speedracer906

So here is the deal.
I drive a 93-94 RX-7, now only in hill climbs. (not long ago, rally) The car did great on rally but the up hill nature in hill climbs and my stiff competition make me look at the conversion to a 13BT. I could ask for all the latest links to this site or that, but I’ve been searching for two days straight and feel that I have not found yet or will never find the answers I’m looking for. (how can I do this cost effectively?)
Well yes, cost effectively but even more what can I do to maximize my Time, Effort and Dollar. (TED) he he. I would like to purchase a JDM 13BT and install it and start woopin A, but I feel that in the end I’m going to wanted to have done something or another, pre install to have maximized the effort.

Q1: Should I bother cracking it open and oh lets say replace the seals and putt a fresh lap to the surfaces?

I will defiantly increase the hp numbers by taking off the extra bits that cause drag. I.e. emissions stuff, AC, fan etc. The next step would be to consider turbo upgrades injector size, and … what? I’m not thinking an engine management system will be in my shopping cart unless I find a real good deal on one, so more fuel than the stock ECU can handle would not be a wise move. In any case I’m sure that a slightly better if not bigger turbo could do me some good, more emphasis on better. so …

Q2: what am I limited to on the externals of the mighty 13BT?
Q2a: is there an option of a piggy back module for the stock ECU?
Q2b: more in the fuel side of things, can a better turbo, injectors, intercooler and waist gate etc help out and how much? (seat of the pants responses are fine)

My 13B with a Yaw carb and improved intake with a special grind on the rotor puts out a healthy boost of hp over the stock 13B. I would guess at a 20hp increase in power. So that is conservatively a 150hp motor give or take. All I can say is that it pulls at 3500 and flattens out around 9000 giving me a reasonable exponential yanking down the road. It’s really a great ride. But my thirst for blood is there and that yank is no longer enough. I need more and I need it now! (insert evil laugh here) I can’t afford a 13BTT nor do I want to go down that path. Too much hassle and I’m trying to stay in the realm of reliable. I will close with my last question of…

Q3: What kind of gains will I feel/get if I install a 13BT over a massaged 13B and will it be enough to make me work, in order to get that back up on the wheel feeling?

Thank you in advance.

Pics on photo bucket: http://s733.photobucket.com/albums/w...06/RX7%20Pics/

diabolical1

iTrader: (3)

welcome to the board.

clarify this, please. not that it matters, it's obviously not a Gen III. i will assume it's an SE since you referred to fuel injection and a computer later on in your post.

only if you want to freshen the motor OR if you decide to turbocharge it. if you end up swapping for a 13B-T you'll have other issues and things to spend - how'd you put it? - T.E.D. on. you'd be best served rebuilding the engine when you get it because unless it was rebuilt just before you receive it, you simply don't know how much life is left in it and it makes no sense blowing it up and having to replace hard parts that you may not have had to replace if you had just rebuilt it before using it.

externally, you'd be limited by exhaust, turbo and fuel supply if you decide to go for BIG power. your setup needs to be upgraded as a system, so with the possible exception of fuel (depending on the turbo and amount of boost you plan to run) they ALL need to be upgraded together. i would imagine that doing off-road racing sets a definitive limit to the power you can run since traction is an issue, but you can sort through the details. you also appear to have weight on your side, so stock-ish power may be just fine. i don't know.

there are piggybacks available, but i wouldn't bother with a piggyback. just use a standalone EMS.

the simple answer would be torque. the turbo (stock or properly-sized aftermarket) will give you a flatter torque curve. don't know what "the wheel feeling" is, but i think you'll be very happy with the change.

speedracer906

Thanks, diabolical1

Well I brain farted on the year of my car. I have an .....84 GSL body. See Avatar. The engine in it is the 13B. That said, the conversion would have all the usual Gen1 to Gen II or III mods needed.
I've noticed the JDM engine milages are either in the 25-40,000 miles worn or 40 - 60,000 . The 25-40,000 worn engines I would think, should be good for some hard abuse. (?) There is some gamble in running these engines hard but it's the same for any engine really. (?)
So the Plan again is to replace my 13B with a 13BT. If no work is done internally, and I look to the external mods the areas of modification would be ECU, injectors and turbo all as a package. I could change just the ECU but why. I could/should(?) change the turbo, i would'nt change the injectors alone unless I have A and B done first. These mods are a factor in answering the final ultimate question. And of course exhaust, intake etc. are apart of any build, especialy this one. Biggish power is my goal. I can "get up on the wheel" on my car now and look forward to making myself work to control any new power. (The term "up on the wheel" to me is the ability to really work, control and feaverishly thrash the car around....effectivly. It's a state of mind as you command the vehicle.)

So will the 13BT coversion make me happy enough. 210hp is good but I want/need to stomp some A. Will the coversion make me say wow or will it make me say WOW...nice! Or to get the later responce, do I NEED to do all the external mods that make sence to get the WOW factor. For referance I'm thinking the TT conversion would make me say WOW I think I shxx my pants. I only need the WOW...nice! responce. I think a recent convert could only really answer this.


By the way, why am i an exhaust leak? (under Avatar) oops I wet myself again. (is that it?) Note to self, act more my age.

farberio

iTrader: (7)

JDM Motors have been sitting around doing nothing for a long time before they get to your door. Seals will dry out and its easy to blow coolant/oil seals within a relatively short amount of time. Also, some motors have cracked apex seals when they come in. Some people preach rebuilding JDM motors just for safety, some run them without problems. Its up to you.

My buddy has 170whp in his FB and its wow, this is fast. 210 will probably be wow this is really fast. 250 with a different turbo will give you omg its fast, plus the ability to get more power later on.

As far as getting to 250...I am not much of a turbo guy so you will have to do your research.

speedracer906

Im actually thinking of getting the video on rebuilding a rotory and the how to modify the rotory too. Then i can totally screw up a $1600.00 investment ALL by myself.
I should really plan on rebuilding the engine and doing all the popular mods. Or at least install new gaskets and such. weather I rebuild (seals and...) this project myself is another thread. I do have a stocker 12A for a test build though.
I like 170whp but ya it's only wow. I really want WOW...poop.

Thanks, farberio

Anyothers?

diabolical1

iTrader: (3)

i think a fairly stock (mildly modified) setup will make you plenty happy. besides, you'll have to learn how to do what you do with the new power anyway. no sense going crazy right out the gate. after you get the motor running well, modest upgrades are not that big of a deal.

i'd stick with doing the -T swap especially if you're not planning to go standalone because i'd imagine doing the same stock swap with an -REW would be notably more difficult.

dvs71990

Durango, CO Great places, know a lot of people at Fort Lewis.