hey....

well my car is finally getting the dyno time which i have worked so hard to get to. I have been waiting a long long time to find out what kind of power my m2 twins are pushing out.

I have decided to give xs engineering another shot with fine tuning on their dyno. I have heard nothing but great things from their customers for at least six months and it seems they are having a tremendous amount of success. I am very much looking forward to what they do.

The car went on the dyno for a short time yesterday. a problem arose with the wiring harness and it is getting replaced...then its back on the dyno. Guesstimated time of completion is four days as we are waiting for a new harness.

They did a half pull just to see where things were...I got a call from Rotary Reliablity and Racing shortly after to let me know that I supposedly put down 250 RWHP around the 2800-3000rpm range. Louis at RRR was very pleased as he and nick built that motor and did a lot of work my my car.

I am very happy if that is the case, though it seems too good to be true. I shall wait to see the results of the tuning and will post the charts up here as soon as they are done. I probably shouldnt have said anything as to not make an *** out of myself..but Im just way to excited right now.

wish me luck!


jason

 

WooHoo! Man, I would be having RX-7 withdrawals by now! By the time you get your 7 back, the snow would have melted off those crummy roads and then it's Zoom-Zoom time baby. Did you heat coat the manifold?

 

I was surprised to see you letting XS tune it again since they did a shitty job last time. Let's hope they don't put in a map for single turbo or something.

Hope it goes well since I and many others have been wanting to see what they can do for a long time now.

Tim

 

Hey Jason, that would be pretty cool if youi were making 250 rwhp by under 3K rpms although it does seem pretty unbelievable. But being setup with BB twins sequentially might provide that power that low. Going by that it would seem you would top off about where the Stephens BNR twins did running non-seq...probably about 410 rwhp. I should have my dyno sheet tomorrow when I pick up my car - try to do a run at 15 psi so we can compare yours with my stage 2s

 

I really dont think it's possible that you're putting down 250 rwhp @ 3k rpms because that would be equal to about 435 lbs of torque

regardless, keep us posted.

 

ahhh...cheers to the mathemetician for clearing up the telephone game.



goracer...I decided against coating the manifold as the turbos are cherry and I would prefer to keep them as is. Had I gone with the decision to pull them apart and port out the manifold, Id have lost too much gasket space. I would have gone with the coating at the same time while they were apart though.

Its been so long since ive had fun with the car. I hate winter. But it does allow for plenty of time to tinker.


jason

 

Pics!?!?!?!

Blake

 

i wish...Im in boston at the moment and my car is at xs.


j

 

I actually did the calculation before I read any of the responses and did the same double take: 435 ft-lbs at 3000 rpm!!!!

Artguy: If you put down 200 rwhp @3k rpm, that would equal about 350 ft-lbs which is more believable. That torque would equal a horsepower peak of about 430 RWHP. Yikes!

Looking forward to getting the final numbers and all the details.....I hope XS treats you right this time. If they do, I might consider going there when the time comes.

 

i beleive what artguy says is possible. my car with stock twins + engine has about 240 rwhp at 3k. i have the dyno tuned from dave at kd if anyone wants to see

 

please post as it is impossible.


rynberg: I will let you know how it goes. Im going to give them a shot after hearing from rotary reliability over and over again recently that i should trust them and that xs has been making the cars they work on run "so great".

it seems things are going well over there...but thinking shows that the numbers that were relayed were not right. I was working at the time so perhaps i misunderstood what he was telling me. I will let you know how it turns out. Honestly, I hope you are able to take your machine there. That will bode well for all of us.


j

 

look post **** when you have a dyno sheet. I dont want to start "well I should make this" It is bullshit!!!

Start a thread when you have a sheet O.K

 

hey haggard....go rain on someone elses parade you grumpy old man. Im like a kid on christmas morning here about to open my packages ........and there are people who have been asking me to let them know when Im finally going on the dyno.

j

 

Baseline (Blue Dynorun.010):
Max Torque = 291.2ft-lbs. @ 4700rpm
1995 Mazda RX-7 (FD3S): Stock engine, Stock sequential twin-turbo, A’PEXi PowerFC ECU, A'PEXi N1 Exhaust, A'PEXi GT Front Mount Intercooler, A'PEXi AVC-R Boost Controller @ 15psi, ND 550cc primary injectors, RC 1300cc secondary injectors, XS Frontpipe, XS Midpipe.

Torque was 230 at 3krpm and 290 at 4krpm.

Go to this site and find the dyno chart comparing stock twins with T04e/s at 15psi.

http://www.xs-engineering.com/

Stock twins kick butt till 5-6k rpms.

Ken

 

what's up artguy.....i was at XS yesterday and i saw a black fd with a rotary reliability license plate frame.....must be yours?

 

Well definatly keep us posted on everything!!!

Also, find out tuning info like peak tq a/f and Leading timing. Do you know what split they are running? Stuff like that.

Also, what brand dyno they using? If its a Dynojet ask them what wheel losses factor they use??? You'll prob need to talk to the actual tuner or dyno operator to get that info....which shouldnt be a big deal if they are tuning your car

I hope it all turns out the way you want it to.

STEPHEN

 

So your saying you make 420lb feet of tq at 3000 rpms??? I think your getting your tq and rwhp lines mixed up. I can see with seq having maybe 240tq at 3000 which is 137rwhp but unless you have some turbo no one else knows about your not making 420tq at 3000.

STEPHEN

 

nof has stock twins. i saw his dyno sheet a long time ago. it is possible he made 240rwhp you never know

 

Yea, its possible he made 240rwhp, but not at 3000rpms, espcially since your only running the pri turbo at that point.

They someone just jacked up his dyno numbers or didnt scale the lines right. Acording to his sig he's only traping 115 in the 1/4. He isnt anywhere remotly close to a car that makes even 430tq at peak much less at 3000rpms. To make that rwhp @ 3000 would require 430tq @ 3000, there is no way his one stock primary single turbo is making more tq at 3000rpms than any set of twins made combined. The most tq I've ever seen on stock twins is around 350tq and that was with BOTH turbos running AND at peak not at 3000

And believe me I've seen a lot of dyno sheets for stock and modded twins

STEPHEN

 

hey ...

I got some clarification from RRR on what my car did on that half pull...as i was confused...the first half pull they did was at 14lbs of boost and I put down 250rwhp on the first turbo. I am ANXIOUS for the sheets!

whats the link to that dyno site with all the great dyno sheets....ya know the one where you check the boxes and search. spo...spo's is on there..as is boostns and rikkis and cheuks and everyone elses. I searched...no luck.

rynberg...RRR has a very good relationship with xs right now. If you need anything done on your car before xs works the tuning magic then they are a good pre tuning stop. they found a couple vacuum leaks i wasnt aware of and an faulty solonoid that i had previously tested as ok...it wasnt.


j

 

who knows maybe the boost spike on the primary turbo to 18psi at 3k rpm

 

uhm..no thanks vosko...i prefer others to enjoy such tuning experiences. haha


j

 

I actually live up in the bay area and am pretty damn happy with my mechanic. Have certainly heard a lot of good things about RRR and no bad ones though. I certainly wouldn't mind the drive down to XS if they are really on the ball with tuning the PFC...

The numbers sound good so far, it should be interesting.

 

i'll post my dyno tommorow or later maybe the print out is wrong or maybe i'm reading it wrong? it says 240 rwhp but 3200 i didn't have the dyno in front of me the other day i'm not saying i have 430 tq my peak power is 314.5 rwhp and 276.9tq dynoed by dave at kd

 

The page that artguy is referring to is here:

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

There are about 70 dynos (mostly rotary) on there that you can pick from. If you have one with a mods list that I don't have on my page, email it to me at brian@pop.net with the graph + mods list and I will add it for you.

Brian