Why are you guys hell bent on using MAF signal? Because you still want to use the stock ECU?

 

nice setup man! i plan on buildin my motor for my pe tt kit as well. id be interested in the bolt on piping kit. also do you have a parts list to plumb the water lines to the turbo? i plan on doing this as well. THANKS!

 

If they can figure out to way, to properly scale the MAF signal/housing so it does not max out, then a MAF sensor is actually a very good way to tune an engine.

The problem becomes, that nobody currently manufacturers a MAF sensor that can measure 700-1000 crank HP with of airflow (that I am aware of). OEM's running massive power in supercars, typically utilize twin or quad throttle bodies, and multiple MAF sensors to measure airflow. But with a few workarounds, you could probably get one to read a nice 500whp or so without maxing. When you go with a massive housing, it can become difficult to control the car at low air velocities throught he MAF, such as idle and start.

I like where they are going with this...

 

Exactly the trouble with sensors...they're only linear over a particular range...

Getting a sensor to detect BOTH huge airflows as well as idle airflows is a big challenge...

Well it sure is interesting, but it definitely seems like MAP sensor would be much easier...

looking forward to results...

 

WOOTTTT...scaling of the MAF voltage is complete.. @ start, idle, mid range throttle (everything in between) and WOT. i.e no hesitations..... i been driving the car around a little today.. @9psi.. YESSS... man. feels good to drive the car again..the Greddy evott exhaust is very respectable sounding.. i was used to the RST-GT2 grunt, but i'm starting to like the quietness of the EVOTT..we're having trouble boosting higher than 9 (EVC5 issue??) we think it might be my stock cats or wastegate springs.. or something else... either way, im still glad the car is now stable and not dying or throwing CELs. the Cusco clutch.. when cold is very easy to drive, but as soon as it heats up...the shifts have to be much quicker ? i guess this is characteristic of a dual carbon? REVs really fast. which i like, but i have to get used to it.. injectors are working great. so for all you cheapos out there: JDM STI pinkies are a good option if u want to 550ccs...the throttle piping we made, Tadashi told me is good up to 1000CC injectors. haha. i doubt i'll ever want to go that high..

next up: new wastegate springs for 1bar boost love, slice n dice the ypipe to add a flex portions and maybe incorporate high-flow cats into the design?...

 

Hey Ches

Glad to see it's up and running.

Is your Cusco set up azs a 2-way or a 1.5-way. The latter won't clutch on decel, maybe that's what can cure your problem.

The PE1420, as the numbering implies, are spec'd at 14cubic meters/sec. Which is 494 CFM, or 34.05 lb/min. You are dead on. BTW, the APS TT turbos are spec'd at 35lb/min...so for allthose who think that our turbos are 'tiny' are flat wrong (because they spool up so well). They spool up because they are of a superior design to the Garretts, slightly more superior, not too much. It's time to make some power on these turbos.

 

Mwuahahhaah. fixed my boost problem: it was the stock cats?! arrrg.

ok. i am maxed out on the stock wastegate springs at 11.5psi.... but damn. car is now fast... woot..

my #5 wastegate springs arrived this afternoon, but i was plagued with the infamous dead-window-motor... which i have to fix now.. but yea.. hehehe. the new springs will go on and then my final tune for 1bar..

.. btw.. Gurgen, i'm set up on 1.5 way 60% lock.. so i think the noise is from the clutch..

 

Great Ches..


You gotta love the PE Turbos...... 11.5psi on 4.3 psi springs. I am only running the 7.5 psi springs, and I have not trouble boosting to 14-15psi.... No way the Garretts cuould do that...from what i have seen.

 

PE wastegate springs are now in, and boost is now above 14psi.. here comes the final tune and production run for the larger MAF pipe..

x your fingers...

 

best of luck cheston! My car is up and running too as of today!

 

Those PE TT are no joke! I am now boosting 12psi... Yeah on the stock Motor via FCON, 112 octane.. Wooot!

 

DOH... my fuel is maxxed out.. hm... i think it might be my prototype fuel pump.. just ordered a new walboro 255 HP to check to see if thats it.. my Fuel pressure is dropping at up redline so my AFR is going up to 11.8 @ >15psi ...

any suggestions other than buying / modifying stock fuel rails and getting new injectors?

 

how much HP are you currently at, how much HP do you want, and what is your current setup?

 

i wonder if anyone has tried the Cobra MAF. JWT and the older B series and S series guys used those with great success. Of course they had their ECU reprogrammed by JWT to make it happen but all in all great solution.

 

it was 550/550

i'm at like ~530rwhp and we think the fuel capacity is at its limit right now.. just stock fuel rail, SARD FRP, and JDI STI pink injectors..

 

i wouldnt push the stock lines and rail entry tube much further then that. if you decide to upgrade all your plumbing, ive got some used rails that i can send you cheap. you are approaching the max of the walbro 255 unless you eliminate every single restriction. i wouldnt bother trying another pump unless you have all custom plumbing.

 

sounds pretty quick.

 

All right.. Jan update. haha..

i got my car back from its final tune: 501rwhp/501ft-lb torque when scaled to Dynojet #s.. the dyno that Technosquare uses is from Superflow which induces load so the number are a little off.. i think the correction factor is like 15%... well anyhoo.. car feels great. 17psi (but then tapers off to 15 @ redline)... probably due to the test pipes being 2inches.. i tuned it pretty conservatively and i think i could have taken it a few more PSI more, but eh.. i wanted to play it safe when i'm on the track or whatever.

my original dyno was much higher but the fuel lines were the issue, we bored out the connectors to the fuel rails and the lines from the tank so i was backfiring before this final tune because the car was running so rich.. Tadashi remapped the ECU to compensate for the fuel and made my AFR perfect!!AFR is 10.4->11.2 all the way thru.. my torque peaks around 4k rpms. and peak HP is near redline....

overall.. happy!!! first/second gear is pretty much useless under WOT...

Cusco twin carbon clutch sounds like a cement truck in 5th gear under lower RPMs, but damn, can it rev!! Heel-toeing bliss FTW!!!

well. this closes the chapter in my engine building... special thanks to Howard, Tadashi, and Richey @ Technosquare for everything..., Sharif @ Forged for the email help, Gurgen for the phone tech support, and my fiance angie for putting up with "it's almost done baby.. its just a few more hundred bucks"



cheston

 

Wow cheston good job and I am happy for you. Its amazing you got 17psi on the stock PE1420's thats just incredible. I am waiting on my #5 springs from PE so I can put them in. Keep us updated on your future projects Drift King.

 

Chebesto, congrats on wrapping everything up, and keeping your GF by your side the whole time. Enjoy the ride, and keep us updated!