On this episode, we fire off the 406 Small Block Chevy on the engine test stand and it does not go as planned. After we break this engine in, we are going to install it in a 65 Nova 2 door hard top.
Man that lil 406 really sounds snappy and everytime i watch your videos it makes me want to get my 406 together but first i have to do a few thing with my big block in my g body monte carlo ss its just so hot here in louisiana and im 63 years old and the heat whips my but . I cant wait to see this nova make a hit.
@@richardsmith-qy6vl I love G body’s!!! I also love 406’s!!! The green Chevelle in the background is a 406 as well!! I definitely understand the heat!!! I live in the far east valley of Phoenix! It really takes it out of me! Thanks for watching and commenting!!
You should add a couple O2 sensors to your run stand. Would help with sorting out the base tune. The good ole brake clean spray down to check for vacuum leaks is always my go to. Sounds good at RPM though. Crazy issue with the distributor.
That must be Loud in your garage, I bet your neighbors like that! A few suggestions is get some header mufflers and that will help you hear what is going on. You might have a vacuum leak with that old manifold, you could try a thicker intake gasket like the 1266. Just suggestions, you will get it figure out.
I think you might be right about the gaskets. The normal 1205 1206 and 1207 are good gaskets but are kinda thin. My neighbors are all super cool! They love it!! The guy across the street and to the left has a 500 cubic inch big block 68 Chevelle I built the engine for. So they are use to it!! Thanks for watching and commenting!!!
Troubleshooting is my favorite. Making one adjustment at a time until it runs well is great fun. I had a faulty module in a brand new Summit Racing distributor but only found the problem many years later because it can't be a new part problem right?
What aŕ the cam specs at 50 duration lift and lsa ànd the rpm range if yoù dont mind me asking also i think my rods are s6tock 400 rods and they are down in the hole abot 0.40 thousands so if i use 5.7 rod out of a 350 how much wìll it bring my piston up in the hole any help would be appreciated im trying to build this 406 on a budget. And not looking to buy 6 inch rods and piston so does 0.45 thousands sound right i used a straight edge ànd feeler gauge to measure how far down it was ìñ the hole id like to havè at least 10.5 to 11.1 compression with either a 64 cc or 70cc promaxx 315 heads ĺike i said any help would be appreciated thanks in advance your friend from Louisiana rick 427
What’s up Rick!! The cam in this engine is 242 @ 50 .555 lift on a 108 LSA. A stock length 350 rod is 5.7 inches. And a stock 400 rod is 5.565 Hope that helps!! Thanks for watching!!!
Going to 5.7" rods from sbc 400 rods that are 5.565" would raise the pistons you have .135" so .135 - .040 = .095" out of the hole. Either stick with the sbc 400 rods and have the block decked .040" or get new pistons for the 5.7" rods.🤷 Or you can get very expensive thick head gaskets that would cost as much if not more than having the block decked.(Have the deck milled, the deck is what the heads are bolted to for people reading that aren't sure if the terminology) Beware of machine shops that ask you to mock up the block to see where the deck height is in the 4 corners. Those shops aren't going parallel off of the mains.😎👍
Having that engine run stand is an awesomething you're doing some great troubleshooting? And I would think maybe checking for that. Vacuum leak while on the stand would be a good idea I will look forward to seeing more
@@tackettshoh Yep me too. Had the old points distributor laying around that I knew I wouldn't be using so.... Plus using a distributor will closely mimic actual running conditions because it has the oil crossover slot in it. I usually prime the pump with the valve covers off and prime until I can see oil being pumped through every push rod to know the oil is flowing where it's supposed to.😎👍
@@itseithergonnaworkoritaint7852 I usually do the same. Valve covers off. I’m just happy the oil pressure was high and it was consistent. This is the bottom end from the fluctuating oil pressure videos. I got some bugs to work out. But I’m happy so far.
