did a few pulls tonight...

[j-z]

yeah so i was bored and went for a lil cruise not to long ago. just normal easy driving the whole way. then i cut a left on a perfectly straight road about amile long with no cars insight. rolling in second gear and punch it to the floor from about 3000 rpms. instantly takes off and the wg opens within a second from opening her up. man that fuker is ridiculously loud. tial 38 mm open dump towards the ground out of a tube. i really wish i could divert it into my downpipe as its mega earpiercing. anyways to the good stuff... she had a good strong pull and put me into the back of my seat. up towards the higher revs i could tell it was hitting a rich spot and i could feel a loss in power and thats when i let off. went back to the peak and hold setting on the afc and ended up revving her out to 5200 and the air flow was at %89.1 @ a solid 5 psi. so what does that equate to? like 220 to the wheels or so? not bad for 5 psi and not even tuned. i got 90 miles on her now and she deserved some craming into the cylinders. im gonna lay off until i get her tuned. i also did a pull from 3rd. felt a rich spot and let off, but it got up there quick. anyone know what %89.1 equates to?

[KATwo40]

You can't really go by that. It's too "loose" to be able to tell.

I can tell you that 5psi doesn't get you 220whp, probably more like around 205ish whp.

You should look at voltage if you're trying to determine if you're MAF is maxing out, or at least near max. My stock MAF % readout never changed between 8psi on a TD04H-13C (smaller than a T25) and 8-9psi on the T04E .50 trim. And the T04E @ 8psi is probably somewhere around 230-240whp (maybe less on my old tired engine).

[1WheelWonder]

Which maf are you using, because with a z32 there is a formula that will get you close to your rear wheel horse power.

And that formula would be your airflow% 57% x 550 =313.50I hit 57% on a regular basis at 15psi on my old setup (GTIR t28 and z32 maf) I also dynoed a filthy rich 287rwhp on the stock maf at 13psi, so I would say it's fairly accurate.

[j-z]

i forgot to add im on the stock maf right now. do you know the formula for that? whats the 550 number in the z32 formula? mostly every 8 psi dyno ive seen with a to4e is 250 whp.

[1WheelWonder]

I don't know of a formula for the stock maf, and what the 550 is I have no idea, I had read a thread on another forum that shall not be named (I'm not a member nor do I plan to be) that discussed this same topic and someone mentioned this formula which when applied to everyones rwhp ratings that posted in that thread was close to there numbers.

[frsh13]

rolling in second gear and punch it to the floor from about 3000 rpms. instantly takes off and the wg opens within a second from opening her up. man that fuker is ridiculously loud. tial 38 mm open dump towards the ground out of a tube. i really wish i could divert it into my downpipe as its mega earpiercing.

Same thing for me... as soon as the wg opens the shi* gets louuuud

[GEO]

wait intill you open the WG up next to a car... lol.... whatttt, I can't hear, for dayyys

[KATwo40]

That's very odd. My 38mm wastegate is open dump and isn't that loud. I have a tube that runs along side the downpipe and dumps under the driver compartment.

[j-z]

LOL yeah when i still had my lude i had a open dump pointing striahgt towards the ground in front of the LF tire. it was a 35 mm, but i do remember boosting pass this van with the windows down.... bad idea! i instantly deffend myself. ^^ is your wg pointing straight down to the ground, or running parallel with the ground?

[Florida240sx]

Mine is loud I love drivign on the freeway next to those concrete barriers....I'm at 260miles on my engine, and can't resist anymore. I've been playing with her everyday. Today I leaned her out a bit. got tired of 10 a/f ratio no she is in the high 11's but for some reason I go lean after 6300 rpms..... It's like enthalpy forgot to tune it.....

[KATwo40]

My wastegate is at about a 40* angle to the ground, just past the transmission bellhousing.

Don't get me wrong, when that 38mm gate opens, you can hear it for sure, but it's not obscenely loud or anything. In fact, most people that ride in my car can't get over how quiet it is with the 3" turboback exhaust and open dump.

Flordia: Is your fuel pump hardwired? If not, do that before anything else and then check your AFR's.

[DammitBobby]

Dam I don`t think I have 50 miles on mine and tonight I let her boost to 15psi:) Yesterday I blew my IC pipe off and the way back home blew my radiator lower hose off:( I data logged it with the Zeitronix and the AFR doesn`t look to bad. I am rather supprised the JWT ECU 72lbs is working better now then with the stock motor.

[j-z]

^^LOL hellz yeah! i just hooked up my apexi ITC this morning and it works like a charm. of course i had to go out and boost it a little bit tonight which i just got done doing. runs really good beside the fact the wg is waaaaay fuking loud. tonight i revved her out to 5700 and the afc reached %98.x. at %100 will that mean im maxing out my maf? im ready to put my 15 psi spring in my tial and put a z32 maf on to go get her tuned at titan.

[j-z]

one more thing... while in boost my egt gauge reads a steady 1600F. my probe is right before the turbo inlet, and inbetween the first two runners on my jgs mani. sound normal? i added a little bit of fuel just to be on the safe side. im using numbers that i got from slick rick as hes running pretty much the exact setup i am, and he street tuned his with a wideband.

