$2400...Not bad ! Maybe I will try for 12 psi after all

 

Really is up to you & your wallet. If you are thinking about maxing out at right around 280 whp (maybe 290-300 whp, because dammit I'm going to prove people wrong ! :D ) for about $4000-$5000 vs maybe getting to 320 whp (what Chuck said) with the T4 turbo kits but dropping in the $6000-$7000 range. Up to you is the power difference (280 whp vs. 320 whp) is worth the price difference (let's assume $2000).

Manuel,

Dyno was down last time I went to my mechanic. The time before I was running 232 whp with 6 psi (4 psi at the top end), but when I brought it back last time he found 2 big leaks (fix them) & also turned the boost up to 7.5 psi (6 psi on the top end). I am running heavy (i.e. bling) 19" rims, but am looking at around 240-250 whp (thinking about buying a set of ultralite 18"). Also had a C02 spray system installed. Sprays my intercooler with C02 cools it down big time. I'm am bringing it in to have a few other parts put in (& boost turned up to 8 psi) so I will dyno it then.

 

putting in a larger turbo will be touph with the greddy system. the location of the turbo really limits how big you can go from what ive seen.

also, the PTP is using a t4/t3 turbo. add that to a rotary engine that moves as much air as a 3.0 liter v6, you shouldnt experiance too much turbolag. if i were you, i would just wait for the ptp. it will be less of a struggle to reach your goals and only costs about $2000 more the greddy (IF they deliver).

hey FANMAN, who does your work? know anybody good out here in rancho cucamonga?

denward

 

I ll drop arrounf 270 at wheels minimum right now i hope...I ll let you know...
all the greddy extra are needed imo...

The only thing now is to update the map with mazdamaniac's or not???this is the question!!

Good luck mate..
But don't push the turbine hard arround 300whp is a good number but don't try to make it more..You ll probably lose whatever you have made so far...Buy a ssr turbo and you ll save some bucks!!

 

Fanman,

Basically you have all the parts that I had before my last upgrade,
It looks that you just needs to work on a better tuning..............

Keep working and you would find the extra HP..........

This is only a joke:

send you're car to Galdy, my mechanic
or pay him the air ticket!

Manuel

 

Works great. About what I thought would be the perfect RX8. Low/mid range has some pull now (vs. stock). I don't know anybody that far out. Everybody I know/have heard of (my mechanic, Tripoint, Rotary Reliability) are all out in the San Fernando Valley or Orange County.

 

Where's your heavy duty clutch hardhitter?

You need one of those unless you want to fry your stock one and maybe the maunal gear box too.

 

I just picked up the new issue of Import Tuner and it has our own Greddy RX-8 in the issue, however, on the back, it is a full page add for the RX-8 Greddy Turbo and it states the following specs

Stock HP - 202.2hp@8200
Greddy HP - 260.9@7800

Stock Tq - 125.7ft/lbs@5650
Greddy Tq - 176.3ft/lbs@5600

260.9hp seems to be a lot more than what all the other 8's on the forum is pushing, I have no idea if they added anything else or not, but is this what the turbo should be pushing?

If I could push near 300HP, I'd be happy, for those who have added the turbo on, can you feel the difference? I just want to be able to really feel the power difference to make sure that it was a well 4-5k spent.

 

The number isn't the same, but the gain roughly is. Finding a stock RX-8 to dyno over 200whp, or even much over 180whp, is not an easy task. That's why most people dyno with the GReddy at closer to 240 -- they're starting out 20whp less than GReddy's car supposedly did.

 

Yeah, that is true & usually the tq. figure is closer to 190 lb.-ft. of tq. That hp figure is impressive though.

HH, you will notice a substantial difference between an NA & a turbo RX8. Like I said, this is the way this car should have come. With the turbo I feel like I can own this car for years (Usually I switch cars every 2-3 ears) & be perfectly happy with. More balanced now. Great chassis, great power (now).

 

RX8PR

From what I see, you are running probably the highest rwhp to your 8 from the Greddy kit. Do you think I'd be able to run the same kind of power you are running?

I'm thinking of just spending the 4k for the turbo/install and then about $250 for the BOV and then from there slowly build up getting other components, boost controller, injectors, etc etc and hopefully slowly my power will gain.

How have you been able to reach that much power to your wheels, what components did you buy and how is everything holding up?

 

I maked 273 HP at the wheel (235 torque) with the greddy kit and a lot of tuning.......
on that time I also have SR pulleys, straight pipe, borla, no IGR, Flywheel & clutch, etc.

With this same setting or other settings you can make the same power, you just need a good TUNER and a good MECHANIC.

