TRWeiss1

iTrader: (20)

Hey everyone, I'm looking to go with a single turbo with minimal lag over the winter, and I'm wondering about the GT35R. Firstly, does anyone have any experience with this kit from rx7store.net? http://www.rx7store.net/product_p/gt35r%20kit.htm

Secondly, I'm confident this turbo can reliably get me to 430-450 RWHP @ 16-18 psi. Would this assumption be correct?

Third, I know that I *should* get a FMIC for this setup, but would it be possible (for now) to stay with my XS Power SMIC?

As far as other mods go, I believe I should be ok...My motor has a moderate street port, full exhaust, PFC, Fluidyne radiator, Aeromotive AFPR, 850 primaries, 1600 secondaries, Walbro 255 pump, HKS twin power, ACT Streetlite FW, etc, etc. I'm hoping this turbo will boost 16 psi or so by 3800 RPMS. Does that sound reasonable?

So to summarize, will this turbo reliably get me to 430-450 RWHP, can I keep my XS Power SMIC (for now), and is anyone running the kit from rx7store? (If not, what is a good recommended kit, or did you end up piecing yours together?)

Any help would be much appreciated! Sorry for all the n00b single turbo questions, but I'm just trying to cover my bases (and I've never gone from twins to single before). Thanks!

Oh yes, one more question...Right now I've got the ACT Street/strip clutch, and I doubt it's going to be enough to hold the kind of power I'm looking for. What clutch would you guys recommend to hold 500 RWHP? (Purposely overbuilding it, would probably not go that high)

TRWeiss1

iTrader: (20)

Seriously? 39 views and no one has any input?

ihavetwins

iTrader: (5)

what do you have done to your motor ?

PandazRx-7

iTrader: (18)

I have no experience with the RX-7store kit, but with my A-spec 500R kit I see 1 bar somewhere around 3,500 rpm...

My Act street/strip clutch (which had atleast 10k miles with my twins) holds power just fine with my single now. Overboosting to 21-22psi one very cool night it still didn't slip.

All your supporting mods look pretty good... I think the intercooler should be fine as well.

As for power, I think you should definitly get over the 400 mark... but that also depends on the engine and port work.

TRWeiss1

iTrader: (20)

Thanks for the replies guys. The reason I don't think my clutch will hold up is because it slips *slightly* now when it's really warm on the 2-3 shift, if I'm really shifting hard (and I'm at 380 RWHP).

In any case, onto the motor...It has a moderate street port by Dave @ KDR (also tuned by Dave), 2 mm Atkins Apex seals, new rotor housings, relatively new irons, new e-shaft, and new main bearings. This motor has about 7k miles on it, and pulls about 415-425mmHg vacuum at idle while warm. It is a very good running motor, with the exception of oil consumption right now (coming from the stock twins...I'm pushing them to 15 psi and the seals are beginning to go). The motor also has new oil control rings. Other than that, the previous owner had it rebuilt 15k miles before I got it. However, I'm confident that the motor is solid now, especially since I had Dave @ KDR rebuild it.

JHew84

iTrader: (9)

I am not pleased with my GT35R kit from rx7store, if I could do it over I would get the kit from Aspec. Some fittings/lines were missing from my kit, and some I had to replace because they just wouldn't allow me to mount the turbo per Garrett's specifications. Aspec makes a good kit, they seem to use better fittings from what I've seen:
http://www.negative-camber.org/crispyrx7/gt35rpage1.htm


https://www.rx7club.com/showthread.p...ighlight=gt35R
https://www.rx7club.com/showthread.p...ighlight=gt35R
https://www.rx7club.com/showthread.p...ighlight=gt35R
https://www.rx7club.com/showthread.p...ighlight=gt35R
https://www.rx7club.com/showthread.p...ighlight=gt35R
I could go on with many more, "GT35R" in the search box on the single turbo forum produced all of those links...

The xspower smic will be fine, but you'll probably want to look into getting a bigger core at some point. I wouldn't go with a FMIC personally, the M2 large, or something similar, that has a stock mount location (or vmount if the funds allow) would be preferable in my mind.

Mods seem sufficient, I would get some instrumentation and a boost controller, but the essentials (PFC, injectors, fuel pump) are there. Yes that seems reasonable.

again I would recommend the Aspec kit if you insist on buying a kit. After the fact personally I would buy the Aspec manifold/down pipe and piece the rest of the kit together myself, I feel I could do it cheaper than buying the kit and would have the peace of mind knowing I have all the right parts and won't need to spend extra money potentially replacing parts in the kit.


