So there is a lot of talk about boost here, and obviously I like to yammer on about it too. But nobody here seems to be pushing anything but small frame compressors and 10-12psi

I refuse to film my tuning/WOT runs so as to avoid any law trouble like that dumb SOB twin turbo corvette owner in Oklahoma a couple months ago that caught his face in the rearview mirror, and was clever enough to have his date of birth on his youtube profile.

So I found a guy on the DSMLink forums who has basically the same size turbo (60mm inducer vs. 59.x mm for me, with similar turbines) and we run about the same boost (40psi for him vs. my 38psi)

The only real differences are he has a much nicer intake and exhaust manifold, as well as a MUCH larger intercooler, and convenient access to E85.

He also has a stroked (2.3l) version of the same engine I have so he spools a bit faster. This extra displacement doesn't affect the max airflow of the turbo however.

But what helps level the field is that I have some significantly bigger cams and a much higher redline so max engine demand is about dead even, and I have a just slightly more restrictive turbine housing to aid spool because I am short those 300cc's extra displacement, as well as arguably better fuel (Pump 93, Toluene, water and Methanol is quite a cocktail) He makes more torque than I do from what the ECU tells me, but we are making almost the same amount of whp at the top.

So here is what a big ugly journal bearing 59-60mm diesel turbo can do at ~40psi and why I go through the hassle of modding and maintaining an 18 year old car.

YouTube - Holset Hx40 654hp 618tq@40 psi

Goobers could probably appreciate this as he got to see it in person, hear it fire up but couldn't go for a ride because I am performing some surgery on it currently while it is in the garage for the winter... new turbo oil return line, re-soldering/tucking wires, new waterpump, re-configuring MAP/boost reference lines, etc.. So I owe you a ride this summer for the tease

Except for my super lopey idle, our cars sound identical otherwise.

Hope someone finds this entertaining!

Edit:
Here is Casey Barrett's 1G DSM doing 9.56sec @142 on a 62mm turbo @ 37psi for reference:
http://www.youtube.com/watch?v=GqDkEZtLumY&NR=1

This is what 40psi on a giant 75mm GT42R looks like from in the cabin
http://www.youtube.com/watch?v=OENiozzt3eg

 

The last one has got me Jonesing for a new motorcycle... I've never owned one that would do over 145 MPH.

 

From Chicago's own AMS, here's another video of a 680awhp ball-bearing 59.1mm GT37R on 38psi racing a bunch of bikes for reference!

YouTube - DSM vs BIKES

I am mostly posting all this because I want to show that you can run 30-40psi boost in a street driven DD.

Forget everything you have heard on the interwebs, this is not that far fetched. No engine has a "Boost" limit. Not a single one. Boost is different on different setups providing different amounts of airflow at different efficiencies.

It is all in the build and the tune.

My cars and theirs above drive to the track and back, street legal.

I am used to running 30+ psi with medium and large turbos on stock blocks which came from the factory running only 9psi on a 14B.

Now I intend to do this with my Fit.

Starting small with a 43mm turbo, the 14B @ 20-25psi, which will hopefully net me 30-35lbs/min. Or about 290-330whp, but not super efficient (~65% compressor efficiency) at those flow/boost levels.. should do it though.

If I can pull that off on stock internals I am moving up to variable turbine geometry H351VE good for 35psi and 50-55lbs/min, or well over 500whp. Then we will know for sure when the L15 will blow

 

I know what you mean! The one that catches and passes the DSM after a 38psi launch from 40mph is a worked Yamaha R1!

The DSM looks like it's going warp speed when it hooks and then the Yamaha just toys with it!

But it's because of that speed that I no longer ride bikes. People commuting around here suck at driving for the most part, lost too many friends and had too many close calls on my old CBR or the R6 I had last.

These are the cars I see on the street and was initially inspired by.

And here is yet another 750whp DSM running 38psi on a GT42R on the street! Look at it fly by the Evo that just passed it!
http://www.youtube.com/watch?v=zlFFx...eature=related

What a lot of people on this forum don't understand is that my 38psi and 60+ lbs/min (600+ whp) is very pedestrian in the Chicago DSM scene. There are more than a handful of 800whp+ DD's between Chicago, IL and Waukesha, WI. With ~5 people I know of pushing 1000awhp, three of which are street driven regularly, one is a DD (Tim Zimmer's silver Borg Warner S480sx turbo @ 43psi in a 2G DSM)

I am kind of in the upper-middle end of the pack. There are a LOT of 400-500whp DSMs around here. So I am kinda jaded in that regard.

That doesn't even include the 700-800awhp Evo 8s and 9s that AMS churns out.

Or the Exotics, Supercars and a bunch of V8 domestic guys that will humor us for a roll race on a secluded stretch.

Some of the above have since stopped racing 4cyl turbos. Especially the Mustang owners. Too much ego at stake I guess... most Vette owners seem to know better and won't even look at you if they here a lopey old POS cruise up to them.

