Re: Project... Tinker !!!
 

I was wondering why that cam sounded so healthy. Only 14 valves were opening:lol:

Re: Project... Tinker !!!
 

I've been building engines with Comps for years with no problems, but that doesn't mean they didn't ship one out without it being case hardened. It happened to GM in late 60's, and it could have happened at Comp. Either way that sucks, and I hate to hear about that.

Re: Project... Tinker !!!
 

I'm not saying they make junk . I had a bad experience and I don't forgive real easy . I will choose not to run them in the future . I hope this doesn't happen to anyone else and i got all the bad luck !! Bob

Re: Project... Tinker !!!
 

I totally understand. If my first product from a manufacturer was bad, I sure wouldn't be in a hurry to buy from them again ESPECIALLY since customer service didn't help you out any.

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Yup They acted like since I didn't have a shop with my name on it or I wasn't what they call a "professional" I must be a automatic retard !!! So I felt that people like that don't need my money!!! Bob

Re: Project... Tinker !!!
 

Bob, Im there with you

Its the only comp Ive ever ran & it sure doesnt make me want another one... Im not saying my brother couldnt have done something wrong, but I highly doubt it
I mean, hes about as picky / pefectionist as I am on engines & I dont think he would have just been a "Auto Retard" :rolleyes:

I called Lunati & had a great experience with them... I called TALKED TO A PERSON, then that person tranfered me to ANOTHER PERSON !!!!
Great deal :metal:
I did call back later & the time between the first person & the second person was a lot longer than the INSTANT transfer I got the first time, but it sure beats the heck out of a lot of other companies that you have to have a user manual to get through the Auto system

BTW Bob, I showed you 2 cams... the 00017 & the 00010
Which one did you like better ???

Im thinking the 00010 even tho its prolly a lil big for my engine, it should be sweet

Re: Project... Tinker !!!
 

I know right

The crazy thing is, it didnt run too bad :lol: :D

Re: Project... Tinker !!!
 

Everyone makes mistakes, even comp and especially folks that don't build motors for a living, even those that do make mistakes.

I'm sure what the comp guy was implying is that your not a "professional" builder, have a machine shop or install cams on a daily basis, it either came out wrong or was misinterprited. They would be around as long as they have if they built junk. (IMO)

Re: Project... Tinker !!!
 

I agree with that for the most part, but I also think it could be possible that they do occasionally send out some less than quality products

Re: Project... Tinker !!!
 

Absolutly, with what they produce per month, that is bound to happen.

Re: Project... Tinker !!!
 

not to stir somthing up or point fingers, BUT didnt your motor have alot of other probleoms to? maybe on that could of cause the cam to have probleoms. were there metal shaving in the oil?

Re: Project... Tinker !!!
 

I havent drained the oil but last time I changed it, it didnt have any
And it has ran the same since I owned it

I had gotten it hot one night & thats why I stopped driving it, but that wouldnt round the lobes off like that... or at least not that quick

Re: Project... Tinker !!!
 

Sorry I wanst more specific, but that last question was directed towards bob68327

But, what might be the case of your probleom could be when the cam was swapped the lifters got mixed up? About how many miles or how old was the motor/ cam? Im sure it wasnt purely from normal wear, just becasue of the other lobes still being in good shape.

Re: Project... Tinker !!!
 

It had crank issues . The cam lobes don't get oil from the mains . Yes there was metal in the oil but the cam lost enough of it there had to be . I don't care about that motor anymore it just gives me a headache!! On to bigger and better things . Like i said before I wasn't saying all comp cams are junk!!! I just had a bad experience . Let's leave it at that !! Have a Nice Day !! Bob

Re: Project... Tinker !!!
 

Lunati are good people !! I would try the 00010 !!! Bob

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Thats what I was leaning towards :metal:

Re: Project... Tinker !!!
 

im sorry, i know its a sore subject but... why did you even call comp if you knew the cam wasnt getting oil? or did you not know this at the time?

i just dont want anyone to badmouth a good company without a good reason.. sorry if this is a sore subject;):chevy:

Re: Project... Tinker !!!
 

Good points and I agree.

Re: Project... Tinker !!!
 

O. K. 1 more time the cam journals get oil from the crankshaft!! The cam bearings in my motor looked like brand new !! The cam lobes do not get oil from the crank they get oil from the rods slinging it . So the flat lobes are not from a lack of oil or the crank not related . I think I also said that I didn't mean comp cams made only junk just that I had a bad experience !! This is why I don't post my thoughts because it gets all twisted and I get fed up ! Bob

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X 2 !!!!

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sorry, like i said i wasnt trying to start a pissing match.

i'll stop :uhmk:

Re: Project... Tinker !!!
 

many engine builders have complained of this problem in recent years.The best reasoning that has been put out there is that all oils have been reformulated to meet todays roller cam motors.Many of the additives that use to be in motor oils have been remove to make the EPA happy.I think zinc is one of the main items removed.Flat tappet cams have higher stress points than roller cams witch is cousing the problem.The best "fix"that I have seen is using Rotella "diesel"oil it still has all of the additives of the older oils.You can buy it in most of the conventional weights IE 15w40 ect.

Re: Project... Tinker !!!
 

I agree !!!

Re: Project... Tinker !!!
 

Me either !! I'm sorry also !! ;)

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Good gosh, what have you done to my thread !!!

Clean it up now, you lil mongrels :lol:

Re: Project... Tinker !!!
 

Well Im currently debating engine stuff

Im still trying to figure out exactly what my compression ratio is, because the other day when i figured it up it was in the 8's & I need more than that

So if I cant figure out a easy way to bump it up, Ima test fire a engine I have laying around & if its ok, then Ima swap it in till I build my 283 how I want it

Re: Project... Tinker !!!
 

