347 start comming soon!!!

[Nosboss]

347 first start comming soon!!!

I have not posted any progress on this forum, but I have been at it a good portion of the winter. I have built a CHP 347 in a roller block with 10.2-1 compression. It has forged pistons, rods and a cast Scat crank. All hardware is ARP. The heads are twisted wedge and the valve train is Comp Cams. Cam is the XE282HR which is a good all around cam. It is a carbed motor so I have a Weiand stealth intake and a Proform 650 carb. Misc items are the Mallory comp 9000 dist, Canton road race pan, fabricated valve covers, Headman elite 1 5/8 headers, aluminum water pump and many other new items. I am guessing around 340hp and tq to the rear tires. Here are a few pics for you guys to look at. BTW, its all in my '66 coupe. Feel free to navigate my photobucket album as there is lots of pics throughout the motor build, most of them are on the first couple of pages.

 

[jasonn]

Looks VERY nice. I think making your goal will be no trouble at all. That is a nice bright blue also.

 

[Shakin66]

I love the build so far, keep it up.
What trans are you planning on?

 

[SnakeStang65]

Wecome to the 347 Club

You will not be disappointed... Just took mine for the first spin of the season... It really reminded me of why I did the 347. No regrets... Except for one...

MORE TIRE!!!

Guess it is a good problem to have...

John

 

[jcode68]

Very nice, reminds me of when I did my 347 swap. Isn't it great working with all new & clean parts? I see you are using a front cover dipstick. Make sure you plug the hole for the dipstick tube on the drivers side of the block. CHP doesn't do this even when you specify the use of the old style timing cover, nor do they tell you about it in any paperwork - ask me how I know Chased an oil leak for a couple of weeks before someone on Stangnet tipped me off to the hole Keep the pictures coming and let us know after you have fired her up.

 

[Nosboss]

Thanks for the compliments guys! I am going with a T5 transmission. I am actually doing that swap at the same time. It has been quite a conversion if you ask me. I will be painting my T5 crossmember tonight that I built and mounting it for the last time. I also picked up my driveshaft today. My valve covers have not shown up as of yet so that will hold me back from starting it. The day isn't over yet though.

I hope to have traction issues when its done. That way I know I am making good power. My drag radials are 225-50-15 and I don't think they will even hold the power.

 

[Nosboss]

Its alive, Its alive, Its alive!!! The motor fired right up after just three pumps of the gas pedal thanks to the electric pump. Oil pressure was steady at 60lbs. We set the timing and let it idle for a few minutes. Looked under it for leaks and all is well. The new motor is very snappy when I hit the gas. I don't remember the last motor having that snap. I still have a few hours worth of work to get it all finished up before it can come back down off of the stands. Then it needs to hit the alignment shop. I will post some pics later.

 

[Nosboss]

Here is a pic I took on my phone. All there minus a good cleaning of the engine bay(didn't do anything with all the crazy wires under the hood yet). Bitchin!

I hope to have a video this weekend too.

 

[Shakin66]

I remember the first time I started mine and the sense of pride that I had. knowing I had touched every part and tightened every bolt.

I have a lifted Diesel Excursion that is my daily driver but as I walked out of the garage I noticed that it had not remote started. As I suspected the battery was dead and instead of getting mad I smiled ear to ear knowing I was going to get to drive my car...Cant wait for 5:00, I am taking the long way home tonight.

 

[Nosboss]

Here is a quick video of the car running(taken with a crappy digital camera)... its about 10 degrees outside.

 

[Nosboss]

The glory of a new motor was short lived. I started the motor up sunday and it had no oil pressure. I am not sure if it happened friday night when I was headed back from a buddies house or when I started it sunday. I only had 50 miles on the damn thing. It didn't make any weird noises or ticking so I think the bottom end is ok. I decided to pull the pan cause I'm thinking the oil pump was bad. I ended up finding a small oil galley plug all chewed up in the bottom of the pan. At this point I'm pist because I know the motor has to come back out. So, I called tha machine shop and they wanted me to bring in the long block so they could fix it. I dropped it off yesterday and they said they would tear it down and replace anything that was messed up and clean it out entirely. Looks like they are standing behind their work.

 

[SnakeStang65]

Very sorry to hear that.

Honestly, that is a very common mistake by most engine builders/rebuilders. They replace the plugs, but do not stake them properly. Even when you you have staked them correctly, they can still come out. On all the engines that I have done, I have even moved past staking them and replacing them with screw in plugs as insurance.

Good luck and pass this tidbit on to your rebuilder. I am certain that they will complain as they will have to flush all the oil galleys afterwards, but it is worth the effort when done properly.

John

Just noticed that you stated that it is CHP 347. That should be an issue for CHP as they should know better than to put the stake in plugs...

 

[pyroman]

Oh man, I'm sorry to hear about the issues! Makes me nervous as I am doing my first engine build. I'm hoping to get mine in the next few weeks.

Quick question for you though. I notice you have that pin style plastic connector on the coil wires. I want to do that with my MSD ignition, but I can't seem to find where to buy them, where did you get them?

 

[Nosboss]

Very sorry to hear that.

Honestly, that is a very common mistake by most engine builders/rebuilders. They replace the plugs, but do not stake them properly. Even when you you have staked them correctly, they can still come out. On all the engines that I have done, I have even moved past staking them and replacing them with screw in plugs as insurance.

Good luck and pass this tidbit on to your rebuilder. I am certain that they will complain as they will have to flush all the oil galleys afterwards, but it is worth the effort when done properly.

John

Just noticed that you stated that it is CHP 347. That should be an issue for CHP as they should know better than to put the stake in plugs...

First off, the rotating assembly is CHP, but the machine work was done at a local shop.

The machine shop told me they were going to replace the plugs with threaded ones this time around. My last motor had screw in galley plugs. I have no idea why I didn't think about doing it to this motor.

I did notice that the plug that did come out only had two stakes where the others had 4. I'm sure that is why it came out. I am really pist about the whole thing, but on the other hand i'm glad the machine shop is standing behind it.

 

[Nosboss]

Oh man, I'm sorry to hear about the issues! Makes me nervous as I am doing my first engine build. I'm hoping to get mine in the next few weeks.

Quick question for you though. I notice you have that pin style plastic connector on the coil wires. I want to do that with my MSD ignition, but I can't seem to find where to buy them, where did you get them?

pm replied...

 

[Nosboss]

I forgot about this thread... I have been consumed by other hobbies since this happened.

BTW, the 347 is running great. I got it back from the machine shop and re-installed the motor. Have not looked back since. I have over 2k on it now with many full throttle runs. In fact, it never comes back home unless the throttle hits the floor. lol.

I hit a mustang brand dyno with 150 miles on the motor and it made 339hp and 338tq. I plan to remove the direct drive cooling fan and install a new set of lifters in hopes of a few more ponies. The stock lifters are collapsing around 5800 rpm's.