 

There is a British company that is building a Rotrex kit for R model BMW twins... The 1995 GS model dual purpose 1100 cc bike did 0 to 60 in 3.4 seconds, 60 to 90 in 3.6 and did the 1/4 in the mid 10s in stock form.. I got one of the first ones in the country and put 32000miles on it in a year.. With out a doubt it was the best thing with wheels I have ever been on or in and by far the best touring bike that has ever been.... You damned sure can't ride a Goldwing up and down fire roads in the Quachita mountains, out run sport bikes of that period on tight back roads with sand and gravel in places...I was sent a request from BMW as to what improvements could be made to improve the bike and much to my surprise everything that I suggested appeared in the second generation bike... I guess the majority of other owners that received the letter did the same... I was one of a few that were given a special price on the bike and riding gear due to my many years of riding and knowledge of motorcycles.. I was riding a 73 R75-5 pulling a Velorex sidecar and had stopped in to order some heavy duty fork springs and I think that impressed them.

 

Now that is a seriously crazy and cool story.

 

There was mention about BMW looking for high mileage riders to get some exposure for the bike in I think it was Cycle World. I already had my bike at the time it came out.. It won accolades from publications world wide and was the first motorcycle to reach the northern most point on the continent during the middle of winter. A number of people have circumnavigated the planet on GS models since then... An earlier OHV 700cc model GS went from Point Barrow to the southern most tip of Argentina making it the only vehicle to ever do so... BMW cars are okay I guess but not nearly the machines the motorcycles are.

 

Wow all I can say..

YouTube - DSM vs RICER INTEGRA GSR TURBO OWNER vs DSM

I came by this video while the ones you posted up DSM. Legit cars for sure, Teggy driver is a douche.

 

In spite of the douchey driver that integra is still pretty fast.

MilkMan is actually Jack McGee, the owner of Jack's Transmissions, he's on a private tuning forum I frequent. But he has to turn all that extra drivetrain considering he is AWD and much heavier than the 2wd Integra. So really from a stand still that would be no contest, which is why the other guy wanted to go from a roll obviously.

Jack is a nice guy, and he builds some stout gearboxes.

There are a lot of douchey drivers around here too. I'll even have kids follow me around while I am doing tuning pulls which is more obnoxious than words can describe.

Especially because I'll put a couple city blocks of distance between us, then let off the gas and slow back down to start another pull from 2000rpm in 3rd and then they finally "catch" me while I am going 35mph and flyby at 100 with their hazards flashing like they won something. Then they hammer on the brakes when they see my headlights tip up as the rear squats (I need new shocks soon lol) and try to do it again, so I usually get off the highway at that point. Bear in mind I only do this when the road is completely empty and the only person I endanger is myself and any co-pilot who volunteers to hold the laptop and watch the data read out and my gauges...

I don't want to race your 110whp civic. Or your 260whp POS automatic Mustang. Do not follow me off the highway and into the gas station in your plastichromed, mismatched widebody kit. I do not like street racing.

 

I had an encounter with one of the type of characters your referring to while my neighbor was with me.. I was going to go around him in the right lane when he shifted down and jumped down on it so I shifted into fourth, pulled forward and changed lanes... The kid asked why I hadn't shifted to 3rd and just blown him away, I told him that I knew I didn't need to so why waste fuel... He thought that was funny.. It was a Civic with a wing, body kit, bad paint job, overly wide wheels and tires and of course an obnoxious sounding fart can exhaust, oh yeah and lots of stickers. He was turning a bunch more revs than me to.

 

Isn't that the best feeling?

Just knowing that you are able to take riced out rides from a 40mph roll when they start in 2nd or 3rd without downshifting from my (super tall) 5th is always nice.

 

You have to admit that down shifting to where the real power is and pulling away from a car that is recognized by everyone as being a high performance car is a better feeling.

 

Oh definitely... but then sometimes they follow me or get close, and that is when dangerous situation get created.

Maybe its something I keep with me from when I had my bikes, but I drive like everyone else on the road is trying to kill me.

Because around here no one is paying attention to anything going on outside of their iPhones.

 

You know, I've posted the same thing as what you just did.. The only time I got away with being totally fearless on a bike was when I was dressed in a uniform that so closely resemble that of what Dallas cops wore that I got free coffee and food and discounts at stores... I was escorting funerals and over sized loads at the time riding police model Electra Glides.. That was in 73-75, part time. People got the hell out of the way for the flashing red lights and one company I worked for had us equipped with pump action 12 gauge shotguns.

 

Integra had oil consumption problems i think judged by the smoke.... Surely not spinning tires in 4th or 5th gear at something like 120+mph i'm not believing that!!

Marko!!

 

It might be a load of BS, might not. The Teggy driver is a twat, but his car is legit if it can keep up with Jack's 2G.

FWIW, since I have been FWD for the last year, even at ~19psi on the stock turbo (14B) I was making enough power (34lbs/min, so 300-340whp worth of air) to roast the tires through 3rd and finally stick at 110mph in 4th. That was on an open-diff and all-season tires though.

On the S259 @ 20psi (let alone >35psi) I can definitely liquefy the tires past 120mph. lol