OK, I had it last night but now I can't seem to find a site with GT35/40 kits.

Can some one point me in the right direction?

Thanks.

 

ASPectuning used to make them but now they make the GT40R. What's the latest on your M2 twins?

 

http://www.a-spectuning.com/

 

A-Spec Tuning (http://www.a-spectuning.com/) makes BOTH a GT35R (a.k.a. GT35/40) and a GT40R kit. The 35/40 kit is listed on http://www.rx7store.net/ also.

-Max

 

"What's the latest on your M2 twins?"

Finally getting around to putting my new Pineapple street ported engine in and one of the M2s has a leaking seal. Not baddly, put no point in putting it back in with a new motor.

I have been speaking to the folks who built this setup:
http://www.gcg.com.au/
and the cost is too high to send them back to OZ for them to rebuild.
And since they are Garretts, I am looking into having them rebuilt here or perhaps going single.

So I am looking at the RX6 kits and the Gt35/40 kits.

I also have a brand new set of BNR Stage 3s sitting here.

Choices, choices, choices. I just don't know what to do?

So Max, educate me.
A GT35R is the same as a GT35/40?

 

"What's the latest on your M2 twins?'

Well, I'm finally getting around to putting in my new street ported Pineapple motor.
And one of the turbos in the M2 set is leaking oil. Not real bad but there is no point in putting them back in with the new motor.
I have never seen the full potential of these turbos due to the fact that it turned out I had very low compression in one rotor and low compression in the other rotor. The M2's still made 282rwhp and 336hp at the flywheel even with the low compression.

I have been talking with the folks who make this setup: http://www.gcg.com.au/
and it will cost to much to send them back to OZ for them to rebuild, so, since there are Garrett turbos I am looking to have them rebuilt here.

At the same time I am looking at RX6 and GT35/40 kits and going single.

I also have a brand new set of BNR Stage 3s sitting here.

Choices, choices, choices. I'm just not sure what to do. :-)

"A-Spec Tuning (http://www.a-spectuning.com/) makes BOTH a GT35R (a.k.a. GT35/40) and a GT40R kit."

So Max, educate me. A GT35R is the same as a GT35/40 ?

 

Opps!

 

lol

Yeah, they never return any of my emails! I wanted to just send the snails to them. I think it's a waste of money to send that heavy *** cast iron manifold and pay all that shipping to the land of OZ. Although I was thinking of 25R wheels because I don't want to boost 17-20lbs for the sweet spot. Oh and besides, my manifold is cracked on my twins so to upgrade them is a waste of money.

I am now focused on either the GT40R or the T04Z ...for next year anyhow (money tree is out of leaves).

 

As I understand it, GT35R and GT35/40 are two names for the same turbo. There have been a number of folks running the GT35/40 that have posted their experiences on here. I haven't driven a car with that turbo, so anything I post would just be hearsay. The kits from A-Spec seem very nice from all the reports I have read, however.

Check out their GT40R kit, too. It's a little bigger, and the compressor map looks fantastic. It should still spool pretty nicely.

-Max

 

I have the 35/40 or 35r whichever you want to call it. It's a great street turbo with virtually no lag.

 

Just came back from A-spec (I had the engine rebuilt + GT35/40) after 600miles+ of breaking in the engine. Everything was good, needed a few adjustments and now I'm up to 12psi. Car feels so much strong now boost has no lag, no hesitation from twin switchover, power is plenty with very smooth delivery, & speed builds exponentially! I am very pleased.

I had thought about the Pettit's, M2's & BNR's upgraded twins but I knew I would sill have to keep the rat's nest + all the solenoids. This would have made for poor reliability in the long term (please no flames) as they would be failing one at a time.

I am very pleased with my decision. We'll be tuning for 15psi on 93 octane & 20 psi on 100 octane racing gas with switchable maps on the PowerFC.

 

The GT35/40 is sounding good.

But if you look at some dyno plots at:

http://www.catenet.net/dyno.php

it looks like the RX6 can put out similar numbers and perhaps spool a bit faster.
Both turbos seem to do better with over 15lb of boost.

