Latus fuel injection

[zigzzagz]

I'm aware that you guys do your own throttle bodies, are they only for bikes done in shop or can someone from the general public get a t.b. and manifold? It's obvious from dynos I've seen that your setup is capable of at least 150HP, and I'm having my doubts about my 53mm HPInc setup and I can't find a single bike with a HPInc 53 making more than 135HP STD. Are your t.b.'s available in different sizes? What the price for t.b. and manifold? I was unable to find anything about it anywhere else on the site. You would happen to have any flow numbers and what they were flowed at? I'm going to make a move here pretty soon and it'd be a shame to go to carb after all the work I've done with the f.i.
Thanks

[Mike]

We really have not advertized our T-body but are in the process of building a 113 for American Iron Magazine that will be using one (we just finished a 95 build for them). Yes they are available to anyone, but we ask that you provide your stock body for us to do the assembly and setup (we use several parts off your stcok t-body), 06 bikes are a little more problematic in that we convert them back to 05 and earlier so we need several additional parts to do so and the three wire harness ends need to be changed (this is what some of the other aftermarket guys are doing as well). I'm actually doing one now for a shop in Texas. We will also provide what mapping we have that is the closest to whatever combo you may be running. We have some Power Commander maps but strongly prefer Race Tuner. We do not have maps for everthing but hopefully can get you close enough to fine tune from.
We use S&S manifolds so we can accomadate any head/port setup you may have (we modify them for the injector mounting) we just need to know what you require. We use a replacable venturi that can be any size required and what makes us unique is that the venturi is placed behind the throttle plate. This reblends the turbulent air off the plate so that the port/valves/cylinder see cleaner more laminar air (this affect seems to be supported by the flow bench testing; example, our 36mm version flowed 30cfm @22 in. more than H-D's 41mm. Sim. to the Mikuni Smooth Bore affect). With an open venturi (58mm) the t-body outflowed Baisley's bench (530cfm @ 22in.) so it should pretty much satisfy anything currently out there. The 48mm venturi supported the 150hp numbers on two Jims 120's but the customers wanted the 52's inplace. If at anytime the motor combo is changed say from 95 to 113ci then only a venturi change and mapping is required (pos injectors also), so this unit can grow with your motor. It uses all stock sensors and ECM, so troublshooting and diagnostics are same as stock. Using the same equipment (digital tech and race tuner) and trouble codes as stock any H-D dealer should be able to support if needed. With the exception of the manifold, it is all billet construction and black hard anodized.
It currently retails for $999.95 and this includes assembly, manifold of choice, chrome air cleaner backing plate, 51cv/Zippers air cleaner element, two venturis of choice, setup instructions, available map files on cd and our support. Options are additional venturis, oversize injectors and Race Tuner. 06L models require harness mods and approx. $170.00 additional parts. Most people require injectors due to the nature of what these are being utulized on (stock t-body will support about 108hp and stock injectors 125hp). It is not compatible with the Ness Big Sucker air cleaner and possibly others. Last note, the success of this unit (and any others) is a direct function of the tuners capability. We will provide what help we can.
Regards, Mike

[zigzzagz]

How much are the extra venturi's? Some things I've read recently say that with fuel injection and throttle bodies, low rpm torque is not negatively affected by a larger than necessary venturi size like a carbed bike is. For instance like putting a 48 mik on a moderate 95" is known to hurt your low rpm torque but you could put a 57mm throttle body on that same 95" and have optimal power throughout the rpm band. Have you found this to be the case? And if so would it not be best for me to go with the largest venturi? So, and lastly, which of your t.b.'s would you reccomend I use on my 124" in hopes of hitting the 150HP mark?
thanks as always.

[Mike]

Extra venturis are $75.00 each but we will trade with thtose supplied if you wish, or you can tell us what sizes you would like to have with the throttle body (you get two with each t-body).
Our testing has shown that a 48mm venturi will satisfy 150hp but bike owners always feel better with something larger so we usually end up with 52's in them. Our testing agrees with your assesment that size does not seem to really matter so long as it is not too small causing a restriction. Many head porters believe in keeping port velocities as high as possible to help cylinder fill and this thinking has some merit. It may also help low speed response and tuning also. Based on this theory we recommend the smallest venturi that does not cause a hp loss just in case there is some truth to this theory.
Thanks, Mike