Awsome results!!! I just finished having the BR350 kit put on my car and I am definitely thinking of upgrading again. This makes me want to do it even more, keep us posted.

 

updates?

 

Latest change was putting in the HKS DLI 2 ignition and plugs gapped to .028 With this setup I get no ignition stumble at high RPM heavy boost and have been able to tune it for 22.5 psi on 93 octane with no knock problems. Just as I thought, the wastegate is almost to small. At boost pressures below 20 psi you get significant boost creep. One of the things people don't realize is that running higher boost actually means less of the exhaust pressure needs to be bypassed around the exhaust wheel, so you can run a smaller wastegate at high boost pressures than you could get away with on low boost pressures. The 38mm Tial is perfect for race gas or alcohol injection boost levels, but anything below 20 psi and you get significant boost creep up to 20+ psi.

Later,

Keith

 

Aside from the boost pressures, what are your impressions of the drivability (area under the curve) the car feel the same around town until boost hits? Obviously boost levels appear lower, but your getting much more dense air for that pressure..

I've been on the fence about this for awhile, the key for me is that the car's drivability feel the same until everything hits.

 

Maybe time to bump up to the 44mm WG?

 

Anything above 4000 RPM is awesome! Even though it is only 8 to 10 psi at that point it pulls strong. People talk about having full boost by 4000 RPM with a GT35R on a 2.0 motor..... I suspect these are people without any kind of data logging. It feels like you have full boost by then but you are really only half way there Between 3000 RPM and 4000 RPM the car feels good. Not spectacular, but good. Below 3000 RPM you have no boost and it fells like the car used to feel at 2000 RPM and below. Around town driving feels just fine to me.

Here is my new mantra for people who whine about lag "Boost is just a downshift away"


Keith


Keith

 

Hey Keith, my motor is almost completely together - cams go in today as do the last pullies and the cam gears. I bought a 272 intake cam to replace the 264 (good idea?) Anyway, we'll see how it works. I'm pondering my wastegate spring selection too...

 

I went with the 1 bar spring for two reasons. One, it was the stock item. Two, I figured if I ever wanted to install any sort of safeguard associated with water alcohol injection that would cut boost, I'd rather be able to drop boost to 15psi rather than 19psi.

Sorry for the off topic interjection...

 

I think your boost creep issue is due to the placement of the wastegate on the Buschur manifold. Since 3 cylinders almost have to enter the turbine housing before they can be suck out through the 1 runner w/ the wastegate. Boost creep isn't a big deal. You just have to work around it w/ your boost controller.

 

What size wastegate did you go with? Personally I would go with either a 40mm tial or 44mm tial if they had the same kind of flang as my 38mm tial.... unfortunatly they do not.

I use 272 for both intake and exhaust with HKS cam gears. With the AEM EMS and cam gear adjustments I have it idleing steady as a rock better than the car idled stock.

Did you end up going with a 2.3 liter setup? If so, the long duration cams would probably be a good thing.... perhaps even the 280's.

Later,

Keith

 

Is that picture of some kind of adaptor to use a 44 mm wastegate with the flanges that came on the 38mm wastegate? I would seriously consider stepping up to the 44mm if it is that simple.

Keith

PS: Wouldn't I need to bore out the hole in the manifold larger to match the wastegate then?

 

what is boost creep?

 

Drive ability is in the eye of the beholder You should know this already Malibu Jack Turbos this big seem really run especially right when you throw them in. My car is obviously making loads of power and is perfect for what I want it for. As far as in town driving... put it this way.. Last night I went around for a little put in town.. I figured I would TRY to make some noise late at night with my car so I was flooring it from street to street. Car never made much noise though It takes about one full block for my car to actually fully spool in first. I never tried to fully spool it because I would be going around 50mph at the end of the block if I did

Turbos like this will kill any cornering fun. They will kill any auto cross. They will kill any type of spoolup. On a larger true track you could probably still use it without much problems though but even still... this turbo hits so damn hard if it hit around a corner you would be surely screwed.

Now.. on the bright side. This turbo will make your car faster than a motorcycle (Trust me I own one and so do many of my friends and we have fully tested it). At my low boost 25.5psi I will beat any normal 600 (Brand new R6's, Honda 600rrs, etc..). Big liter bikes will beat it but barely. With 30 psi they couldnt keep up. When people ride in your car they will compare the feeling thier stomach gets to a rollercoaster dropping. When ricers dont know its AWD and tell you to do a burnout, you can actually easily light up all 4 if you want. The straight line speed is one of the most addicting things that I have felt. Granted I knew I was going to drag my car and never cared about autocross and such but still... i think once someone tried out a setup like mine they would never want to go back. I kept all my stock turbo setup stuff so we could still autocross the car if we ever wanted but its too big a pita to get it back bolted up with the stock turbo so we never have. If you lived closer to me I would bring ya out and you could feel whats it like.. I would let ya take her around the town to feel the spool if ya wanted.

 

I've never been a fan of big turbos, but this is what I always suspected.. I think my perspective of how good the car feels is as long as it really doesn't feel "Worse" than it did before in daily driving, then I'd be ok with it.

 

LOL Couldn't have said it better myself, my perspective of drivability is probably alot different than others.. But anyone who has ridden in my car always comments about how smooth and drivable the car is itself (aside from being quick).. I don't know that I would want to sacrifice that, but it seems to me that being a horsepower junkie also, that I probably would be one of the few who could tolerate the quirks as long as the car felt "Ok to drive" when at low boost.

This is one of those leaps that I have always been on the fence about, I've always been a huge proponant of the stock-ish turbos, and my opinion hasn't changed, but I really miss the top-end power that my other cars had.

And if you weren't such a hike, I'd actually take you up on the road test offer.. LOL