I want to say 900, but I'm not sure. <img src="gr_sad.gif" border="0">

 

I was thinking it was between 900-1000.

Anyone?

 

887 cfm
http://www.proautotech.com/catalog.htm

Then there is this page:
http://www.fortunecity.com/rivendell.../24/ls1air.htm
but they do tests at 20.5 instead of 28..

man, this forum have enough gramlins?

 

From what I have read, alot of these so called "ported" TBs don't include a larger throttle valve. Thats not what I would call a ported TB. It may help airflow slightly by contouring / smoothing the inlet of the TB, but, unless a larger valve is installed, it really isnt "ported", is it...

Ron,

 

thats what I have thought as well. Im not sure how large the opening is on our intakes though, so how much larger of a blade could be put in a TB?

 

Magnus and PSJ, flow at 20.5" is what carbs are flowed at, so its good for comparisons, but 660 cfm @ 20.5 doesnt sound right (too low) what im thinking is that this is because they are flowing at 79% throttle angle, is that stock throttle angle WOT? Has any body removed throttle stop and checked gains at the track at least?

 

John the stock TB flows 733 cfm on a 4-barrel carb rating of 1 % of mercury (20.3 inches of water) test depression.

 

I'm trying to compare our TB's to an ACCEL 1000 mm TB.

 

[quote]Originally posted by Pro Stock John:
<strong>I'm trying to compare our TB's to an ACCEL 1000 mm TB.</strong><hr></blockquote>

1000 mm that is big ***! <img src="gr_images/icons/wink.gif" border="0">
1000 cfm is what you meant though <img src="gr_images/icons/cool.gif" border="0">

 

1) How many cfms are our stock throttle bodies?

2) Also, when we do a light port/polish, what do the cfms increase to?

 

I would like to know this myself. MTI claims there ported TB's flow 100 cfm more than stock (whatever that is)

*edit* I want to say 770~780 or so stock but Im not totally sure.

[ January 09, 2002: Message edited by: Bad Habit Bird ]</p>

 

I was thinking it was more than that.

 

Removing the stop would be counter-productive. However, you can grind the stop down if necessary to achieve a 90 degree WOT position, as many of us have done.

[quote]Originally posted by LS1derfull:
<strong>Magnus and PSJ, flow at 20.5" is what carbs are flowed at, so its good for comparisons, but 660 cfm @ 20.5 doesnt sound right (too low) what im thinking is that this is because they are flowing at 79% throttle angle, is that stock throttle angle WOT? Has any body removed throttle stop and checked gains at the track at least?</strong><hr></blockquote>

 

GWJ, does 90 degrees show any hp gains or ET? Does it cause any intake manifold distribution problems? Any bodys help with these questions would be much appreciated.

 

[quote]Originally posted by LS1derfull:
<strong>GWJ, does 90 degrees show any hp gains or ET? Does it cause any intake manifold distribution problems? Any bodys help with these questions would be much appreciated.</strong><hr></blockquote>

90 degrees is the angle you want your TB blade for maixum flow, going any less or too much would result in less flow. BTW on a stock TB the blade may be 75mm but just before it there is a ridege that is smaller, im sure its worth some CFM wi
thout upgrading the blade.