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Old 04-26-2008, 09:25 PM   #1 (permalink)
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Default Turbo build questions (D16z6)

Whats the thickest head gasket to run with out having to worry bout blowing out. Ive got arp studs. Also any recomendations on which clutch to run on a 300-350hp Z6/gt28? Sorry, one more, i did the calc. for injectors and came up with 550cc, but ive been told 550,650, even 750cc from people. Can I get a solid answer to that. Thanks!
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Old 04-26-2008, 10:38 PM   #2 (permalink)
 
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Do like I did and just go to the RC injectors website. They let you know an estimate on what each is good for. You can also look on xenocron.com and they'll give you horsepower rating for each size. I just went on the overkill side and went with 750cc RC injectors.
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Old 04-26-2008, 11:18 PM   #3 (permalink)
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Why do you want to run a thicker HG?
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Old 04-27-2008, 09:24 AM   #4 (permalink)
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Why do you want to run a thicker HG?
Im running a ported y8 head on my z6, with the srp turbo pistons it gives me approximatly 9.5-1cr with the head/block combo(according to the zealautowerks comp calc.). Trying to keep it as low as possible, thats all. Im gonna go with the 650's. Thanks.
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Old 04-27-2008, 10:35 AM   #5 (permalink)
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clutches go off torque not horsepower, both LSD and ACT make good clutches for street and strip use. for 350 hp i would go with 750s, not that 650s wont support 350, but with 750s you have room to grow.
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Old 04-27-2008, 02:13 PM   #6 (permalink)
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Im running a ported y8 head on my z6, with the srp turbo pistons it gives me approximatly 9.5-1cr with the head/block combo(according to the zealautowerks comp calc.). Trying to keep it as low as possible, thats all. Im gonna go with the 650's. Thanks.
9.5:1 is perfect for boost IMO.
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Old 04-28-2008, 01:56 AM   #7 (permalink)
 
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I have 550cc tuner toys and targeting 300-350whp. I am using ACT Xtreme Clutch with street disk. Do not use the pucks. It is hard to shift if it is your daily driver.
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Old 04-28-2008, 02:12 AM   #8 (permalink)
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[QUOTE=kmanpete;1211216 . Do not use the pucks. It is hard to shift if it is your daily driver.[/QUOTE]

this is not true. it differers for everyone, you may just not have any calf muscles :haha:. ok but really. i drive a six puck sprung hub f1 stage 3. (ok not the best) but it doesnt make things hard to shift. dd my prob is clutch engagement and the fact i have a 7lb flywheel.
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Old 04-28-2008, 04:23 AM   #9 (permalink)
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this is not true. it differers for everyone, you may just not have any calf muscles :haha:. ok but really. i drive a six puck sprung hub f1 stage 3. (ok not the best) but it doesnt make things hard to shift. dd my prob is clutch engagement and the fact i have a 7lb flywheel.
well i had almost the same thing an it was pretty unconfy the first couple of weeks then i just got just to it .. :sadface:
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Old 04-28-2008, 02:55 PM   #10 (permalink)
 
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9.5:1 is perfect for boost IMO.
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Old 04-28-2008, 04:31 PM   #11 (permalink)
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You can get up to .XXX HG from Cometic. They will make a whatever you want. It's all the same three layers. Just the middle is thicker.
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Old 05-09-2008, 10:18 AM   #12 (permalink)
 
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I'm interested in the original question the poster was asking. I have the srp 10.5:1 pistons. They don't actually yield 10.5:1, accordind to c-speedracing's compression calculator... Nonetheless, it looks like I'll need a 0.065" HG to get me to 9.5:1 cr. I know cometic makes it, and I can get it at tunertoys.com, but is that thick of a HG safe on a boosted (10-12psi) D16y8?
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Old 05-10-2008, 06:53 PM   #13 (permalink)
 
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Turns out I might actually need a bit thicker than 0.065" to get my compression where I want it to be... Now I'm thinking I might just go with the 0.074" hg, also made by cometic. Has ANYONE on this site EVER had ANY experience with thicker head gaskets on a boosted D16y8, or ANY motor? I've been trying to get an answer on this for too long...
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Old 10-01-2008, 01:08 PM   #14 (permalink)
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WHat thickness is realistic on these with say 10-15 psi or 15-20 psi? I(we) dont want to worry about headgasket blowouts. Im using Arps also. Im sure that helps some.
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Old 10-01-2008, 03:17 PM   #15 (permalink)
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With a 9.5 compression, I'd not worry about the HG but worry more about the tune...which in turn blows more HGs than anything.

To the other guy commenting about using a thick HG, good luck cuz that's most likely uncharted territory by most.
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Old 10-01-2008, 04:27 PM   #16 (permalink)
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With a 9.5 compression, I'd not worry about the HG but worry more about the tune...which in turn blows more HGs than anything.

To the other guy commenting about using a thick HG, good luck cuz that's most likely uncharted territory by most.
Im gonna get the tune. Dont know by who tho, long ways away yet. Im just looking for some more info on the subject before I buy the parts.
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