It's mainly an issue of the fuel octane you'll be using. If you're using pump gas and don't have any kind of WI, I don't recommend going over 14psi.



B

Yeah i'll be running 93 octane and no WI :(



We'll see what happens...

Be careful with it and ease your way into it. I'm very anxious to see the results. Speaking of results, I'd like to know the elevation of the area where the dyno is located as well as whether or not there's any 'inflation' of the figures afterwards...



B

Not argueing, I said specifically I think that the S300's can be decent, the one I priced out is all borg warner and built to spec using S300 parts. Saying "I want a S300" is like saying I want a "Chevy" it could be many different things. I have access to just about every wheel and part you can think of for BW. So I can make it any way you want. It gets a little more pricey when you start having me machine back plates and housings. That is why I say it's not worth it when people are selling for the most part standard units. Everything is going to have a minimum cost and when you start building custom spec'd units it starts to add up. So the only way you will make anything cheaper is to charge yourself less for the labor or start out with older(surplus)parts good luck when they run out for replacements.

Do I think you'll be happy with your turbo? Probably. Will it make any more power than a similarly sized turbo doubt it, there is only so much air x sized wheel will move. The trick is getting the combination right for your application. That includes numerous variables in trim size, wheel ratio, and A/r's for both front and rear. Doing that correctly will allow you to move that amount of air over a broader power band without sacrificing you top end. Personally I think if your only goal is 14-15 psi I hardly doubt you will be unhappy with it.











-S-

Elevation is St.Louis, look it up.



It's on a Dyna Pak 2000 dyno.

535 feet. Basically almost no altitudinal correction, then.



B

https://www.nopistons.com/forums/pub...1047683473.gif

Good luck with it! Hope you produce some good numbers.



B

Hello all, I am glad that I found this thread. A couple comments...



BDC, thanks for being respectful over here. I think that there were so many emotions flying at rx7club.com that things got a little heated. Not to mention that on top of that there were quite a few childish remarks that were being tossed around carelessley.



Aside from that I have purchased a AF61. It is going into a FB with a rew. I will attach some pictures for your viewing pleasure. I am in the middle of the build and will have it up and running before may. I would be more than happy to post up some pictures possible a video of the dyno pull.



So with that thanks for the kind thread.



Z

Hey I just looked at those pictures on your site BDC. Is it possible to have the john deere turbo housing on there. IIRC they are almost identical looking. The schweitzer housing does not look the same.

I think it is a John Deere turbine housing per the shape, coloring, as well as the part #'s that are scratched off of the AF61R that are visible on the John Deere unit. Admittedly, the 1.00 housing on the AF61R is a much better match than the 0.83 A/R housing we used, but still nonetheless it's a JD unit. The Schwitzer S300 housing for the Cummins 10L diesel turbo motor has big "dog legs" to help space the turbo out away from the engine, presumably for some sort of head or manifold clearancing. However, that the John Deere is built off of the Schwitzer S300 core, the turbine housings are interchangable.



B

Great thanks for the information.



Z

So the new numbers are out for the AF61. IIRC it was like 373 at 15psi and 400 at 16 or something like that. There was also a 20psi run at 454 or something like that.



I was just curious if people expected these numbers. What are your thoughts? Honestly I expected a greater jump at 20psi, more like 480.



Both cars had some issues that needed to be worked out. I will be curious to see what they hit when all is said and done.



Dyno sheets and full post can be seen at rx7club.com in the DR Autosports section.



Z

My car got 373@15psi, and that's, acording to Steve because of my hi-flow cat, dropping fuel pressure and maxing out my injectors. If i had a midpipe and 850/1300 combo injectors, i'd have over 420 or so at 16psi.



However, i'm happy with the results that i got and i'd rather have a hi-flow cat then a midpipe anyway.



Amel

Also the car that got 452@20psi had igntion break up and was not able to go past 5500rpm or so... So Steve let of at that rpm and that's all we got...



As Eric said on the other forum, every car that was tuned had problems and none of them actually were the true examples of what these cars could have done if everything was right.



The dyno sheets are posted on the D&R section and we all have videos, but they are huge and i honestly can't post them or host them. KaoticFDR1 on the other forum might to something... I don't know.



Amel

Amel, Thanks.



That is good to know. I was not aware that Steve said it should hit 420 at 16. I will be running 850's with 1600's and a a1000 so fuel should not be an issue. I also plan on running a small exhaust system. 3" downpipe to 1-6" mangaflow muffler.



I will be interested to see what I can hit.



When it comes down to it I want to see one of these things hit the 500 mark. At that point I would think that this is nearly the perfect turbo for my setup. Until I see that I guess I will have to just wish an hope that someone does it before me. https://www.nopistons.com/forums/pub...IR#>/smile.png



Z

idk if u guys saw this....





http://media.putfile.com/Rx7-FD3S-AF61R-tu...-steve-kan-tune



whats everyones thoughts on that.. i for one, am pretty impressed..

Someone on the RX7club forum just put up 420whp @ 13psi with the Af61R

Link: http://www.rx7club.com/forumdisplay.php?f=23

Reading through the all the trail cake though, it looks more like 420 hp at 16 psi with methanol injection...Methanol is an oxygenate and adds charge cooling. Its a typical 60mm range turbo, although I have to say comparing it to other turbos in that size range, the curve of the schwitzer is slower and lower than alot of turbos in that range, comparing it to td07, 60-1 etc etc. The 25 year old design and rotating mass does show up...