hawaiiangoat

I've been searching the threads and posts for information on swapping engines. I've even come across a jack *** who was wanting to do a b16a swap in his rex. (Burn baby burn)

None the less, I know that doing a swap can get fairly expensive. The reason for choosing the 20b or the 13b t.t. is because I want a car that stands out from the crowd. I also want to pull atleast 275hp at the wheels. Of course i'll need a hefty loan but it's worth the massive debt.

Question:
1). Will the tranny and rear end from a 1986 n/a rex be sufficient enough to withstand the increase in power that a 20b or 13b t.t puts out? ( had the tranny rebiult 1500miles ago)

2). If I had a budget of say $5000, can a rebuilt n/a, with the help of aftermarket parts, produce more than 275hp? (no nitrous)

3). Has anyone in the club swapped a 20b or 13b t.t into there 2nd gen?

Thanks for the time. Slater

My Rex
http://groups.msn.com/BABYBLUEREX/shoebox.msnw

adamlewis

1a) HELL NO!
1b) No.

2) Possibly...I dont know a whole lot about higher end NA stuff ... But a good bridge port and some exhaust will take you far

3a) Yes ... Its much more than $5000
3b) Im sure some people have done it but I havent really looked for it. Aaron just made his NA into a Turbo.

hawaiiangoat

I noticed Aaron doing a n/a to a turbo. Let's say I did swap my n/a for a turbo. Can the right parts and a sufficient budget allow me to reach 275hp? Say $6500?
Slater

rico05

No, the stock drivetrain is only good for like 230hp. Yes a 13B can make 275hp w/o n20, but it will do so at about 9000RPM, revv to 11000, and be so unstreetable, you would hate it. Not to mention, a full bridge port only lasts like 20k miles. Yes, go to the 20B section of this forum and ask around. Let's just say, the average for a STOCK 20B engine alone is about $3k-$4k after shipping. A full swap can cost upwards of $10k. If you want power, do a 13BT swap, or just sell your car and buy a TII. I am shooting for 230hp at the wheels in my N/A, but only with n20. I want a drifter, but an ocassiona; drag is nice as well.

Evil Aviator

OK, first of all, it is incredibly stupid to go into debt just to hotrod your car. If anything else, please listen to that advice.

Next, why 275hp?

No nitrous? Good call.

The NA transmission will work with 275hp if you just want to spin the tires. If the tires have traction, then the transmission will not last very long, but it will work for a while (hopefully).

The 20B-REW and 13B-REW are a real pain to install into an NA FC, and they are not cheap. Your best bang for your buck is to sell your car and buy a TII. That will give you an excellent base car to gradually modify to get to your performance objectives, and a S4 TII in running condition sells for as little as $2,000-3,500.

Rob500

I agree with Mr Aviator. Buy a TII car and modify that. It's a much easier and cheaper way to go.

Rob

hawaiiangoat

Reply: Why 275 hp?

Answer: The reason for picking around 275hp is that I want my rex to be stupid fast. I don't really want a car that just hums around. I realize that it will cost a lot of money but if you've seen pictures of my car, I've already sunk in a tremendous amount of money.

Question: If I did swap for a 13bt then would I need the 13bt tranny and rear end aswell? Is the n/a and t rear end the same?

Slater

Evil Aviator

Well, if you kept the 13BT completely stock and running at the stock power level, you would be able to keep the lighter NA drivetrain (less clutch). However, since you want to be "stupid fast", then it sounds like you are going to need the whole TII drivetrain. It has a strengthened "ribbed" transmission case (similar to the FD), larger diameter driveshaft and halfshafts, and a stronger differential.

rx7_ragtop

NO



NO

Quote:

3). Has anyone in the club swapped a 20b or 13b t.t into there 2nd gen?

Thanks for the time. Slater

Yes to both. It is NOT cheap or easy.

Quote:

Reply: Why 275 hp?

Answer: The reason for picking around 275hp is that I want my rex to be stupid fast. I don't really want a car that just hums around. I realize that it will cost a lot of money but if you've seen pictures of my car, I've already sunk in a tremendous amount of money.

275 RWHP is not "stupid fast." It's about "stock Mustang GT fast."

Quote:

Question: If I did swap for a 13bt then would I need the 13bt tranny and rear end aswell? Is the n/a and t rear end the same?

Slater

Yes, you would need the tranny and diff. NO, they are not the same.

Brad
88 Convertible
TII drivetrain. (engine coming soon)

Ziggy682

Hehe, B16A in an RX-7. What's the point? Maybe if he dropped the 7 off, and put a C in front it would make sense.

hawaiiangoat

Considering my rex has only 160hp, going to 275 hp would make my car stupid fast. It may only be as much as a stock mustang but my car is a lot lighter than a stock mustang.

So in the end is my best option the tII engine and drivetrain with some after market parts, and engine modifications?
If so, how much hp can a 13bt produce safely if I want it as a daily driver, not a drag strip car?

darkwaveboi

doing a TII swap is a lot more effort than you think. I was in the same boat thinking i'd take the cheap way out, but once you get into it, you realize there are things you WANT to buy b4 you do the swap.
ex.
SAFC
Boost Controller
Turbo Timer
FMIC (since turbo hoods are incredibly hard to find)
Custom piping
BOV (mmm...the sound )
lightweight flywheel
Finding the N370 ECU for cheap.

+ the fact that you have to buy at least 75% of the things you want for the swap w/ cash because people on this and around wont sell you things that you can pay with with a credit card.

In the end...yes, i'll spend more money to get my car to be a TII, but it'll also give me the satisfaction of building my car. Just think about it.

TurboHead

Buy the nice TII, go ahead, you can do it! Then port the hell out of it, mod it till you puke, and have even more fun with the money you saved! Besides, you want something that stands out? Hell, the RX-7 alone "stands out" just because it IS an RX-7! Oh..but wax it to

RETed

oh
boy


-Ted

hawaiiangoat

Ted, I need some help. How about a little advice?

RETed

You're already got some replies, but I'll drop my answer here...

Not reliably...&nbsp The 20B will be making close to 300lb-ft of torque, and I put money this will destroy the NA drivetrain.


No, not on an NA motor without getting into stupid port extremes.&nbsp You could come very close with a bridgeport NA engine though - we're talking in the 250bhp at the flywheel range.&nbsp I don't know if you're talking about bhp or rwhp numbers.

There are several 13B-REW ones running around.&nbsp As for a 20B, I don't think there are many that are running very reliably at this point.&nbsp Check out the 20B section in this forum for more info.

I'm my book, a 13B-REW swap is a $10,000 job.&nbsp A 20B swap is at least a $15,000 job, and it's more edging towards $20,000.


-Ted

Aaron Cake

iTrader: (1)

No way. The 20B would rip that drivetrain apart...The NA drivetrain is not as strong as the TII drivetrain. Also, sticking the 13B REW in is a major PITA...If you are going to put a different 13B in, swap in the Cosmo engine.

Probably, but good luck keeping it streetable. We're talking peripheral port, Haltec, wickedly loud exhaust, etc.

Yep. Try checking the 20B forum.