NA: ITB's
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From: Nashville,Tn
Originally Posted by MINES13,Apr 8 2007, 08:22 AM
ITBs will give you more power then an equal engine setup with the factory plenum or anything offered on the market as of now. ITBs with a good cam grind (which is basically all I have internally) really works great. I wouldn't say you need a lower end or any head work. But done properly it will help. If you are staying NA DO NOT enlarge either the intake or exhaust ports. All of the gains on the F20C head come from valve seat work and chamber work.
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From: Smithtown, NY
[QUOTE=ERL_S2000,Apr 8 2007, 08:14 PM] Yup, I have tested the head setup and oversized valves are not needed and will slow velocity. I will be running a custom head setup with welded chambers and a Custom Hytech cam for 13.0:1 CR which will be made in the CC. I am also switching for the Twm to Jenvey 50mm or maybe even
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From: UCF Knights!
If all you're concerned with is peak power, you've missed the entire point of ITB's, or N/A tuning for that matter. Go get a turbo.
ITB's are about transient response, and midrange punch. Sure, I'm sitting at 215 rwhp peak, where after just my AEM EMS, I was at 208...but...and pay attention...
My 215 comes on at 7900 rpm. My 208 was at 8800 rpm. I'm sitting almost 50 hp above stock thru pretty much all of the meat and potatoes of my powerband. Every N/A s2000, and I mean EVERY n/a s2000 that I've lined up against, from a dig or roll, I slaughter by carlengths, whether they've got 15 peak power on me or not. How long do you spend above 8500 rpm? A second, at most, each gear. How much time do you spend between 5000 and 8000? Uh huh, all the rest of the time.
ITB's are about transient response, and midrange punch. Sure, I'm sitting at 215 rwhp peak, where after just my AEM EMS, I was at 208...but...and pay attention...
My 215 comes on at 7900 rpm. My 208 was at 8800 rpm. I'm sitting almost 50 hp above stock thru pretty much all of the meat and potatoes of my powerband. Every N/A s2000, and I mean EVERY n/a s2000 that I've lined up against, from a dig or roll, I slaughter by carlengths, whether they've got 15 peak power on me or not. How long do you spend above 8500 rpm? A second, at most, each gear. How much time do you spend between 5000 and 8000? Uh huh, all the rest of the time.
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From: Smithtown, NY
Originally Posted by wildcardtrd,Apr 10 2007, 06:47 AM
If all you're concerned with is peak power, you've missed the entire point of ITB's, or N/A tuning for that matter. Go get a turbo.
ITB's are about transient response, and midrange punch. Sure, I'm sitting at 215 rwhp peak, where after just my AEM EMS, I was at 208...but...and pay attention...
My 215 comes on at 7900 rpm. My 208 was at 8800 rpm. I'm sitting almost 50 hp above stock thru pretty much all of the meat and potatoes of my powerband. Every N/A s2000, and I mean EVERY n/a s2000 that I've lined up against, from a dig or roll, I slaughter by carlengths, whether they've got 15 peak power on me or not. How long do you spend above 8500 rpm? A second, at most, each gear. How much time do you spend between 5000 and 8000? Uh huh, all the rest of the time.
ITB's are about transient response, and midrange punch. Sure, I'm sitting at 215 rwhp peak, where after just my AEM EMS, I was at 208...but...and pay attention...
My 215 comes on at 7900 rpm. My 208 was at 8800 rpm. I'm sitting almost 50 hp above stock thru pretty much all of the meat and potatoes of my powerband. Every N/A s2000, and I mean EVERY n/a s2000 that I've lined up against, from a dig or roll, I slaughter by carlengths, whether they've got 15 peak power on me or not. How long do you spend above 8500 rpm? A second, at most, each gear. How much time do you spend between 5000 and 8000? Uh huh, all the rest of the time.
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From: Nashville,Tn
Yup, Even tho my setup right now is not working as planned i still picked up GOOD midrange power. Being able to carry that midrange power and keep it climbing into the top end is gona be sweet!
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From: formerly versionJDM
Originally Posted by wildcardtrd,Apr 10 2007, 07:47 AM
If all you're concerned with is peak power, you've missed the entire point of ITB's, or N/A tuning for that matter. Go get a turbo.
ITB's are about transient response, and midrange punch. Sure, I'm sitting at 215 rwhp peak, where after just my AEM EMS, I was at 208...but...and pay attention...
My 215 comes on at 7900 rpm. My 208 was at 8800 rpm. I'm sitting almost 50 hp above stock thru pretty much all of the meat and potatoes of my powerband. Every N/A s2000, and I mean EVERY n/a s2000 that I've lined up against, from a dig or roll, I slaughter by carlengths, whether they've got 15 peak power on me or not. How long do you spend above 8500 rpm? A second, at most, each gear. How much time do you spend between 5000 and 8000? Uh huh, all the rest of the time.
ITB's are about transient response, and midrange punch. Sure, I'm sitting at 215 rwhp peak, where after just my AEM EMS, I was at 208...but...and pay attention...
My 215 comes on at 7900 rpm. My 208 was at 8800 rpm. I'm sitting almost 50 hp above stock thru pretty much all of the meat and potatoes of my powerband. Every N/A s2000, and I mean EVERY n/a s2000 that I've lined up against, from a dig or roll, I slaughter by carlengths, whether they've got 15 peak power on me or not. How long do you spend above 8500 rpm? A second, at most, each gear. How much time do you spend between 5000 and 8000? Uh huh, all the rest of the time.
on paper i make "more" power than nate, but his car is much stronger than mine. 
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From: Nashville,Tn
Whats really interests me is the Throttle size. We know that 52mm is too big( What I run now) because air velocity is just too slow. So its seems 48 and 50 is the best bet. It would be interesting to see the mid-top end power the 2 make vs each other. In the end the 48mm setup could produce more power in the entire range. I guess the best is gona be what throttle size is going to give you the most gains over the rpm range. 50mm might perform better from lets say 7500 and up. For me I want to rev to around 10,000 Rpm. All this 11,000 rpm stuff is garbage unless you have a cam that will make power that high. Im hoping I am hoping I can hold peak power till 10,000 Rpm.