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Post by copenhagen on May 21, 2010 19:09:27 GMT -5
I know this is an old thread, but I also have a 383 from CHS. I bought it about 5 years ago, and it never did seem quite right. I would sit and mess with it, trying to get it running right, and finally got fed up with it. so the truck sat for a long time, while i did other stuff.
I had Savas auto tuning, put together a carb for this motor, and even that didnt help.
Fastforward to present time. I really wanted to get back to wheeling my blazer, i got sick of it just being a big waste of space in the garage. So i contacted savas again, and brought my truck down there.
Come to find out, the first carb he built for me, was built with the wrong cam shaft specs. CHS wrote down the wrong specs on my build sheet. Luckily I got a cam card from CHS, sometime after i had the first carb built.
Savas did an amazing job at getting my motor running tits.
But it still has a slight diesel sound, coming from the motor. I searched a little about it, and it sounds like it could be piston slap.
I just got off the phone with CHS, and the guy basically said that it "cant be piston slap" its probally pre detonation.
I dont know what to believe.
Im stuck between mildly building the 454 in my garage, and just waiting for the 383 to puke, then having a motor ready.
Or selling the 454, and having the 383 dialed in by a competent builder.
Either way, im really fawking irritated, that it appears im going to have to dump even more money into something, that shouldve been done right in the first place.
Going to talk to a tech at CHS next week, but im not holding my breath for them to give me a fix, over the phone.
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Post by Leeland on May 24, 2010 9:32:17 GMT -5
Id build the 454 and run the crap out of the 383. If it is piston slap theres two ways to fix it. One go bigger on the bore and two sleeve it and start over. So in that since you just might as well start over with the bbc with some one competent. I knew a guy and he had a shop in the salem area do a engine for him and they took a little too much out of the bore and he ended up with piston slap.
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Post by Rock Dawg on May 24, 2010 12:49:00 GMT -5
I'd build the 454 also. Nothing on my 383 was like it should be, according to the build sheet. My 2.02 heads are realy 1.94, No realy port or polish that I can see. The cam specs don't mach, the vibrator dampiner was suppose to be a special water balancer, it is not. I don't think they are ARB bolts for the rods, head exec. I have not really looked but I wonder it if is really a 383. I will have to take it to a shop to tell.
I also had a relitive that had a 350 built their. He also had problems and eneded up selling his truck as well because if the issues...
Just today my wife's co worker was going to pick up a motor from CHS. I don't know what he will do now that he knows what type of work they do.
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Post by copenhagen on May 25, 2010 1:16:45 GMT -5
Id build the 454 and run the crap out of the 383. If it is piston slap theres two ways to fix it. One go bigger on the bore and two sleeve it and start over. So in that since you just might as well start over with the bbc with some one competent. I knew a guy and he had a shop in the salem area do a engine for him and they took a little too much out of the bore and he ended up with piston slap. The guy i talked to today from CHS, was confident that it isnt piston slap. He said "we dont run them that loose with the hypereutectic pistons" on the build sheet it says the engine was bored .040. Ive never built a motor, so i dont know much about the ins and outs of that. He told me to adjust the valves again, and this time turn them a 1/2 turn, instead of the 1/4 turn i usually do. I have a gut feeling, that this will not solve shit Id really like someone with some knowledge to listen to the motor. It might just be a sound that is normal, and no big deal. But i dont want to take the chance.
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Post by Leeland on May 25, 2010 14:31:08 GMT -5
If its detonation I can think of a couple causes, intitial and timing curve, a/f ratio, inproper distance from the deck of the piston to the quench area of the head. Good luck with it, hope you figure it out.
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Post by straightaxle on May 25, 2010 15:42:29 GMT -5
Did you by any chance pay with Visa? My brother bought a motor once from a shop and it had all kinds of problems and the company stopped honoring its warranty. His gas motor sounded like a diesel. Long story short his wife called Visa and explained everything they'd been through and Visa took the money back from the company and credited their account. It was suggested to me to buy "big" purchase with Visa/MC or AmEx just for this reason.
