2nd Generation Specific 1986-1992 Discussion

What To Do For More Horsepower?

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Old 10-22-2003, 07:36 PM
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Originally Posted by UniqueTII' date='Oct 22 2003, 01:09 PM
Weight redux won't get him any closer to his goal.
I am thinking in the 1/4 mile frame of mind...Good point.



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Old 10-22-2003, 08:07 PM
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Doing it NA will be noisy and without nitrous you'll be very non stock and will not be passing emissions without some major changes for the test.
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Old 10-22-2003, 08:15 PM
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go the old fashioned way. Intake, carb, lightweight flywheel, clutch, dual exhaust. Not sure what this setup runs on a dyno(don't really care), buts its fun to drive and easy to maintain! Good luck.



Now everyone can start carb bashing!
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Old 10-23-2003, 09:33 PM
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These are some other things that I have thought about doing: Sending out the chip when I get the engine back, getting a header, doing a cold air intake system, getting rid of the air pump, lightweight flywheel, and a better clutch. Any gusses on what I will have for power? Anyone ever done these things before?
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Old 10-24-2003, 04:03 PM
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Now that the engine will be taken apart, you have the opportunity to gain 60% more power than stock through extend (street) porting and exhaust (header mainly).



Just extend porting my engine and dumping 200 pounds of weight turned my 87 into a decently quick machine, where it was just kind of peppy before. Ported engines take really well to adding exhaust mods, starting with a header (the most important part).
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Old 10-24-2003, 04:35 PM
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Originally Posted by 88IntegraLS' date='Oct 24 2003, 09:03 PM
Now that the engine will be taken apart, you have the opportunity to gain 60% more power than stock through extend (street) porting and exhaust (header mainly).



Just extend porting my engine and dumping 200 pounds of weight turned my 87 into a decently quick machine, where it was just kind of peppy before. Ported engines take really well to adding exhaust mods, starting with a header (the most important part).
any performance numbers for your car after the porting?
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Old 10-24-2003, 06:34 PM
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But I thought that you could not street port a RX-7 with the 5th and 6th intake ports, or atleast that was what I was told. How did you get 60% more power out of you engine, just doing the exhaust porting, or the intake and exhaust porting? And if you could tell me exactly what you did with your engine I would greatly appreciate it!
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Old 10-24-2003, 06:57 PM
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Here is proof that you can street port a six port engine: Mazdaspeed7 has more proof in the forum "rotary engine building and porting"
Attached Thumbnails What To Do For More Horsepower?-port25.jpg  
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Old 10-24-2003, 07:01 PM
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after
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Old 10-24-2003, 07:08 PM
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Originally Posted by pengaru' date='Oct 24 2003, 01:35 PM
[quote name='88IntegraLS' date='Oct 24 2003, 09:03 PM'] Now that the engine will be taken apart, you have the opportunity to gain 60% more power than stock through extend (street) porting and exhaust (header mainly).



Just extend porting my engine and dumping 200 pounds of weight turned my 87 into a decently quick machine, where it was just kind of peppy before. Ported engines take really well to adding exhaust mods, starting with a header (the most important part).
any performance numbers for your car after the porting? [/quote]

Only the butt dyno.
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