philodox

I'm not even going to bother anymore.. if you've never put a car on a dyno, you wouldn't know that stressing the engine at a higher gear has a very good chance of detonation... someone else want to take a stab at this?

Also, the dyno takes into account the gear you are in when it figures out whp.

therm8

I don't know much about gear ratio vs. engine loading, but I've always read/been told that you dyno in a gear as close to 1:1 as you can as well.


FWIW

Gomez

Not really, I've seen Hymee's in action. It's awesome on a full laptop screen. The gauges are spot-on full replicas of RX-8 instruments, something to behold. Much easier to interpret, too.....

Broke_Apex_Seal

I think the greddy kit with race gas and 10-13 psi could get you close to 300 whp w/o blowing up the motor.


As for dyno tune when I worked for PFS we would dyno tune to get it as close as possible but then hit the street for the last bit of tuning. It makes a little more on the street but nothing drastic.

Kooldino

I got mine new off of ebay and saved a few bucks. As far as I'm concerned, anyone doing serious power mods (on an OBD-II car) should have one.

Kooldino

I honestly forget whether it does AFR or not, since I have a WBO2. As far as I'm concerned, a NBO2 is only useful for N/A tuning.

Kooldino

That may be true, but who says you're reaching 100% load in less than 5th gear? Many cars run a tad more boost in 5th gear...thre's a reason for that.

RX8-TX

The RX-8 comes with a WBO2 sensor...several CANScan tools out there make use of it (Harrison's R&D is one of them...) - Besides, remember that the interface with the RX-8 is using CAN protocol.

smrx8

iTrader: (1)

what did you search under i trying to get one myself ???

burnoutking999

why would low psi have an effect. lowering air temp like that should be a horsepower gain regardless right? i have seen it advertised as 50-60hp gains. this is douptful for the 8 but it should still be a hp boost of some signifigance i would think.

burnoutking999

so given the numbers on the dynos, the n-tercooler kit could bump up some more toward that 300rwhp number if advertizements are near truth-full. any one given thought to this and going to try it? i would like to see what that would do on top of the turbo kit

MazdaManiac

iTrader: (3)

The "N-Tercooler" would only be useful if the IC wasn't so efficient and the boost was turned up out of the efficiency range of the turbo itself.
It won't yield much if any increase in power by itself.

Richard Paul

iTrader: (5)

OK Jon, At least let it be me to put you in the lead.
May TSi TSi Flies nest in your arm pits. :p :p

philodox

lol.. thanks Richard.. May Black Palm be embedded in your fingers as well :p For those of you that don't know what Black Palm is, it's the "national" tree of the country of Panama.. nasty stuff

MazdaManiac

iTrader: (3)

philodox

Well Guys.. rx8-tx just did me a favor and plotted the torque curve based on my whp and mph of my dyno chart. Here's the results for that

193.44ft-lbs @ 4643rpm was the max according to his calculations

190'ish torque was availible starting at about 3100rpm al the way up to about 7000rpm. So now you know what I meant when I said it had a bit more kick to it at launch.. no wonder I can go sideways in 1st-4th gears if I try

PoLaK

iTrader: (1)

John your right about dynoing in 3rd/4th rather then 5th.

In addition to the extra load put on the engine and greater chance of pinging since you don't have the correct volume of air flowing at 100mph through the intake. I would seriously worry about oil temps doing consectutive runs in 5th gear, also the wheelspeed is so high (140+) that there is greater room for error on the acutal horse power figure, you can see this by how much spikier the graph of a 4th gear dyno is then a 3rd.

philodox

Thanks Mark.. finally.. someone steps up to watch my back

RX3+5

The load on the engine in fifth gear is tremendous and requires allot of air going through the radiators. Don't do it unless you like the smell of coolant!

The RPM pickup on Dynojets gets funky from dropping. A new pickup solves the problem for a while...

Nice HP gains! Thanks for sharing!

Vince

Kenco

I agree

I've always dyno'd in 3rd gear on a 5-sp car before!

I presume they are torque figures @ the wheels, if so, I find that very impressive....

The sooner they do a kit for the UK the better!!!!!!!!!!!

dmp

I wonder why the load on the car is so damaging to an RX8? Every other car i've owned has been dyno'd at 1:1 ratios...I think ppl are just afraid...if our 1:1 gear was named 'fourth' I doube there'd be any debate.

therm8

Non Dyno related question: Did the kit come with injectors? I only ask, because the Re Amemiya kit (which is also a Greddy/Trust kit ) comes with 2 "main injectors". I'm not paying the $5k+ for the kit, but was just looking (since it's the only thing available for the 4port motor). Just curious if the 4 port has different injectors than the 6 port?

MazdaManiac

iTrader: (3)

The 4-AT only has two injectors per rotor. The 6-MT has three.
The additional injectors in the Amemiya kit may be replacements for the secondaries.

army_rx8

^^correct

(least what i read somewhere...can't find it now to save my life sorry :o )

r0tor

iTrader: (1)

umm, no - airflow through the engine is a function of throttle position and rpm