Nissan 370Z Forum - View Single Post - STILLEN 370Z Supercharger System

worldfamousz · 10-20-2010, 10:21 AM

out of curiosity has anyone performed any compression tests or leak down tests at all on the motors after install and some hard driving? I know that these motors are already showing signs of oil consumption here and there (not as prevalent as the older VQ motors by any means), so I'm just curious if these motors are holding up to the task.

When comparing GTM and Stillen kits please note that there are differences in kit components and this provides a huge range of variables that can change overall performance numbers, even though they're both FI, it's still not comparing the same apple to the same apple.... with that said, BOTH companies have had reputations with " exaggerating " numbers on what they claim (I have seen this with my own eyes first hand with a few FI built cars I've closely worked on). So you cannot take their claims as ammunition to compare the two really either.

what really matters is how they drive real world. dyno graphs don't tell enough of a story on how the car drives.

For example: when I had my stillen SC 350Z, it would dyno low even though I would be running 100 octane, custom stage 4 and new maps etc. BUT the way the car drove was great, linear power output all the way through to the upper RPMs etc. Sure it wasn't 420 HP that any stock motor Z could pull with a decent TT kit on it, but I had power in daily driving where they didn't. I didn't have oil temp issues like some of them did. I didn't have to worry about leaking wastegates like the older Greddy kits, I could go on and on. Real world driving is what makes a kit really shine. I can illustrate where having more power doesn't mean that the same car is any faster, in fact it can be much slower, all things are relative. Take the last generation Mustang Shelby GT500 vs the normal C6 vette. The shelby has 100hp more. yet it's slower in the 1/4 mile, any road course, 0-60, etc. In nearly every test, it's not faster if anything it's equal. Yes, they are two different cars completely, but if you're only looking at numbers and dynos (which it seems this thread is really all based on), then there you have it lol

If you really care about power numbers and that's your main selling point, save, build the motor, and go crazy anything less is a total waste. if not, why argue back and forth about numbers on paper.

10-20-2010, 10:21 AM	#2151 (permalink)
worldfamousz Base Member Join Date: Oct 2010 Location: so cal Posts: 52 Drives: mazdaspeed3 Rep Power: 15	out of curiosity has anyone performed any compression tests or leak down tests at all on the motors after install and some hard driving? I know that these motors are already showing signs of oil consumption here and there (not as prevalent as the older VQ motors by any means), so I'm just curious if these motors are holding up to the task. When comparing GTM and Stillen kits please note that there are differences in kit components and this provides a huge range of variables that can change overall performance numbers, even though they're both FI, it's still not comparing the same apple to the same apple.... with that said, BOTH companies have had reputations with " exaggerating " numbers on what they claim (I have seen this with my own eyes first hand with a few FI built cars I've closely worked on). So you cannot take their claims as ammunition to compare the two really either. what really matters is how they drive real world. dyno graphs don't tell enough of a story on how the car drives. For example: when I had my stillen SC 350Z, it would dyno low even though I would be running 100 octane, custom stage 4 and new maps etc. BUT the way the car drove was great, linear power output all the way through to the upper RPMs etc. Sure it wasn't 420 HP that any stock motor Z could pull with a decent TT kit on it, but I had power in daily driving where they didn't. I didn't have oil temp issues like some of them did. I didn't have to worry about leaking wastegates like the older Greddy kits, I could go on and on. Real world driving is what makes a kit really shine. I can illustrate where having more power doesn't mean that the same car is any faster, in fact it can be much slower, all things are relative. Take the last generation Mustang Shelby GT500 vs the normal C6 vette. The shelby has 100hp more. yet it's slower in the 1/4 mile, any road course, 0-60, etc. In nearly every test, it's not faster if anything it's equal. Yes, they are two different cars completely, but if you're only looking at numbers and dynos (which it seems this thread is really all based on), then there you have it lol If you really care about power numbers and that's your main selling point, save, build the motor, and go crazy anything less is a total waste. if not, why argue back and forth about numbers on paper. Last edited by worldfamousz; 10-20-2010 at 10:28 AM.