Hey. I got my FD a while back, and now i'm looking for some extra power (the Racing Beat air inlet with K&N filter, and GReddy exhaust aren't enough, of course ). So i think i'm going to ditch my twins for a downright HUGE single turbo. I heard Trust has a nice one, and HKS, but i thought i would consult you guys before making a major purchase.
So do you think i should sell my twins short, or are they worth it? Or is a single turbo better? I'm looking for to get around 550 to 650rwhp (I know i will need more mods, but i want a turbo that can handle that much power), and i believe the twins can't handle that. If you have anything to say in defense to the twins, please do, but i heard single turbos are better. Thanks for your input.

Dave

 

Dood, 550-650? On a 2-rotor? Do some research at least for us, those are REALLY high numbers for a 13B..

 

550-650 rwhp 13B
Sounds just like a bridgeported engine running 20-24 psi.
DO IT!!!!

GReddy T78 is a good option - also one of the most popular choices.

 

I've read about a 550rwhp 13B RX-7, it was in Sport Compact Car issue in October 2002, titled "Driven to Learn." I do know my cars, and I know a 13B can handle 550rwhp.

 

On a streetported 13B (that is still streetable) your limit is about 550 rwhp, maybe slightly more.
You can bridgeport it, and then your streetable limit is about 725 rwhp.
After that there is no streetability since you need P-ports.
That is unless you step up to a 20B

To get 550 rwhp on a streetported 13B (no nitrous) you are probably going to need to run 26-32 psi of boost. I'm just estimating with that number though.

 

Oh boy, someone educated on magazines! I apologize, you must really know your cars if you read that magazine..

 

Actually Sport Compact Car is a pretty good magazine. It's one of the better import performance ones out there. It's definitely the best MAINSTREAM one. There are better underground ones like "Fast Fours and Rotaries" and "Grass Roots Motorsports" but SCC is one of the best mainstream ones. I like Modified Mag as well.

How can you knock someone for reading a magazine? Would he have been better off not reading it? It's good to read as much info as you can to learn stuff.

 

While it is possible to make 550 RWHP on the 13B, look around here and see how many people have done it. There aren't many. It will be expensive, and it probably won't last too long.

Most people who want to run pump gas shoot for 400-450 RWHP.

-Max

 

mjw-
why are you knocking on me for reading a magazine? You must think your hot stuff. I goto a tech school that specializes in rotary engines and I'm going to be a mechanic when I graduate. Maybe you think before ratten on someone.
maxcooper-
i realized 550rwhp is a touch too much, maybe i set my sights too high? I hope to get around 400rwhp AT LEAST. But you gotta admit, 550rwhp is damn cool!

 

550 is damn cool when the damn tires break loose at 85 miles an hour and you start sliding towards a car or a wall. Hks t51r kia should be what your looking for, or maybe one of the sr motorsports turbos. Now if your one those type that want to make full boost at 3k rpms(for what reason i dont know)then I would stay with twins. You know Bnr Supercars has some bad *** twins that will out power some singles on pump gas.

 

Many large singles such as the T51, T04E, RX6, etc get full boost (like 20psi) in the 3000-3500 rpm range.

 

The RX6 and T04E are not large singles, but they do get full boost pretty early.

I think you have your sights set too high, but it would be great if you gather enough info to make it happen. It is certainly possible -- it's just tricky and usually expensive. Get a huge turbo, monster fuel system, stand-alone engine management system, big port, big IC, race gas, and crank the boost. Tuning is very critical. You will break the engine if it goes lean -- don't skimp on the fuel system.

600 RWHP is even more cool, but that doesn't make it any more practical or attainable. I don't want to run race gas in my car all the time or break any more stuff than I already do, so I don't want 550 RWHP. The car hauls *** with 400, but I don't think there is any power level that you don't eventually get used to.

-Max

 

What are you talking about? You are mentioning a TO4E and a T51 in the same sentence as if they have similar spool/power characteristics.. they is no way a T51 will make 20psi by 3500rpm, I'd consider you lucky if you got 20psi from a TO4E by that rpm.

Maxcooper is right on here in explaining the practicality of a setup that would yield the power Dave is looking for. The problem is that Dave is citing a magazine as his point of research, I saw it in a magazine so it must be possible. Well anything is possible, it all depends on how deep your pockets are. It is important to understand that you can't just slap on a huge turbo, big fuel, and a standalone EMS.. you will be breaking things left and right on a stock chassis FD with that amount of power.

I am not trying to knock you Dave, and I don't think I am close to hot stuff. You seem to be very proud of your tech school education and that is great, I wish you the best. But if you must go through because 500rwhp is 'cool' then so be it. Godspeed to you.