Like I said, choices, choices.

 

The 35R will way out produce on the top end if you were to turn up the two also, all those dyno's are with the old manifold design the newer design spools a little quicker still.

-Sean

 

Check out the GT40R, too. I think the GT40R will do well (be efficient) at pump-gas boost levels, where some of the others seem to run best at higher boost levels than pump gas will safely allow. The GT40R looks like it would also work well at high boost levels, but it seems somewhat unique in it's low pressure efficiency. However, this is just speculation from looking at the compressor maps, rather than actual comparisons of real dynos. Still, dyno comparisons are not always that great since you don't know how well the cars are tuned or what's in the rest of the system (IC, ignition stuff, the real boost curve [my RX6 plot was at 15 psi @ 5000 RPM and dropped to ~12 psi by 7000 RPM due to some boost control issues], etc.).

-Max

 

Oh I agree about the "tuning" or lack there of issue when you read these dyno plots.

Unfortunately that's all I have to go on since it's impossible to get to ride in cars with all these different turbos.

And to keep this going a bit, heres what I have now that I could use with a single:

M2 large intercooler
850/1300 injectors
Power FC with DataLogit
OZ A/F meter
Midpipe with Borla in it
Cat back
Jacob's Ignition with FC coil
Pulley kit
Aluminum flywheel
Large radiator
Brand new Pineapple street port eng.
And a total rebuilt tranny

 

Not to mention cost, ease of replacement and the fact one can be rebuilt and have easily replaceable parts, while with the other your SOL.

 

I think what you have to ask yourself when you look at the 35r vs. the 40r is what you plan to use the car for. My car is mainly street driven with some track events. IMO the 35r is perfect for the street; plenty of power and yet great spool for when you're putting around town, however, if you plan to use the car for more straight line races the 40r may be your better bet. Main thing is deciding what you want to use the car for and that will be the big decision maker for you.
-Nic

 

What kind of wastegate comes with the GT35/40 (35R)? How well is the rest of the kit made? I am curious because I hear that the kit makes a lot of power and spools quickly but some of the components included I've never heard of before

 

oops nm, i just saw the site it comes with a Tial

 

From the 2 cars I rode in the the 35R kit all I can say is DAMN! Almost instant spool, great power, silky smooth. The 40R is a bigger and stronger trubo and just like Broken09 said it might be better for a car that isn't a daily. But either way you have two great choices Capt. Bill.

Zach

 

I bought the GT35/40 because I wanted quick response for track & street, not for the 11sec of fun in a 1/4 mile.
It's lighting up tires on 3rd gear!

 

I fully believe that and have experienced it in person. I think that the 35R might just be one of the best all around turbos for a 13B.

Zach

 

If you buy the A-spec 35/40 kit you won't be dissapointed with the craftsmanship. I'll tell you that much. If you drive the car on the street you'll love the response and you'll have plenty of power. Well at least until you decide you want more.
-Nic

 

Gee, How MANY times have I remarked and talked about these "twins" and their hp and reliability.

 

Ok, reading all these posts makes me want a gt35/40 for my first gen project. I am putting an 88 t2 motor in a first gen. It will be mostly street driven with track events. Since the motors new and hopefully I won't blow it up, it will be runnning stock ports for a long time.

Is the gt35/40 overkill?

I don't know that I want to run at 15 lbs of boost on the street, maybe more like 12. I would like to have the option to turn it up a little though when I am really feeling the need for speed.

Someone posted that you need to run 17 lbs to feel the sweet spot? Is this for the gt35/40 because I don't want to run that much.

One last thing, it's a brand new motor. I know your not supposed to boost while breaking in a motor so maybe I should break it in before putting this turbo on huh? Since it sounds like it makes boost soo low I may not be able to keep it off boost.

Oh yeah, will I be able to get this power to the ground or should I go with a smaller turbo? I am going to get either a quaife diff or a GURU from Austalia. Not drag racing, just turns.