[SeVa-S13]

100% does equal maxed out. (duh, ha)You most certainly will need an upgraded MAFS for 15psi.

[KATwo40]

You guys may not believe what I already said on this, but you really need to view the MAF voltage, rather than the % readout. It's not 100% accurate for determining MAF usage.

If the MAF is reaching 5.11v, it's maxed out.

[DammitBobby]

Yeah that dam open wastegate is LOUD! I had somebody fab mine up and he did it so that if I want I can install a muffler on it. I think I will end up getting him to install one for me. Does sound like your at a drift event!

[j-z]

ok, so the sensor check screen on the afc should show that right? i know one sensor is for the tps, one for the maf (i think), and another for something which i dont know. i already said im gonna get a z32 maf. i actually have one, but i think its bad and some fuker on here sold it to me for $140! btw, good call on the muffler for the wg. i remember seeing that a few years ago, but forgot about it. im gonna take a looksy at some lawnmower mufflers. are 1600f egts heard of in full boost? i know i cant really go by it until i find out my a/f via wideband on the dyno.

[KATwo40]

Why add the weight and restriction of a muffler on the wg dump when you could route it back into the exhaust stream, making for less restriction (probably might gain some scavengine effect) and less weight and hassle?

Yes, the sensor check screen will show you the MAF voltage. Just use that. Even with the Z32, you still go by voltage. 5.11v is the limit, but the stock MAF needs less air to hit that mark.

[Florida240sx]

Where ot begin abotu what happened tonight...O yea started in my driveway lol....Floyds13 shows up ready to go eat and then go to a car meet. We pop our hoods and check our oil before laving MY house. As we shut the hoods a 96ish honda hatchback starts rollign by in fornt of my house and almost stops...He starts yelling at us....My driveway is 320ft long and has a gate....but is open from Floyds13 just pulling in....Back to checking oil, after I checked mine I cranked up the boost with my mbc.... Kid starts yelling at us I yell back and then he burns out....I jump in my car and chase him down 1.1miles at a red light which he is turning left onto a 4 lane road.... He turns to the inside lane and stomps on it before I even make the turn....I stomp and start looking at his passenger door...toss it in second and still spinning catch at abotu 5k rpm and take up to abotu 63-500 before shifting to 3rd where I let off throttl because I'm sitting beside them, I look over wave and say bye bye as I Floor it and hit 15psi....... After all the hell I've been through it was such a great feeling, I was pumped for 45minutes later.... At 15psi on my t3/t4 I had a airflow % of 41 41%x550=225.5 hp lol

[j-z]

LOL lets play bag the ricer! theres no way that formula is right. you should be 300+ whp @15 psi. also about the muffler on the wg dump, it would be TONS easier to just screw a lawnmower muffler on than to route into my downpipe. if it causes creeping issues i can just take it off. ive read plenty of stories about people routing their wg back into their downpipe and it causing boost creep. ive seen straight through mufflers before. im like mcgyver, i can make anything work out of nothing = i can rig some pretty cool shlt up. also kinda confused on what you were saying about the maf voltage as well. so both mafs max out at 5.11v? do you happen to know what the other sensor is on the check screen? tps, maf, and ?

[Florida240sx]

Yea the formula went out the window for my setup.... oo the track is open tomorrow night.... want to go??? call if so 386-747-9982

[turbo2nr]

damm you turbo guys and your open waste gates....

i need some boost too....

[Florida240sx]

I love hearing my wastegate scream...Thinking of going open downpipe too Love being loud.....15psi+open wastegate+ open downpipe= NO1 sleeps tonight Was funny my car at 15psi was quiter than the honda with fart can.... Mine was loud but low rumble to it....evil sounding....perfect

[PapaSmurf2k3]

congratz everyone.. happy boosting through-out the land

[DammitBobby]

After all the hell I've been through it was such a great feeling, I was pumped for 45minutes later....

Yea I need to get some of my frustration out too! I think there are more mustangs running around here then ricers. Why go for the rice when you can have a V8:)

[KATwo40]

j-z:

Yes, whichever MAF you use (Stock, Z32, Cobra, SR, Supra), they all use the 5v reference. The difference is how each MAF sensor "breaks up" the 5v (resolution).

The stock MAF uses fewer increments to reach 5.11v. The Z32 has a much larger barrel and requires more air to achieve the same 5.11v, and the resolution is more fine than the stock MAF.

I can't remember what the other sensor is, I'd have to go to the screen and look. I haven't been to that screen in quite some time now. Seems like it was knock voltage...

[j-z]

ok i gotcha now. i kinda had a feeling about what you were talking about, but now its totally cleared up. safc1 doesnt monitor knock so i dont think its that. im sure i could figure it out just by looking at it, but i didnt feel like going out to my car last night just to do that. and YES, happy boosting to all my niggas

[Bosrudorfer]

punch it to the floor from about 3000 rpms.... not bad for 5 psi and not even tuned....get her tuned

Your going to blow your motor man

[Florida240sx]

Need to have it on a wideband....Soemthing could be wrong and you could be super lean. For some reaosn I lean out right before redline.... So I had to add fuel