Now I have 850 cc injectors, boost controller, ECU (top secret), fuel pump and external wastegate and the car makes 305 HP at high boost......... we can make more HP with a bigger turbine, at high boost the greddy turbine it's out of the efficiency curve the air
is to hot and not all the cfm that you need to make higher HP gains.......

The next step is to install a bigger turbine I'm thinking on the garrett GT35/40R.

But first I need to sale my actual greddy kit, I have a guy interested in puerto Rico but

If any one is interested I'm asking $2,300 for the greddy kit including the HKS BOV and the external wastegate. Tell everyone!

Manuel

 

Slowly but surely you are getting there. GOOD LUCK!

 

Your car must feel like a rocket! :D

 

Feels and sounds really good but for our standards with rotary engines
is not finished yet...............


Manuel

 

[QUOTE=Fanman]Both the PTP & SSR/SFR kits are running T4 turbos. I think SSR or PTP have already commented that their power is more top end (and SSR even had a little bit of detonation problem on the top end).


Actually, this is incorrect.We had detonation with the onset of boost at a really low rpm.The problem was alleviated with the tuning we did.BTW, we have another RX-8 turbo up and running and should make it to the dyno this week.This car will easily exceed 300 @ the wheels at a modest 8 psi of boost. I am expectiing close to 325 @ the wheels. All turbo. Stock motor. Stay tuned.

 

Turbo Tim, how much does your kit cost? What is needed, etc etc. On the site you guys are asking around 7k. Is it 7k and you are done with everything or do you still need to purchase BOV, controller, etc etc

 

The power is there..........................................

My mechanic works on another RX-8 with the same settings than mine the only different is the turbine, I have the greddy and the other one has a GT35. He maked 392 HP at the wheel, stock motor..................
Now they're porting the engine!
This week he is busy working on a 3 genearation RX7 that he use for circuit race here in Puerto Rico. On a few weeks he would finish the RX8 porting job......

Sorry but If you're looking for 350 HP you need to spend more than $4K.......


Manuel

 

Yes I understand that, I'm just probably going to buy a turbo first and then slowly build the car up to more and more HP. I cannot do it all at once as I do not have the money to spend 7-8k at one time.

If my goal was to reach 300whp, would I be able to do that with the Greddy sooner or later? I am sure 300rwhp is going to be plenty of power for me and most cars.

I just want to be able to stay up with some modified STI's 350Z's S2k's, S4's etc when I need to. I know the 8 isn't made to be like the RX-7, but if I could spend the 4K now to buy/install the Greddy and then later down the line if I want am able to push 300rwhp with the Greddy kit, then I'm happy with that.

 

With the greddy kit you would be near 240-250 HP,
Next, find some more money and then, you would get more ponies.............

good luck!

Manuel

 

I think what he wants to know, is if he buys the Greddy kit, will he be able to get 300hp out of it down the road with more mods. The answer is yes, Manuel got 309 out of the Greddy, no reason you can't do the same. 300 is about the max though, then you need to either upgrade the compressor wheel or change turbos entirely.

I suspect, that the line of diminishing returns is around 280hp though. Meaning it should be real easy to get the Greddy to make around 280, and then require a significantly increased amount of money per horsepower beyond that. A full exhaust and boost controler, maybe injectors also should get you to 280. Although, since I haven't done it, this is pure speculation.

 

Someone in Greece pulled 290 with de-cat(midpipe no cat)greddy sp2 catback,ur pulleys and greddy turbo...magazine numbers which mag owns a great dyno here in Greece...........

 

Not to hijack a thread but I would say go ahead and load Jeff's map, I did and the car runs so much better than with the latest stock map from Greddy. I don't understand why, I am a newbie, but I know my 8 does not feel sick anymore, for a while i thought she was going to die. his map took care of that.

 

The only mods I have right now is RP high-flow cat and Greddy SP2 exhaust performance wise. And yes, I am basically asking, will I be able to pull around 300rwhp as a daily driver later down the line with the Greddy and after installing the Greddy Turbo with ~240HP, will it be able to stay up with some of the other modified cars out there

 

Yes, you will be able to pull 300rwhp (or very close) with the GReddy with enough work, tuning, and additional parts.

Will you be able to stay up with some of the other modified cars out there? Depends what car and what mods. That's a pretty wide-reaching statement.

After you get up to 300rwhp Will you beat a stock STi? More than likely. Will you beat a 350Z with a couple thousand in mods? Probably. Will you beat a 350Z with the same amount of money put into it as you have your car? Doubtful.

With just 240rwhp you wouldn't touch an STi, you'd beat a stock WRX, might beat one with $1000 in mods, and it'd be a driver's race against a lightly-modded 350Z, but only if he wasn't on slicks.