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Old 12-23-2012, 12:45 PM   #1
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Default Reset ring gap before turbo?

Over the next few months I'll be installing a BEGI S4 set up on my '99. As the kit is currently winging it's way toward me from California I'm in the planning stages for the build.

After reading here about setting ring gaps for turbo applications, one question comes up about installing a turbo an otherwise stock engine.

I'm going to be pulling the motor to install a stage 2 clutch set. While it's on the stand I'll be dropping on a rebuilt head and gasket (current #3 plug hole is stripped). Should I just go ahead drop the pan and re-bearing/re-ring the bottom end while I'm at it. This would give me a chance to check/set ring gaps to for a turbo application. Worth the extra time? The bottom end work isn't budgeted this time around as I need to send Reverent some build money for an MS. However, since I'm in there....

Thanks in advance for any words of advice.
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Old 12-23-2012, 02:21 PM   #2
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Don't touch the block unless you have h-beams to install.

Stock motor = stay under 240wtrq. As long as compression is equal across the board, you don't have to touch a stock motor.
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Old 12-23-2012, 02:56 PM   #3
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yes get a new set of rings and gap for boost.

Due to the increased heat from boost you will have more more thermal expantion of the rings.

If the rings butt ends and flex you end up with busted ring lands on the pistons.
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Old 12-23-2012, 03:43 PM   #4
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If you pull apart the motor it would be insanely foolish not to hone/re-ring and of course throw some h-beams in there. All of that is fairly cheap and would make your engine not hate you later.
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Old 12-23-2012, 04:53 PM   #5
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Alright, thanks for the advice. H-beams ordered w/ARP bolts. Just means a few weeks of longer work hours...
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Old 12-23-2012, 05:28 PM   #6
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It's all worth it when you smoke that minivan.
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Old 12-23-2012, 06:05 PM   #7
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We tend to smoke something else in Colorado, but if you're into Minivans...hey, who am I to judge?
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Old 12-23-2012, 08:08 PM   #8
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get some goddamn pistons too.
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Old 12-23-2012, 09:07 PM   #9
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...And a sawzall for setting your end gap.
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Old 12-26-2012, 02:52 PM   #10
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Order bearings too. Reusing wear items is kludgy as hell.
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Old 12-26-2012, 03:10 PM   #11
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Kludge (n): a workaround, a quick-and-dirty solution, a clumsy, inelegant, difficult to extend, hard to maintain yet effective and quick solution to a problem.


"Kludgy" describes my wardrobe, not my wrenching.

Bearings, rings, seals, H. gasket, t.belt, h20 pump, oil pump, etc. will all be replaced with new. Head is rebuilt, match ported and mildly polished. etc. etc.
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Old 12-26-2012, 03:24 PM   #12
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If you are building the motor to that extent, get some pistons on that list.
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Old 12-26-2012, 03:52 PM   #13
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Unfortunately, unless I can find a used 99-00 MS2 to run this system rather than ordering a new Reverent unit, a piston upgrade will have to wait until either OEM piston failure or the next rebuild.

Though I've heard I don't need BOTH kidneys...hmmm...
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Old 12-26-2012, 04:19 PM   #14
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Hmm, alright. Id go for a budget rebuild in that case, but I'm also crazy.

I'd do OEM bearings, egay rods, stock pistons with fresh rings, a hone and slap it together on a budget. If you are having any machine work done you may as well go for the pistons.
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Old 12-26-2012, 06:44 PM   #15
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Ppppppp p pbp p.

PIZTONS YOU **** GOD DAMN U
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Old 12-26-2012, 06:47 PM   #16
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I rarely agree with , but you should try to spring for pistons if you're going that far.
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Old 12-26-2012, 07:54 PM   #17
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If you do the H beams and new pistons, you may as well get the whole rotating assembly balanced.


Damn snowball effect..........
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Old 12-26-2012, 08:05 PM   #18
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and billet gears....and a super damper...and
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Old 12-26-2012, 08:59 PM   #19
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and and and

A BORG WARNER S366
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Old 12-26-2012, 09:16 PM   #20
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i fell victim to their reasoning recently :-/.. except for the s366. gross.

it's no big deal it's only ~1000 for rods and pistons, 200 for arp bolts, 140 for bearings, 300 for oil pump, few more hundread for your gaskets, timing belt kit, etc... lol. enjoy the rabbit hole.

or just put it back in get a short block and have fun raggin on your motor.
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