Hey folks,wish i had of found this place sooner! I`m alsmost finished installing a used whipple kit on my truck right now, I have a few questions, i noticed someone on here is running the same setup as i on a 7.4l. so they may know, I have ben unsucessful to get part numbers for the belts, and i know its not impossible to figure it out but if somebody had the part numbers that would be great!

Also in noticed alot of you are reuring to the displacement of your chargers, all i know is that the model i have is a 2300a, what displacement is that?

Thanks abunch!

Clancy

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Hello,
The 2300 compressor is 2300cc (cubic centimeters) or 2.3L (liters). That Lysholm compressor is the same displacement as Whipple W140 compressor.

As for the belt, there an easy way to figure out which one you need, and the part numbers are easy to understand.

Get an old belt and cut it. Wrap the pulleys with the tensioner compressed and mark where the belt meets itself again.
Measure the length of the belt from the end to the mark.
The part numbers with most brands are an expression of ribs and inches. The last five number of the part number will tell you this. The inches is in tenths, so 110.5 inches would be expressed as "1105". The number before that is ribs - 6, for example. A Dayco part number 5061080 would be a 6-rib belt 108.0" long.

BTW, you're in for a treat when you get that thing running on the 454.

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"James B." '99LT_Tahoe4Dr2WD, Tuned L29 Vortec 454, 62#Injectors, Cutouts, 4L80-E 10.5"14bolt ,EatonPosi-4.56:1, Gear_Vendors, HydroBoost, (NEXT: Brodix heads, 230/240 cam, SS roller rockers, longtubes, THEN: Intercooled W200R-8psi in the future...)

hey thanks for the info! I figured thats what i would have to do to get proper belts, a little bit of extra work, but everything has required a little thinking, so have you gotten a whipple on your 454 now in your tahoe? I seen the vids of your 383, sounds freakin sweet, to bad it failed on you, i imagine running 5-6lbs of boost would be a little bit quieter noise from the screw?, not that the noise isn`t cool...(:

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I don't have the 454 boosted yet, it will be. I've got two Vortec 454's, one in the truck the other one on a stand in the garage. The second one will get bored and stroked to 489 CID with forged parts, the top end will be Trickflow oval port heads with stainless roller rockers and a Lunati cam. On the exhaust side, hooker longtubes with electric cutouts. A stock intake manifold with 62# injectors is being modified with an intercooler mounted over it to be fed by a Whipple W200 (3.3L) compressor mounted on the passenger side. This will be driven by a dedicated 8-rib belt, the crank pulley for which I just got today actually. Running a 2-bar tune and 9-10psi of boost I expect 850HP from this.
I've been driving around with no boost for 14 months now and it's taking a toll on my happiness and sanity! I miss the sound but I miss the stupid amount of power that 383 made with the W140 on it most of all!

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"James B." '99LT_Tahoe4Dr2WD, Tuned L29 Vortec 454, 62#Injectors, Cutouts, 4L80-E 10.5"14bolt ,EatonPosi-4.56:1, Gear_Vendors, HydroBoost, (NEXT: Brodix heads, 230/240 cam, SS roller rockers, longtubes, THEN: Intercooled W200R-8psi in the future...)

Sounds like alot of fun! my fuel pump showed up today so hopefully tommorow i can get time to put it in, then i may be able to turn the key! although it may be breif, i still need to get an extended throttle cable, hoping to find something out of another GM truck or car that will work. i also found out that I may be working outta town for a while next week, so thats a bummer, put it will pay some bills!!

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You'll need the throttle and cruise control cables from a Vortec 350 (L31) truck. The cable end in the cruise control cable seems to be a little bit different of a diameter for the peg on the throttle body. Perhaps that part can be swapped over from the L29 cable.

Good info about the TC, I had visited both local dealers to see if they would let me search through their stock for a cable, of course they say no, but did give some time looking in the computer up front, but of course it does not list dimensions or similarities, To bad GM does release that kinda info for us hotrodders! HA, oh well I will order that cable when i get back and try it out, it would make me very happy to use a factory cable to make it look good. The cruise cable is good, that is the one thing that was included in this kit. I have a Question about the fuel pump i`m using, the factory unit had the main line outlet (high pressure) plus right beside it a small 1/8" line that returns down near the suction, the new pump has a hole there but no fitting to attach the hose, big deal? I figure it must be a pressure releif? and not hooking it up to recirc into suction probly isn`t a bad thing. letme know if you know anything, the pump is a walbro GS342. It does fit nicely otherwise into the sending unit.

later!

Clancy

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I believe that smaller outlet on the stock pump attaches to a venturi in the bucket that uses a small high-pressure flow to draw fuel from the tank up into the bucket.
I don't know how well the fuel pump bucket would stay primed without that venturi working right...

hmmmm, dang, another freakin thing to figure and fab.... getting just a tad tired of it, once everthing works i will forget it all.... (:

Do you think plastic cement will withstand gasoline? I imagine the plastic of the unit is probly some fandangled poly-etheyline composite earth junk, and standard plastic will not work? guess i`ll have to try getting a fitting in there, i can`t beleive WALBRO wouldn`t put one in then!!!!!!!! farghh, the one in the factory pump is molded right in, suppose i could cut it out but it may not fit either! I would feel better to get it on though, I`m going to look into walbro tech assistance if possible.

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Consulting their tech support sounds like a good plan, especially before making any modifications. Maybe the solution is simple.
I've got an entirely different fuel pump strategy for mine. The fuel system is going to be the same as what I ran with the 383. The stock in-tank pump is capable of enough flow, but not when boost causes the manifold pressure referenced fuel pressure regulator to push fuel pressure to almost 70psi. The same set of Siemens 62# injectors I ran with the 383 is now on the 454. Using an external fuel pressure regulator instead of the stock GM one, the baseline fuel pressure is 3-bar instead of GM's 4-bar. That way, even with boost, fuel pressure never exceeds what the stock pump can handle. All this requires extensive tuning and a 2-bar MAP sensor to go with it. It's not a practical solution for anyone without access to a complete PCM tuning system. (I was not running Whipple's electronics with the 383, stock PCM handled all fuel - the 454 will be set up the same.)