350 CHEVY HEADS BEST AND WORST PART 2

okay so I'm back I wanted to do a part two I've gotten so many questions on the small-block Chevrolet heads and you remember in the other video we talked about these earlier style heads we got a set of one nine threes here that we just did for customer and so these were the typical 76 CC chamber they flowed pretty decent they have the corner bolt valve covers and so forth on that's on that's an earlier style head but now I want to bring it up to date a little bit okay a couple things that we need to talk about number one I'm getting a lot of people asking hey which 350 heads should I put on my 305 okay let me say this loud and clear do not ever put 350 heads on a 305 dumb okay and here's why number one 350 head that has 194 valves which is the bigger intake valve you can't put that on a 305 without the valves smashing into the engine block and bending because the 305 has a smaller cylinder bore and the big valves they don't fit you can put 350 heads on with the small vowels own the truck heads but here again you're defeating the purpose because you have such a small volume and the cylinder smaller cubic inches if you will what happens when you put a big 76 cc chamber on a 305 these your compression goes down to around 7 to 1 305 s don't run very good with higher compression they're really going to run poorly with low compression my advice to you don't mess with a 305 I mean that's you know I had a guy post he says hey I got a 305 in my Camaro when it runs twelves and all this stuff that's fine but here's my point if all things are equal the 305 is not going to be able to keep up with the 350 right so a 350 is actually less expense to build in a 305 and it makes a lot more power so personally I don't mess with real thighs I think there are a complete waste of time that motor was a dog and you put money into three to five you're wasting your time okay so the other thing is see I got a list here okay one guy writes in and he says hey man this is all opinion without the flow numbers it's all opinion well I responded to that and hopefully everybody out there understands I know what the flow numbers on these heads are because I float tested all of them the stock Chevrolet heads all flow pretty much the same with a few exceptions there are some factory performance heads I understand all that okay so but for the most part they really don't flow that great some flow better than others but they're all you know designed for stock applications for the most part ok so now let's move up to my next point and that is is that I guy what I see all the time as I see people say they're talking about Vortech heads Vortech man I've got to have vortex ok well I agree for tech heads are very good heads but one of the big misconceptions out there is that a lot of people think to have Vortech heads and they don't the Vortech head design was introduced in 1986 in the 4.3 liter v6 engine it was not introduced to the small-block Chevrolet 350 s and 305 s until 1996 all of the heads that were around up until that point were either on what we call a TBI engine or TBI now TB i stands for throttle body injection throttle body injection you've got basically a throttle body on top of your intake manifold and there's a couple of injectors in it or one injector I'm not even sure I think it's two injectors in there and basically it's a glorified carburetor these heads were not good performers they were actually they actually had worse flow numbers than their earlier heads okay so there's a couple of differences between TBI TBI and vortex now vortex we'll get to that little later those are the heads you really want to find because they do flow well so the typical casting them is you're going to find out there and TPI stands for tuned port injection that's basically the the multi-port fuel injection setup that's just a little bit better than TBI but it's still used crappy heads so you know it's okay but if you love 4,800 to 5,000 rpms you're not going to flow any air just as simple as that okay so one four one zero two one ninety one one four one zero two one 93101 108 one zero one four zero one one zero eight one and one for 0 to 180 so basically 181 to 180 Three's eight 10s Oh eighty ones and 188 now there are some differences in these some of them had different size chambers this is a 350 head had a 76 CC chamber the 305's had smaller chambers a couple of them were used like this one here was used on the 305 out of 350 s so this pumps your compression up a little on your 350 you can pause the video and look at those numbers if you want and or you can do research on your own time the point is I don't want to spend a lot of time on the TBI heads under them to basically show you what the difference is so on the TBI head throttle body injection or the TBI had one of the ways to identify these heads and this is not a TBI head okay but it has the exact same bolt pattern this is an aftermarket head made by RHS but the bolt pattern is exactly the same as the TBI and the TPI the intake manifold bolts are the main difference on these so if we look at the intake manifold pattern on the TBI throttle body injection or the TBI two important Jackson heads which were made from 1986 through 95 what we find out is we have a bulk pattern that's very similar to the early small blocks now there is one exception what they've done on these heads is they have taken these tender two Center bolts here and they change the angle of them they they're there the angle is they're angled up that way okay so you'll put a bolt in here and these bolts will go straight in when you get to these bolts the bolts going to be angled up this way because of this it's difficult to put an early type intake manifold on the TBI or the TBI hats if you want to run a carburetor but they do make professional products and Edelbrock they do make manifolds now that actually have the bolt holes and the intake changed they change the angle on the intake manifold you can buy a carbureted intake for the TBI and the TBI has okay so basically the bolt pattern is the same with the exception of the angle on these two Center bolts the other difference is now if you look on this head you'll see that we have corner bolt valve covers but this is an aftermarket head so it has provisions for both so the other thing about the TBI head - the TBI has they're not going to have these corner ball valve covers they have bolt holes and this head has dual pattern so they actually have the bolt pattern in here where the valve covers have bolts going down the center of the valve covers okay a lot of people automatically think oh it's a center bolt head it's a Vortech no it's not it's not a Vortech if it has this bolt pattern we got one two three four five six exhaust or I'm sorry intake manifold bolt holes on each side okay we got one two three four five six so hopefully that makes sense because there's a big difference between that in the vortex so six bolts on the intake the center two are angled differently than the the heads but we still have six bolts on each side now if we look at this is our early head one