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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 12-28-2004, 04:17 PM   #51
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Quote:
Originally Posted by jr's3800
Dr Jay and Justin... Would you happen to have pics of the intake side of you heads...?
Sho nuff:

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Old 12-28-2004, 05:07 PM   #52
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I see what you are talking about. Whatever that is.. mine doesn't have that. Just the other ones, with the glycol in 'em.


-justin
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Old 12-28-2004, 05:43 PM   #53
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My mom came home a little early.. so I took some pics..

Some engine pics --Don't mind the disorganized rods, I haven't had a chance to bring them in organized. They are in their proper order as-is, I promise.





One more for Straitor


Some head pics [rear head]





-justin
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Old 12-28-2004, 06:13 PM   #54
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Quote:
Originally Posted by jr's3800
Edit... Are those coolant ports?
I'm gonna step out on a limb here. Integrated PCV, started in '92.
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Old 12-28-2004, 06:50 PM   #55
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You're right. As far as port matching the exhaust has more to improve on than the intake. If you look very closely at my heads you can see a solid off color area just around the ports, then the impression of the gasket outside of that. If you look at Justins heads, he doesn't seem to have nearly as much to remove. It really looks like his gasket rides right along the edges of the port. I'm guessing he uses the same gasket as me, in that case you can possibly go a step further than simple port matching and get gains. If you look at the gasket its heavy plastic with a thin line of rubber-type material that goes around the port and other areas. That is the important stuff, the plastic is just a medium. Cut the plastic around the port so that the edge is within 1mm or so of the rubber line, then grind the head to match...hope that made sense.

If I was hard pressed to use '93 heads on that engine, as long as everythign else matches up you can fab a PCV. Drill a small hole in the valve cover, put a rubber grommet in it, get one of the older style pvc valves, attach a tube to it and plug the other end into the intake tube. Just make sure you drill on the upper side of the valve cover, so you're not just sucking up oil.
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Old 12-28-2004, 07:00 PM   #56
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My headers didn't have gaskets. I was thinking of porting them, also... but I am not sure how much I would like to, or how much would be safe. Although, I have the same lines on my heads, as you do doc.. I was thinking, maybe to grab some silly puddy, and checking the clearances, there are some poor welds on my headers, that I would like to clean up, however, it looks like I would go right through the welds, and lose the flange if I weren't careful. But, there is that flat spot on the heads, that seem to be a good start to round out.

jrs3800: Why do you say it wouldn't work?


-justin
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Old 12-28-2004, 08:26 PM   #57
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Just for super trivia, Buick introduced the "L" engine and "E" transmission in 1991. The Bonneville did not get the "L" until 1992 restyle. The intake on the "L" flows about 30% more than the "C" which is one of the limiting factors of the "C". Interestingly the stock air filter element on our '90 Bonneville which is barely enough for a "C" is also used on our '92 "L". A significantly larger filter is used on the SII perhaps because it is tuner for somewhat higher RPM peaks than the "C".

I suspect the cams are ded and the peaks are so low for the "C" because every one was built during the national 55 mph speed limit and seem to be optimised for a 50-60 mph cruise. (1400-1700 rpm).
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Old 12-28-2004, 10:14 PM   #58
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Damn.. it'd be cool to have an LN3/L27 hybrid.. although I want to see how much I can get out of what I have.. it'd be awesome if I could have 200/260 hp/tq.. with just the mods I have listed in my sig. Give something for others to shoot for, like me. I'd love to be close to the power of an SII N/A, or SI */C [stock]. But hey, 'nuff of my dreams..

Jrs3800: My cylinder doesn't have rust, that is oil sitting in the cylinder. There is rust on the lifter valleys. I am going to clean it up sometime this week.

Do you guys think I should port the exhaust too? Should I match the heads to the headers? Getting rid of that flat spot, and rounding it out? And cleaning up the welds?

My mom is good for some things, I guess. She gave me the recipe to make play-doh . I am going to have fun tonight playing with my play-doh. I feel like a kid again .


-justin
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Old 12-29-2004, 02:03 PM   #59
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Some play-doh proved that there is about 1/4" of material that I can remove from the exhaust ports. It is the exact same amount that I see in the pic of doc'* heads. Exhaust ports are on my list of things to port, too.


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Old 12-29-2004, 04:13 PM   #60
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But back at my original question, can you put "L" heads and intake onna "C" short block ?
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