The Truth - 440cc Injectors @ 8PSI? Maybe 9PSI?
#21
Originally Posted by gompka
so a turbo at 9.5 psi vs. supercharger at 9.5psi flows more air even though they are at the same pressure? Err anyone care to explain why this is so? They work the same way hence I would assume 9.5psi is 9.5psi, but someone please enlighten me...
#23
so a turbo at 9.5 psi vs. supercharger at 9.5psi flows more air even though they are at the same pressure? Err anyone care to explain why this is so? They work the same way hence I would assume 9.5psi is 9.5psi, but someone please enlighten me...
its called volume over psi. its kinda like this you take a small sealed box and a much larger sealed box fill both at 9.5 psi at the same psi the larger box has a lot more air inside then the smaller box most turbos flow more volume per psi then our s/c
its called volume over psi. its kinda like this you take a small sealed box and a much larger sealed box fill both at 9.5 psi at the same psi the larger box has a lot more air inside then the smaller box most turbos flow more volume per psi then our s/c
#24
Originally Posted by streettimetc
so a turbo at 9.5 psi vs. supercharger at 9.5psi flows more air even though they are at the same pressure? Err anyone care to explain why this is so? They work the same way hence I would assume 9.5psi is 9.5psi, but someone please enlighten me...
its called volume over psi. its kinda like this you take a small sealed box and a much larger sealed box fill both at 9.5 psi at the same psi the larger box has a lot more air inside then the smaller box most turbos flow more volume per psi then our s/c
its called volume over psi. its kinda like this you take a small sealed box and a much larger sealed box fill both at 9.5 psi at the same psi the larger box has a lot more air inside then the smaller box most turbos flow more volume per psi then our s/c
#25
Originally Posted by gompka
so a turbo at 9.5 psi vs. supercharger at 9.5psi flows more air even though they are at the same pressure? Err anyone care to explain why this is so? They work the same way hence I would assume 9.5psi is 9.5psi, but someone please enlighten me...
No, they do not work the same way. Turbo is driven by exhaust gases from the engine, S/C'er is driven off of the belt/pulley system. Turbo produces greater CFM's over the S/C'er. Even the smallest turbo ran on the tC (which was the 16G I believe), out performs the S/Cer.
For a visual difference in power:
Turbo @ 7-8 PSI vs S/C'er @ 9.5 + bolt ons
http://www.youtube.com/watch?v=dNKaOD86wOE
#26
Originally Posted by jetlounge
cfm, boost/rpm,iat (thermodynamics), volumetric efficiency, bsfc....all play a part.
Read a corky bell book for good fundamentals on f/I.
Read a corky bell book for good fundamentals on f/I.
#27
Originally Posted by rhythmnsmoke
Originally Posted by gompka
so a turbo at 9.5 psi vs. supercharger at 9.5psi flows more air even though they are at the same pressure? Err anyone care to explain why this is so? They work the same way hence I would assume 9.5psi is 9.5psi, but someone please enlighten me...
No, they do not work the same way. Turbo is driven by exhaust gases from the engine, S/C'er is driven off of the belt/pulley system. Turbo produces greater CFM's over the S/C'er. Even the smallest turbo ran on the tC (which was the 16G I believe), out performs the S/Cer.
For a visual difference in power:
Turbo @ 7-8 PSI vs S/C'er @ 9.5 + bolt ons
http://www.youtube.com/watch?v=dNKaOD86wOE
thats how bad by turbo tC takes on my N/A tC... I wondered that bieng S/C'ed, he would've kept up, even if it was for 1-2 seconds
#28
Originally Posted by scionkidd
Originally Posted by rhythmnsmoke
Originally Posted by gompka
so a turbo at 9.5 psi vs. supercharger at 9.5psi flows more air even though they are at the same pressure? Err anyone care to explain why this is so? They work the same way hence I would assume 9.5psi is 9.5psi, but someone please enlighten me...
No, they do not work the same way. Turbo is driven by exhaust gases from the engine, S/C'er is driven off of the belt/pulley system. Turbo produces greater CFM's over the S/C'er. Even the smallest turbo ran on the tC (which was the 16G I believe), out performs the S/Cer.
For a visual difference in power:
Turbo @ 7-8 PSI vs S/C'er @ 9.5 + bolt ons
http://www.youtube.com/watch?v=dNKaOD86wOE
thats how bad by turbo tC takes on my N/A tC... I wondered that bieng S/C'ed, he would've kept up, even if it was for 1-2 seconds
#30
Originally Posted by scionkidd
but this tC in the video is S/C'd with goodies... and he's getting creamed just like a stock tC would.
#32
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The Si had I/H/E, so it's not like it was stock. That Si was probably putting 210-220 down, the tC was probably putting 220-230 down. Now think about the power band. When the tC shifts from 2nd to 3rd, it's only making about 150 right after the shift and won't make full power til redline. The Civic shifts directly into it's peak power band and holds this power to redline, and again in the next gear.
