I had this done but I wanted to know how much it is when other companies do this?

Its bored out . They made new butterflys to match and took the secondary OE butterfly and used it in the primary.

The screw are replaced with low profie heads and there is nothing left to interupt air flow. even the shaft was modified.

How much larger are the butterflies?

1st is stock primary, 2nd is the other stock 2ry and the new secondaries are increased in size of the difference as the the primary OE is To the secondary OE.

The bottom butterfly is the other 2ndary and then you can see the top too increased. I think 30% more. Its as large as he thought possible with out running into the throttle side open that would cuase problems.

uuuummm I guess this helps?

otherside

Looks nice and I am sure you will notice a difference from midrange on up.



NICE!

rotaryextreme is looking into doin this too.... but the price is pretty steep

This was done by Mark Oswald 6 time NHRA champion yesterday. He drove the Candies & Hughes funny car . He may do more since he wrote the auto cad program for me. What would be an offer on price per each that I could entertain him with?

This was a trade and favor for me sooo I paid for materials and stuff. If you guys are reasonable he could do more. It would be with your actual intake.

Let me know, maybe a GB.

Really cool!

It was around 400 for the rotary extreme unit, Greddy asks like 600-650. For any of these prices I would sure as hell like to see a dyno sheet to compare stock to modded.

I'd also be interested to see the bored unit w/ larger butterflies vs. a standard ported TB w/ the TB mods done to it.