BooWFO
New Member
5-15 with a combo N/A is fairly common.Seraphitia102 said:
Lots of Forced induction People have seen 15 with just a TB.
As for the bullitt intake that is a whole nother topic.
Help me understand why one needs to upgrade to a 70-75mm TB?
- Thread starter 5spd GT
- Start date
Lots of Forced induction People have seen 15 with just a TB.
As for the bullitt intake that is a whole nother topic.
jstreet0204
Active Member
5spd GT said:
An eaton m112 spun to 14k rpm will flow somewhere around 850 cfm on the inlet side, a Vortech s-trim can flow 1000cfm.
That's what I was looking for...so a 75mm TB might be worthwhile on a blown combo, where as the stock will not.
A stock tb will flow plenty for a non-pi or pi headed car. I was just wondering why some get the "big" tb's for n/a cars when the stock flows enough and the "big" tb flows over double.
Does anyone have a dyno result of a tb swap on a stock or practically stock car on back to back dyno runs. Same day and relative time?
Jason - Did you ever sell the heads/springs/cams?
Oh and on the cfm "stuff"...I was wanting to compare 486 cfm ( 281 cubic inches at 6,000 rpm at 100% VE)...and what would an S-trim for example putting out X amount of boost do to one at 100% VE. I figured there might be a formula of sorts somewhere.
If the S-trim can flow 1000 cfm, I'm sure a 75mm TB would be almost enough to warrant buying one.
I see the throttle acting different, but as far as power, I just don't see power being gained. The throttle might feel different, but don't mean you gained hp/tq. N/A is what I'm referring to.
A stock tb will flow plenty for a non-pi or pi headed car. I was just wondering why some get the "big" tb's for n/a cars when the stock flows enough and the "big" tb flows over double.
Does anyone have a dyno result of a tb swap on a stock or practically stock car on back to back dyno runs. Same day and relative time?
Jason - Did you ever sell the heads/springs/cams?
Oh and on the cfm "stuff"...I was wanting to compare 486 cfm ( 281 cubic inches at 6,000 rpm at 100% VE)...and what would an S-trim for example putting out X amount of boost do to one at 100% VE. I figured there might be a formula of sorts somewhere.
If the S-trim can flow 1000 cfm, I'm sure a 75mm TB would be almost enough to warrant buying one.
I see the throttle acting different, but as far as power, I just don't see power being gained. The throttle might feel different, but don't mean you gained hp/tq. N/A is what I'm referring to.
m0dular depot has a link right off the main page comparing a bunch of aftermarket plenum/tb combo's with an N/A car with dyno results. The Accufabv combo netted the most gains out of the ones they tested.. hence why most people go with them around here.
Well I wasn't meaning just Accufab. Just that the aftermarket tb's for an n/a car flow much more than the engine can even use. Thus, the reason for the question...
Oh, and guys/gals...I'm not getting a throttle body. I was just asking a question
I wasn't even thinking about it...
Oh, and guys/gals...I'm not getting a throttle body. I was just asking a question
I wasn't even thinking about it...
jstreet0204
Active Member
5spd GT said:Well I wasn't meaning just Accufab. Just that the aftermarket tb's for an n/a car flow much more than the engine can even use. Thus, the reason for the question...
Oh, and guys/gals...I'm not getting a throttle body. I was just asking a question
It is better to have a little more than you need. Too much more though and you start lose velocity of the air charge, so you can't just slap on a 90mm throttle body.
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