73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Performance => Topic started by: rakedc10 on May 15, 2007, 11:10:10 am
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is it possible to put a foreign engine such as a high output sr20 or rb-series motor in a 73-87.....im just thinking about gas and i was like heck, lets put in a 400+ hp nissan engine in it..hahah
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??? Banned!!!
Sr20? lol seriously that's fine and all in a tin can lil nissan but you're talking about a heavy truck and by the time you were done trying to fab that lil 4 banger in there you would have exceeded the $ fuel economy savings if there even was any
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I've been thinking about possible combinations too.
And, i think i'm going to try the 4cylinder deactivation route----by taking the pushrods out of cyls 1,4,6, and 7.
I contemplated sleving down the cylinders or getting a remanufactured 262 (the one that was in the monza) but i think the cylinder deactivation plan is the cheapest way to go.
So, a 350 would be 175 CID and a 305 would be 153 CID.
We are looking at a 25%-35% increase in MPG. I let you know how it goes.
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Are you serious? lol - Cmon guys if you really want to getter better fuel economy buy a honda and drive that daily. When you want to use your truck use it as a truck.
You cannot simply remove the pushrods and expect your engine to last very long. The air in the cylinders needs to be pumped in and out for efficiency and prolonged life. The proper way to reduce fuel consumption with that type of idea would be to deactivate the fuel charge in those cylinders at cruising speeds. = Port fuel injection system
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With all due respect...and remember I said with all due respect...ah never mind (http://arhunter.net/forum/Smileys/classic/kiss.gif)(http://arhunter.net/forum/Smileys/classic/kiss.gif)(http://arhunter.net/forum/Smileys/classic/kiss.gif)
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I've been thinking about possible combinations too.
And, i think i'm going to try the 4cylinder deactivation route----by taking the pushrods out of cyls 1,4,6, and 7.
I contemplated sleving down the cylinders or getting a remanufactured 262 (the one that was in the monza) but i think the cylinder deactivation plan is the cheapest way to go.
So, a 350 would be 175 CID and a 305 would be 153 CID.
We are looking at a 25%-35% increase in MPG. I let you know how it goes.
That wouldn't be a good idea, as Vile descibed. If you were running a sequential EFI system and deactivated the spark and fuel it at x load it would be fine, but removing pushrods is not a good idea.
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i kno i kno...lol, my friend was like hey....and i was like hmmm, prolly wont work, but lets ask...v8's all the way! ahah
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is it possible to put a foreign engine such as a high output sr20 or rb-series motor in a 73-87.....I'm just thinking about gas and i was like heck, lets put in a 400+ hp nissan engine in it..hahah
??? ??? ??? ???
woo- i think if I'm gonna think about wanting 400 hp in my truck a nissan engine would be my last resort
I'm my opinion i buy these trucks because there American - built in America by Americans and i would never stick a jap 4 banger in one
Like the sticker on our air cleaners say - (http://img512.imageshack.us/img512/4348/87124bo2.jpg);D
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When I was in school for mechanics (DBCC Daytona) one of the classes did the deactivate thing on a 318 mopar. They removed the push rods and the plugs,And something with the carb,Can't quite remember. It was pretty loud though.
Steve
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I have a V8 350 I built that runs on the stand. Half of the engine is cut away. I built this engine myself to show my students what a running engine really looks like. This works well on a stand but would never be practical in a vehicle. I can post pics if anyone is interested.
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We had a friend that used a V8 Ford engine and used one bank of cylinders to fill an air tank.
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I have a V8 350 I built that runs on the stand. Half of the engine is cut away. I built this engine myself to show my students what a running engine really looks like. This works well on a stand but would never be practical in a vehicle. I can post pics if anyone is interested.
I'd love to see pics. :o
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Here's a few pix... I was gonna take a quick video but I ran out of gas :-\
(http://i6.photobucket.com/albums/y228/Sabaka454/cutaway014.jpg)
(http://i6.photobucket.com/albums/y228/Sabaka454/cutaway013.jpg)
(http://i6.photobucket.com/albums/y228/Sabaka454/cutaway012.jpg)
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GRRR You really can't see good because of the post pic size restriction >:(
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That's cool. ;D So it actually runs OK on 4 cylinders? Does it shake alot?
