VortecCPI
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SuzukiSavage.com Rocks!
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Round 3 of SRX600 intake tuning.
So this is what happens when you have a big single that can only turn 7,000. This is my third attempt at intake tuning and each time it got longer it got stronger. Original setup was pods on the bells and that was garbage.
I did create an airbox area by installing a cover over the open ind of the swingarm. The priimary filter is now serviceable via the side cover. Since this filter sees 80% of the air intake duty it needs to be cleaned more often than the secondary filter so this is great.
Also... The secondary filter now has way more breathing area around it because the primary filter is no longer right next to it. not only that, the new primary runner has opened up space for fresh air to more easily reach the secondary filter.
So far I can see only benefits and no negatives to this very simple modification.
So now that we have increased the intake runner length what does that do for the engine? Total primary runner length is now right about 20" which gives:
+ For 2nd harmonic, RPM range is from 5,874 to 7,128 with a pulse strength of 10 percent + For 3rd harmonic, RPM range is from 4,414 to 5,044 with a pulse strength of 7 percent + For 4th harmonic, RPM range is from 3,441 to 3,848 with a pulse strength of 4 percent
Blah, blah blah... So what does it mean? It means the primary intake runner is now tuned for three different harmonics that are ALL withing my engine's operating range! I just get a BIG boost from 5,874 to 7,128, a GOOD boost from 4,414 to 5,044 and a SMALL boost from 3,441 to 3,848.
So what else? The secondary runner is tuned for 4th harmonic, RPM range is from 5,984 to 6,692 with a pulse strength of 4 percent. So while the secondary runner is not optimal it WILL add a small boost from 5,984 to 6,692. That coupled with the primary 2nd harmonic should work great.
So what did it do? A LOT. Kind of hard to believe what a difference it made. The exhaust note now has a very distinct CRACK from about 4,000 to 6,000. I believe this is from the mild ram effect of the system. Absolutely stupid amounts of torque from an internally stock engine. I can't wait to get the Web (3)87 in there with a Wossner piston milled for 10:1.
I know, I know... It's in the wrong forum but I figured you guys might enjoy it.
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