 

no mjw, i want 500rwhp so i could give rotary engines around here a good name. In the midwest, where i live, rotary engines have never been apperciated, in fact, they are looked down upon. I want to settle the record and kill the kids up here in their V8-powered Camaro's. But i can't do that with a 13B running 255hp. You see, i need more power. It's not my fault you're ignorant or too poor to afford to do, so stop crying and cheer me on. I was really happy when i regiesterd to this forum; everyone (almost everyone) is nice and supoortive and open to new ideas, and almost everyone is educated. I was a member in a Honda/Acura forum where the topic of disscusion was mainly body kits and adding nitrous. The kids there had no idea how to do it or how it would adversly affect their engine. They didn't know what BOV, W/G, IC, EMS, or anything was. All they wanted to do was put nitrous on it. Then i came here and foud out people here were different; they are smart, open to ideas, and don't knock people for thinking different. MJW, it's people like you that make me want to trade in my FD for a relibalbe Civic. Why do you have to wreak something so good? If you think I'm an idot, be my guest, i really couldn't care less, just don't rape my forum where i am trying to get viable information from SMART people who actually have NICE input. I didn't post this hoping to get some1 to call me a moron and say I'm dumb. If you don't have anything helpful to say then stop saying saying anything. How hard is that to understand?
Bridgeport, Maxcooper, and 93redFD thanks for actually reading my post and then relaying me information. My FD thanx you too.

 

Looks like I'll have to bring out the "Rotary Collection" CD to scrounge up some dyno graphs
I'm sure I have a couple with those turbos.

-----

Ok, I found some dynos with those turbos, but none that also have the boost level listed along with the RPM, so that doesn't help. I did a bunch of searches on the forum for T51 equiped 13b's and here are some numbers which commonly appeared concerning what RPM full boost (15-20 psi) was reached at:
Streetported 13B: 3500-4500 rpm
Bridgeported 13B: 3000-4000 rpm
That's an average range. Some were a little quicker, and others were a little slower.
Didn't search for the T04E yet, if you want me to I can though.

 

well, i think you should take it one step at a time. go and get a pfc, upgrade you intercooler, dp, high flow cat, injectors, etc. then decide what turbo to get. i'd really like the bnr stage 3's, but i have to worry about smog. if smog is not a worry to you, and you want some big power, look into a-spec's twin coming out. or you could just go with a gt 35-40. that is just me .02

 

yea, smerkinseven, i saw the BNR stage 3's. they look real nice. I'm also thinking of getting a race engine from them as well. My current 13B has about 68K miles on it and may be in need of a rebuild, but it is running fine and making perfect boost, no problems. I was thinking i could get the BNR race engine, bridegport it and slap on a honk'en huge GReddy T-78 and upgrade to 1600 Bosch injectors and get the BNR intercooler. Of course then i would need to get a dp and pfc, i already have a GReddy cat-back exhaust. I also think i should a BNR or Racing Beat stage 3 or so clutch if i was using this much power, don't wana destroy the trany . I haven't heard about the a-spec twins coming out, do you have a link? thanx.
Dave

 

I found a nice single turbo kit from the RX-7 store.
It's the new A-Spec GT35/40 Xtreme turbo kit. It looks real nice, but so does the GReddy T88 kit. I found a ton of stuff on there that I'm going to save for. They even have a full front fascia '99 spec conversion! I want that, it looks pimp. But i found enough performance items to get me to my 550rwhp goal. they offer a turbo performance package that gives you 500rwhp and includes a slew of parts, i didn't wirte them all down.
Thanks for all your help
Dave

 

I would highly recommend the stage 3s. I rode in spoautos car(brn race engine and stage 3's) and it pulled harder than my car on pump gas. i have a greddy t-78. if I could go back, i would have gone with the twins. i love the single turbo conversion, but you have to look at "whats the most bang for the buck"

 

The GT35/40 is one of the best single upgrades for an RX-7 out there, but I don't think it can get you to 500 rwhp on pump gas (without nitrous).
For example, someone on here just made 460 rwhp @ 20psi with one, and that is pretty good numbers.

 

yeah Briddeported, i saw that too. I think 500rwhp is too high. I can get 98 octane, so i will run that, so i'm shooting for 460rwhp, that sounds awesome. I also saw an HKS T51-R turbo kit that looks nice. Which one is better, the GT35/40 or the HKS T51-R?
93redFD, where the twins there the bnr modified twins? I didn't know they made that much power and tug. I though a GReddy T-78 would for sure smoke them. Thanx for your help.

 

I also saw on the bnr website a half J-bride port race engine, 13B of course. What is the difference between the half j-bride port and a normal bridegport??

 

rx7turboracer, yes the twins where the modified twins(stage3s) and yes they are badass. I didnt expext them to be so brutal

 

550rwhp hard to come by ?, I hope not ................
I am almost done with my conversion and hope to be making those figures (while crossing my fingers , toes and eyes ), here is what I have put together.
Half bridged 13BREW , Hurley Racing 2pc 2mm seals, race clearanced (should be able to make 10000rpm), oiling mods , 10# cromolly flywheel with ACT extreme clutch and six puck disc, GARRET T70 , 3" intercooler piping , large NPR IC mounted in front , custom 2" tubular manifold with separate TIAL 35mm gates , TIAL BOV ,HALTECH E6K , Aeromotive A1000 pump , oversized lines , Paxton reg , 4 850cc and 2 1300 cc ijjectors , 2 MSD6A's with TII coils , Aquamist system 2D with their DDS2 (to allow high boost on 91 octane) and some other stuff I cant remember now.
I hope you have a better idea of what you need to get to make that Hp. I dont think a LARGE street port and some upgraded twins will do it though.
We finally got a dyno down here so Ill be sure to make some pulls and let you guys know.

 

A J-port is a large bridgeport. Basically something between a Birdgeport and a Monsterport. It cuts past the water seal... but not yet into the coolant jacket.

Here is a quick rough pic I drew up to explain.