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It runs mint. I will put some gas in it tomorrow and take a video clip of it. The crankshaft splay is 90° apart even fire so with that whole bank producing no power it's fairly well balanced. I'm not done with it though, I plan on adding a radiator and clear hoses maybe a charging system...
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I would LOVE to see the video on this. That is SWEET!
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Here's a quick low quality video:
#1
http://s6.photobucket.com/albums/y228/Sabaka454/?action=view¤t=001.flv
#2
http://s6.photobucket.com/albums/y228/Sabaka454/?action=view¤t=003.flv
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That is sweet! What ever made you decide to build it.
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:D I teach automotive technology and what better way to get a student to understand what 1500 feet per second is than to show them? Besides it's cool ;D
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Definitely cool! I want one! ;D
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:D I teach automotive technology ................
I didn't realize that was your profession. it is definitely cool.
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Thanks! Yeah that's what I do! It was fun and easy to build but like I said it isn't done yet and when it is I'll take a few good quality pix and vids
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OK, could you explain exactly and in great detail how exactly did you do this.
Obviously i'm not interested in taking one of the heads off and leaving it off.
What i'm mainly concerned about is did you have to do anything to the carb?
What about intake manifold? Did you block off 4 of the runners?
What about ignition? Can i simply unplug 4 of the wires?
How did you handle the keeping the lifters in?
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Well It's a dual plane manifold (see other thread on that) and I blocked off the left bank using a block off plate I made out of sheet metal. I RTV'd it and bolted it on. The cutaway head I left the two valves exposed but welded the oiling holes shut on the ends of the rocker arms. The lifters once they move up in their bores aren't going any further - no pressure= no oil spray. You cannot simply not have wires hooked up. What I did was mad a plate and threaded spark plugs into it to allow a visual of the spark firing that is wasted. Electricity takes the path of least resistance and if you simply unhook a wire it intensifies the firing voltage of the coil. Essentially you get a lightning bolt looking for somewhere to go. Usually to the distributor base is where it ends up and often spikes the module putting it out of it's misery. It can also overheat the coil very quickly.
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OK, you're going to have to teach me like i'm 5 yrs old because i'm new.
1)It appears that you have a rochester 2GV; Should i use a 2 barrel for this? Can i use the quadrajet that i have now (note: i also have a 2GV).
1a) It also appears that you have the stock chevy manifold---for the 2gv? Should i block off the ports 1,3,5,7, (or 2,4,6,8 whichever it turns out to be) at the point where they meet up with the head or sooner?
2) How, exactly, did you secure the lifters in their bores?
3) Can i take the 4 metal blades out of the distributor cap that aren't being used?
By the way, here is an interesting link about converting a SBC to run on 4 cyls. One of the very few i could find:
http://purplesagetradingpost.com/sumner/bvilleother/page%205.html
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Do you want to build one of these or are you trying to make your 8 cylinder a 4 cylinder for fuel efficiency in your truck? This is not going to make double your fuel economy. You will be pushing that thing so hard to get it to work for you all you'll end up doing is killing your engine. There a lot better ways of improving your fuel economy and still having a truck that will move out of it's own way.
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I may put "it" into a small nova or monte carlo.
I still believe it will help fuel economy even in a 1/2 truck because i drive real slow.
By the way, i feel we should switch to the other thread because we kinda hijacked this one.
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If you seriously want 4 cylinders why not put a 2.5L 4 cylinder in it? You could probably get a car with one for $50 bucks and you would have half the weight and half the problems.
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Pls see other post.
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12 years ago I had a 78 chevy truck with a 350 and the motor started knocking in it so I swapped in a 229 ci 3.8 chevy v6 into the truck just because it was laying around. That motor actually pulled the truck very well but it drank just as much fuel as that 350. I don't remember what I ever did with that truck though I think I sold it.
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someone's been watching too much Fast & Furious Tokyo Drift!!!! LOL