And his posts said: """"On my little dyno site """"(yeah I know it doesn't have every dyno in the world)... I can't find any car with confirmed-stock-ports that makes more peak hp than sk8world's.

We were comparing the GT40R to the GT35R and 35/40. I think Wargasm just checked all cars on his site...

Ok, no more post from guys who do not own a single turbo car nor have one that runs!!!!! Just messin with you Stephen... Just having some fun. I hope to make it to the car shoot out this month at Steele but its not looking good...

 

non seq twins is pretty much the same thing as single, but yea my project has dragged out forever, I just kinda lost motivation. Maybe I'll find it again one day haha

When is the shoot out at Steele? If you go let me know and maybe I'll head out there and meet up with you.

Stephen

 

COME ON GUYS! Making over 400 RWHP is an awesome feat that not many can say they did! Be happy for the guy!

Sounds like you are right on considering your numbers are damn close to mine.

It looks like the same responses I received. Oh well, my measly 457 RWHP RX7 is still running, and running good I might add.

That turbo comes nice and hard doesn't it?

 

"That turbo comes nice and hard doesn't it?" Yeah, I love it! Very happy with my choice..

 

Here is a pic of my set up.

 

Mike, have you had it to the track with the boost turned up?

Stephen

 

not yet. Rain on every track day it seems.

 

Well, unlike some people in this thread, i'll congratulate you! Very good numbers, but as they say, having a dyno printout with a big number is certainly not the be all and end all! I'm sure we've all heard of cars making serious numbers, and are completely undriveable! As long as YOU are happy with the car and the way it drives, that is ALL that matters!

It's great to see a GT40R making some good numbers. I think i'll be 1 of the first in Australia to fit a GT40R to a 13BT. I've heard of many people using the bigger GT42R and RS on drag cars, but not a GT40R on a circuit car. Anywhere near 400rwhp would be just fine for me!

 

Thank's Lukus! By the way the car is very driveable. I drive it to and from work all the time. I hope to fine tune it a bit up top and make a 22 psi pull. I would like to see 450 on the stock ports!

 

Hmm, that's nice. Make a post not related to the original topic to tell someone they aren't posting about the original topic....

Well, aside from the fact that I stated clearly " Maybe it has to do with a stock port motor or the turbo's efficiency at under 20psi"
Someone suggested that the power was being restricted by him having a .84 A/R exhaust housing. I stated that shouldn't be the case since I make more power with the same size housing and a ported motor, IE the housing is not the restriction. I guess I thought maybe this did apply to the original post to say that there would be more power when/if he went to a ported motor and that the turbo would not hold him back. I guess not.


If you think saying I'm disappointed with the numbers is hating then you need to lighten up. Everytime a new turbo comes on the market is is aclaimed by many to be "the best". I had high hopes for this turbo as did everyone else. My ONLY point was that in the end they all end up performing about the same. I never said 400 RWHP sucked or wasn't an accomplishment or called the guy names. Actually I believe I said, "400RWHP is no small feat for sure, especially with these cars." before someone posted and called me a "troll". I guess that means I'm not glad to see another hi HP rotary.

No he didn't. But then again he didn't ask for any input from anyone, which by that logic makes all the replies bad? Last I checked it was a public forum and by posting here you have to take the good with the bad. I never insulted him personally. I only meant to say that I have not seen the performance numbers for this turbo that lead me to belive it would have been worth my time to wait. I chose another option available to me immediately and believe that in the end the numbers will be the same.

 

I don't think that the turbo was the issue, I think it has to do with the manifold/downpipe design more than the turbo itself. I'm currently testing the GT40 turbo (no R), and it felt just as strong as the other turbos I used on other cars. It gets around 10psi at 3200rpm and holds 17psi till redline w/o any issues. I'll post some dyno #'s when everything is sorted out with this car.

 

Thanks for the response, to me and to some people on the thread who understand exactly what im saying it seems you had nothing positive to add to help him.. especially on your last quote..
His original post is how hes really happy, excited about his #'s and knowing its the orignal stock port engine.... I guess you call it "stealing his thunder"

no hard feelings though and thanks for clearly your statement up!

 

Guys, I dont really care what carx7 has to say. I am very happy with the results. There is more power also to be brought out. More later.

 

I think that the manifold and from A-spec looks like pretty proven design Scoot HKS and Apexi cant be to wrong.

 

Yep!! All those manifolds are basically the same. Apexi & HKS seem to agree. Apexi with their RX-6 and HKS seems to like that design manifold for their huge T-51RKAI ....Scoot has that set-up on a combo P-port motor!

 

From what I've found, the GT40R (88mm) has only a 64.7mm inducer. This is smaller than a Turbonetics T66 and Mitsubishi T78. Considering this, 430rwhp @ 20psi on a stock motor sounds damn impressive to me. However, the 358@15psi sounds a little wierd.

Looking at the compressor map, it appears the GT40R (88mm) map matches a 60-1 from low boost up until 15psi. From there on, the 60-1 won't make much more power, but the GT40R should continue to make more. This should mean that your 15psi run should make approximately the same as a 60-1 does at 15psi on stock ports... no?

 

That is what has puzzled many of us using this turbo. Almost all the dynos from the 40r seem to be real close. Although no one has dynoed with a large ported motor yet. I guess I need to see what fd's have made on a stock ported motor with the 60-1 at 15psi.?

 

I seem to recall that Rx_treme made 380rwhp on a stock-port 13bt using the 60-1 @ 15psi.

 

Sorry, my mistake. I forgot the GT40R is a "56-trim". That would mean it's inducer is ~66mm, as a Turbonetics T66 (65.5mm) and Mitsubishi T78 ( 66.0mm) are.

Also, it looks as if the gains in horsepower on the GT40R won't be as drastic with anything over 20psi boost (according the the compressor map supplied by ATP Turbo). It also looks like it starts loosing efficiency right under 25psi.

In any case, I'm guessing a Q-trim T66 might be a better choice for someone shooting for 500rwhp+.

 

It is actually a 52trim some preproduction ones were 56trim.

 

Sean what is the size of the wheel on fhte gt40r that came with the kit?

 

If it is a 88mm (exducer) wheel, and Sean says it is 52-trim, it will calculate to a 63.5 - 64mm inducer wheel. However, I have not seen any compressor maps of the 88mm 52-trim wheel. The journal bearing GT40's have 50-trim and 54-trim compressor maps available on www.turbobygarrett.com and the ball-bearing GT40R have 56-trim compressor maps available on www.atpturbo.com, but not ball-bearing GT40R 52-trim compressor maps...

 

You need to take a measurement of the wheel across the inducer of the comp wheel. then I could tell you which trim your at. But it should be a 52 trim wheel.

 

This is a little of topic but thought I would share my day. Went to the track to get in a few runs today. First run was ****, trying to work on to many things. Second run at 17psi I went 7.5 at 96mph. Turned up the boost to try and get a 20psi run in and my clutch went to ****.. Came out of the hole fine with a 1.7 60 foot but by the time I got to the top of first I could tell the motor was not putting the power down, felt like I was spinning. Shifted to 2nd and the motor just reved, tried 3rd and same thing so I just coasted through. Smoke started coming in from the shifter area and I could smell the clutch. Also my car started to hold idle at 3k?? Never heard the alarm (over rev) go off so I do not think that was an issue but the ride home it would not settle down from 3k . Anyone care to give me an idea? I hope I did not hurt the motor.... clutch is an ACT. Not sure of the model but Cam told me when he installed it that it was the same clutch he had in the 3 rotor car..

 

I would say first check for a manifold/induction leak.