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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-27-2004, 01:08 AM   #41
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Yup, those heads look like L27 heads w/ 87 rockers.... It looks like it'll bolt right on. We'll see soon enough.
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Old 12-27-2004, 01:40 AM   #42
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Well if you can pull that head gasket and clean it up some we can do some serious compairsons. Here'* mine, clean but stock:




As for the rockers, I'll put more than a buck on the fact that your use a 3/8" stud, while '93'* use a 5/16" stud. You can MAKE them fit, but as far as I know they won't bolt on out of the 'box.' It'd be neat if you measured though, just so we can see.
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Old 12-27-2004, 02:03 AM   #43
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Justin, Don't worry, these will be bolt-on before you touch them dude. Just need to drill a little hole and find you some new bolts.
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Old 12-27-2004, 02:04 AM   #44
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Yeah I just finished a convo with Dame, he'* got it covered.
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Old 12-27-2004, 10:22 AM   #45
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Damn, that was easy .

Dr Jay: Those are some mighty clean heads.. what kind of cleaning did that take? Did you get your heads decked by any chance? They look about the depth of mine.. I am still very curious if it is possible to get 9:1 compression. That will give me the added boost I really would like, especially with the extra flow I will have, thanks to the porting.


-justin
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Old 12-27-2004, 08:54 PM   #46
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I just got off the phone with my dad. He gave me some tips on finding out how much clearance I have from piston top to valves. He also said if I shave xx amount off the heads, then that will also lower, and bring closer the intake ports, and the intake would need to be shaved to match that. But it would be different than the head shave amount. He said I need to know the engine V-angle, and then I can calculate it, using Trig. <-- I don't know trig. Would I need to shave the intake too? Or is he being his typical ******* of a self, and bsing me?


-justin
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Old 12-28-2004, 02:57 PM   #47
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Quote:
Originally Posted by jr's3800
Is there a limit on how much you can shave off the heads before the intake has to be shaved?
Yep, that'* what I was kinda doubting in my dad.


-justin
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Old 12-28-2004, 03:01 PM   #48
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I have been told a number of times that an "L" head cannot be used on a "C" engine. Certainly you cannot put a "L" intake on a "C" head but what about the heads themselves ?

Am talking about the 91-94 "L" and not the later series II which I am told have different spacings. Has anyone ever produced a "mix and match" chart ? Certainly one of the limitations of the "C" is breathing and that was opened considerably on the "L".

And then there are cams (stock is ded).
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Old 12-28-2004, 03:54 PM   #49
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I'll get some when my mom comes home.

That is interesting about the head swap. Makes me all the more confident that the rockers will work .


-justin
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Old 12-28-2004, 04:05 PM   #50
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Here'* what i got so far for the swap:

Drill pedastals from .3 to .368
Buy dozen Flange head, Hardened, Zinc coate 3/8-16* 1 3/4 bolts

Seems pretty hard...
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