I'm using the Racing beat street/strip clutch with their lightweight flywheel, and I"ll be running the same turbo at around the same boost. I'm sure there are others that would just as well though, but if yours is already slipping I would definitely replace it before going single.

Jason

iTrader: (5)

To clear a few things up about our kit. It was obvious to me that Jhew didnt know how to install the kit. Our kits come complete as we have installed the same kit a dozen times with no fitment issues or problems. Doesnt make JHew a bad guy but his experience with the kit is not the norm.
Also, our kit wont make 430-450HP on pump gas. It uses a .82 A/R which spools quick but will limit you to low 400 RWHP. If you are looking for more HP then we typically sell the T04Z kit as it will make more power and still spool quick.

TRWeiss1

iTrader: (20)

Thanks a lot for the great replies guys. Everything posted was very helpful, and I may re-evaluate my decision to go with the GT35R if it won't get me to 450. Thanks again!

DriftDreamzSS

iTrader: (4)

I have this kit. I am pleased with the spool time, but still trying to eliminate some boost creep before I can really enjoy it. There are a couple odd things tho. The oil feed is too long and you have to make a loop and it looks funny, not a big deal I guess. I didnt like the oil return setup, but its cheap to get stuff for -an return, but it would have been nice if the kit came like that. The thing I didn't like the most is the manifold, I think its sub par when you consider the nice waste gate and turbo that you get, but im sure thats what allows rx7store to have a low price. If I can get rid of the boost creep (im going from straight midpipe and magnaflow Ti exhaust to resonated midpipe and rb dual exhaust in hopes that the extra back pressure will help) I will be very happy. If you click the link in my sig there are alot of pictures of the install and info about my experience with it.

TRWeiss1

iTrader: (20)

^ Thanks a mil, definitely VERY helpful!

thewird

iTrader: (8)

https://www.rx7club.com/spec-tuning-154/spec-500r-508561/

Also, you shouldn't run over 16 PSi on pump gas without some sort of auxiliary injection.

thewird

TRWeiss1

iTrader: (20)

Yep, I should have mentioned that...I am looking into water/meth injection kits as well.

JHew84

iTrader: (9)

Again Jason I urge you to tell me what Garrett, a handful of reputable turbo suppliers, and members of rx7club.com ALL missed as I was installing my turbo? I sent dozens of reference pictures directly to Garrett (and others) and they were astonished at how much I had to clock the CHRA to clear the oil drain fitting you provided. After sourcing my own fitting it is BARELY within spec (per Garrett themselves!) but still not even close to ideal! My kit was also received missing a couple lines/fittings, in addition to the few pieces that just wouldn't work. Instead of blaming it on me, maybe you could take a little responsibility yourself? As I'm quite sure these issues are NOT my fault! I will at least allow the possibility that the kit I received differs in some way to the majority of kits you send out.

And while you may not think my experience is the norm (I know a few people who had similar experiences but choose to not be vocal) there is no reason for you to claim that I don't know what I'm doing simply because you provided me with a shoddy turbo kit. Does that mean EVERYONE will receive a shoddy kit? NO, but I'd still go with aspec personally, twice as much after basically being called an idiot by you Jason.

Jason

iTrader: (5)

Who are these so called turbo experts that said you cant install the turbo they way we provide? Garrett doesn't count, as they give a general rule on position of the turbo, but it doesnt mean it cant be run a different way.
There isnt one specific way to install a kit. Like I said we have installed them many times with the fittings provided and have not had any issues with them and some of them have been on customers cars for years. Of course you can source fittings if you want to do it a different way but it doesnt make the kit any more effective.
Any missing fittings should be brought to my attention as I would have provided them, but never got a phone call about that.
All our kits come with the same manifold, wastegate and downpipe. So there isnt variation between kits except the turbo.
Our kits are $1k less that A-Specs kit so it really depends on the money you want to spend.
Also, I never said you were stupid, I just pointed out that you werent installing it correctly.

JHew84

iTrader: (9)

You still haven't actually explained what you think I was doing wrong, basically what I'm getting from your comments is that the amount of rotation the CHRA had was acceptable, even though Garrett clearly thinks otherwise? I'm sorry but I'm gonna go with Garrett on this one, they did design the turbo after all. In fact you are the only person I've come across who thinks the ~40deg of rotation needed to clear that oil drain fitting was acceptable, which makes me think you are just misinformed!

I'm sorry Jason, but with the pieces you sent me the turbo kit cannot go together and be reliable for a road course intended vehicle. Many road racers have problems with turbos when the oil feed is not completely vertical, let alone even within Garretts specs. I can see people not noticing the issues with the kit if they don't road race, but I do and therefore the way your kit is configured just will not work properly for me. Under hard cornering I would have had issues, whether you want to believe it or not.

