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Discussion Starter · #1 ·
For those of you who don't frequent EvoM, here is where my car stands now after the most recent mods. I will list the mods and conditions first:

Mods:
Megan 3" Catless TBE
Forge UNOS MBC
Forge RS BOV
Forge Wastegate Actuator
Buschur Racing Air Filter Kit
Buschur Racing ported/coated stock exhaust manifold
Buschur Racing ported/coated stock 10.5 hotside
Ebay O2 Housing
Walbro 255lph Fuel Pump
SMC Alcohol Injection Kit
Custom Dynoflash

Stock Parts:
Upper and Lower IC piping
FMIC
Injectors
Cams
Cam Gears
FPR

MachV Dynojet with 424 rollers front and rear - 67* and raining with humidity around 50%. Also, please take note that all of these figures are uncorrected, but that's on purpose. SAE figures were 8whp/8wtq lower or so...

This is where I started - baseline pull on pump gas and boost gauge saying 22-23psi, but MAP sensor only showed 19psi, DOH! :eek: I thought I had been driving around at 22-23psi the whole time...



Alky @ 26psi - we tested 28psi and even 30psi, both of which gave significantly more power, but I wanted a reliable daily-driven tune at moderate boost, so I can use it for road racing


Comparison of the two - can't show torque, because the 19psi run didn't get a good rpm reading, so the tq is all screwed up (also why I have to show mph instead of rpm)



What you can't see is the 60+wtq gain between the 2 curves, but as you CAN see, the peak WHP gain isn't nearly as much as the total gain in area under the curve. I'm thinking that I'm losing some power up top due to boost (bov/wga) or ignition reasons. Otherwise, the WHP curve might continue to climb instead of flattening then falling off. It may just be that the turbo can't efficiently produce power at that boost level without cams, ic piping, and/or FMIC to allow it to breath and not get heatsoaked. I will be shaving some threads off my Forge WGA, then re-installing it to see if there wasn't enough pre-load. I get absolutely no compressor surge even in 6th gear after doing a part-throttle lift at low boost with the Forge RS tightened completely, so something is out of whack. My BOV is opening too easily, so that may have been causing high rpm boost leakage that resulted in an overworked hairdryer that was just blowing hot air...

Comparison tidbits:
- An 05 with cams and alky @ 27psi put down 335whp just a week ago
- I ran [email protected] on 93oct before all this. In fact, the 307 baseline was after installing my ported/coated exhaust parts with which I have not raced.
- Tuned IX with axle-back did 270whp (not 300whp like some others have on other Dynojets)
 

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Warrtalon said:
I'm thinking that I'm losing some power up top due to boost (bov/wga) or ignition reasons. Otherwise, the WHP curve might continue to climb instead of flattening then falling off.
It looks like it's running out of fuel op top/pulling timing. What do the logs say? Some 680 or 720 injectors will probably clear that bouncyness (6200 RPM's+) right up.
 

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Discussion Starter · #3 ·
turbolarry said:
It looks like it's running out of fuel op top/pulling timing. What do the logs say? Some 680 or 720 injectors will probably clear that bouncyness (6200 RPM's+) right up.
The AFRs are good up there, but I don't have the timing logs for that. Every run on alky was doing that same thing up top - losing power and being choppy/wavy after 6000 rpm. It could be timing, and I can't remember why I wasn't logging it during those runs, so that wasn't smart. I am thinking and hoping that I was running hot with the turbo due to a boost leak caused by the low tension on my new Forge WGA. It has so many threads that the turnbuckle can't go down very far and thus can't provide a lot of pre-tension. I'm going to cut some threads off, tighten it down more, then see if my fully-tightened Forge RS BOV actually causes compressor surge again at part throttle in 6th gear (which it should and is not currently doing).

It may be injectors, but people are running alky + cams up to near 400whp/400wtq on stock injectors. Not saying I Plan to do that, but I'm still down in the weeds at 340whp, so I'm thinking it's spark or boost-related.
 

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im hopin to put down similar numbers....al is comin to chicago for a flash....i have the following....

AMS TBE no cat
AMS FMIC w/ LICP
DEJON TOOL UICP
DEJON TOOL Crushed 1g BOV leak stop kit
HKS 272's
ARP Head studs
Ebay o2 housin
10.5 hotside
Hallman MBC
Buschur Meth Kit - will have

put down 321whp and 304 tq without 02 housin, bov, meth ki, and hotside on an AFC II

I dont road race at all, I hardly even drag race and this is my daily driven car, like you mentioned Warrtalon you didnt want to push the 28 psi because you road race, I am thinking since I dont road race heck even drag race that much I might be able to squeeze those few extra ponies by adding those 2 extra pounds of boost, cant wait til AL gets here for the tune, what benefit will i get from upgraded injectors at this point if any, and are they REALLY needed? thanks in advance.
 

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BigLEVO said:
what benefit will i get from upgraded injectors at this point if any, and are they REALLY needed? thanks in advance.
Since your already on an AFC, the benifits of larger injectors are;
No fuel cut.
More accuate tuning/the injectors will not be at 90%+ duty cycle.
Better timing advance.
IMO, you need them. I've logged an Evo with just 272 cams and it was already getting lean.
 

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i would need them regardless if I am goign to be adding the methanol kit? i was thinking that the meth would remedy the need for injectors but i guess i am wrong, damn another $350 to spent :(
 

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Discussion Starter · #7 ·
BigLEVO said:
i would need them regardless if I am goign to be adding the methanol kit? i was thinking that the meth would remedy the need for injectors but i guess i am wrong, damn another $350 to spent :(

No, you don't need them at all with the meth kit. Turbolarry was referring to using an SAFC as your tuning device on a car with 272s. That's when you start getting your Injector Duty Cycle up higher, plus the SAFC by itself can't make good torque unless you are able to remove a lot of fuel at peak boost, which requires injectors.

In your case, you're getting a flash anyway, which can lower AFRs while RAISING timing (SAFC can't do that), plus you'll have meth, which burns as a supplemental fuel in the cylinder, thus causing Al to REMOVE lots of fuel to keep the tune in the 11 AFRs. This removal of fuel drastically lowers your IJDs and makes injectors not necessary.
 

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Jeez man, your torque is CRAZY! Maybe I should go alky. I was very close a couple of weeks ago but decided not to until SMC releases a failsafe. Hopefully soon, though!
 

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Discussion Starter · #10 ·
turbolarry said:
$.02
It just seems easier to me to install injectors; and the only tank you need to keep filled is the gas tank. 350whp all day long, or a little less if your on 91 octane like this fine fellow;
http://www.socalevo.net/forum/index.php?topic=9180.0
:)
Well, those results are VERY abnormal. Most people don't get within 20whp of that on 91oct. Also, my numbers are without cams. With cams and stock injectors, you can tack on another 30whp/wtq. I much prefer not touching my injectors. The alky allows for much more power. I don't know why that particular car is such a freak, but it is definitely no tthe norm, whereas anyone can do my mods and get that power. We also can't see the correction factor or AFRs on that car. Mine were mid-to-low 11s with no correction factor.
 
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