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Author Topic: My 'good deal' head story  (Read 15391 times)
Goody_Seven
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« on: April 14, 2010, 10:32:09 pm »

I am just going to share this for those that are always looking for the good deal instead of just buying the correct part from the correct place.

A local guy I know sold me some AFR205s for $1200, fresh from the machine shop where he had two valves replaced from a failed retainer.  They fixed the guides and put new springs and hardware on and said everything was great.  $1200 for ready to run AFR205s is a smokin deal!  Well I wanted to know what the spring specs were because he didn't remember the part number they installed.  Springs had 103lbs on the seat and open was in the really low 300s.  Not good for me, so I told the machine shop I wanted a spring around 140-150 seat and 400ish open.  They set me up with some Comp 953-16 installed at 1.920 (140lbs on the seat, 400 open).  Also had them milled to 58cc, spent $625 that day, so I have $1825 used AFR205s.  Deal is not so great now.  Got them home and had to helicoil 5 valve cover bolts and 1 intake bolt.  Ran them like this for about 700 miles.  Had a small oil leak from my intake rear rail, so I pulled the intake to seal it back up.

I noticed this while I was checking things out.  In the repaired cylinder:


Great, off come the heads and back to the machine shop.  I went to a better quality machine shop this time because in the 700 miles the car ran, I found SBFtech and learned I was not operating my springs in the correct operation height.  I was running .270 above coil bind, and it seems the machine shop was not aware of this 'happy zone' either, so no return customer from me.  Quality shop pulls them apart and finds the guides are loose and moving.  Pushed them out to find they are upside down and knurled and glued to keep them in and the valve job was shit:



Another issue was the repaired guides were a straight .500 guide, all the other cylinders had a .560 top with a .500 down the hole.  Those two guides obviously had a different valve seal than the rest, and my spring seats had .030 gap all the way around from touching the guide, so in theory the seat could move around.  The machine shop had to machine a new, one off guide because the hole was no longer .500 and another option didn't exist (affordable one anyway).  I bought new springs and Ti hardware to be correct this time, I had the broken bottom of the guide casting welded and re shaped.  All in all I got out of there for $1100 this time.  So now I have $2925 used AFR205s, the deal is getting worse!  I also had to buy new headgaskets and fluids to do it all again so you could argue in another $200 I didn't need to spend.

So lets see, I have $3125 into a set of nothing fancy AFR205s with Ti retainers?  I could have bought 2 sets of TW FAC190s from Jay and had superior hardware to what I have now.  
Moral:  Just buy the correct quality stuff once, and don't waste time and money on those damn 'Good Deals.'  How much farther ahead I would be now if I spent $1600 on some FACs and $1525 on whatever other parts I wanted, instead of this "GOOD DEAL"!
« Last Edit: April 14, 2010, 11:28:40 pm by Joel5.0 » Logged
Joel5.0
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« Reply #1 on: April 14, 2010, 10:47:24 pm »

My Bad..... but this is something that needs to be a sticky here. I'm sorry to read the result from that "good deal", but Thanx! for sharing that reality check type of experience.
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Outlaw Bill
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« Reply #2 on: April 14, 2010, 10:52:39 pm »

Now you know why buying used heads is a crap shoot.
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« Reply #3 on: April 14, 2010, 11:03:31 pm »

Now you know why buying used heads is a crap shoot.

Im at 50/50 .... Cant loose when they come from t.e.a.

I have bought some stuff where you open the box up and you say wtf!
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Nuts
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« Reply #4 on: April 16, 2010, 06:37:59 pm »

Dude sorry to hear..That stinks
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frop
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« Reply #5 on: April 19, 2010, 10:05:01 am »

Why couldn't they do a .530 guide or similar?

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Marlin
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« Reply #6 on: April 20, 2010, 05:08:56 am »

After my GT40 experience I will never buy used heads again. What a crapshoot.

In my case I bought them from a trusted guy. The problem was he bought them used and had no idea how to tell a good set from a bad set.

Of course I didn't either. Now I know if they aren't NIB they just consider them bad and price them accordingly.
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Marlin

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« Reply #7 on: April 20, 2010, 09:03:21 pm »

damn that sucks
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« Reply #8 on: April 20, 2010, 10:03:00 pm »

sorry to hear, but did you not even look at them or have any idea what you were buying? you got them local.

i had bad luck once buying a set of tw heads sight unseen from out of state,but atleast they were easily fixed for a few hundred bucks! flowed 25+ cfm better than ootb  my $900 good deal turned $1200 but had upgraded ferrea valves and solid roller springs ,ti ret. etc. sold em for $1000

bought a pair of cnc'd canfield's off a guy local so i looked at them before i bought them, $500 plus some car stereo stuff  i had little invested in.
turns out they are the very same ones on this sight if you do a search on canfields, just needed a fresh valvejob and the springcups turned down to be right ,they flowed 325-233 cfm. total $750 these also had 2.08 1.60vlvs  s.r. springs and ti ret.

guess im a cheap ass and will never buy new heads, there are lots of good deals out there you just need to have them cked or know what your looking at.
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goober
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« Reply #9 on: April 21, 2010, 04:21:59 am »

I remember that whole out-of-state head ordeal. Some people.
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« Reply #10 on: April 21, 2010, 10:02:07 am »

Hey Guys: It would be nice if this could be bookmarked someway so that all of the guys that get on and ask about procomp and other crap heads can read this first. This is a real lesson learner and I thank you for the post. I have been in this positon with items purchased in the past and you cant always check stuff out. What about if you see something at a swap meet. You either buy it with a real good visual inspection or it is gone. It would be nice to just go to the stores and buy all new stuff but not all can afford and we have to rely on the word of others. I would suggest doing what I do and if I am in the market for something I research it as much as possible to learn all I can to keep from getting taken. But it does not always work and you will get bit at times.
Good Luck
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« Reply #11 on: April 21, 2010, 11:55:56 am »

Now you know why buying used heads is a crap shoot.

Exactly.  I don't EVER put anything used on my Merc.  I've learned the hard way that lesson about saving the money to buy a new part is the much better route to go!
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« Reply #12 on: April 21, 2010, 03:55:02 pm »

they flowed 325-233 cfm

What series of Canfields?
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« Reply #13 on: April 21, 2010, 10:55:16 pm »

sorry to hear, but did you not even look at them or have any idea what you were buying? you got them local.

I looked, but they were not cracked then.  I didn't notice the guide sizing either, the machine shop on the other hand took them apart should have seen it?  What can you do?
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« Reply #14 on: April 22, 2010, 11:45:36 pm »

they flowed 325-233 cfm

What series of Canfields?
20-450-58-1
they are fully cnc'd by who knows?

its a shame when you cant trust your local machine shop,hope you have better luck in the future.
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