Now thats what I'm talking about
mark

 

I don't think 10mg of Ambien would knock me out now if I were you.....

 

Looking good Scott!!!

Interesting that your peak torque is 60 lower than your peak HP. As I recall, Markski had a similar delta (actually, I think Mark had an even bigger difference between his peak HP and his peak torque). Moreover, after flattening out in the 5000-6000 rpm range, you have a big jump in peak HP between 7000 and 7500 rpms (over 50 HP). I suspect your high rev limiter is why your peak HP is 60 higher than your peak torque . . . at the OEM redline, your peak numbers are very similar. Your high rev limiter appears to be a key component of your set-up and your ability to achieve big HP.

I wish I wasn't stuck with an OEM rev lmiter, so that I could see HP gains above 7000 rpms.

Keep up the strong work. Looking forward to some performance data.

Craig

 

What kind of tires you planning on running around town? Sounds like you'll be getting the opportunity to try quite a few different ones in the coming months.

 

Craig,

With stock heads and small turbos, you'll usually see the horsepower and torque remain almost the same. But with a setup like mine, and even moreso with Markski's...we're making much more hp more than any given torque number. The more flow you have, the larger the delta between the HP and torque. This is a good thing for us, since huge torque is what damages engines.

I'm also running relatively low boost right now, which keeps torque down as well.

IRT the higher rev-limit...it's just another piece of the Proto package.

 

Craig, its the boost that produces TQ not RPMs.... and since these figures are at .8 to 1.2 bars we will never see the TQ that others do. Now if he spins that baby up to 1.5+ bars u will see it come alive. Im repeating both Todd's words as well as Bobby's... both of which work very closely ...
if u look at VRalexanders graph notice how high his TQ is.... but thats because hes running 1.7 bars.
markski

 

Nitto NT01's on the street, and BFG DR's on the strip.

 

Scott, congrats on a job well done ....looking forward to some track times and a few 60-130's.... you have me all excited now since I just dropped of my case halves and crank to the engine builder... Take care buddy...WOW. Kevin

 

Thanks, bro. Will do.

Hopefully I can make my local track day on the 11th...but if not, I'll still get you some 60-30 times very soon.

Good luck with your car. I'm sincerely excited for you, Craig, John and Tom. The more fast TT's, the better.

 

Not sure I follow you there Scott. Joe and I both have ported heads, and I have larger valves (larger than yours). Yet, Joe and I both have very similar peak HP and torque. Moreover, if you look at your torque and HP numbers at 7000 rpms, they are very similar. The difference between your HP and torque occurs above 7000 rpms (at which point your HP increases by 50).
Not unique to Proto. Unfortunately, my tranny precludes me from going into that territory.

The beauty in your set-up, Scott, is power similar to Mark, with smaller turbos . . . in other words, the best of both worlds. Kudos my friend!!! Now slap a driftbox on that thing and let her fly!

Craig

 

Mark,

You know far more about this stuff than I. However, if you look at ALL of Scott's power curves, at all boost levels, the HP and torque figures are very similar at OEM redline. It is only at 7700 RPMs that the difference is meaningful. That strikes me as a byproduct of the rpms. Moreover, although I do not recall the specifics, I vaguely recall that your set-up, at maximum boost, had a significant difference between HP and torque . . . wasn't the difference plus or minus 100? Again, you have a very high redline. I suspect the difference between your peak HP and peak torque was far less at the OEM redline.

None of this is particularly surprising. High revving cars often have larger disparities between HP and torque (e.g., Ferraris), whereas lower revving cars often have less of a delta between HP and torque (e.g., Vipers, ZO6s).

Craig

 

I dont know more then u... I repeat a lot.... LOL
The second reason, one which I did not share with you is that I have a .82 A/R housing... that is big. Unfortunately I had the turbos long before the build out. Bigger A/R housing are good for higher boost. Mine and Scott's( from what I was told) is .82. yet we are hardly running 1.5 bars. Smaller A/R will produce TQ but will die sooner if it chokes...
I am contemplating in the future of swapping my a/rs to .63 mm which will produce 100 more TQ and move the power curve sooner but about 1000 RPMS. Dont ask me how I know but even my EVo tuner who installed and tuned many garrett gt30rs and 35s said the same thing. I even considered Scott's set up as well. We did not know the car till we both tuned it and then ran it. Im thinking just for kicks of installing the .63 ar housings and running the car... Im sure the TQ will wake up. Its a fine line trying to find a good turbo with particular set up because one does not know where it will land until it does. If I had my way I would tune my car 3 times.... on three turbos then choose the one I like.
markski

 

HP = Torque * RPM / 5252

At 5252 rpm, HP = torque by definition. At any rpm above 5252, HP > torque. At any rpm below 5252, HP < torque. Thus, high winding motors will have relatively more hp than torque, whereas a slow spinning motor will have more torque than hp.

One of my favorite analogies is an uphill bicycle race between a marathoner and a football lineman. The lineman can push harder on the pedals, but the marathoner can spin them much faster. The lineman will want to pick a gear that results in the pedals turning slowly (low revs, plenty of torque), but the marathoner will want a gear that lets him spin the pedals crazy fast (low torque, but high rpm).

They may produce the same horsepower climbing the hill, but in vastly different ways.

Jeff

 

Craig,

I'm only telling you what was explained to me. I'm no expert on this stuff, either.

Thanks, Craig. Appreciate the words. Looking forward to hearing about yours setup when she's complete. I'm sure she'll be a monster just like Joe's car, maybe even moreso.

 

Yep....I was saying the same thing when I mentioned small turbos and how they produce more TQ relative to HP, earlier. I agree, Mark.