I was recommended a 3800 converter w/ the #7 pump, i couldnt quite follow what he was saying so can someone elaborate, is it built in the converter or does the tranny come apart?

 

yes it's part of the converter... I believe it's a Vigilante only term... not sure of tech info but I believe all Pump #7s give you a 3.0 STR

 

what would it run w/ a 3800 stall speed?

 

I thought #7 was a 3600??? and the 3600 has a 2.37 str i believe. Check sig for best times.

 

sorry i meant how much do they run price wise d'oh. I was planning on a 3800 stall but if its only available in a 3600 is the #7 pump make it worth going w/ a 3600? If i could pull 1.6's i'd be extremly pleased and nitrous will be on in the near future does it hold up well?

 

I have a vig3200 with a #7 pump. It's brutal. WIth my stock F1s, I can't get traction anywhere in 1st and halfway through second. Thus, my ET only droped 2 tenths. I believe the #7 has a 2.5 STR.

 

Pump #0 = 2800 (2.0 STR originally, now 2.5)
Pump #6 = 3200 2.17 STR
Pump #7 = 3600 2.37 STR

 

i would recommend a 3600 for a NA car, just don't know how well it does with the nitrous. the 3200 would probably be better for the spray. i would talk to PI about it. $700 at Speed Inc ----->

 

sweet, but it sounds like my nittos wont be enough to hold it hello slicks bye bye 10 bolt

 

ditto CamaroCain

nittos will hold just fine since both me and CamaroCain went 11's stock internals on nittos. Ive cut a 1.58 on 16inch nittos with the vig3600

keep in mind the vig3600 really usually stalls to 4000. Shift extension is back to 5200-5300.

vig3600 is perfect for NA

 

you don't have to say bye to your 10-bolt just yet, you are still just bolt-ons right? My best times were actually run on Hoosiers, but I will be participating in the Thunder Shootout this year, so I will be purchasing a pair of DR's very soon to start practicing. It is possible to launch a high stall converter on DR's for a bolt-on car, just need practice and maybe a decent suspenion setup.

 

Sounds like the converter i want. Right now theres only bolt ons on my car and dyno'd 335.9/341.9 w/ times in my sig. I have a 228/236 588/601 112 cam sittin in my garage waiting for the converter to go in before it gets installed.

 

I have a #7 pump in my Vigilante converter. It stalls to just over 4000 rpm at launch according to my Auto Tap. I ran a 1.542 60' with this converter just this past Wednesday.

Maybe this will explain the pump and it's purpose. The tranny does not come apart. Hope this isn't too wordy!

A torque converter is basically just a fluid coupling and some clutches. If you had a direct drive between the engine and tranny, it would shift hard, drive hard. Two electric fans are an example. Face the fans toward each other. Turn one on and leave the other off. The fan that is on is the engine side, the engine turns this fan, the fan that is unplugged, is the tranny side.

The fan that is running will force air (or fluid) over the blades of the other fan and cause it to turn, which is a way to transfer power smoothly between the engine and the tranny. Throw in a lockup clutch, much like brake shoes, for the tranny lockup, and you have a lockup converter. When you reach higher speeds as determined by the computer, where the torque varies much less than at low speeds, you can "lock up" the converter, which means you engage a clutch, and then the converter acts as a "solid drive shaft" for lack of a better term. The engine and TC are both spinning at the same speed, which is more efficient, but only really useful at higher RPMs/speeds. Which is why if you floor it w/the TC locked, you will notice the RPMs up just a little at first (TC unlocks) and then they jump up a lot when the tranny kicks down.

Well, in a real torque converter there is a round steel ring with vanes called the "stator" between the two fans that helps reduce that leakage and improve efficiency. Sometimes this stator is in two, or even three, pieces to improve efficiency even more.

Also, traditionally people years ago began calling two fans inside the torque converter special names.

The fan attached to the engine was named the pump. That can be confusing since there is another entirely separate unit inside the transmission case that pressurizes lubrication oil and is called the "oil pump."

The fan attached to the shaft of the transmission is traditionally called the impeller.

 

It should be noted that while the pump # is associated with stall speeds with vigilante converters, the #7 pump is also used by other manufacturers in some of their converters.

The pump will have a major impact on stall speed but is not as big a factor in STR. The Stator is an important factor in STR.

 

good info thanks. My tranny started givin me problems yesterday so it looks like the converter and cam wil all go in at the same time w/ the tranny rebuild at 46,000 miles :rollseyes: