411.51 Max HP, 386.03 Max Torque dyno sheet picture attached. I finally got my car to the dyno to do 3 power pulls. Same tune and setup I ran at the track 2 weeks ago when I ran 10.87 @ 128.90. This is a big improvement in numbers compared to last time I was on the dyno 2.5 years ago running about the same amount of boost, but this time with my rebuilt motor from www.rotaryrebuildstore.com and other improvements to my setup, still non sequential stock turbos.

For the 2nd run I turned down the boost a tad bit only 2% on the electronic boost controller, made a few less hp, 3rd run I turned it up a tad more than the first run an extra 2%, and made 411hp. Peak boost hit on the electronic boost controller was 22.9 psi, that's the boost spike when full boost hits then it drops to around 20 and slowly down a little more as I was watching it on the boost gauge. HP held up above and around 400 for a good bit through the rpm range so that is pretty nice.

I am uploading a youtube video of the dyno pull also.

 

Here is the video http://www.youtube.com/watch?v=iN7Eh0Pye_o

Notice the little fan, bigger fan might have been nice, also didn't take advantage as much having my custom cold air intake air filters in the bumper where air could have been blowing on them like when running at the track.

 

excellent! congrats!

is the engine ported? and what gas are you using? any water or meth injection?

 

Thanks. It's a standard streetport. About 50% sunoco gt100 race gas and 1 oz per gallon premix penzoil 2 stroke oil. No water or meth injection, I tried that a few years ago, my tune and low knock is good without it and more power.

 

Wow! Why did I go single again?

 

Damn.. I wish I had that setup..

 

now that is cool. good work.

 

what other mods are done to the car? and can the twins safely handle that much boost?

 

Thanks. See my mods link in my signature in the first post. With the right mods a couple others and I have been running this much boost for years, I turn it down when its hot out and it probably decreases their life span but I never worried about that because they are cheap and not too hard to find.

 

Talk about dialling in a setup. Great job. you are making a lot more usable power than most singles at your power level. And ~50 more torque! Simply amazing. Keepit up.

 

Thanks! That is nice to hear. Last time on the dyno it made 372 and the time before that 342 all with high boost on the stock turbos. I was very pleased to see all my work dialing in the setup and trying to get more out of it over the past few years has made a big difference and great results!

 

I'm curious what kind of timing you are running with that octane fuel and that much boost on stock turbos.

 

IGL, p19 & p20, n10-n20

9 10 11 10 10 10 13 16 19 21 22
8 9 10 9 8 8 11 14 17 19 20

 

i find this is an amzing result
i thought more that 320 bhp on stock twins won't be good for the rx7
what did you change that you can run this setup?

 

I did a lot, see my mods link and pictures link in my signature in the first post. Thanks

 

still have those twins for sale...

just messin.... impressive tom..

 

Thanks

 

That is some crazy # for twins, btw what exhasut system u r running? Also What injectors and fuel pump u have? Men u made more power than my BNR stage 3 full non seg setup which I think is damn impressive for oem twins.

 

Awesome results! You're part of the reason I'm not going single quiet yet and attempting to maximize the stock twins for as long as I can

 

Because at that boost level you'll make about 100 more rwhp with an optimized single turbo setup..... and because (for those of us who like to road race) you can run those boost levels lap after lap, without melting the turbo(s)

Congrats Tom, awesome accomplishment and definitely an outlier on the bell curve. Goes to show what can be done with perseverance, know-how and lots of hard work

 

A downpipe with exhaust wrap and a rx7store resonated midpipe, this is all I run when drag racing and when I was on the dyno.

Here are some of the mods from my mods list. Power FC, PLX R-500 Wideband, KGParts.com Kit C fuel system, 550s in stock primary rail & 1680s in Keiths top feed rail, aeromotive fpr & electrical fp gauge in car, RX7.com Cosmo/Supra fuel pump, rewired fp, greddy profec b-spec 2 boost controller. Apexi 3 bar map sensor. PFC datalogit. Fast reacting ait sensor in the greddy elbow.

How much boost did you run though, cause I know with mine every little bit of boost makes a difference, I think mostly up to around 18 every little bit makes a significant difference and above that it seems like a little but not alot.

 

Thanks. I did so mainly cause I didn't have the money to spend alot at one time, and I set this goal like 4 years ago to hit 10's without going single, I was also a little surprised with how much power I was able to get out of it.

 

Ya I never got into road racing. Thanks! I just had to google "outlier" lol, but definitely a good way to describe it since most people don't want to try to push the stock twins as much as I have or don't think it's possible to be able to run that much boost or make that much power.

I am thankful for this forum and all the members who have helped me along the way, all my knowledge has only come from reading and learning everything on this forum, never had any close friends with rx7's or anyone really show me in person what to do or how to do it.

 

I'll be very interested to see how long those turbos last.

 

Well I did replace them a couple months ago, the set that was in there were working good but I found excessive shaft play and figured I would replace them, since they are alot cheaper than getting bnr's or a single, and I can make decent power with them. I had it all apart because I was putting heat reflective tape on the lower intake manifold so it was no big deal to replace them. That set was put in when I had to get my engine rebuilt 1.5 years ago and the turbos had broken apex seal damage. And that set replaced my original stock turbos that started blowing oil I think and had too much shaft play, that's when I went non sequential about 3 years ago. So ya I've been through a few sets of stock turbos lol, but hey still alot less expensive than the alternatives, paid about $200 for each set in good shape.