#33
Originally Posted by CarbonXe
The Si had I/H/E, so it's not like it was stock. That Si was probably putting 210-220 down, the tC was probably putting 220-230 down. Now think about the power band. When the tC shifts from 2nd to 3rd, it's only making about 150 right after the shift. The Civic shifts directly into it's peak power band.
#35
had to be somtihng wrong with that tc my s/c tc would have smoked it i have header full 2.5 exhust no cats and lite crank pulley im running stock boost intake and stock tune and i pulled 3 cars on buddys 08 si stock from 55mph to 115mph and beat a type s by 1 car while i missed a gear we got it form a dig i pulled a 1/2 a car through 1st missed 2nd he pulled a car on me i grabed 2nd throught 2nd i pulled right next to him and then hit 3rd and pulled a car on him he was bone stock my best time at the track has been a 14.42 at 96.88 mph and a 60ft of 2.21
#36
Originally Posted by scionkidd
Originally Posted by rhythmnsmoke
Originally Posted by gompka
so a turbo at 9.5 psi vs. supercharger at 9.5psi flows more air even though they are at the same pressure? Err anyone care to explain why this is so? They work the same way hence I would assume 9.5psi is 9.5psi, but someone please enlighten me...
No, they do not work the same way. Turbo is driven by exhaust gases from the engine, S/C'er is driven off of the belt/pulley system. Turbo produces greater CFM's over the S/C'er. Even the smallest turbo ran on the tC (which was the 16G I believe), out performs the S/Cer.
For a visual difference in power:
Turbo @ 7-8 PSI vs S/C'er @ 9.5 + bolt ons
http://www.youtube.com/watch?v=dNKaOD86wOE
thats how bad by turbo tC takes on my N/A tC... I wondered that bieng S/C'ed, he would've kept up, even if it was for 1-2 seconds
SI is not stock, it's full bolt-on. He only won by like a headlight. Now, I can give it a little to the fact that he should have beaten the SI, but his skill level was not that great at the time, and he had never really street raced. With that said though, giving the same mods and a better driver the outcome between his car and mine would have been no different. Still would have taken off that hard nonetheless.
I raced him again later in my Z when it was bone stock. We did about a 30 roll and his S/C'ed tC hung with me (and in some cases got a slight lead) all the way up to 100mph. Then the top end on the Z would over take him by a half a car to a car length.
We also have on video the S/C'ed tC (Rich is his name) vs Louis in the Stage 0 tC. Basic Bottom line Stage 0 running 6 PSI. Rich lost to him by a half a car......and that was with Rich + his girlfriend vs Louis with his Brother + Brothers wife in his car.
#37
Originally Posted by CarbonXe
The Si had I/H/E, so it's not like it was stock. That Si was probably putting 210-220 down, the tC was probably putting 220-230 down. Now think about the power band. When the tC shifts from 2nd to 3rd, it's only making about 150 right after the shift and won't make full power til redline. The Civic shifts directly into it's peak power band and holds this power to redline, and again in the next gear.
Yes, Rich put down 238whp. And yes, people often forget about PowerBands when you put cars vs cars and trying to see who "SHOULD" win. With better driving Rich would have won the majority of the racing between him and the SI. But people got the idea like he would pull on him or something, that's not the case. He most likely would win more now, but it would not be a straight up...pull on him.
#38
Originally Posted by streettimetc
had to be somtihng wrong with that tc my s/c tc would have smoked it i have header full 2.5 exhust no cats and lite crank pulley im running stock boost intake and stock tune and i pulled 3 cars on buddys 08 si stock from 55mph to 115mph and beat a type s by 1 car while i missed a gear we got it form a dig i pulled a 1/2 a car through 1st missed 2nd he pulled a car on me i grabed 2nd throught 2nd i pulled right next to him and then hit 3rd and pulled a car on him he was bone stock my best time at the track has been a 14.42 at 96.88 mph and a 60ft of 2.21
You just guessing, or have you actually raced an I/H/E 06+ SI?
Just FYI....Stock Si's have been known to run 14.5 at the track.
#39
heres another question for you guys so i dont start my own thread and have you guys flame on me for not searching haha
5-7psi on a T3/T4 turbo with the SC'er 410cc injectors... what do you think? will i be ok? or should i go to a bigger injector?
5-7psi on a T3/T4 turbo with the SC'er 410cc injectors... what do you think? will i be ok? or should i go to a bigger injector?
#40
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I'd go bigger. The 410's will probably come close to maxing out on 7psi. If you're maxing them out, you'll lean out pretty hard if you hit a boost spike. I'd play it safe and try to never go over 80% duty cycle.
Besides, with 550cc's, you could turn up the boost and have more fun. 5-7psi is slow .
Besides, with 550cc's, you could turn up the boost and have more fun. 5-7psi is slow .