280rwhp@9lbs of boost, stock turbo,stock ecu

[Judge Ito]

Originally Posted by RETed

"Most people" would have a hard time getting the stock turbo to push anything past 240 - 250hp at the wheels, even on a DynoJet.
What we're dealing with here is a lot of hush-hush stuff that the OP isn't willing to give all the nitty gritty details to at this point in time.
Even I have my doubts on how a "stock turbo" + "stock ECU" is going to push an honest 280 at the wheels myself...
I was going to leave this alone and hopefully some useful hints might get posted, but it's starting to go in the wrong direction.

We don't know what kind of fuel this set-up is using, but it might be some "exotic" race fuel...
We don't know what kind of ignition timing this set-up is using, although advancing the ignition timing doesn't usually gain that much power, but I have a feeling we're not dealing with stock ignition timing settings.
We're not talking about some ultra high RPM range (over 9,000+ RPM's), so that's not it.
DynoJet #'s can be fudged to read high; so far the reputation of the dyno owner hasn't been questioned yet (but I'm sure it will be now) - the pic does show the run being "UNCORRECTED".
There's not talk about some kind of supplemental injection; the only thing mentioned is a larger fuel pump + larger secondaries.
(Hell, 50-shot nitrous anyone?)
I don't there was mention of the stock top-mount intercooler or if there was a front-mount intercooler installed?
An FMIC would explain a 10 - 20hp gain over the stock top-mount intercooler set-up.
How about custom A2W intercooler? Ice?
CO2 / LN2 / N2O sprayer on the intercooler core?
We don't know the boost graph over the entire run.
Unless the system was running a closed-loop (electronic) boost controller, stock turbos tend to run higher peak boost right before peak torque and then taper of toward redline - so is the "9psi" the max it managed to hit, or was it closer to redline?
We don't know ambients - temperature or humidity.
Dry day with close to freezing temps will increase power (over a humid and hot day).
The OP also hinted about vehicle weight - we don't know the weight of the vehicle + driver.
Most "full interior" FC's are going to weigh around 3,000 lbs.
It's possible to get the FC down to 2,800 lbs. with driver or even down to 2,600 lbs. pretty easily.
What about what kind of rear tires?
Slicks would definitely aid traction.
Drag radials? Maybe.
Street tires? Possibly.
Too much variables...

In my experience, the stock turbo is only good for 240 - 250hp at the wheels.
An FMIC might give you another 10hp on top of that.
Someone on here claims they hit 270.
We do know the inducer and exducer measurements of the stock turbo.
When we average the #'s out, it slots in around a big T3 and under a small T04.
The "280" @ "9psi" is more what a T04B "V-trim" would do, and that's way up the chart.
http://fc3spro.com/TECH/TURBO/tmodels.html

The pics of the clutch shows it was clearly destroyed and / or abused.
For a "3-puck" clutch disc to look like that, I want to know what it went through to end up like that.
Unless it was some inferior quality product (high doubtful), it would take a lot more than 300 lb-ft of torque to kill it unless it was abused (highly doubtful too).
I also question why even bother post a time slip from a run that you knew the clutch was slipping?
Maybe we just don't have the cajones like you do, but once I feel the clutch slipping, I call it a night and pack it up; the time slips get all throw in the trash.
I know you have a ton of drag racing experience, but I wonder why cause all this hubbub with a slipping clutch?


-Ted

TOP MOUNT original intercooler. I posted a dyno video of the pull. stock ignition componets.. STOCK MEANS STOCK. no exoctic fuel, average local gas station 93 octane. no CO2 / LN2 / N2O or anything else for that matter. reason I Posted some information on this car is simple, to show the potential with a very simple set up. this is NOT my car, this is my 18 year old kid's rx7 and she is the one currently driving the car with very little track time(she did not understand the clutch was screaming and did not lift). and so far she is on a good roll. also reason the clutch pics were shown is to keep informing that the 13.0 run was with clutch slippage and better times are to come..

the car held 9lbs of boost from 5500rmps up to the factory rev limiter. rear tires were mickey thompson DOT drag radials. ignition timing was factory -5 and -20 @ the 750 rpm idle. to be continue.

forgot to ADD stock series 5 ecu.. stock means STOCK. no rtek, apex afc, NADA MEANS NADA. i will add with the 850cc secondaries the car would lean out past 9psi. later on as we go, ill find a way to add more fuel past 9psi with some additional injection.

[Judge Ito]

Originally Posted by Mazdabater

And we are both flogging dead horses here I'll just shutup and wait for the results next time at the strip.

rain our way today, but the weekend looks good. to be continue

[Judge Ito]

Originally Posted by jacobcartmill

ITO, i'm not hating on you here, but all signs here point to "hybrid stock turbo."

looks like a BNR stage 1, or maybe a t04b v-trim fitted into the stock compressor housing.

to my knowledge is a stock series 5 turbo. here i have a picture of the ported engine installation. there you could see the factory turbo with factory compressor. that is my kid Sierra helping with the install.

