yes that is my dyno - see post #2 for details

 

So the real differences is modification of the turbo and maybe other injectors?

What is the price for these differences?

 

I suspected so. But also read that RX7 has sequential turbos, that sounds like a good idea as well.

 

Not with today's technology.

 

A sequential turbo system was necessary due to the unavailability of today's electronics to control boost and also the ECU technology that is on the market.

A single turbo is more than capable of providing the necessary airflow to power the rotary and do it at a pretty early stage in the RPM band.

 

There are plenty of people out there with bigger and better turbos and lots more other expensive go fast goodies on their car than I have that can't seem to get that kind of result .

The difference is I was prepared to push my turbo to it's limits and do things that 'experts' told me would not work and to hell with the consequences . I was going to rebuild the engine anyway so didn't really care .
Learn't a hell of a lot in the process .

 

Like?

 

Like what works , what doesn't work ,what matters , what does not matter , how far is too far , how to make do with what I have without spending more money - that kind of thing .
Picked up some good tips from you along the way - sometimes given freely sometimes with a lot of prodding .

 

Wasn't that a difficult way of saying "I don't want to tell"..?

If not;

What did work?
What did not work?
What did matter?
What did not matter?
What is too far?

 

Brettus is just trying not to drive this thread further off topic. To know what works and what doesn't a thorough research will answer most of the questions.

 

Search the threads I've started and then see if you still want to ask me that ......


https://www.rx8club.com/series-i-major-horsepower-upgrades-93/getting-most-out-your-greddy-turbo-without-breaking-bank-172542/

 

Excellent:-)

 

As most of you guys probably knows he does have a dyno at his homepage, http://www.performancedesign.com.au/...EngineDyno.pdf

But this is crank HP. Anyone dare to estimate what 340Hp would transfer to at the wheels? Even though the dyno starts at 3000rpm it seems like his kit is more potent in the lower range compared to Pettit.

Anyone agree/disagree?

Btw Brettus: Great to have this thread for comparison. Creds!

 

guys-- i see no one is taking the engine to 9K? At least I havent seen one.

 

I would guess 280-290 would be the wheel HP 15-17% loss. I find it very similar to the power we see from Pettit dyno's and I thought that from the first day he announced the test results.

The one problem I have with it is that it costs about $4000 more than the Pettit, and appears to be a little more complex to install. If I saw a good amount of HP over the Pettit or even an upgraded Greddy kit, then I might have a different opinion.

Price per HP is a big issue to me.

 

Every car I've put on the dyno I've taken to the fuel-cut. That means 9200 RPM on most cars.

 

Are any of those dynos posted?
OD

 

I'm sure.
Peruse some of the dyno-day threads.

 

I did--but couldnt find any. I will keep looking.
OD

 

I don't keep any - I do so many it would be an out-of-control file management nightmare.

 

you should see my "stuff"
I accidently threw out a $2K check once--wife was pissed.
OD

 

why do you want to see dynos to 9000 OD ?

I have a couple of my earlier (lower power) ones still if you want to see them ?

 

Thanks but no thanks. I have been trying to get my car classed in NASA TT (requires dyno to redline) and since my redline is unchanged from oem I was looking to see if anyone had posted a FI car 9K dyno sheet.
So far have not found one.
D

 

Probably a novice question:
On MM dyno you can see Air/fuel ratio peaking at around 2500rpm, see http://www.mazdamaniac.com/upgrade/msql101.jpg

Why is this happening in this area?

 

Finaly got the procharger dyno tuned and tested and the Not Cal dyno day on8/21/10. After about 16 runs on the dyno we got to the 300 HP mark and MM called it good. Might have had a little left, and the engine was getting heat soaked but we were already a few hours behind on the daily schedule and we were happy with the results.

I plan to make a cold air box so that I no longer pull in hot air from above the radiator. I will also be ceramic coating the intake tube and box to help keep the intake air temps down.