That's fine but you should have it tuned on C16 before adding the alchy. How much boost was the first guy running?
That second one is pretty weak.

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'94 vr4- Now with extra slowness

Trevor really seems to have his stuff together, but some of the things he does, I think he does just to prove to everyone that it can be done. (no timing control, high hp OBD2, spraying meth to get away with smaller inj, etc, etc.) The kicker is he does it all under the guise of "being simple," but when you look at his methodology he's changing inj size, playing with fuel pressure, and ontop of that balancing meth spray. when it could just be make fuel control right, and play with timing tables. In the end it's just two different paths to the same spot. use whatever works for you.

I really don't see any reason to spray alcohol on a C16 run. your bringing down the octane...

I've been a long time questioner of spraying water and alcohol, and would like to see the back to back runs on a dyno showing improved performance. I honestly don't believe it's as great as everyone says. I think it's just upping the boost 2 psi, but losing hp to having water piggyback it's way through the combustion process. I have been wrong before though...


I agree on the second dyno chart being a tad weak for upgraded turbos. a BPU 3/S should just about make that much torque, roughly.

LOL, take a look again guys... I posted the boost in bold.

The last guy was only running 13.5 psi. The first chart is 18 PSI on 93 Octane with no alky/meth. The second (499AWHP) is running (edit 25 PSI)

RobBeck has a car with these and he said he accidentally peaked at 28 PSI the other day. I think there's some room to grow on these yet.

Jason

I'll be the first one to concede there is a large smokey/foggy area surrounding alcholo/propane injection and its actual benefits.

I have read many threads claiming people are able to run several psi more boost through injecting either methanol, methanol/water, or propane. It seems most people have good results spraying pure methanol (no doubt raising octane of mixture) and chris from IPO has proclaimed the same or better results with propane injection. I decided since I enjoy being different, and most people use alcohol, I was going to try propane. I have in my pile of parts not being used IPO's propane kit. Hopefully I will be able to shed some real life data kinda light on the propane side of things next summer.

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I realized that it was only 13.5 psi.

that's still right in the range of any other BPU stealth or 3000gt.

at 13.5 psi those turbos should have been flowing more CFM than 9bs, though, right? if they were there should be a bump in power...

I dunno, maybe I'm expecting to much...

As far as propane, there was a guy on us3s that sold out for a corvette. he ran propane a long time ago. He was pretty quick. I recall something about the 11s from memory. not sure if it was high or low 11s.

he claimed 108 octane. It lasted a month from one of the larger tanks. He did a few good posts on it. I think his screen name was deptac, or something...

Adam, not to be confrontational....I could understand your claim if the 395AWHP was measured at the Engine, but this is AWHP which suggests the car is putting down ~530 at the crank.

...waiting for a Dyno post of a BPU 3/S putting down 395 AWHP @ 13.5 PSI...

Jason

You know, I suppose your right.

I was mainly talking about seeing the torque numbers wind up around there. I've seen quite a few BPU numbers around there(maybe 20 ft bls lower), but they all have really healthy cars...

The horsepower is infact bumped up higher, though... And I suppose that that would come from the turbos not falling off as you get higher in the RPM band where you'll make horsepower, which is why the torque numbers look more BPUish (same exhaust housing, 6g72 has good low end/mid range torque) and why the power gets bumped up so much, because the dyno shows a constant slant. those turbos wanted to be run higher...

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Bad decisions make good stories.
Look at it! LOOK AT MY @SS AND TELL ME IT'S PRETTY!

Yes, those are very nice numbers for 13.5psi. 15G/DR650 class turbos only average 350-370 awhp at that boost level. I am BPUish and I made 334 awhp/349 awtq @ 14.6 psi on a dynojet.

It looks as if these 19T's are going to work out fairly well. What are the costs involved with these vice 13T's?

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The cost question might be better poised torwards RobBeck on 3si.
The price varies based on what you send to him. It's not a cheap way to go by any means. I just got a really good deal on my 13T housed, 19Ts.

I can tell you that I am paying him $625 shipped for the conversion to bolt up.

Check out his turbo service thread here:
http://www.3si.org/forum/showthread.php?t=228909&page=1

Jason

yeah, Ive read that thread previously. I just wanted to know what the 19T wheels cost if bought seperately because you'd have to tack that on top of the 13T cost.

EDIT: It looks as if you need:

- WRX 13T turbos $400
- 9B turbos $0
- 19T compressor wheels $375 (forced performance)
- Rob Beck Machining/Assembly $600

Correct me if I'm wrong but it looks as if he machines the 13T compressor housing to fit the larger 19T wheel, and still uses the stock hotside.

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