152 Build, Cam, Carb, Questions

[paden5971]

Hello to all, I have a 64 s80 with 152 ci motor, and 30 in tires. I have some questions on how to get decent hp and a reliable motor.

Some background on my 64. This rig has narrowed d44 in the front and rear we still havent come to a gear ratio yet, I have purchased a header, a pertronix ignition and coil, new poly tanks and sending units, and a 13 circuit wire harness that I have not installed. The motor is at the machine shop, it has been gone through and is in decent shape.

The plan is to take the block .30 over, deck it, grind flywheel ect. With flat top pistions, and put in a split cam kit. I was just going to gasket match the head untill I found ihon and the ultimate 4 banger. Im doing my reasearch for the head that was recomended. Will a header for a 152 head work with the different head. I have not bought any internal parts for the motor yet. I would like to keep the outside appearence of the motor and body looking stock, if that's possible

now that you know what im doing I would like some advice on the carb and engine set up, im not the most advanced guy when it comes to motors. I read on a few threads that ihon or someone affiliated with them is doing some work with getting the 1904 holly to preform better. I am building this rig to be a daily driver. I would like to get all hp out of the motor that I can and still be able to count on it to start and drive every day.

Thanks, any advice is welcome

 

[Michael Mayben]

hello to all, I have a 64 s80 with 152 ci motor, and 30 in tires. I have some questions on how to get decent hp and a reliable motor.

Some background on my 64. This rig has narrowed d44 in the front and rear we still havent come to a gear ratio yet, I have purchased a header, a pertronix ignition and coil, new poly tanks and sending units, and a 13 circuit wire harness that I have not installed. The motor is at the machine shop, it has been gone through and is in decent shape.

The plan is to take the block .30 over, deck it, grind flywheel ect. With flat top pistions, and put in a split cam kit. I was just going to gasket match the head untill I found ihon and the ultimate 4 banger. Im doing my reasearch for the head that was recomended. Will a header for a 152 head work with the different head. I have not bought any internal parts for the motor yet. I would like to keep the outside appearence of the motor and body looking stock, if that's possible

now that you know what im doing I would like some advice on the carb and engine set up, im not the most advanced guy when it comes to motors. I read on a few threads that ihon or someone affiliated with them is doing some work with getting the 1904 holly to preform better. I am building this rig to be a daily driver. I would like to get all hp out of the motor that I can and still be able to count on it to start and drive every day.

Thanks, any advice is welcome

Welcome to ihon!

The best thing you can do with that motor (other than careful assembly) is have it balanced while it's apart and after the flywheel has been surfaced.

Yes, the header will match with any IH I-4/sv head, the exhaust port sizes and locations are identical on all heads, only the intake port sizes are different (152/266/304 are the smaller intake ports).

I do the carb work and manage this forum for ihon (along with many other duties!), we have a business arrangement whereby I operate from my location in central oregon. So...yes...Jeff (our owner) is the boss and I'm hired help!

There are really no performance mods for a 1904 carb as such, just careful attention to inspection and assembly detail. They are excellent carbs if correctly assembled with a functional main well assembly and unless you are going to set up an intake manifold that can take advantage of a weber dg series carb, I think that is cash wasted. Ya simply cannot make any more air/fuel mix go through that intake manifold hole unless ya go forced induction of some sort.

One way of taking advantage of the weber carb is found here, though that is an open-ended thread as that particular project evolves. The intake manifold that I botched is being repaired by a welder right now, I hope to be able to install the semi-final version of that manifold in the next few weeks:

http://www.forums.IHPartsAmerica.com/fabrication/846-IH-152-196-intake-manifold-rework-2.html

That thread is related to this one:

http://www.forums.IHPartsAmerica.com/carb-tech/1281-alternative-I-4-engine-carburetion.html

 

[paden5971]

Thanks michael, ill be sending my 1904 off to ihon to get it done. I have another question for you on the head, I have spoken to a lot of Scout part dealers and a few have mentioned a man in Colorado that has a cnc machine that will port and polish Scout
heads, its costly from what I hear but is having this done going to be worth the $ 300 in the end. Is there any other items that I can put on this head, a better rocker, ect to increase performance? I will have the 152 balanced, do you have any idea how many horses this motor will be capable of in the end.

Thanks

 

[Michael Mayben]

thanks michael, ill be sending my 1904 off to ihon to get it done. I have another question for you on the head, I have spoken to a lot of Scout part dealers and a few have mentioned a man in Colorado that has a cnc machine that will port and polish Scout
heads, its costly from what I hear but is having this done going to be worth the $ 300 in the end. Is there any other items that I can put on this head, a better rocker, ect to increase performance? I will have the 152 balanced, do you have any idea how many horses this motor will be capable of in the end.

Thanks

$300 for a cnc port job on one of these heads, better verify that! I'd say an "average" cost for that is closer to $800 each, and I know who you are talking about in co! Worth it? Not in my book, I can do alotta grinding on my own for $800>$1000 per head (at $50 a labor hour)!

Just a typical "rebuild" of a normal head without any parts runs about $115 average from the machine shop I use locally. For a super-duper, multi-angle setup, the labor charge is $215 per head plus parts. That does not include a port clean-up or any type of port work, but does include bake and blast cleaning of the head itself. Magnaflux charge is extra, that must be done before spending any money for head work.

There is nothing wrong at all with the oem rocker assembly, ya just use good (or new) parts that are clean! You rebuild the oil pump and "maybe" shim the pressure regulator valve one step.

All the information you are throwing out has been discussed throughout threads right here in this sub-forum, the "carb" sub-forum, and the "ignition" sub-forum. Any topic that pertains to an sv (IH v8 engine) also pertains to the I-4 (152/196). And you will see several discussions regarding camshaft selection, we have the performance cams for the "early" I-4 motors on the shelf right now.

With careful assembly and parts selection, I think 130hp+ is achievable without going overboard.

 

[Provience]

Also, when you rebuild your oil pump, please verify the assembled oil pump drive shaft to pressure plate clearance prior to installation. I had mine sieze and it turned into a major pita to do-over.