Problems Solved - GTO 400 Dyno Blast

and we've got a planet for under the dyno with tissues so let's figure it out okay here we go whoa [Music] welcome back to nick's garage this little shop just north of montreal is where nick builds new power into old-school muscle cars [Music] [Music] so [Music] today he has another iconic engine on his dyno for break-in and testing [Music] it's a pontiac 400 destined to go into a gto convertible [Music] but before the engine can tear up the streets it has to pass nick's tests [Music] [Applause] okay we got something special today on the dyno it's not a mopar it's a pontiac 400 cubic inch engine that belongs to joe for his 1969 gto convertible he bought this engine from somebody he knew and the only thing i've done is install a rammer four cam that he brought in and also he brought me a set of heads to install we replaced what was on the edge in the first place he bought it as a complete motor so i replaced the cylinder heads i put in the ram report cam you brought then we just put it together then i want to prime it and when i primed it all we have 35 pounds of pressure cold pressure with a 20 50 oil so i said you know what i better change the oil pump i bought another oil pump high pressure i've installed it and of course now we got to get it started i want to see what uh we're going to have us first of all we got to break in the cam what kind of horsepower it's going to make i do not know we're using pitcher kind of the 94 octane the engine right now this way or this one here is a 10.2 compression ratio but from the factory was a 10.75 but what kind of horsepower i have no idea so let's start by breaking in the cam and hopefully we got good oil pressure because when i primed it with the new pump i have 90 pounds of pressure so one way to find out is let's get it running break it in and then see what it does [Music] it's a nice car it's a cruiser and it is not looking for crazy power just right on a nice cruising machine so this 400 cubic inch hopefully hopefully from the factory ramire 4 with a 10.75 compressor ratio was rated 330 horsepower it's got a factory intake manifold cast iron and we got a small set of headers which are i believe one and three quarter inch and uh we'll take it from there you know this is an engine that wasn't built by myself my client bought it off somewhere that he knew it was a complete motor all i did was when he brought it here he told me to replace the cab and installed another set of heads with this new set of valve springs so i installed the heads on replaced the cam put it together we followed low oil pressure changed the oil pump we got 90 pounds of pressure this time versus 35 when it first came in and you know what let's find out what it does and the reason we replaced the cylinder heads because the heads down the 400 that were on this block when he bought it related to what he wanted he wanted to pick up a casting i'm not sure what number these castings are he wanted to go with the 1969 era so that is the reason why he brought these heads and for me to replace them and here they are what number they are i'm not so sure is it a 4 8 well whatever maybe you guys can tell me and we've got a rochester four barrel cast iron intake with a 1.5 rockers nothing very special just a simple 400 pontiac motor and if everything goes well we are gonna have it painted after uh we're gonna put on a stand and before it gets installed in the car it will be painted this color right here so i'm ready to get it started see what it does so let's start by breaking in the cap [Music] it's not very common to get a pontiac engine i used to work for pontiac back in 1976 for five years i've done quite a few of them over there and now i've got uh another partner here in my hands it's in the dyno we're going to test it for joe and let's hope i just hope i hope we make over 300 horsepower because we have less compression it is around therefore cam and the specs are not on the camera i bought the cam and what should i say my client brought it in i don't know where he bought it from and he brought the lifters the cam so we put it together we put a also a new valve a new set of valve springs and that's all that was it it's a standard board it had new rings installed apparently somebody built it and looked at the pan underneath somebody put new bearings on it standard bore and the pump was used so what i did is i bought a new pump high pressure and installed it you know to break any cam we got to start it right away and keep it to 2 000 rpm for almost 20 minutes okay it's 9 15 let me get all this information in the computer you know i prime the engine you know usually i prime every engine before i put on to the dynamometer and you know this engine was built by somebody else's so i had to assemble the silver heads put on the rockers of course and and prime it and when i planned it on my gauge i had a maximum 35 psi and we also had a 2050 oil so i replaced the pump i bought a high pressure and i hope it does the job now is there a bleed off anywhere i don't know i had some i've also had an experience with a panic engine that when it was cold around 60 pounds of pressure then when it warmed up and went down to 20 pounds so in this case now i got a high pressure problem let's see what it does again it is another pontiac engine which got main it has large crankshaft main journals they're so big so they need oil so with this pop i think we should do the job here we go [Music] you know it's got cat's pistons uh somebody uh whoever did the engine before he uh cleaned the block put new rings did he balance it i'm not sure we're going to see if it's got any vibration my job is just to replace the