I agree man !! I am really sorry about all that it was probably my fault !! I have the right to remain silent !! But I lack the ability!! Sorry again for messin up your thread !! I will pm you when I get home tomorrow and you can give me a ring !! Bob

Re: Project... Tinker !!!
 

Sounds like perfect compression for a weind 144 blower !!! It would fit under the hood too !!!!:metal:

Re: Project... Tinker !!!
 

what kind of pistons does it have? they looked like flattops in the picture. and especially with 60cc heads that should be around the 10-10.5 mark, right?

i have 64cc heads on my nova with .125" domes and its supposed to be 11.5:1

Re: Project... Tinker !!!
 

He has a 283, so it is compressing a lot less volume into the chambers, so it will have a lower compression ratio than a 302 even with the smaller chambers.

Possibly shave the heads to raise the compression? That would cost a few bucks but may bump it up a little bit. 283's are a great sounding engine...I had a buddy with one in a '67, and for some reason it sounded distinctly different than any other SBC I've heard.

Re: Project... Tinker !!!
 

so now you want more compression, when you did these mods to the heads to lower compression? im not sure, but arent stock 283's around 9.5:1 with 58, or maybe even 64 cc combustion chambers? i'd say 9.5 or even 9:1 should be a good compression ration to shoot for. i have ran 92 octane in my car, but for the most part i run 100 octane. i havnt bought it for a few years, but last time i checked it was about $5 a gal... and that was atleast 2 years ago.

another thing to maybe consider is some real thin steel headgaskets. im not sure but they might raise the compression by .1 or .2?

Re: Project... Tinker !!!
 

heres a compression ratio calculator... not sure if you already knew about this one. it seems pretty easy if you measure your stuff, gakets, ect

http://www.csgnetwork.com/compcalc.html

i get about 9.5:1 with the stock 3.875 283 bore, and a 3" stroke... assuming the piston has no dome at all, and assuming theres a little bit of deck clearance (maybe .010-.015"?), and a 60cc combustion chamber, and .025" thick head gasket (pretty thin, i think most sbc head gaskets are more like .045")

Re: Project... Tinker !!!
 

The deck height is whats killing it. We haven't remeasured it, but it was .040, with a gasket thickness of .042. The bore is 3.915 and the stroke is 3" even. The other problem is not being able to find gaskets the have a smaller cylinder bore size than 4.1. Needs about 3.95 to 4" even. We did find steel gaskets with a thickness of .016, that would help. Does anyone know the bore size on the gaskets for a 305, they should be smaller, maybe not too small.
When he first decided to go with these heads, he thought the CR might be up around 11. but it isn't turning out that way.
Matt worked on the heads to improve flame travel and decrease detonation points. That way he could run more compression with reg pump gas. He would like it in the low 10 to one area.
He's put quiet a bit of time into modding the heads and doing research for this. It's still experimental, but maybe it will work. Few things that are different are easy.
Lee

Re: Project... Tinker !!!
 

Thanks for clearing that up pop

Nova, like my dad said, I wasnt modding my heads to reduce compression but to make them more efficient
Also the heads that were on the 283 to begin with were 60 cc, so I shouldnt be changing the CR
I think we made a bad measurement & that is throwing things off, as I was under the impression that the 283 had 9:1 CR like you said


Bob, sorry but the only ring I could find for you was 2 karat... is that ok :haha:

http://i81.photobucket.com/albums/j2...ement_ring.jpg

Re: Project... Tinker !!!
 

You have one to donate ??? :chevy:

Re: Project... Tinker !!!
 

UMMMM Nope !!!! :lol:

Re: Project... Tinker !!!
 

Well after researching some stuff on my 283, I wasn't gonna have the CR that I want
So I dug out a old engine that I got from GringoLoco last year (sposed to be a good engine, maybe needed to be rebuilt) & I pulled the heads off to see what kind of shape it was in

http://i81.photobucket.com/albums/j2...7_05090018.jpg
http://i81.photobucket.com/albums/j2...7_05090029.jpg

Low compression POS pistons :waah:

So I decided that I would pull the pan & check out the crank

http://i81.photobucket.com/albums/j2...7_05090030.jpg
http://i81.photobucket.com/albums/j2...7_05090032.jpg

Come to find out, its a 4-bolt main :metal::metal::metal:

http://i81.photobucket.com/albums/j2...7_05090035.jpg

So its a good block to rebuild & start fresh with one of these days :chevy:

Re: Project... Tinker !!!
 

The engine I got from Gringo had a bad timing chain too :lol:

http://i81.photobucket.com/albums/j2...7_05090046.jpg

So I got the caps off everything on the crank & it looked good, so I decided to put it in the engine that came out of my 84 I used to have
The 84's engine had an ate up the crank :waah:

Dont use too much silicone kids ;)

http://i81.photobucket.com/albums/j2...7_05090051.jpg
http://i81.photobucket.com/albums/j2...7_05090053.jpg
http://i81.photobucket.com/albums/j2...7_05090052.jpg

But the 84's engine had good pistons & you can still see the hone marks :metal:

http://i81.photobucket.com/albums/j2...7_05090061.jpg

Re: Project... Tinker !!!
 

The Cylinders atleast need to be honed, there is some pretty good wear from the pistons. What's that "dent" in the right cylinder at about 7 o'clock on the first ring?

Re: Project... Tinker !!!
 

The cylinder walls really arent that worn, just the flash brings it out more than it is

And I had the cylinders coated in white grease for storage, so its prolly just some of that that you are seeing

The engine is good, I have no doubt of that