Comitatus

iTrader: (7)

Sure do...

Motor is a BDC Spec C HBP.

I'm running a LinderPowerSystems custom exhaust manifold. Fully divided equal length runners with dual 38mm Tial Wastegates.

These aren't exact numbers for now. I would have to make some datalogs to get you exacts.
I see boost as little as 2500-3000 rpms, and full boost (12psi) by 3.5k rpms. There is no lag. When I run high boost, I hit 18psi around the 4k rpm range. My car pulls all the way till 8200rpm (rev limiter).

Took my car to the track for the first time a couple weeks ago, made 4 runs...first ones of my life.

1st and 4th pass was 14.1 @ 110, and 14.2 @ 110 respectively

2nd pass was a 12.9 @ 117 w/ 2.1 60', and 4th and final pass was a 12.6 @ 116.9 w/ 2.1 60'.

Passes were on stock suspension, stock 16x7 wheels with Kumho Ecsta SPT's.

Boost controller read peak of 11psi on all 4 runs. Low boost w/ Pump gas.

I know I can hit times of 11.9ish with 120 traps on DR's the way the car sits right now.

Pics of my setup and dyno tuning can be found here:

http://bdc.cyberosity.com/v/ProjectCars/LukeWeber/

http://bdc.cyberosity.com/v/Tuning/Ohio_June06/

RacerXtreme7

iTrader: (2)

Ahhhhh the wonders of a divided manifold and turbine set up, best of both worlds (quick spoolup and top end power) . Half bridges deffinately speed up the boost production as well.

Comitatus is it fully tuned yet? Whats low load and crusing like? Has the annoying bucking and misfire/breakup been tuned out fully?

RacerXtreme7

iTrader: (2)

Handahater, if your running GARRETT turbine housings, switching them out shouldn't need anything at all. Your DP should bolt right in gathered you use the same V-band sets ups between the two different housings, so finding out which worked better for your application is nothing but maybe 1/2 hours worth of wrenching swapping those out.

~Mike..............

Zero R

iTrader: (1)

I wouldn't suggest a 1.32 A/r on the thing unless it is drag specific with a heavy breathing motor. You can ramp up your boost curve many different ways to take advantage of bigger turbine A/r's, but for the most part, people on here are just slapping X turbo kit with Y IC kit and porting their motors. Also remember that a 1.32 on a T6 is very different than a 1.32 on a T4. Ernie's seems just fine with a 1.01 @711whp, are you looking to do better than that? If so you can step up to a 1.15 you will not see much difference in response in the race to 200whp. But you will lose about 800rpm in the race to 400whp, and 1000rpm in the race to 600whp. At least from what I've seen with all things being equal. The other thing to remember is it does no good to run a huge turbine A/r if your running out of compressor.

-S-

Turblown

iTrader: (12)

You are going to be the only one whose going to be able to choice the right housing. No one else knows how the engine was built, tuned, the rest of your setup etc. Just instrument the car, and swap housings around. Simple.

RICE RACING

I am making my own kit for the FD now, when I finish the pics and results will be posted

The testing and research thus far indicates, more power, more responce, far less restriction, more efficient engine package. The biggest reason people dont do it is because they think you need to run a tubular header and because there is no space for such a system it does nto get used.

Part of it is focused on road racing environment to place the turbocharger as low and as far back as is possible in chassis, and with what i have learned over various cars that decreased pipe/manifold restriction and retention of heat is vastly more important to making power than any arbitrary fixed length of pipe to the turbine.

We will see with end result if I am barking up the right tree

dougiepants

great thread so far

hondahater

iTrader: (2)

yeah one of these days I'm going to be able to tune my own car and when that happens I'm going to love changing things out and making my own choices instead of being like I've got one chance to get this car tuned and I have to drive 7 hours to get there so I have to do it all at once. Anyone feel like giving tuning lessons for microtech

thanks for the input and yeah your right, thats why I'm just going to keep the 1.32 for for my 80mm turbo when I go that big. For right now with my t70 I'll just stick with the .96. I think what I'm going to do is just make my car how it is and run it. Get to be the best driver I possibly can with it and once I don't see any more potential in my turbo setup then I will move to a better manifold, turbo, bigger exhaust etc... After all why go with crazy horse power if you still haven't had all that much track time? I think this will be smarter anyways as I'm not really looking to kill myself anytime soon Thanks again.

Thats what I was thinking about doing, thats why I thought I would just try it out while I was tuning it but then I noticed that the guy that sold it said it's a 3.25" and my .96 has a 3" vband flange so I guess this one will sit around for a while.


Nice setup there man. I wonder the BDC Spec C HBP is? I've got or am getting a bdc hbp built right now so maybe it's around the same as yours? One day I will get the tubular manifold but right now I'm going to stick with my log style.....Of course it's an ssautocrap that I desided I wanted to try and make a little better by ceramic coating it. I may be switching to a better manifold sooner than later, lol. Are you running any sort of alky injection?

antnicuk

What turbo and housing sizes are you running?

