This car belongs to Mark from Boiling Springs. He came to us today for a tune. His car was previously tuned by another shop, but he had several idle and drivability issues. He wanted to clear up those problems, as well as retune on more boost for a little more power.

Here's the setup:
F20c
InlinePro Manifold
Tial 38mm wastegate
780cc RC injectors
AEM FPR (base FP 50 psi)
Custom down pipe and dump tube
Custom intercooler piping
Precision Intercooler
eBay 50 trim T3/T4 turbo (with oil restrictor)
Cometic 2mm Headgasket 9.8:1 CR
AEM EMS

Here is the tune from today. It's only on the wastegate, which is fluctuating between 7.1 and 7.3 psi.









And, for the video:

YouTube - Mark Youtube.wmv



Mark, like many of the standalone ECU setups (such as AEM , PowerFC, etc..) we've tuned, come to us mainly because of drive-ability issues. A lot of people don't realize this but tuning for power is actually the most straight forward aspect of tuning. On the other hand, tuning for drive-ability and partial throttle is probably the most time consuming depending on the EMS used.

This particular setups spool ridiculously quick, as it should considering it's a 50 trim. The owner wanted a reliable daily driven and "cheap to build" setup and this encompasses all of that.

The following is for those who study our work and may be looking at this setup from an analytical point of view and have taken notice at the slight dip in power pass 6100k rpms.

In this particular case and considering the characteristics of a typical log manifold on a high revving motor, it's due to the log manifold restricting this setup . A common and noticeable side affect of log manifolds is cylinder cross contamination. This is more evident by the fact that injectors values are lesser at 9k rpms than at 6k rpms. Keep in mind that cylinder cross contamination has several different effects on a motor depending on the exhaust manifold design. In this particular case, unburnt fuel in the exhaust manifold reverts back into another cylinder which amounts to telling the ECU to inject less fuel to maintain proper a/f ratios. Hence lesser injector values at 9k than at 6k rpms. Generally speaking, you can say it's choking the motor since some of the HOT exhaust gases have nowhere else to go but back into the motor depending on the level of cross contamination... Add the turbulence of all the exhaust gases joining together at such a short distance from the motor and this adds to the issue. As a mater of fact, the chart with vtec set at 5k looked no different from 6.5k rpms.

This depends on the amount of boost as well. At some boost levels, it's easy to spot and at other boost levels, you would never know it's taking place although it actually is. You can still have cylinder cross contamination on a single scroll side-mount turbo setup but it generally has a different affect. Generally the VE of the motor is still affected but not nearly at the same extent. Usually side-mount setups don't have exhaust gases reverting into another cylinder. Instead, the exhaust pulses interfere with each other but to a lesser degree because of the greater distance from the exhaust manifold and the fact that each cylinder has it's own dedicated path for a well enough length instead of converging violently like in a log setup. Solution, divided housing manifold WITH DUAL WASTEGATES and this effect is eliminated. Unfortunately, some of these manifolds can cost more than an entire setup which defeats the customers goals and at the end, the customers goals is what's most important.

 

Nice, must be really fun to drive.

 

wait so what ems was used?

 

AEM EMS

 

oh sweet. you guys tune a lot of cool setups!

 

wow i love how REDICULOUSLY early you can hear that wastegate straight OPEN, dumping that excess gas haha, sounds GREAT! what rpm is it hiting that 7psi?

 

Between 3.5-4k rpms if I remember correctly.

 

thats the definition of a street car right there, low boost, almost 300hp. cant ask for a better setup.

 

Update: Just found out the car had a 2mm (.074")head gasket installed.

head gasket chart factory (2.0L & 2.2L)
crushed thickness .030" .074"
compression ratio 11:1 CR 9.8:1

I wish the customer would of disclosed this crucial piece of information beforehand. When I was tuning, it struck me as awkward that the car liked significantly more timing over stock values. I'm sure on a stock compression setup (11:1), it would of knocked but it didn't knock through our Dynojet software or through AEM EMS software due to the lower compression which makes sense after all.

 

I like how you have detailed post everytime you make a dyno thread...

fun and informative for all of us to referrance.
Thanks & keep up the great work!

 

eBay turbo ?

WTF

Poor choice on turbocharger, and log manifold to add to it. Poor choices all over the place. Ticking time-bomb.

 

please explain?
otherwise your post is usless.

Thanks

 

Put your flame suit on!

 

LOL. Guys remember that the customer wanted to keep the cost down. Obviously, he is aware that it's a matter of time before his ebay turbo takes a dump on him. I think it's pretty understandable and we can all agree that it will eventually happen at which point, a better quality turbo will take it's place. I can see that log manifold lasting quite a bit but time will tell.

 

I know what you mean... I just wanted to see if he could explain it in his own words.
Sometimes on forms people just regurgitate old stuff they've read or make empty/wasteful post.

 

is this the .63 a/r on exhaust side?

 

If I'm not mistaken, that's what the customer said it was.

 

that is retarted,
so every little thing that is said on HT has to have an explaination to back it up ? In an ideal world .. yes. But, I know this.. you get what you pay for. Now go translate that line.

 

ignorance is bliss....i think you need to translate this line as well.

 

your a hater bro im runing a ebay 50 trim for 3 years now on my crx pushing 300hp so.=/and to be real go take apart a garrett journal bearing turbo, and take apart the ebay one there the same.=/

 

what kind of turbine housing was used? that would be very nice to know... i think also a .63 or something like this... but maybe the owner can clear this up.

otherwise, good simple setup... hopefully the ebay turbo will last...
my first thought was... S2000, AEM standalone and then an ebay turbo... but i hope for him it will work... if it does, it's a nice setup.

Keep on going...

 

thats tight ugly set up but when your smokin on ppl they cant tell was your manifold looks like

 

why would'nt last my E-b lasted for 3 and still goin stong im over 300hp now.im not sating the E-B want fail but any turbo can fail on you bro=/.

 

80-90% of people who comment on ebay turbos have never even used one, granted, it is nice to have a quality turbo, ebay ones do hold up if taken care of and not max boosted all the time. proper cooling is essential too. on all turbos, any can fail. i have a cheap friend who runs one on his wrx. 15,000 miles and counting... commuting to school and low 12 sec passes on the weekends. they do work for the price. run one til you can get a quality garrett or somthing.

 

but thats if im stayin journal bearing because ebay journal bearing and garretts journal bearing are the same trust me but if im goin ball bearing its garret all the way.See ls-tunerboner thank you now you know what your talkin about good **** bro good ****