD coupe. I've done what a lot of people don't like and kept the SX/4's height, technically dropping it a tad with new suspension, and have gone with trying to lower my center of gravity and making a great offroad/rallycross grassroots car. The 4l I6's aren't bad for power either...if you basically just replace the head entirely :|.
Man I wish you were in my neck of the woods i need a good mechanic that really k owns his shit like you. Everyone hear dont believe in fixing only replacing with new! I love old stuff and you dont always have to ye new if you actually no your shit. We need more like you in the world
Rich; when Canada opens the borders between Canada & the U.S. you need to visit Westen Champlin; he dropped a 12 valve Cummins into a 2015 Ford Mustang
Glad to see an update on the goat but yea that blow by is pretty severe. Heck just keep it below 4k RPM and you will be golden. Oh and dont let mr Bias ply and zip tie borrow it or it will hit mustard and ketchup fer chur.
Why did the engine sound funny turning over at startup on the dyno? Is it just wound up THAT tight, or was it just not getting the cranking amps or something? Awesome videos every time! Love your channel, love your shirt! Have you ever checked out Dangar Marine? He’s an excellent presenter like yourself. Be well, Paul (in Kingston).
Love this chanel!!!! Is a project car ever really done? No. I totally understand this and people say to me now what are you doing? It's a project car!! Love your work mate and keep up these great videos
Man you guys are all over the place with the videos. I kind of wish you would show one project at a time. It’s kind of hard to get into it when the videos jump around from project to project. Nice video either way though 👍👏
As much as I get a stiffy from thinking about driving one of these, I know how much money I´d just dump into it to make it "the perfectionist way", so I´m just gonna stick with some shabby diesel truck.
My definition of detonation versus the charge burning it that the flame front in detonation MOVES faster than the speed of sound (~ 767 mph at STP). That is why you hear engine knock - the flame front moves with a sonic boom. The problem is that a flame front moving that fast is HOTTER than a burning flame front and thus things begin to melt.
Hope you installed a a good bit higher/longer duration cam on the engine rebuild to break up and overcome the higher compression ratio at start-up. Plus it makes for a real nice mid & high range boost in hp & torque. Looks good! 👍
ya keep a lil more of that air in the cylinders and it outta make a few more hp, sucking the excessive blowby back though the intake with the pcv system will lower the effective octane via oil contamination, a catch can/separator/check valve may be an option to dump it into the exhaust for short term reduction of stink/embarrassment/mess
in 1972 i got a 66 put high lift cam, 750 double pump holly, hooker headers everything else was stock and got 450 on the ground with 1972 pump gas ( 95/100 ) octane
If you come anywhere close to Knoxville, Tennessee, I'll have to get dad's 67 gto out and join you!!!! :-D or the 69 grand prix? or the 67 bonnie survivor? :) your pick!
With those 72 cc heads your compression ratio should be higher than 10:1 with those flat top pistons. What gasket are you running? I'm running the 87 cc Edelbrocks with flat top pistons and a .038" gasket and I'm around 10:2.
Ring gap(s) and piston load during cam BI kinda crucial. btw, what was timing set on during BI run and the metallic chatter, conv/flexplate bolt lengths? Pont always ran warm imo, also, what is the stochio on it with that induction setup?
Any chance you can post the cam specs? Never mind you did in the description. That is a perfect cruising engine. Toss in some 3.55 gears and that thing will fly down the hwy
Rich: Starts video saying project vehicles are never finished. Ends video saying several projects are nearly finished. Me: Agrees with both statements.
you should be looking at dynamic compression ration not static. Did your rings seat you should have done a leak down test. Did you check fuel air ratios/re jet. Change the timing?
Digging the Furze shirt. Is that one of those 'Easter Egg' things the kids are talking about these days? Can we expect a CAT powered drift tank in the future? Ha! Cheers!
Are those three primary headers the ones you’re using in the car or just dyno headers? At that power level I’d think you’d gain even more power from a set of headers with four proper sized primaries.
i got 12.1,cleveland,351,with 302 heads,std,goes like a cut cat,in a bronco,on lpg..economical.still going after 14 yrs..commodores,[ pontiacs to you ],hate it.
I guess the audi isn't ever gonna run and drive again since there hasn't been any videos on it in so long. Was such a cool project to just sit there while everything else gets worked on.
What's all that smoke?? Hate to say this fellas (from a Pontiac guy) You've got a broken ring or two, preignition the cause! The ring static pressure will be zero, but the engine will (inexplicably) still develop near its full hp. The crankcase develops pressure at full throttle... and the dipstick pops up. I've rebuilt five original (running) GTO engines with miles on them... all of them had the same problem, broken rings
Rich... when you do a 68 - 69 [for yourself]... go with that same engine but with Butler Performance just monsterfying it [I believe they'll sell you one of their's off of the shelf if you can't find one]. Small operation but INSANELY on point. Check them out. Anyway.. love the end product with this one... maybe start with a Le Mans parts car and even a rat bastage 68 or 69... Slip off before or after power tour to either Arizona, Texas or Cali... get you one of those... Canada Needs them... they are beautiful muscle cars and with Butler machining things up to your delight... go trick flow heads and some juicy supercharger... ported madness.. aluminum this and that... tickity-boo. 700---> Horse Pucks! Yessir... sorry guess it's a dream car of mine since my brother took off for his honeymoon in a 68 back in 73 lmao I was like 11 years old and... woah man... kind of like a 67 427 monsterfied Silver vet his brother in law had.... He had a couple of shelby King of the roads from 67-68... but... that couple of years for GTO's... Get you some of that Rich. Just for you! lmao Get one of them to sponsor you for body panels and floor panels... wheel tubbers... for MEATY Beefy madness :-))
Your content is so diverse. I guess as a result of trying to get your channel off the ground. Anyway, this isn’t my favorite build but this episode was great. There has never been anything as exciting as the Audi. It was just so oddball and genuine and slightly foreign to us Americans. I know you feel the same way. You were more excited than any of us. It was a real roller coaster. Bring it back out and race the thing.
I'd like to know where you got that lift table. ones ive seen only go about 3 feet high. And I'd reaaallly like to know where those wheel lift arm extensions for the 2 post lift came from.
Rich, what the heck was up with the AFR Target of your carb setup?! Throw a larger set of jets in that, you were tipping 14.2 AFR at WOT which is WAY too lean for that motor. You'd want to see something in the range of 12.7-13.0 AFR to really survive a bit better.
If you are running synthetic, it works so well that it delays rings for breaking in . Expect to drive 6000 to 7000 miles and all of a sudden you’ll feel the difference. You will think you got a great tank of gas or someone slipped a fuel booster in your tank when they do seat.
