Im planning out my mod list to do over this winter ( while the car cannot be driven anyway, I have a good few months to tear into it), and some sort of turbo upgrade will be done. Being that Im not after huge power ( 375 ish RWHP would make me plenty happy), I was originally planning on the BNR stage3 twins. However I cant even describe how much Id love to yank all of the **** out of my engine bay that is associated with them. I will need to still pass emissions, so I am looking at the A-spec GT35R kit, which will clear the airpump. Also I see that they will now be available with a divided housing, which is even more of a plus. I know alot of you guy are like me, and prefer a fast spooling turbo system to that of a laggy single, but with the new GT series turbo kits , I would think they should spool just about as fast as stock. My car is a street car, I dont race ( occasional trips to the drag strip or road course). Do you think the 35R kit would be a good choice for me?

 

as long as you dont mind the lag it produces. its more of a highway turbo like mines. if your going for only that much you can do that with an rx6 around 15psi on a stock ported motor.

 

May I ask what turbo you are running? The 35R should be one of the quickest spooling singles, its not that large, is BB, and when mated up to the SS tubular manifold and a divided housing, I really cant see it being laggy.

 

my bad im thinking about the GT42R. ive seen 381 at 16psi from apneablue but hes gotten better numbers now. You should talk to him about the turbo cause he will let you know more than i do. But I do know the 35 is both water & oil cooled. but you cant beat the fast response on the 35R even pushing just half way the car builds boost & speed as you are on full throttle. the perfect for a street car. BTW i have a t78 and that doesnt spool till about 4000rpm. so im more of a highway FD than the 35. Youll love it pluss you wont worry about breaking drivetrain parts like me . http://dyno.zeroglabs.com/graph.php?...1&SUBMIT=GRAPH on this webpage the blue is the 35R just to show you the power band it has

however if you dont mind the lag on a street a bigger turbo might help on the road course (dont forget on the road course your always at a high rpm so boost isnt a problem) Hope it helped
-J

 

Take a look at the turboxs to4e kit. Nicely priced, cast manifold, and spool time isn't far removed from sequential twins or a stock FC. It should clear the airpump as well. It's an awesome street turbo and is capable of the power you're after. I've one on my car. I feel, with more tuning, it's capable of 400+.

 

My only regret is that I didn't do it sooner .

 

my only regret is that i didnt go bigger....

 

I've got a T04S and I love it. It has very little lag and a good top end for a street car (just over 400 rwhp at 15 psi). My buddy with a modded C5 (400 rwhp and 400 rwtq) raced me from 40, 60, and about 90, and couldn't even get a jump on me at the "go" time.

Do it! Just be sure you set your HP goals at a realistic level and build for that from the start.

 

MY ONLY REGRETS IS that i should have gotten all the stuff at once so i can boost the MF

 

i have a TD06 i'm at full boost at 4000 RPM, running low boost at 12 lbs. high boost is not yet dialed in.............................you will love single turbo

 

If you build your own kit like I did.....over build everything. If everyone is saying a 40mm wastegate will work, run a 50mm. If someone says run 4 850cc injectors, run 2 850s and 2, 1200cc injectors. If you're want to get a two row FM IC, run a 3 row. Yes, it will cost more, but when you decide you want more power, the car will be built for it. Trust me....its not a matter of "if" you'll want more, but "when".

CJ

 

I loved my non-seq stock turbos, but after installing the A-Spec GT35R kit, WOW!
Now about low end power running 15psi boost: non-seq at 3500 rpm = 200rwhp,
GT35R at 3500 rpm = 230rwhp. This is with stock ports.

 

yeah i have regrets...... not doing it soon enuf. buying and rebuilding stock twins was a waste of time and money. oh yeah i also regret putting the beat down on most cars those v8s are innocent. kevin

 

My T66 is really not that laggy. You just have to learn how to drive the car. I'm planning on going a bit bigger when I upgrade.

 

No regrets what so ever. I have A-Spec's GT35R kit on a street ported engine. I had 15psi with the T3 footprint by 3300 rpm or so. We'll see what the T4 35R does in a few days.

 

I do have regrets going single only because I have yet to get it tuned above 12lbs. Hopefully this will change next week. With stock turbos, I was running 12.0 in 1/4 mile which was very impressive. Now, I am expected to hit 10's and cannot.

 

I wish I had opted to go V8 instead of a large single setup, or, buy someone's near complete 2-rotor/single turbo or 3-rotor and then mod from there.

Looking back the single setups were a blast, fast as hell, cool as hell, costly as hell, but now that I'm going V8 anyway I wish I had opted for that route up front. Roughly the same cost as a high hp single setup if the car is near stock to start with (very debatable ...). The V8 is a massive project but it results in a bulletproof setup that can pass tailpipe testing if done right, I plan to finish up in a few months and I'll confirm the 400+ rwhp and smog legal combo ... perhaps another 100hp with some spray as the LS1s love laughing gas. Oh, and a tough 6-speed to replace our gimpy Rx7 5-speed, I ate two fifth gear syncros over 50k miles on the 7's tranny.

Just one man's perspective.

Note to the rotary gods ... I still daydream (almost daily) about putting together another high hp turbo rotary so no I have not given up on what is still my favorite motor. It is such a challenge to set up a big single right with a solid car, motor, fuel and ignition systems, and then to tune it yourself for awesome driveability and decent power plus reliability is such a high! Just waiting for the day I have the funds and time to do another project 7.

 

I have many of the same feelings. I WILL do a V8 FD someday; however, I've decided to keep my current MB FD rotary-powered. After law school, I'll be on the look out for a Base model (with those cool base seats) that I can throw an LS7 into. Mmm...Aluminum 427, dry sump, probably make 430 whp bone stock on pump gas. Throw a mild cam in there, a free flowing exhaust and spray a 100 shot and you'll have 600 whp in a 2800 lb car.

 

Only regret was not doing it sooner!!!!

X...

 

May be you should check this out , https://www.rx7club.com/single-turbo-rx-7s-23/twin-gt28r-turbo-kit-pics-387757/

 

Thanks guys. Honestly, I am on the fence between the single upgrade, or a LSx swap. Right now my FD is about stock, and the costs about equal each other out once you count in everything I would need for the single upgrade. Turbo kit, larger IC, PFC, fuel system, tuning, etc.. I dont want to start an arguement about it, but Im thinking the LSx swap may give me alot more enjoyment, with alot less headaches. I just dont know if I could stand popping the hood and seeing a V8 instead of a nice shiney UIM with a huge snail on the side

 

IMO, if you are serious about either avenue I would suggest driving someone elses car (good luck) with the setups you are contemplating. You can read this stuff until you are blue in the face and it won't do as much as a test drive. It is very similar to the argument between sequential and non-sequential setups. Other people's perspectives on things may differ greatly than yours (e.g., turbo lag).

R

 

Yea, I know thats what I need to do. I did drive a '03 Z06 the other day, I know its not quite the same as a FD with that engine, but it still gave me a good perspective of what I would have to work with. Though I dont think anyone with a 400whp FD is just going to throw me he keys and say have fun...

 

If you are on the fence then I would suggest the V8. It's a big job though but Hinson can do it for you for around $13k.