cylinder heads cam shaft and get it on the dyno and here we are it's at 399.9 cubic inch which equals 400 cubic inch we're going to take it at 2800 to 4500 rpm at 300 rpm per second all right first of all let's get it started to break in the cam is everything there water's on okay i think i'm ready all right here we go and by the way this carburetor does not belong to my client it belongs to one of my friends i borrowed it and it's due for a mild performance but in this case it might be running rich i won't be surprised because we don't have any meeting rods in the back if i remember correctly here we go yeah full throttle is going to run rich i do have another carburetor which belongs to my client but after i break it in i will replace any see how it goes but first we'll do some testing with this okay i'm not hooking up the viking advance which i'm going to hook it up later on but right now i just want to break it in okay here we go this goes here it started okay that is the reason why i primed the engine you see when you break in that cam you know you want to prime the engine get all the lifters full of oil okay here we go [Music] it turns clockwise i marked the top dead center i marked it up the center okay come on nick let's get it going as the cam break-in period begins nick dials in the dynamometer resistance and keeps an eye on the oil pressure it was too low when the engine came to the shop now it seems like it's too high 100 psi oil pressure oh wow i don't want to see so so so so look oil pressure is at roughly 40 pounds there you go here we see that we are here we had a 100 pounds of pressure cold engine 20 w50 motor oil that's the grade i just used and now we got 40 pounds of oil pressure hot idle so i'm gonna leave it there because you know most of the time the engine is hot so what i'm gonna do is i'm gonna just get it started i'm gonna check the timing make sure we got the timer i want and then let's go do some testing we got oil leaks i got no engine uh valve lift or walker noises whatsoever so i'm gonna set the timing and let's do some testing are you guys ready let's go 40 pounds of oil pressure hot idle is great we're going to make some testing right now i just want to set the time i want to see where it is i have it roughly 36 degrees but i've full throttle i want to see what i got [Music] so so so [Music] okay i set the timing at 36 37 degrees without the vacuum that i put the viking back on and i'm ready to make a test and don't forget we got a 10.2 compression ratio we are running a 94 octane fuel and uh i think i'm ready to get it running so oil pressure falls about 40 to 45 pounds of pressure on idle hot so i'm going to leave it there i don't want to experience the other thing we had with another product i only had 20 pounds of pressure but then again a lot of people run that kind of low oil pressure when the ponex engines got hot but i think i'm going to leave it as it is i think it's good but let's get it tested let's warm it up good and see what happens here we go [Music] wow we're going to take it from 2800 rpm to 45. wow i've got death lady so let me wear my earphones here we go wow okay we got a problem here well i didn't want to go full acceleration okay let's shut the fancy what's going on maybe your job is locking it too early i'm not so sure okay i'm just gonna i can't get full throttle all right i'm gonna have to do some testing what's going on this is not working i don't think it's a carburetor but you know what we gotta figure it out okay leave that there that's good let's get it running see what it [Music] does happened there [Music] should start i gotta check my absorber here we go [Music] with my french carburetor it runs way too rich so i cannot run this carburetor not on this basic stock engine you can see it's got no meeting rods on the secondary so when the secondary's open up everyone's super rich and it stalls my engine so what i got to work on now is another carburetor to get it going and that's what we've got so let's see what we got to get going let's go wow [Music] you see there's no meeting meeting rods here so what am i going to do now do i use my client's carburetor it says [Music] this carb is no afr ratio 20.0 [Music] wow tell you what i'm going to put some meteorologist on this one from this carburetor and hopefully it works here we go now these meter rods gonna work i'm not sure but you know what better than nothing [Music] well you know what the meteorologists control the air fuel ratio when the secondaries open up on the rear jets but in this case this carburetor was designed designed for racing full throttle but this is not a race engine so what it is a set of replacement complete carburetor because this one seems to be running very very lean from what i see on the tag so what it is i'll take the mini rods from this carburetor put them on that and let's go full throttle see what happens here we go because i noticed when i went full throttle it was way way way too rich you see the air fuel ratio was way down so let's try it again hopefully it works put on my o2 sensor open and follow up the plugs i don't know why the timing is at 36 37 degrees okay let's go i got to make sure the uh the load on the servo is about 95 to 100 90 to 100 percent here we go [Music] [Music] let's try it one more time here we go oh oh we should really crack it up eh no here we did a rough test just hoping we got it was running very very rich wow we didn't hit 5000 rpm yet we got a misfire i believe running super rich no i can't work with this carburetor i gotta find something you know what [Music] i'm not set up for rochester's so now i got to do something for rochester set up i'm not going to temper