two three four five six okay now the Vortech heads this is and this is what you really need to understand about the vortex is they were made from nineteen ninety six on up to into the two thousand two thousand six two thousand somewhere 2007 somewhere in there until LS motors came so the Vortech heads are ninety six and up and they are not TBI or TBI heads they are very different so if we look at the vortex heads these are the only two castings you're going to see for three fifty more tech heads they did make a 305 Vortech but they made a very very limited number of those in fact when somebody has a 305 Vortech that actually has a bad head it's almost impossible to find a replacement head for that nobody's got so they just yank it out and put a 350 in there which is what they should have done in the first place alright so the for tech heads 1996 and up you're going to see these two casting numbers one oh two three nine nine zero six one two five five eight zero six two these are the two castings folks that you are looking for okay so we had somebody talk about flow numbers earlier they said you know you know you're this is all conjecture now I know what the flow numbers are it's not conjecture these are the flow numbers basically that we're dealing with so the TBI or the TBI heads the best flow you're going to get out of those heads on average on the intake side and that's what we're looking at now we're looking at when we talk about flow we're talking about CFM cubic feet per minute we're talking about what a cubic foot of air is one cubic foot of air okay so when we flow test heads we measure cubic feet of air per minute how many cubic feet of air with that engine flow in one minute the bore of the TBI has and the TPI heads basically the best you're going to get out of them is around 185 to 190 cubic feet of air per minute the Vortech heads you're going to see right around 235 to 240 cubic feet of air per minute at their at their optimum flow lift which is about five hundred thousandths of an inch about a half-inch left on count these are going to flow 185 to 190 right around 400 left maybe for 20 left so these actually flow much better at a higher lift we've got I don't know probably 50 CFM's more flow from the Vortech head than we do from any of the TBI heads one of the things that this does is it makes this Vortech head and we've got a Vortech head here makes these four tech heads and excellent performers or an excellent choice now again they're not going to flow as good as you know this aftermarket RHS head with you know really good chamber technology and gigantic intake runners ok this head this set of heads here was over $1000 they flow right around to 90 to 95 CFM's on the intake side which is you know that's a street rod motor that's that's a high performance or a race motor or whatever the factory Vortech heads one of the things you'll notice right off is the chamber is different if you look at the traditional 76 CC chamber and this is not a TBI head but this is very similar to the TBI chamber the TBI chamber will also have this spark plug boss here in it but it will have a chamber that looks very much like this now the Vortech head if you look at these what we've got is we've got what they call a heart shaped chamber this was a much more efficient much more advanced chamber design and technology was much better we also have a very big intake runner right for stock engine which makes these flow really well I showed you the flow numbers a minute now one of the biggest differences on these is the intake bolt pattern remember we counted the intake bolts on our other heads we'll just come over here and do it again just in case anybody misses this 1 2 3 4 5 6 intake bolts the Vortech number one it doesn't have a 3/8 intake bolt has a 5/16 bolt and we got one two three four the true Vortech heads are only going to have four intake bolts on each side there is nothing in the middle here there are no bolts so we got a heart shape shape shape chamber we got two bolts here two bolts here on the intake side the outside looks very similar to the TBI here and we have the heart shaped chamber with big bowels of course so that is your Vortech yep these are excellent performers now you say well you know what about the intake manifold what if I want to put a carburetor on that what if I want to stick these more tech heads what if I want to upgrade my you know 82 Camaro or my 72 Chevelle or whatever with more tech heads as actually very excellent way to gain some power for good price you can get a decent set of horn tech heads for probably five or six hundred bucks you really can't buy the RHS heads or the darts or any of those for that kind of money so these are a really good upgrade over the early heads or especially the TBI hands or the TBI heads and you can buy tada this is made by professional products and I want you to notice how many intake bolts we have here we got one two three four and they're going straight down into the head rather than going in at an angle if you look at the intent ones here when this head is sitting on the motor these bolts are going straight down there so this is a manifold that was designed to go with Vortech heads and you can get a single plane you get a dual plane like this and get whatever comp l brock and competition products and this one here is made by PowerPlus professional products you can get these manifolds from pretty much anybody so if you want to upgrade to a Vortech head just make sure you're getting true bortac cats go what you will see all the time I see this all the time you'll see an advertisement of Craigslist or Ebay and it says for tacit lure tag heads for sale and you look at the heads you start looking at the pictures of them and you look at the casting number and they got six bolts here and they have one of these casting numbers here okay those are not for tech heads so hopefully that helps you understand what we talked about we talked about what's that that if you have any questions make sure that you email me send me a message you can also look me up on Facebook my vintage iron 7512 and make sure you subscribe below and so hopefully that helps this is all based on you guys you guys say hey what about the center bolt heads what about the vortex so I'm hoping that will clear up some of the confusion and keep you from making a big mistake because a lot of people either they don't know they don't have Vortech heads or they figure you won't know and they're trying to sell you TBI or TBI heads call me vortex when in reality they're not so thanks for watching and we'll talk to you soon

Channel: Myvintageiron7512

Views: 292,696

Rating: 4.8873739 out of 5

Keywords: Camaro, YouTube, Civic, Mustang, 7.4, Drag Racing (Sport), Cars, Burnout, Race, Ram Trucks (Brand), Head, Auto, Racing, V8 Engine (Engine Type), Dodge, Drag, Best, Dodge Ram (Automobile Model), Hourse Power, Big Block, Chevrolet (Brand), Acura, Used, Chrysler, Buick, Pontiac, Honda, 5.7, 5.0, Ford, 383 stroker, Turbo, Toyota, Ram, Street Rod Rat Rod

Id: q7UNH0QkxEY

Length: 16min 43sec (1003 seconds)

Published: Fri Dec 27 2013