There are a few solutions to this problem, but none of them involve the fitting that you provided with the kit. I'm just not impressed with this manifold period (which appears to be a theme) so I'm going to replace it with an Aspec manifold when funds allow, which will eat well past the $900 savings I got from going with your kit. Again in my opinion I wish I would have gone with the Aspec kit, you continuously belittling my mechanical abilities isn't really helping my opinion of your company either!

spoolage

iTrader: (2)

From my personal experience on this forum --- I have seen a fair share of individuals complaining about products / turbo fitment issues sold through rx7store.net --- my only experience with rx7store.net is on small purchases and the only complaint I have is that they always take a long time to get to me.

As a person, Jason seems very knowledgeable and is always very helpful in regards to any questions I have to ask.

cewrx7r1

iTrader: (2)

A GT35R T3/T4 1.06 turbine will work.

I have the A-Spec GT35R T3 1.06 which has more top end and still reaches full boost by 3600 rpm even when running 16 psi boost on almost stock ports. Their T4 is even better (they did not have it when I bought mine).

Maybe Jason can get you the 1.06.

TRWeiss1

iTrader: (20)

How much power are you making?

streetRx7

iTrader: (5)

[QUOTE=spoolage;8640279]From my personal experience on this forum --- I have seen a fair share of individuals complaining about products / turbo fitment issues sold through rx7store.net --- my only experience with rx7store.net is on small purchases and the only complaint I have is that they always take a long time to get to me.

Me too^^ +1

mdpalmer

iTrader: (24)

Would be nice to see a GT35r car that pushes lower boost levels... something like 12-15 psi on 91 pump fuel. Anyone have this kind of dyno chart?

EDIT: This fellow claims to have made 370 whp (with a lot of other mods, mind you) on 12 psi: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/gt35r-spec-single-turbo-kit-motor-build-short-write-up-667240/

Jason

iTrader: (5)

The only thing I could make out from the pic you posted was your complaint is the coolant line would hit the exhaust side, which is true without adjusting the turbo to where it needed to be. I posted a picture in response. You made the assumption it wasnt going to work so you purchased a different fitting. Nothing wrong with that other than you didnt clock the turbo so you could use the other fitting.
Our turbo is typically clocked 15 degrees so you can get the coolant line on and route the oil return.
You saw the pictures of our manifold before purchasing so there are no secrets there. You may not like it but it works and keeps the price of the kit down. I could also make a $1k manifold if I really wanted but in the end it doesnt perform any better than the cheaper ones.
Im not belittling your mechanical abilities. Im just saying I install this kit a lot more than you so I should know if it works or not. I wouldnt sell a kit that doesnt work because in the end its a bigger headache.

If others were having issues with their kit then they can speak up or call me. As of now I haven't received one call about an issue with our 35R kit. Im willing to change the kit around if there are issues with it, but so far we haven't run into one.

We are installing this kit on a car in the next week. I will take detailed pictures of the install so people can see whats involved.

thewird

iTrader: (8)

14-16 PSi is what you should be aiming for on pump gas without auxiliary injection anyway. If you have 93-94 octane, tune for 16 psi, if you have 91, tune for 14-15 psi.

Don't go by internet dyno numbers. Every dyno reads different, sometimes even from exact same dyno models.

thewird

mdpalmer

iTrader: (24)

Point taken, but you're talking to an engineer here You can caveat tons of things about internet dyno charts, but sometimes they are still datapoints worth studying. Even if the dyno he was on reads 10% "off" (again, depends on how you define a standard from which to be off), something like 330/400+ on low/hi ends, that's still very respectable power for "lower" boost. Sure he has a lot of other things that may have influenced power production, and sure you can say that comparing two internet dyno charts is like comparing apples to oranges, but there is nothing wrong with taking it for what it is at face value.

FWIW, I personally am not interested in the peak power or any number per se, but more in the torque curve across the rpm range, just trying to get an idea. I want to see how it ramps up and when, how it persists (or not) as revs increase. I just threw out John's example as food for thought. He's a very good and experienced driver and when he says good things about a turbo I listen See attached pic for an example from another person's car, the torque curve gives you a feel for what the car will feel like on the street acceleration wise and that's what I am looking for.

Anyway to the OP: good luck with the endeavor, I will do it too one day

TRWeiss1

iTrader: (20)

Thanks palmer. Best of luck when you do decide to go that route!
I've been talking to a couple vendors about their kits, so I shouldn't have a problem finding a solid one.

zenofspeed

iTrader: (1)

Off topic.. ihavetwins, what steering wheel is that?