discard it it doesn't belong to me it doesn't work to my customer it was a friend of mine so i'm not going to work with this i'm going to have to why do we have misfire why maybe i just make one more test maybe i was cleaning up the plugs as i was loading it you know what let's give it another shot and what happened here where does this come from ah doesn't matter where it came from doesn't look like you came from this engine all right i'm gonna check the timing one more time [Music] [Music] all right let's check the timing one more time [Music] [Music] [Music] [Music] [Music] no something the timing is good i just backed up a little bit but i think it's air fuel ratio that's causing our problems here we go okay it's even writing worse oh well [Music] fuel ratio wow 11.3 11.2 okay i'm gonna shut it down we're gonna shut it down we're running way too rich with this carburetor i gotta find another carburetor this is not working for me it's running 11.2 11.1 air fuel ratio i backed up the timing we really lost a lot of power and from what i think well backed up the time it wasn't much anyways there we go what's happening here we got a misfire we did better before actually all right i'm just gonna make one more test and i'm gonna shut it down i'm gonna look for another carburetor i believe i believe that things running way too rich the timing is at 36 degrees full throttle and you know what maybe i'll try without vacuum on the distributor let me try that [Music] that goes there why i'm going to advance the timing a little bit george this is gonna be a problem now i gotta i don't like his wires i don't like the carburetor and i have to do a search on the silver heads it's a casting number 48. i believe he's got the wrong plugs i'm sure he does anyways i just put it together the way he brought it anyways i'm just going to do some research before i go any further all right i just disconnected vacuum i know it's got ported vacuum but you know what it doesn't matter it's full throttle i got my timing at 36 37 degrees but i advanced another thing back to 37 so let's make one more test and we'll see because from what i see swimming running way too rich and i believe these cylinder heads are i don't know what here they are i'm going to do some research i really don't think they're the right plugs and i'm going to get another set of wiring and that we are running on a set of points i also had the points replaced i uh let me just check that well give me a second you know a lot of people don't know this old school this is really old school you guys okay here we go i just want to check the do all on the points it should be between 28 30 i'm sure according to my feeder gauge that's where it should be okay here we go let me just warm it up [Music] that's well on the point it's all good okay let's make the test no it didn't go well at all oh okay we gotta look at what's going on first of all it's running way too rich all right i know that uh we got some issues here it's got a lot of misfire it's running very rich i don't have a carburetor i'm gonna try to see if i can fit this carburetor see if i can get it running i don't know if we have any problems with it well one one thing we know is the oil pressure is good on hot idle we got no oil leaks the cam is broken in so now i just got to figure out a carburetor make it work with the cast iron intake because this is a spread bore intake manifold i'm not going to work with another carpet i'll try to fix his if i can and i know i've got the wrong spark plugs and the cylinder heads he had replaced or casting 48 which i don't know what here they are so i'm going to do some search and get the right spark plug for this application yes and after all this is the purpose for the dyno not only do we look for horsepower we look for the problems and you know what we're gonna have to go further deep into it and fix it so before i deliver this engine it's gonna run perfect we gotta max out the horsepower and make sure everything air fuel ratio is good timing correct spark plugs and we take it from there thank you for joining me in the dining room thank you for subscribing to my channel and also stay tuned for future updates on this engine and have a nice day thank you [Music] so this problematic pontiac gave nick a run for his money but nick tracked down the correct spark plugs for the engine swapped out the carb for one of his dino room holley carburetors and ditched the old somewhat loose points distributor for a more modern hei unit the results 352 horsepower and nearly 402 foot-pounds of torque all that's left after a fresh coat of paint is to drop this beauty into joe's gto and cruise it on down the road [Music] and you guys if you look down below the video we have a whole bunch of merchandise that you guys can buy so whatever you like buy it love it wear it and enjoy it and help spread the word of nick's garage and if you have some time check out our patreon page we have extra content and you guys can watch it and take it from there and we'll see you next time [Music] [Music] you

Channel: Nick's Garage

Views: 101,334

Keywords: Nick Panaritis, Nick's Garage, Indy Auto, Engine Builder, Dynamometer, 440, six pack, mopar, Chrysler, plymouth, dodge, classic car, muscle car, challenger, charger, Carburetor, Dyno room, MOPAR, 454, Chevrolet, Big Block, b body, Drag Racing, quarter mile, dominator, Chevy, Bow tie, Edelbrock, Classic, Antique, Mopar, Rare, Original owner, Total restoration, restoration, Paint shop, Belvedere, Torque, Monster, Beast, Burnout, rebuild, fail, Corvette, Vette, BBC, Chev, 489, 1974, Pontiac, GTO, 400, Points, HEI

Id: 1EM25UMItEk

Length: 37min 16sec (2236 seconds)

Published: Mon Aug 01 2022