[rx71king]

(quote)..In my experience, the stock turbo is only good for 240 - 250hp at the wheels ...i made 265 on a stock s5 turbo on a ported 12a block...12a turbo dyno.jpg....it is possible..good job Ito....

[Mazdabater]

Dyno sheets dont mean shit at the end of the day. I had one of the bigger rotary workshops give me a dyno sheet that read 450hp, it didnt feel like 450hp, turned out on another dyno to only make 313hp. You can fudge dyno figures. Known fact. Not saying it happened in this case but I'm saying the real world results > dyno numbers. So many rotors over here in aus have dyno sheets that read 450 - 500hp and still only trap 110mph down the strip. This is probably what makes me so skeptical of things these days.

[Judge Ito]

Originally Posted by Mazdabater

Dyno sheets dont mean shit at the end of the day. I had one of the bigger rotary workshops give me a dyno sheet that read 450hp, it didnt feel like 450hp, turned out on another dyno to only make 313hp. You can fudge dyno figures. Known fact. Not saying it happened in this case but I'm saying the real world results > dyno numbers. So many rotors over here in aus have dyno sheets that read 450 - 500hp and still only trap 110mph down the strip. This is probably what makes me so skeptical of things these days.

I see your point but I'm not in Australia, over the years I have posted 100% accurate dyno numbers on what ever rotary car I was working at the moment. never inflated or false numbers. no need for that. i'm on the hunt for real results. clutch on this rx7 is already fixed and waiting for the weekend.

[88turboii]

that does not sound like a stock turbo.. when i had my s5 turbo maxed out, it made 250whp, boost dropped from 9psi to 6psi by redline, running off stock wastegate spring. If turned up the boost, the torque curve would just get better.. peak power wouldnt budge at 250whp.

the fact you gained 10 hp by upping the boost to 10psi shows me your turbo is modified.. maybe something similar to a BNR stage 1, where it looks stock because the compressor housing is milled out for bigger wheel. or maybe your hot side wheel is melted or chipped, creating the affect of a clipped wheel. who knows

I like the simplicity of your mods. people think im crazy when i just tell them just to throw some bigger secondaries in, retard the CAS by 5 deg and have at it on the stock ecu. my brother's high-comp n/a is turbo'd using 720cc sec's, TII maf, and retarded CAS and its been running 6 psi for about a year now with no problems. this results in AFRs in the 11's in boost. it leans out up top, but its because he is still running stock fuel pump.

dont believe all the advice you see on the forums, most of the time its people just regurgitating what they have read and never tried themselves

[Judge Ito]

transmission had a 5th gear synchro broken and a few internal parts rattled up. fixed everything and took it for a drive, trans is behaving better and the new clutch is also reacting quicker. weather has been shitty so updates will be posted soon..

[Judge Ito]

Originally Posted by 88turboii

that does not sound like a stock turbo.. when i had my s5 turbo maxed out, it made 250whp, boost dropped from 9psi to 6psi by redline, running off stock wastegate spring. If turned up the boost, the torque curve would just get better.. peak power wouldnt budge at 250whp.

the fact you gained 10 hp by upping the boost to 10psi shows me your turbo is modified.. maybe something similar to a BNR stage 1, where it looks stock because the compressor housing is milled out for bigger wheel. or maybe your hot side wheel is melted or chipped, creating the affect of a clipped wheel. who knows

I like the simplicity of your mods. people think im crazy when i just tell them just to throw some bigger secondaries in, retard the CAS by 5 deg and have at it on the stock ecu. my brother's high-comp n/a is turbo'd using 720cc sec's, TII maf, and retarded CAS and its been running 6 psi for about a year now with no problems. this results in AFRs in the 11's in boost. it leans out up top, but its because he is still running stock fuel pump.

dont believe all the advice you see on the forums, most of the time its people just regurgitating what they have read and never tried themselves

I have another series 5 turbo at my shop and I took a good look at both of the turbos. the 1 on my kid's car and the other series 5 I have spare. I came to 1 conclusion, they are both B.S.T. turbo's BST= BONE STOCK TURBOS..

[Judge Ito]

Originally Posted by Mazdabater

And we are both flogging dead horses here I'll just shutup and wait for the results next time at the strip.

I told you to sit back relax and wait for results. she improves to 12.8@108.80mph on this run the car started to drift around the 1000ft mark and she pedaled it on and off(one tire had low tire pressure) and she pulled that time. rx7 has more in it. no clutch slippage at this time..

[Judge Ito]

Sierra just before her 12.8 run..

[RotorDad]

A little more seat time & she will be on her way to a mid 12 sec run.

[Judge Ito]

Originally Posted by RotorDad

A little more seat time & she will be on her way to a mid 12 sec run.

your correct..

[Mazdabater]

Well I stand corrected. Incredible results for a stock turbo.

[EJayCe996]

How freaky, she looks just like my sister when she was her age.