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Old 04-22-2008, 05:03 PM   #1
Indo240SX
 
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Help: Top mount manifold?

I've got a 97 240sx with a red top motor. My turbo is on it's way out and was thinking of goin to a t3/t4. What's the advantage of a top mount turbo manifold? I'm hoping to build up to 300whp and I was also wondering what would be a good size of fuel injectors to go with. I've read 720cc but my friend says to get 550cc. Any help would be great. Thanks.
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Old 04-22-2008, 05:46 PM   #2
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what turbo do you have on there now?...T28, 550 injectors, and a 550 ecu flash will get you close to 300whp
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Old 04-22-2008, 06:45 PM   #3
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Uh, ya...about that. I've just got the stock turbo (T25 I suppose) with a FMIC and manual boost controller. It's still running ok but it's starting to smoke a good bit. Everything was done to the car before I got it. I've got a T3/T4 turbo lined up for that car and of course I'm going to get cams, injectors, fuel pump and reprogrammed and all that. At this point I need to get an exhaust manifold and I was wondering why some are mounted on top...what's the advantage?
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Old 04-22-2008, 07:41 PM   #4
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If you are going to use a T3/T4 you will need to high mount that turbo. Just have to make sure they are good quality lot of those ebay shit cracks after 2 weeks. Also you will have to remove your ABS unit if you have one installed. Its on the way of the dump pipe.
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Old 04-23-2008, 09:38 AM   #5
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So, the top mount is just to make more room for bigger turbos?
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Old 04-24-2008, 09:08 PM   #6
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In essence yes...Also design can enhance spool up times as well...Go for it man i love my setup! throw a nice gt series and you will be golden
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Old 04-26-2008, 11:13 AM   #7
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If 300whp is all your shooting for, forget going top mount and T3/4 turbo. That can be had just staying bottom mount. Get a GT2871R, 740cc injectors, Zmaf, rom tune and call it quits.
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Old 04-30-2008, 12:09 AM   #8
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Well, I'm starting to see the potential of this car. I've decided the I can get quite a bit more than 300hp easily. I'm going to go ahead and get 850cc injectors and I've got a top mount setup on it's way and my friend knows a place in Atlanta to dyno tune my ecu. He did my friend's 700+hp turbo lexus IS.
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Old 04-30-2008, 05:55 AM   #9
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there are places in tn that can do it too,
ga is a good ways to drive for a tune
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Old 05-01-2008, 12:18 AM   #10
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Well I'm midway between Atlanta and Nashville. Not really interested in having it done locally in Chattanooga. So either way will be about the same.....actually nashville is a bit further.
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