Generic Turbo questions. Help appreciated

Old 04-07-2010, 10:54 PM
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Generic Turbo questions. Help appreciated

Hey guys. Im new to these forums and I have spent a good deal reading through threads about turbos. Learned a bunch but still have a few questions. Anyway I own a mazdaspeed 6 that is fully tuned / bolted (stock turbo / engine) at 310awhp / 347 tq. Its a great car but its not fast enough for me. Im going to be replacing it soon and I have a few options with the s2k being very tempting. Its not everyday you see a turbo s2000 and a lightweight rwd convertible . . . awesome.

My question is regarding money. My goal is 350-400whp. I don't want to touch the engine. What type of investment would I be looking at? The stage II greddy kit is 6K. An exhaust / tune would be another 1500. I don't track the car but it seems like the stock clutch would need to be replaced which would be another 1K. I know the rear diffs seem to be a problem but as I said I am not going to be launching much at all. Would it be safe to assume under 10 grand for "safe" 350-400whp? Seems like turbo's are pretty reliable on these platforms. I just don't want to end up with a car I continuously need to throw money at. I wan't something that can be done right and work for years down the road.

The other reasonable option is getting a used evo but everyone and their brother has one of those. However they are definitely easier to modify but the initial investment of the car itself will be significantly more than an s2000. Not to mention 350whp on a light s2k would feel like 400 in a heavy evo . . . right?

Last question is about the compression. Are most people running 300+whp on boost using stock compression? I read about a gasket that lowers the compression to 9:1 which seems much more reasonable for turbos. Like I said however I don't really wan't to touch the block. That would be another 1500+.


Thanks for your help !
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Old 04-08-2010, 06:16 AM
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u're safe @300 with the stock HG
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Old 04-08-2010, 07:30 AM
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Evo 8 2,910–3,109 lb
Evo X 3,131–3,527 lb

S2000 2,864 lb
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Old 04-08-2010, 10:08 AM
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Originally Posted by TheSoundMan21 View Post
Evo 8 2,9103,109 lb
Evo X 3,1313,527 lb

S2000 2,864 lb
Wow I just assumed the s2000 was light. Thats surprisingly heavy.
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Old 04-08-2010, 10:22 AM
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Originally Posted by coyfish View Post
Wow I just assumed the s2000 was light. Thats surprisingly heavy.
when mine was stock i weighed it with a full tank of gas, no spare and no tool kit and it was 2740lbs with the rear axle being 20lbs heavier than the front. the top was down however so that could have been why.

i've got coilovers and a lighter weight exhaust/test pipe now so i need to reweigh it.
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Old 04-08-2010, 10:23 AM
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also, hop on s2ki... i saw a new greddy kit going for like $3400... never installed...
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Old 04-08-2010, 04:39 PM
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Yeah I visited s2kforums and my threads didn't get much attention. From what I gather getting about 300whp is pretty easy with a bolt on turbo kit. But if you wan't more you need a new clutch and lower compression. Just trying to find a ballpark $$ figure for people running 350-400whp. At this point an evo seems like the more logical move. Its fun to have something you don't see everyday. Evo's and subies are all over the place which is kind of lame.
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Old 04-08-2010, 04:54 PM
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you could easily make 350-400 with 6,000 grand, and it would be a solid dd
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Old 04-08-2010, 04:58 PM
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inline pro's 3mm hg is your best bet for lower comp on stock internals, but i would definitely do out your whole valve train to handle high revs and boost, then spend rest of your money on turbo kit, suspension, tune, k-pro/ems.
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Old 04-08-2010, 05:53 PM
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6,000 grand,
for this much bread, I expect more.


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Old 04-09-2010, 11:16 PM
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Originally Posted by jagg View Post
for this much bread, I expect more.


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true but..
having a reliable DD that will make 400 easy is not bad considering all the other items needed to make a solid fast/fun rwd 4 cylinder, plus going brand name for about 95% of the parts going into the car. All i have ever used is well made brands, but waiting on deals is what kills me lol.
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