Comitatus

iTrader: (7)

I would say both maps are 90% right now as they sit. They were both 100% but then I cracked a rear housing...and things seem to be a hair off from what it was.
But that will all be fixed shortly.

The car is freaking strong on low boost, which is plenty for me cruising around on the street, but its always nice to have the option to crank it up and eat 99% of the cars out there. Not to mention surprising everyone at the track.

The bucking on decel was tuned out before but needs to be dialed in again...I have a bit in the higher gears. The car is completely streetable and comfortable to drive right now. Low load cruises nicely...my lightweight flywheel doesn't help much around town, but all it takes is a downshift, and I'm fine, not much to complain about there.

The misfire/breakup is still somewhat of a mystery, but I am taking care of all the base fixes for that and will go from there. I honestly think its from being a bit rich...as my race plugs were close to black after I pulled them on 2 days use. I'm adding a MSD to help alleviate not wanting to fire the rich AFRs. Minor things are usually all in the details.

Comitatus

iTrader: (7)

Thanks! He just has a couple different versions of his cuts on the housings, mainly from progressing and coming up with better designs over the years. His Spec C is from what I remember a fairly mild cut. Maybe he can chime in and explain it all for you.

I would definitely recommend going the divided tubular manifold route in the future if you can. You WON'T be disappointed.

Funny you mention AI. It's not on my car now, but its in the mail...

Comitatus

iTrader: (7)

here ya go...

antnicuk

so my large streetport with a 1.15 on a P trim should be ok.

dougiepants

Yes

hondahater

iTrader: (2)

Yeah I hear ya, It's just I would like to find a manifold and still keep my arm and leg if you know what I'm talking about. It's incredible how these manifolds are more expensive than a whole exhaust system. Anyways as soon as I find one I will change it and go to a devided setup. Good luck with your ai system

Comitatus

iTrader: (7)

Yeah I know what you mean. There is always a price

Hit up Justin Linder. www.linderpowersystems.com
He can build you a manifold just like mine, and is very reasonable. Tell him I sent ya!

Thanks...fingers crossed and praying to the rotary gods.

dubulup

+1
ahemmm...
two things you'll regret.

1 - Not using the right parts with the right parts (i.e. turbine housing w/ manifold) and...
2 - Finding out what a propperly designed manifold would allow your big turbo to do.


(and if you haven't already...one thing I regreted on my last set-up was lack of preturbo EGT. Like most corrections I make, I went overboard...I now have dual pre-turbo EGT and run one EGT thru a translator and log it with Haltech; so I can now see AIT, timing, fuel, WB A:F, and EGT in every tuning cell. Then I have a final EGT at the end of the DP so I can monitor temps going into my cat...when equip'd on the street.)

hondahater

iTrader: (2)

I know your right, I think I'm just ready to get this thing on the road to see what it can do but of course if I don't like it and I have to change the manifold and turbine housing then I'm going to have to change the downpipe and probably go with a 3.5 to 4" exhaust system. I do have a bung welded onto my rear runner of my manifold so I can at least see how hot the rear (hottest) rotor is getting. This is logged with my zeitronix wb as well as boost, rpm and wideband o2 readings. I may just use one of those translator's ( I think we are talking about the same thing) to datalog to my microtech. So where are you guys getting these devided manifolds from? I'm going to try comitatus's recomendation as far as getting a price (thanks again for the link) but still wouldn't mind hearing other ideas as well. Again your right........I just had to pay 2700 bucks today for rent on my shop so my budget is on hold for a little while, lol.

dubulup

You are the only other RX-7 I know running a Zeitronix...I like my unit. But I didn't like using two laptops for tuning. I could never get the Haltech and Zeitronix comms to play nice...so I decided to integrate everything into one...and since Haltech already logs RPM and Boost...plus AIT, engine temp, timing, inj ms, volt, etc. it was a no brainer. I've been able to actually tune running solo...make a run/log...make adjustments...rince and repeat. I also have the monitor which is good to keep an eye on as well...but doesn't beat a log.

hondahater

iTrader: (2)

Ahhh one of the benifits of microtech. I love windows based software I just use com port 1 for the microtech and then a usb to serial adapter for the zietronix. Works like a charm and is very easy to go back and forth between the two softwares however I do like the idea of having everything with one unit. My microtech is off getting a 4 bar map sensor put in it right now and while it was there I had th option to uprade the mt to log wideband however it was 250 plus the cost of getting another wb 02 sensor because I would have sold the zeitronix at that point and this was after I had already bought all the stuff to log everything with the zeitronix and before I had seen there was a translator to log egt's on a standalone. Timing and me never really got along very well, lol.