I want the extra power of the later turbo - '89-91
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you can do lots of **** to make up for it.
The biggest is Higher Compression
Second Lighter Rotors
89 turbo
89 exhuast manifold
89 intercooler
thats about it
but essentially a s4(88) motor can be made w/ more overall HP b/c of the lower compression. when i converted my gxl to a J-spec, Haltech, etc etc crazy *** turbo II guess which motor i picked. oh yes as rebuilds/j-specs they are generally cheaper too. my $.02
jason
The biggest is Higher Compression
Second Lighter Rotors
89 turbo
89 exhuast manifold
89 intercooler
thats about it
but essentially a s4(88) motor can be made w/ more overall HP b/c of the lower compression. when i converted my gxl to a J-spec, Haltech, etc etc crazy *** turbo II guess which motor i picked. oh yes as rebuilds/j-specs they are generally cheaper too. my $.02
jason
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For exhaust I think use 2.5" stainless tubing from the back of the converters to the bumper, with an X-pipe in the middle to equalize pressure. As for intake, I don't want a k&n does anybody make foam filters for RX? Also, intake, I want a cold-air unit like stock.
Also, where can I get the "MAZDA" decal on the airbox? I really want one.
Also, where can I get the "MAZDA" decal on the airbox? I really want one.
#7
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foam filters suck, they don't filter. x pipe?? you mean Y? there is no need to equal pressure, it's still only basicly a single exhaust, you don't have a v8.... get a down pipe and high flow cat, you power will go way up. you could just get a drop in k&n to keep the stock cold air, other wise your have to build your own.
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#9
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Originally posted by SIX TWO SLEEPER
well, my tII has a dual exhaust.
a K&N doesn't filter very well, does flow tho.
well, my tII has a dual exhaust.
a K&N doesn't filter very well, does flow tho.
Get an APEXI filter, I saw an independent study on them and they filtered the best out of any filter they tested...plus they happened to flow the best too.
#11
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it won't do anything but make more noise, if you want power you need to get rid of the cats, buy a down pipe and mid pipe. the bonez from www.rx7.com are good. anything bigger then that and you will need fuel mods. you probably will anyways though.
#15
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Originally posted by Node
*cough* PORT IT!
*cough* PORT IT!
#16
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isn't the hole plastic?? can't flare that... the 89-91 is metal but it's super thin.
I think the hole size is the same but it gets biger as it gets to the IC.
I think the hole size is the same but it gets biger as it gets to the IC.
#17
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oh well, get a FMIC lol
but anyways don't just try to get a 89esque motor, just upgrade it to as powerful as you want, one thing that helps a little bit and will be an upgrade you can use all the way is removing the belt driven fan with an electric fan you bought or got in a junkyard.
Go to a junkyard and get a big one, there was a thread about this maybe a week or two ago, try searching for it. Only frees up maybe 2hp or so but its still more power. Some people say they can feel it.
but anyways don't just try to get a 89esque motor, just upgrade it to as powerful as you want, one thing that helps a little bit and will be an upgrade you can use all the way is removing the belt driven fan with an electric fan you bought or got in a junkyard.
Go to a junkyard and get a big one, there was a thread about this maybe a week or two ago, try searching for it. Only frees up maybe 2hp or so but its still more power. Some people say they can feel it.
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