Thread: RPM gain from better air intake?
07-06-2006, 10:45 AM #1
RPM gain from better air intake?
I currently have a Riva Stage 2 setup that runs great, goes 75 - 76 mph at 8000 rpms with the Riva cold air intake in the stock position, no additional air mods. I was thinking about playing with a rear air intake setup, but was curious how many rpms people have gained by going from the Riva setup to something better ...
07-06-2006, 12:27 PM #2
Vern -I'm not really sure about rpm, but i can tell you that I picked up .5-.8 lb of boost on my B kit going from 3" to 4" air intake.
07-06-2006, 12:36 PM #3Originally Posted by Vern
Here is what I've been telling people.
Hook a smooth bore tube to your SC and have it come up out of the engine compartment. Take the seat off and do a speed run with it. Then put your Riva back on and do another speed run. Then you have a back to back with what would be close to a rear intake without modifying anything.
07-06-2006, 01:04 PM #4
i have never used the riva power filter set up but i have a 4" air intake up to glove box with glove box removed. i can tell you i ran 73.3 with JUST riva stage 1 components, rideplate holes filled, and 4" air intake i just described...in 90+ degrees. no other mods.
ever tried to drink a thick milkshake through a straw...same idea. the sc is pulling this massive amount of air though a small tube, which causes friction which = bad. what you need is a bigger volume..ie bigger diameter tube. obviously cooler air helps out tremendously as does the length of the tube (shorter the better). the sc has a bigger volume of air "on tap" so to speak, for instant throttle response. plus its cheaper .
ill post some pics over the weekend, the sc whine sounds f'n wicked
Last edited by mxl16; 07-06-2006 at 01:13 PM.
07-06-2006, 03:30 PM #5
Got it, thanks guys. I may play with some air intake ideas this weekend.
07-06-2006, 09:56 PM #6
You might double check on how lean a Riva Stage II would be with more air volume. I thought I remembered them saying to only use their intake.
07-07-2006, 08:00 AM #7
it wont lean it out enough to cause any problems. Im curious why they didn't at least make a 4 inch Power Filter for the Stage 3 Kits considering the new SC housing which flows more volume.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By Urwheelman in forum 4-Tec PerformanceReplies: 22Last Post: 08-01-2011, 09:40 PM
By Dr Len in forum 4-Tec PerformanceReplies: 4Last Post: 12-03-2006, 09:28 AM
By jcc011185 in forum Polaris Open DiscussionReplies: 6Last Post: 09-20-2006, 09:00 AM
By JD 1 in forum 4-Tec PerformanceReplies: 86Last Post: 02-06-2006, 01:06 AM
By Shibby1485 in forum 4-Tec PerformanceReplies: 29Last Post: 10-22-2005, 01:24 PM