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RX-7 1st Gen Specific (1979-85) RX-7 1979-85 Discussion including performance modifications and technical support sections

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Old 08-17-2010, 11:49 AM   #1
Mateepay
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added power 12a??

im currently getting my 1st gen set up for auto cross trying to find moderate increase in horsee power any hints?????
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Old 08-17-2010, 12:03 PM   #2
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1. Exhaust
2. Intake
3. Ignition

Check the mods in my signature. They all contribute to getting me to 134 whp
which is >50% increase from stock. Exhaust is always a big win and then a
better carby setup is second. Anything after that is smaller but it all adds up
including weight reduction.

Of course it depends on what the class rules are for the autox your doing.
Some of these mods might bump you into higher classes. So you have to
weigh the mods with your goals.
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Old 08-17-2010, 12:42 PM   #3
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check the rules first. it doesn't make any sense modding yourself out of competition.
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Old 08-17-2010, 02:02 PM   #4
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I race in CSP, which allows you to remove emissions and add carb, exhaust, and suspension. Check my signature for the mods I run, then take a look at my videos to see the results. I have a very happy car.





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Old 08-19-2010, 10:04 PM   #5
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i would like to run my 83 in a competitave class ive ran in g stock against mr2 and miatas and didnt do to well any opinions on a good class for my car..... ? ive also already done a header back exhaust and i can feel a minor increase in hp
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Old 08-19-2010, 10:51 PM   #6
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I believe that if you've already changed the exhaust system, then you're already looking at CSP. A fully stock car would be in E stock.

A fb can be competetive in CSP, but you have to do a lot of work to get the car up to snuff. I eat Miatas on Hoosiers on a regular basis, even with cheap tires on my car. 90% of it is due to suspension setup.
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Old 08-21-2010, 09:44 PM   #7
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ya thats what i was assuming....... so instead of horsepower i should focus on my suspension?
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Old 08-22-2010, 08:56 AM   #8
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Also having a pretty bad housing leak above my exhaust I'm contemplating an engine rebuild would it be smarter to toss the 12a or restore it
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Old 08-24-2010, 02:22 PM   #9
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Describe the "housing leak" above the exhaust. What are you leaking? If it is coolant, then you should look at the orings between the intake manifold and the block.
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Old 08-25-2010, 10:11 PM   #10
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its an oil leak i believe it smokes really bad when getting off the highway i'm pretty sure its oil becouse it smells like oil assuming that any ideas ? still drives and gets great compression for 145000 miles
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Old 08-27-2010, 12:33 AM   #11
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If you are finding the oil around the exhaust system, then it is most likely coming from the oil metering pump. No need to throw your motor away man, just fix the little part on it that is causing the issue and you'll be all set.

The OMP is located on the front bottom passenger's side of the engine. It will have a rod the runs up to the carb, along with a couple of lines to carry the oil that is injected into the carb. A very common place for leakage.
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Old 08-27-2010, 09:58 PM   #12
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sweet do you know of a link for an oem or similar repplacement??
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Old 08-27-2010, 10:10 PM   #13
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could it be more than that if it also jas grease build up allong the front of the engine also a bit on the oil pan and front piece of metal under the fan......... help if i get pictures??
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Old 08-28-2010, 04:24 AM   #14
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That could just be years of buildup. I would start by giving the motor a very good cleaning. Get in there with a brush and some engine cleaner, make it sparkle. Then it will be much easier to determine where the leak is originating from. Besides, its always more fun working on a clean motor and engine bay.
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Old 08-29-2010, 10:52 PM   #15
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thanks that sounds like the right place to start thanks for the help will deffinetly get back to you wen i have the engine cleaned
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