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Post by Rock Dawg on May 25, 2010 16:34:00 GMT -5
Id build the 454 and run the crap out of the 383. If it is piston slap theres two ways to fix it. One go bigger on the bore and two sleeve it and start over. So in that since you just might as well start over with the bbc with some one competent. I knew a guy and he had a shop in the salem area do a engine for him and they took a little too much out of the bore and he ended up with piston slap. The guy i talked to today from CHS, was confident that it isnt piston slap. He said "we dont run them that loose with the hypereutectic pistons" on the build sheet it says the engine was bored .040. Ive never built a motor, so i dont know much about the ins and outs of that. He told me to adjust the valves again, and this time turn them a 1/2 turn, instead of the 1/4 turn i usually do. I have a gut feeling, that this will not solve shit Id really like someone with some knowledge to listen to the motor. It might just be a sound that is normal, and no big deal. But i dont want to take the chance. He was confident mine wasn't piston slap either. When I pulled mine down several pistons had broken. Some from the piston skirts, others from the top corners of the piston. They also told me repeatedly to “re adjust the valves”… I hope your’s turned out better then mind did.
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Post by Leeland on May 25, 2010 20:18:54 GMT -5
Id build the 454 and run the crap out of the 383. If it is piston slap theres two ways to fix it. One go bigger on the bore and two sleeve it and start over. So in that since you just might as well start over with the bbc with some one competent. I knew a guy and he had a shop in the salem area do a engine for him and they took a little too much out of the bore and he ended up with piston slap. The guy i talked to today from CHS, was confident that it isnt piston slap. He said "we dont run them that loose with the hypereutectic pistons" on the build sheet it says the engine was bored .040. Ive never built a motor, so i dont know much about the ins and outs of that. He told me to adjust the valves again, and this time turn them a 1/2 turn, instead of the 1/4 turn i usually do. I have a gut feeling, that this will not solve shit I couldnt read all of your post cause of my phone but no it shouldnt be making noise if it were machined right especially if they are hyperpathetic pistons. Ive heard forged pistons can make noise when cold because of their expansion and having to go a little bigger to compensate but my 302 has forged trws in it and doesnt make noise. Hes just full of it, Rockdawg has a good idea about the visa thing. And as far as his engine with broken skirts yah my foot it didnt have piston slap, where is this place at so I know where not to bring my stuff?
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Post by Deleted on May 26, 2010 17:19:55 GMT -5
Call the BBB and force them to buy the engine back from you. If not, take them to small claims court. If you run it till it blows after you know there is a problem, you cant do squat. Make sure to take it to an independent shop and have them diagnose the problem if you go that route. Helps if that shop is BBB a+.
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Post by copenhagen on May 27, 2010 12:09:50 GMT -5
its off of holgate... Like 33rd or something. and yea, the valve adjust did jack shit... www.youtube.com/watch?v=-DrI_Yn1fMAheres what it sounds like. Although its almost louder in the video
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Post by Rock Dawg on May 27, 2010 13:41:49 GMT -5
Hmm.. Sounds just like my 383 did. I bet it has no power as well. Mine was supposed to be built. My old stock 350 would out run it. Greg, the owner, even went so far as to cuss out my wife and mother, on different occasions. He would just hang up on me. What a piece of work. I really can not believe he is still in business with his customer service skills and the type of work I have seen from his shop.
My wife's co-worker is buying a motor from him at this time. (Against our advice) It is a short block, and I hope he tares it apart and mic's the cylinder walls, check the bearings, exec, and compares it to what the build sheet say's before he puts it together.
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Post by copenhagen on May 27, 2010 14:51:25 GMT -5
Im actually satisfied with the power.
I gave one of the techs there a link to that youtube vid. we will see what they say.
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Post by Leeland on May 27, 2010 19:48:27 GMT -5
its off of holgate... Like 33rd or something. and yea, the valve adjust did jack shit... www.youtube.com/watch?v=-DrI_Yn1fMAheres what it sounds like. Although its almost louder in the video Im guessing that up in portland or the surrounding areas? It didnt sound good in the video.
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Post by copenhagen on May 28, 2010 4:58:15 GMT -5
yea south east portland, 27th and holgate.
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Post by copenhagen on May 28, 2010 16:14:45 GMT -5
Welp, Talked to CHS today, had him listen to the youtube clip. him: "Id say pull it out and bring it down" me: "son of a bitch" Damnit, i was pretty stoked to be wheeling again, now it looks like im out for awhile, again...............................
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