Hi I have a CVO Springer 2008 with work done as follows:
SE stage iv kit
58mm throttle body (currently getting upgraded from stock)*
SE heavy breather kit
Oil cooler
Flat top pistons
SERT
VANCE & HINE Bigshot staggered

The Dyno is show 113 HP and 112 tq with the stock throttle body.

I would like more performance and thinking of replacing the V&H wtih supertrapp but need to know what would be the best option:
1. Supertrapp Supermeg
2. Supertrapp FATshots
3. Or other??

Can you please advise if I will get more performance over the V&H and why would I go for a one over the other?

Thank you.

 

A Supertrapp 2/1 certainly gives the tuner the latitude to tune the pipe for the build.
Always a home run here.
Scott

 

Just ordered the Supermeg for my upcoming build. Right now I'm running the BSS and while they work ok, the Supertrap will be quieter and will give more usable torque where it's needed. No personal experience to back this up, but it's repeated over and over to be an excellent exhaust.
Ron

 

I posted the same thread on the supertrapp forum and now confused which way to go. Its always best to stick with the manufacturer recommendations however Im just not 100% convinced.

Supertrapp answered:
Comparison wise, based on past testing our staggered Mean Mothers will make more power than the V&H Big Shot staggered. We tested these pipes on a 107 back when we redesigned the Mean Mothers. Our pipes made 2-3 more HP and about 2 more Ft/Lbs of torque. The V&H pipes are NOT true staggered pipe, equal length pipes, ours are. The other pipe I'd recommend is the FatShots system. The 2" primary pipes and dual 4" mufflers should work well with the 110 and all the work you’ve done. Plus, they should be a lot quieter than drag pipes.

The 2:1 SuperMeg is an excellent performer on a stock or mildly modified machine. You may realize some low end torque advantage with the 2:1; however overall performance, taking full advantage of your build would most likely be realized with the other options.

So I asked this question:
Ok, so if Im understanding correctly, the recommendation would be the Fatshots then mean mothers and finally the supermeg but all would out perform the V&H?

My bike currently performs great over 3500rpm, its sluggish down low hence the upgrade to the 58mm TB. We are hoping this helps down low. On the dyno the dip in performance was shown down low also.

1. Knowing this info do you still think the max performance gain would be with the fat shots?

Supertrapp answered:
Yes; however we would recommend one upgrade at a time, ie, the pipe or throttle body. It would set a baseline for additional upgrade(s) and one may even resolve your low end issue with out the other.

 

Rock-solid advice from a leader in the exhaust industry.
Scott

 

Are you still running the stock cam? Exhaust wise--a 2into1- will build better TQ for you....but for more low end, look to a cam change. HILLSIDE can give you some good suggestions.

 

Running SE 264 cam kit...

 

It's not the 58TB that's hampering your lower end torque it's the 264's and your lower than optimum compression with those flat top pistons and the 110 heads. Many other choices out there for better torque in the lower to mid range but what you need to ask is how will the new cams work with what I already have otherwise you are looking at a tuning nightmare.

 

R&B racing makes good 2-1 ,check them out.

 

I agree wholeheartedly that the 264 cam is the thief.
If the heads were re-surfaced, only, and either a Wood 8 or a "44 Magnum" was used, @ 10.5-7 cr, then you'd see that run well.Scott