i have all my mods listed below in my sig... I dynoed today onthe stock S4 turbo. 260 rwhp / 282 rwtq @ 14psi, then my boost dropped to 10psi after 5,000rpm. Its still really rich but i couldnt tunn anymore because i had a problem with my fuel pump not wanting to work sometimes so i didnt want to take the risk of blowing the motor. So ill hopfully get that problem resolved and then back to dyno. I want to achieve 280-290 rwhp with the stock S4 turbo. I know it wont last too long, but im not boost crazy plus its not my everyday driver. and yes it leaks oil!!! not THAT badly though

 

btw, wondering if people achieved 300rwhp or more with the stock S4?

 

oh i dont have pics of the dyno sheet yet but i will post it as soon as i can

 

Thats a lot of torque, good job.
-Ben

 

Wow, that sounds great. I want to see that dyno sheet.

Tim

 

ok here the link. If it dosent work then just copy and past it

http://hostingprod.com/@sandorsrx7.c...?1061100605493

 

i also have the A/F graph below the dyno graph on the web page

 

maybe you have the 3800 hesistation.......just at about 3800 you lost power or your secondaries are not kicking in properly

 

well that thing with that.. i think its the fuel pump, cause i have it re-wired so the pump is at 10 volts crunsing and then it kicks up to 14volts , and also the secondarys kick in as well... could this be it?

 

You'll always get that when using mismatched primary and secondary injectors and an S-AFC. The S-AFC is not sophisticated enough to smooth out the transition.

Looking at the A/F graph though, I'd say the settings at that area are way out, and the transistion could be improved.

 

i also have a chart here i made, my FC with the stock single vs my friends FD with the stock Twins... My goal was to have it spool just as fast, and make as much power as the FD does at low end.....

http://hostingprod.com/@sandorsrx7.c...?1061108219001

 

Wow, those are great numbers. Once I get my replacement used S4 turbo in and dyno I would freaking love to see those numbers!

I've even got a streetport ontop so I might get lucky and hit the big 300!

 

oops.

 

Are you using the stock wastegate? Also, do you think your intercooler could be whats causing the pressure to drop? (Im not sure the s4 turbo can flow enough air). But anyway, very nice indeed. Hopefully my car will reach the same glory as yours.

 

I"m pretty sure the turbo can't flow enough air.

I'd love to see what that runs in the 1/4 mile. Just to see the faces on some people when it runs a 12.9 Cause everyone says it's not possible...

 

ya the Ic is WAY too big for the stock turbo... it does have a good amount of pressure drop. Im sure the turbo sees well over 18psi. I actually want to check it by putting another boost gauge right into the ic pipe coming out fo the turbo for hahas and giggles just to see. As soon as i tunn out the A/F more i am def going to go do 1/4. My goal was high 12's so ill see. Ill try my hardest

 

Ya stock wastegate (ported)

 

Its a GReddy...I dont think pressure drop would be that much...

I think boost falls of because its a stock turbo. ALmost everybody has that problem. Boost will start falling for me at ~6k.

 

Make us stock turbo and stock ECU owners proud(not to mention 10th ani owners)!

 

ya def adam... The stock is just not big enough to boost and make power high end at this psi. Now i was going to get a full t4, but now since i got the feel of how this bastard spools so freaking fast, i dont think i want a full t4 anymore. I want to keep the spool time the same, and try to get a little bit more top power. Im thinking BNR?? send my stocker out, clipp the wheels, get t4 compresor? Anyone have a setup like this? Or running a BNR or similar turob?

 

Lags not as bad as you think it is. I have two friends with two turbo Miatas ( Ones running a TD04H-15G, the other is running a T3/T4 ), and while they both have some lag, the power they make once it gets into boost is well worth it.

Plus, if you really think about it, the only time youre gonna worry about lag the initial slam on the gas to WOT. After that, youre spooled up and good to go.

 

Got a question, what sorta water temps(on the stock gauge) do you see on the highway with your fmic? Are you still using the stock clutch fan? I have the H34 BOV too, how many washers did you end up using? Are you routing it back into the intake?

 

dude your primary injectors are too small. you are maxing them out at 3000. from 3000-3800 you are WAY to lean. that is why you are making the torque there. leaner = more power but the engine wont' last too long like that.

at 3800 the A/F instantly drops back down when your secondarys kick in.

the boost drop is pretty normal. the stock turbo is too small.

do you have an intake / TID? not in your sig. that will help a bit. rebuilding the turbo might too.

 

Yep. 14:1 a/f ratios are scary. Time for some 720 primaries

Have you messed with your timing at all?

 

ya i got the TID 3" intake... Actually my stock TID wouldnt let me go past 9psi, it was too restrivtive... Ya i am getting 720 primaries asap. I noticed that myself on the dyno, how it was kinda too high around 3000 mark...

Jason.... Ya i got a after market water temp. I see around 205 on street, 185 on highway. Got stock clucth fan as well. 6 washers in the bov... hope thst helps.