C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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My first rebuild

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Old Dec 10, 2012 | 01:25 PM
  #381  
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Originally Posted by hugie82
That looks like a good spot to pick up fresh air but how are you gonna deflect water so the filter doesn't get soaked?
I'm not pulling from the top


I put a different scoop on my car for clearance


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Old Dec 10, 2012 | 01:58 PM
  #382  
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Fatcat, someone might have mentioned this earlier, but in case they haven't...

You can save money on the front end by using Vortec heads, but aluminum heads allow you to run about one more point compression (say, 10.0:1 vs. 9.0:1) over iron heads. That, and a set is about 50 lbs. less weight off the front end of the car. That's like, 7 horsepower plus whatever horsepower you gain just by running an extra point of compression. They also allow you to run lower-octane gas for an equivalent compression ratio because they bleed off more heat.

If your target is a 400 HP 350 on pump gas, you can likely get there with a decent set of aluminum heads, 10.5:1 compression, 91 octane gas at your altitude with the 'right' cam. If 400 is the number you're looking for then you should be able to get there with that as a basic formula.

To calculate compression, you will need to know what the deck height of your pistons will be, and to know for sure what that is you will have to 'mock up' one piston+rod combination and put it at four corners of your block to see how far 'down in the hole' your piston tops are. While quench height is an important number, it's impossible to know EXACTLY what yours will be until you put YOUR parts in YOUR block.

Once you've done that, you can figure out what combination of parts will get you to the compression number you're looking for...

Last edited by birdsmith; Dec 10, 2012 at 02:04 PM.
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Old Dec 10, 2012 | 10:23 PM
  #383  
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yep 30 over
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Old Dec 10, 2012 | 10:35 PM
  #384  
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Originally Posted by jb78L-82
I have a problem I think with my 882 heads on my L-82 and was thinking about having them rebuilt as well only for originality purposes since everything internal on the motor is OEM (66,000 miles). My dyno guy tells me that to correctly rebuild the 882 heads, I am looking at around $1,000 for new stainless steel valves, seals, valve springs, valve guides, 3 angle valve job etc. Was just wondering what $400 dollars would get you. Are talking $400 to rebuild the heads yourself without machine work? Just wondering. Thanx.
you should probably start a new thread with this question. I am no expert on heads, but from my reading, no way would I drop $1000 on 882's, edlbrock has aluminum heads with better flow for less money and they are new.
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Old Dec 10, 2012 | 10:46 PM
  #385  
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1000 bucks will buy a nice set of aluminium heads that will outperform 882s all day
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Old Dec 10, 2012 | 11:14 PM
  #386  
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yep
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Old Dec 12, 2012 | 11:02 AM
  #387  
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How'd the honing going Fatcat?
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Old Dec 12, 2012 | 11:31 PM
  #388  
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Originally Posted by hugie82
How'd the honing going Fatcat?
Hey brother! 3 cylinders to go, it took a minute to get it but I figured it out. I will finish the cylinders tomorrow and my rebuild kit should come in tomorrow....Getting excited!

On another note, I have a very close friend who bought a rebuilt transmission a couple years ago for a project he never really even started. Anyway, he said it was and overdrive tranny and I could have it, just come pick it up. It was for a 87 Camaro. Any thoughts on this or how I can figure out what it really is? He said he thought is was a 700R4 but wasn't positive. What say you guys?
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Old Dec 13, 2012 | 01:33 AM
  #389  
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do it, 87 is the start of the good years of the overdrive transmission that don't require a computer..... do it, do it now

and even if you don't use it - it's 1500 worth of trading stock
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Old Dec 13, 2012 | 02:04 AM
  #390  
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Originally Posted by FatCat
Hey brother! 3 cylinders to go, it took a minute to get it but I figured it out. I will finish the cylinders tomorrow and my rebuild kit should come in tomorrow....Getting excited!

