Bone stock 370 + Stillen HFC & CBE + reflash/tune = +51whp!?!?
05-14-2009, 06:19 PM
#41
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lets just wait till you get your exhaust, and we'll see where that puts you with hfc's, exhaust, and a tune. then it could be more of an apples to apples comparison
05-15-2009, 03:56 AM
#44
actually, headers gave him 10 whp through out the whole power band, and something like 10-15 with the intakes (don't remember exactly)
lets just wait till you get your exhaust, and we'll see where that puts you with hfc's, exhaust, and a tune. then it could be more of an apples to apples comparison
lets just wait till you get your exhaust, and we'll see where that puts you with hfc's, exhaust, and a tune. then it could be more of an apples to apples comparison
https://my350z.com/forum/6201412-post1.html
(I'll PM him to look at this thread and give us more info if possible.)
05-15-2009, 01:06 PM
#49
On the 370z site.......good info more mods than above and he only gained 40rwhp over stock but he did remove the muffler. I personally think something isn't right about this dyno above.
Sorry the image quality is low. I snapped this from my iPhone.
Black line: Stock, but with rear muffler section removed.
Red line: Stillen G3 intakes, Stillen headers, Stillen Cats, Stillen exhaust.
Blue line: Stillen parts + Technosquare ECU reflash + dyno time.
In summary: $3,200 in Stillen parts gave a 26 hp increase over stock to bring it up to 328 compared to the original 302.
$700 for ECU reflash and dyno time ($500 for reflash only) gave an extra 15 whp for a total of 343 whp.
In total, it was nearly $5,000 including installation of the parts to gain 40 whp over stock. The throttle response in now extremely precise. The sound is wonderful, the over-rev to 8100 rpm is phenominal. The "Buzzy" engine vibrations that car magazines have been talking about are no worse above 7500 rpm. If anything, it smooths out a little.
One last thought: Lets pretend I gained 2 hp from removing the stock rear exhaust section. This car would have made 300 hp in this dyno. If the stock engine was 332 crank hp and it made 300 hp on this dyno, that's a conversion factor of 1.1066 for frictional loss (332/300). After mods, this car is making 343 hp on this dyno, which would be roughly 380 hp at the crank (343 x 1.1066). Not bad.
-Phim
Sorry the image quality is low. I snapped this from my iPhone.
Black line: Stock, but with rear muffler section removed.
Red line: Stillen G3 intakes, Stillen headers, Stillen Cats, Stillen exhaust.
Blue line: Stillen parts + Technosquare ECU reflash + dyno time.
In summary: $3,200 in Stillen parts gave a 26 hp increase over stock to bring it up to 328 compared to the original 302.
$700 for ECU reflash and dyno time ($500 for reflash only) gave an extra 15 whp for a total of 343 whp.
In total, it was nearly $5,000 including installation of the parts to gain 40 whp over stock. The throttle response in now extremely precise. The sound is wonderful, the over-rev to 8100 rpm is phenominal. The "Buzzy" engine vibrations that car magazines have been talking about are no worse above 7500 rpm. If anything, it smooths out a little.
One last thought: Lets pretend I gained 2 hp from removing the stock rear exhaust section. This car would have made 300 hp in this dyno. If the stock engine was 332 crank hp and it made 300 hp on this dyno, that's a conversion factor of 1.1066 for frictional loss (332/300). After mods, this car is making 343 hp on this dyno, which would be roughly 380 hp at the crank (343 x 1.1066). Not bad.
-Phim
05-15-2009, 01:54 PM
#51
LOL @ you HR guys, people put up dyno from 370's and immediately they are discredited. Wyndyn? wtf kind of dyno is that? probably on the same line as the inflated dynocom or whatever A.H. used for his dyno. 
for christ's sake, you cant you people find a dynojet?
for christ's sake, you cant you people find a dynojet?
05-16-2009, 09:57 PM
#54
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anyway, here is my stock dyno vs catback (fujitsubo w/ motordyne y pipe). I gained 11whp. Now granted, on my original dyno, I had brand new air filters and this time I have about 10k on mine. Thats good for 2-3 whp MAX. It was also 10 degree's warmer today, so thats another 1-2. So under absolutely optimal conditions, I would have gained 16 whp. Your telling me if I get hfc's, I'll gain another 30 (51-5-16=30)* whp?
*51 is what the car in the OP gained
5 less is what someone said a regular hr would do (not vhr)
16 (at absolute optimal possible gain) is what i already gained with the exhaust
*51 is what the car in the OP gained
5 less is what someone said a regular hr would do (not vhr)
16 (at absolute optimal possible gain) is what i already gained with the exhaust
05-17-2009, 04:37 AM
#55
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than again... AFR and timing plays an important part.
if you go "all out" is possible, but than you risk pinging any time the conditions aren't perfect, the fuel isn't the best quality and the engine and the oil will overheat quick.
that's it. there is no magic.
out of the factory engines are tuned in a really safe way to survive any possible condition they'll meet and take in account any possible production variation and tolerance.
05-17-2009, 06:45 AM
#56
anyway, here is my stock dyno vs catback (fujitsubo w/ motordyne y pipe). I gained 11whp. Now granted, on my original dyno, I had brand new air filters and this time I have about 10k on mine. Thats good for 2-3 whp MAX. It was also 10 degree's warmer today, so thats another 1-2. So under absolutely optimal conditions, I would have gained 16 whp. Your telling me if I get hfc's, I'll gain another 30 (51-5-16=30)* whp?
*51 is what the car in the OP gained
5 less is what someone said a regular hr would do (not vhr)
16 (at absolute optimal possible gain) is what i already gained with the exhaust
*51 is what the car in the OP gained
5 less is what someone said a regular hr would do (not vhr)
16 (at absolute optimal possible gain) is what i already gained with the exhaust
Read thru this thread:
https://my350z.com/forum/vq35hr/4269...-hr-20whp.html
Last edited by KS0385; 05-17-2009 at 07:11 AM.
