Tell that to the NA MT 6 port driver who owns your turbo Auto ;)

Time will tell. I'll bring dyno sheets. Unless a local owner wants to go to a track day?

Not really since we'd be spooled up long before that and pulling away. Then just when your producing max power you have to shift.

Where the engines are equal can change. It is normally 6250, and Mine is at 5500 with only 6PSI boost, and I'm planing on that going lower the higher my boost levels go.

I'll admit there is a small time spent shifting, but it is very easy to tune in flat foot shifting.


It wears pretty hard on the clutch but it's just as do able on a standard as a Auto. Even if someone does not do that. Then it is only an advantage in first.

When driving down the street and you downshift to 4000 and are below your torque max. We'll be starting out at 6000, basically right at the torque max and fully spooled up.

No benefits going below 6000 (except in 1st and second ) . Aux port efficiency is more to do with the speed of the rotor past the port but is also affected by the rate of acceleration as the valve takes time to open .

Probably the best thing to do is stop responding/posting and let everyone else blab off until the final results are in. The issue in general is that most people want to start their thread about how big and bad they'll be in theory, rather than waiting and laying it out results and all after it's done.



.

Good advice, Team.

Car is being shipped in two weeks. I am like a kid counting the days til Christmas.

What's the latest ?

Car goes to the shop tomorrow!

Cool . Keep us informed ... we are genuinely interested in seeing a good outcome even though we think the turbo is too big ;)

Thanks for the kind words, Brettus. It's a nice change of pace that people can share a contrary opinion without coming down like a ton of bricks. That being said, I don't think I'm going to be in your league. Regardless of turbo size.

Good luck BBC! Don't listen to the haters

Update time!

Car was put on the truck for Florida on Thursday. Radiator and second oil cooler were in the backseat. I took a few hours and straightened out bent fins with a pair of tweezers. Worked quite well. Car will arrive at the shop on Monday, and work can begin.

I have also sourced an Interceptor X EMS, and am hoping for some gauges and a gauge pod. Gotta love the For Sale section of the forums! I have also had the exhaust manifold Jet Coated, and the intake pipes were freshly powder coated silver.

Still looking for a boost gauge/controller, wide band AFR gauge, and possibly fuel pressure gauge.


https://cimg0.ibsrv.net/gimg/www.rx8...5e81a2b03a.jpg


Ready for his first out of state vacation!

https://cimg7.ibsrv.net/gimg/www.rx8...faff01442e.jpg
Loaded up on the truck. We spun the wheels trying to get it up the ramp. Under my car was a GORGEOUS 2003 Corvette Z06. Not a scratch on it. Less than 10k miles, too! Unreal.

Hey bad, great project you got going on. Just to let you know I have a supercharged auto 4 port rx8 pushing around 270-280rwhp. Brettus did the tuning for the car and he really know the function and limitation of the 4 port. Apart from that, just to let you know you will need to buff up your transmission for gear changes if you are running stock transmission. With my stock transmission I had to let go of my throttle to change gears otherwise it will be almost stuck in neutral and free raving for a second or two until it locks in next gear. After buffing the transmission it is pretty instantaneous up to 7500. I have found it shifts faster in Drive rather then paddle shifting too.

Tofu

Great to hear from you. I have read your thread backwards and forwards. When (not if!) I blow it up, I plan to copy your hybrid 4 port build strategy.

So if I don't go crazy with gear changes, it should hold up?

I know you did your build in Oz, so the suppliers aren't the same, but the transmission rebuild is probably in my future. I'm just hoping to get one more season out of it.

What transmission fluid do you use?

Obviously you raised the rev limiter on your unit, but my turbo should max out below 7500.

Should have done your homework and purchased an Adaptronic rather than the Interceptor


.

what ?

Brett

I said that based on this dyno chart, which was made using the same kit I am using. The power backs off after 7500. In addition, I am using a smaller A/R ( .63 instead of .81). So I think the power will be similar, but there will be less of it.


https://cimg2.ibsrv.net/gimg/www.rx8...c78ef2ad4a.jpg

That dyno chart has very little bearing on what will happen on your setup . The turbo on your setup wont be "maxed" at any point and it wasn't maxed on that setup either. How it will look is dependent on more factors than you realise.

Very little bearing? Same turbo, same tuner. Same engine! Please tell me what I'm missing.

Not the same engine (4 port vs 6) , not the same turbo (you changed the turbine housing) , not the same tune , not the same setup (despite what you may think).

If you have not worked on machines a lot I don't expect you to understand why things don't work out as you would expect . Take a look around this forum at results from Greddy kit installs . Same kit , vastly different results !

Thanks for the friendly advice.

The only point I was trying to make was that the dynos I have seen showed power dropping off after 7500. Since I changed the hot side for faster spool and less top end power, I was under the impression that I would have a similar, but smaller power curve.

Power dropping off at 7500 is common on 6 port turbo setups for a few reasons but it's not always the case . It's normally due to difficulty in controlling boost at that rpm .
Yes the hotside change will definitely bring spoolup 500rpm or so sooner and make it more responsive which is definitely what your setup will need.

Your installer/tuner has the skills so he should be able get the most out of what you have there and give you something with reasonable performance.

Whomever thought they were being cute by tagging my thread "op is gonna get ripped off" and "incoming fail" can GTFO. I have been very polite and patient with the 4AT trash talk, people telling me to sell the car, the personal attacks on my builder, and the crap about my choice of parts. The only thing that matters is this my car, my decisions, and several thousand dollars of my money.

I will say it again: you don't like high power automatic cars? Don't read the thread. Don't agree with my choice of builder? Don't read the thread. Don't like Interceptor?Don't read the thread.

This is not directed at all of you. Some of you have managed to question my decisions, correct me when I'm wrong, and provide constructive criticism, all without being rude, condescending, or arrogant. You have been invaluable, and I appreciate every minute that you take out of your day to help me. The helpful folks around here make this club great, and I wish to one day learn as much as them.

The car arrives at the shop tomorrow, Monday, and the real work can begin.

Personally I look forward to seeing the results, good or bad. I don't think anyone likes the Interceptor, it's failure as a product is well documented here. But that doesn't mean we shouldn't read your thread just because some of us think you are making some poor decisions. It's just opinions man, don't be such a baby about it, just do your thing.

you forgot one:

don't like opinions, don't start a public thread

Interceptor has known issues. The Adaptronic is much better suited for the application due to all the extra features. Even it's not perfect, but better just the same. It's not personal.

However, I did state my opinion a bit too bluntly to start, but edited it (but before you posted above) realizing such after reading it later. Just the same, sorry if you got rubbed the wrong way.

I have no idea who's tagging that stuff, but taking it too personal and going overboard on responding like that is probably what they're looking for ... :dunno:

if you think that's bad go to advanced search and start typing in MazdaManiac for searching a user name, lol