I think you have found your first generalization. I'm not sure where the info came from on the TB, but I have about 150-160 customers and a dozen or so dealers that do not agree with the high end power only statements. They make almost the same gain over the entire RPM range. I had my TB's tested by Kenz and Rocket Factory before I ever sold the first one. Everyone was surprised to find that it made more power over virtually the entire power range. Since I started, they have been tested by Holeshot designs, KBR, Hanssen Performance, Racers Edge....... and the list goes on and on. With the same results.
That being said, after the big 3, I believe the cam to be the biggest bang for the buck. The Hotcam stageII works fine with or without compression increases, and is quite easy on the valvetrain:thumb:
KENNY, First of all, I think you do great work and I hear great things about your TB's. In fact I have spoken in PM's with you on RF.com about getting 1 myself. Unfortunatly, I didnt save 2 seperate PM's where you told me yourself that I wouldnt see hardly any gain on the low end and all you could tell was that it pulled longer on the top side. Trust me I wish I would have saved those to help prove my so called Opinion.
If you read bluetraxx.com it says this *pasted from there site.
What is produced by all this? Horsepower gains up top without losing torque and power down low. An added bonus is that with the +2mm throttle body, the horsepower and torque is held longer in a usable range. When we initially threw our 700R on the dynometer, it had a serious power loss down low compared to our “before” dyno run. We started adding fuel and it got even worse, so we went the other way and leaned out the fuel by 4%, and found that to do the trick. Now it was running very comparable to our "before" results down low (5500-4500 RPM, and below). Up top (5500+ RPM) we found it quite lean. We upped the PCII between 4-8% at various points along the RPM range until enough fuel was added. Click HERE for our dyno plot.
Dyno Graph shows hardly no gain up to the 5400 mark on RPM's and it shows only 2Hp gain at 7200 ish RPM's.
It does show that it makes a gain up top and holds the power longer.
Now dont get me wrong here. I was just telling him that if he isnt making straight pulls where he is in 4th gear pinned out then He should look for other mods that would benefit his style of riding better.
I have spoke with many other forum members who have your +2 TB and for the most part honestly, they say , & you said to me in a PM. That A person probably wouldnt notice the gain by the butt dyno. I have seen some threads that say they see a difference and some say then cant tell much difference.
Here is 1 dyno where there was an increased Peak HP but you can clearly see it wasnt over the entire MAP
Here is another Dyno with a before and after of the +2 TB.
Still no gain in the entire map
Quote from: Rocket Factory on September 06, 2007, 10:07:31 pm
The X4 I would not recommend for any small or non drag applications. It moves the power to the right too much.
Just Dyno'd Kenny's +2 Throttle body on a stock bore stock stroke 11:1 stage 3 web head porting and got over 2 hp better across most the curve.
Good job Kenny. Start making them faster your in for it now

.
Jason
Thanks so much Jason!
Kenny
Again, Im not looking for an argument however I believe that My INFO that you discredited above is published on Raptorforum.com and on bluetraxx article that they wrote up about it being the best mod for the TOP RPM's
Hope this helps out Diggs with his decision.
Hell Diggs take your stimulus money and buy all the parts........
a +2 TB also.....
It is worth the money if you are looking for a couple ponies on the higher side of the RPM curve.
And Kenny, I still Plan On getting my TB done by your excellent work as soon as I can get back into modding my beast.