On another note, I have a very close friend who bought a rebuilt transmission a couple years ago for a project he never really even started. Anyway, he said it was and overdrive tranny and I could have it, just come pick it up. It was for a 87 Camaro. Any thoughts on this or how I can figure out what it really is? He said he thought is was a 700R4 but wasn't positive. What say you guys?
DUDE!!! If I were you, that tranny would be in the back of my pick-'em-up truck right now! Jeezum, I wish I had friends like that!


Scott
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Old Dec 13, 2012 | 08:38 AM
  #391  
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Ok then! I guess I better go get it and get ready to pull mine out. Will it take much modifying to get it in my car?
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Old Dec 13, 2012 | 09:30 AM
  #392  
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Originally Posted by FatCat
Ok then! I guess I better go get it and get ready to pull mine out. Will it take much modifying to get it in my car?
Now I'm going to have to go find my automatic shifter.... I can't remember if it has detents...

figure it does - so shop CL for a decent B&M quarter stick shifter, if you get it cheap enough, you can buy the right detent part to convert it to 4 speed.

you may need a shorter driveshaft, and potentially a U-joint from a turbo 350 (if you car doesn't already have one).

I've cheated on that swap by using a turbo 400 driveshaft with a turbo 350 yoke (400 is the sameish length as a 700)...

you'll also need the wiring kit for the lockup controller.... cheap, cheap - most are just a switch that you can turn on so that it can lock up at 35 mph....

and let me be the first to warn you..
in caps
THE CABLE THAT GOES TO THE CARBURETOR IS NECESSARY AND MUST BE PROPERLY ADJUSTED - so do buy the right connector for connecting the cable to whatever carb you use.... it's not something you can "just wing". if you do, you'll burn up the transmission because the cable tells the transmission where, when and how to shift

Last edited by SuperBuickGuy; Dec 13, 2012 at 09:35 AM.
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Old Dec 13, 2012 | 10:25 AM
  #393  
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Originally Posted by FatCat
Ok then! I guess I better go get it and get ready to pull mine out. Will it take much modifying to get it in my car?
I think the tailshaft housing has to be replaced because camaro used a long arm from the trans tail to the rear instead of a crossmember and mount like our C3 .
Your shifter is the same as my 82 with the 700r4. I made a small cut in the shifter detent to get low 1 but low 2 through Park is all the same and that's how the 82 came from the factory. There was a guy on here I think his name was VetteMD or MDVette he has some real good pics of his build and his shifter modification .
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Old Dec 13, 2012 | 01:58 PM
  #394  
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Your drive shaft will have to be shorted also

If the trans was stored outside? You better think twice but if its for free its still worth something. For some reason every trans I've used that was stored outside with a trap or cover always seemed to blow up on the first day
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Old Dec 13, 2012 | 02:01 PM
  #395  
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Originally Posted by hugie82
Your drive shaft will have to be shorted also

If the trans was stored outside? You better think twice but if its for free its still worth something. For some reason every trans I've used that was stored outside with a trap or cover always seemed to blow up on the first day
No, he has it stored in his shop on a pallet but not covered.
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Old Dec 13, 2012 | 02:18 PM
  #396  
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Lot of time on my hands waiting for parts!!
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Old Dec 13, 2012 | 02:30 PM
  #397  
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Nice job duplicolor caliper paint?
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Old Dec 13, 2012 | 02:35 PM
  #398  
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Originally Posted by hugie82
Nice job duplicolor caliper paint?
Thanks! Yes sir, I was shocked to see you have to hand paint them on mommas kitchen table...hahaha
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Old Dec 13, 2012 | 04:07 PM
  #399  
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Fatcat, if you don't mind sleeping on the couch for awhile, take all four of those babies and bake them in the oven for an hour or so, right after you wash a load of greasy parts in the dishwasher!!
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Old Dec 13, 2012 | 04:20 PM
  #400  
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Hey I could get away with that baking part! You are talking about after they are painted right? What temp?
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