slash128

Lol, what? That's funny.

slash128

With no boost controller I really only have peak boost of 17psi around 7K. But by 5K is say I'm around 10psi, depending on how low I start the run. Wish I could log boost.

EDIT: looking at a recent video, a few tune iterations back, boost was 5psi @ 5K, 11psi @ 6K, 13psi @ 7K, 15psi @ 7.5K and 14psi @ 8K. I believe the boost gauge lags a bit because the AFR gauge definitely lags compared to logged AFR vs RPM. Now, after a few more tune iterations which has me peaking at 17psi, the boost is probably in the 7-8psi range @ 5K. It is all guesstimate since I don't currently have a way to log.

slash128

It was a Dynocom.

slash128

Probably is a bit optimistic. I was doing some research on Dynocom and seems they tend to be a tad generous. Regardless, it would have to be extremely generous for real power to be a let down

A few things that perhaps contributed to the actual dyno being higher than VD: VD only accounts for wheel height, not width. I'm running 275s on the rear. Bigger contact patch. Fresh tranny and diff oil change. I was surprised how much different it felt after the change. Fresh coils (OEM from eBay), plugs(stock trailing, gapped to 0.030", FD trailing in the leading) and wires (NGK). AFR was a bit leaner on the dyno, reading at the tailpipe, so not sure how much leaner. Added up these things could have contributed quite a bit.

9krpmrx8

iTrader: (46)

Yeah even if it is as generous as the dynos in NZ it is still impressive

slash128

LOL ouch

halimsteven

Itnis a nice number..so what would be ur boost for everyday drive? Did u say that u didn't use boost controller?

slash128

Correct, no boost controller. I had a TorboSX HP MBC, but found I got better performance with just 15lbs of spring and no BC. I am leaving it where it is for daily, don't feel like swapping springs. Technically I do have a boost controller, the gas pedal. I just go easy for the most part, then punch it when I want to put a smile on my face

blackenedwings

17 psi on low octane with a Renesis at max MAF and you aren't logging boost? What's the running pool on the life expectancy of this engine? Do we vote in miles, days, or hours?

slash128

Meh, I've said before if she blows it will give me something to tinker with over the winter If I'm not stressed about it I don't see why others should be, not their $$$... Additional gauges and logging capability will likely come over time. Besides, it's not like I run around town all day at 17psi. For the most part it is driven like an N/A car...

I like to experiment and it seems to have paid off...

9krpmrx8

iTrader: (46)

It's just hard for people to accept that you are making this kind of power on this setup and have not grenaded your engine. Only time will tell and I agree, if you drive a turbo RX-8 and are scared of an engine rebuild then you should probably buy an EVO or something else.

yomomspimp06

I see what you did there 9k

Posted From RX8Club.com Android App

blackenedwings

I will be flabbergasted if the engine doesn't go up like Chernobyl in an extremely short period of time, but slash is right, its not my $$$ and I couldn't care less how someone chooses to spend theirs. People think I'm crazy too for the money I have in my track car.

I also agree 9k, if you drive a turbo RX-8, you should be prepared for a motor replacement. I had a spare motor "on deck" when I had my turbo RX-8, but fortunately never needed it before I sold the car.

Edit: Also I'd agree, an Evo is an excellent choice.

slash128

I will say I do appreciate the concern and suggestions. No sarcasm intended.

blackenedwings

Yup, and my previous compliment on the power numbers was meant with no sarcasm as well. Despite what some people may think, I still have a soft spot in my heart for RX-8s. I found a platform that speaks to me more, but I definitely wish you the best with your car.

slash128

Thanks man!

slash128

@ blackenedwings: At one point your tag line was "Life begins @ 10 psi" and this was my inspiration for cranking up the boost, so thank you I know it now says 30 psi, but I won't be going there with my RX8!

Brettus

iTrader: (2)

The original dyno I was using was definitely optimistic . After finding this out I went to a dyno that my engine builder recommended as being more realistic.
The numbers I got on this dyno were down (in real terms)on what I achieved on the local (optimistic) dyno. If I dynoed on my local one I have no doubt I'd be up close to 400.
However, I'll hang my hat on 350+whp for my setup all day everyday .

FazdaRX_8

iTrader: (1)

have you guys thought to consider that maybe the renesis isn't completely at fault? but rather poor tuning theory?

I think we have made more progress now that certain members have quite leading us astray while others are encouraging.

Brettus

iTrader: (2)

I don't think we will ever achieve what the rx7 guys do . You only have to look at their exhaust ports to see why we have such a big handicap . But yeah ... I think there is an element of truth in that statement.

slash128

Looks like everything except the hi-res cockpit video has finished uploading. It's 1G in size, could still be awhile. There is a lo-res version. You can view it with VLC player. It's all I'm the Dyno Day folder here:

https://drive.google.com/folderview?...nc&usp=sharing

EDIT: fixed link, let me know if there are any other problems...

blackenedwings

Haha, rock on man! I'm a boost junkie for sure. I am going to be running at NJMP Thunderbolt in a week, and its looking like I won't have enough competition in TT2 for tire contingency, so I may run TTU with my 500+ whp TT1 tune.

TeamRX8

iTrader: (25)

D.I.Y. MAF Extender - Focus Fanatics

yomomspimp06

^very interesting...

slash128

Please don't tempt me lol!