I just had a Precision Vigilante converter, rebuilt and re-stalled by them last week. It is a 9.5" multi disc setup that was originally a buddies 4k stall. I asked for a 3600 stall and explained, that I wanted it as tight as possible, if it was even possible. I came up with the 3600 number by talking with owners with similar setups and the fact that Texas Speed recommends at least a 3k stall for this cam. I called Precision this morning and they have the stall set to 2400 (it can be higher depending on hp) since it best suits my daily driver status and nitrous needs. Not sure if they are right, but why would TS make a recommendation for there cam. I know after two tuners the car still surges and bucks now with the no name 2800 stall I have behind that cam. The car has very few mods: Ported heads, TSV2 cam, LT's, X-pipe, 3" exhaust and a 100 shot I have yet to hit or tune for. The car makes 386whp without nitrous. Just wondering if I will be good or if it will be worse than ever with that low a stall.

 

We have the same cam from COMP 232-234 .595"-.598" 112 LSA. We're using a 3200 stall 9.5" Protorque converter and it's perfect for the combination.

Frank

 

That is good to know...the question is, will mine be a bag of ***** with the 2400 stall. Is this a race car or street car.

 

Anyone?

 

a 2400 stall is way too tight for that cam. I'm not sure why they went to 2400 when you asked for a 3600. They could have easily upped the str rate and still mantained the 3600 rating...

Anyway vig stalls tend to be a little on the loose side anyway I would bet that stall is more like a 2800. However you arent pushing crazy hp through it to make it act bigger and to boot a corvette is pretty light which will also make it feel tighter. You could chance it but imo it will be too tight.

You should also keep in mind that TV2 on a 112 lsa will have 9 degrees of overlap so when the stall enters lockup or low rpms you still may have surge. At a certain point there just isnt anything you can do about cam surge.

 

Why not just ask them to set it up the way you asked, 3600.

 

I spoke with Jack and he stated since this was not a car that would see the track more than once a year and was a daily driver that this would be best. I found out his decision after the converter had been shipped. He said just try it and see what happens. My issue it, it costs money to drop the trans, install the converter, reinstall the trans, then have it tuned. If it does not work for my combo, I then have to reverse all that work and the restall is not free since it's a used stall I had them rebuild back to their specs. So I have to shell out another $270. Really on the fence about this.

 

I would set it to at least 3600. Thats what will be needed to make use of that cam. Otherwise, what was the point of putting that cam in? Sure you're going to sacrifice a little fuel economy and deal with some converter slip on acceleration. But you guys go with big cams in street cars... this is what it yields... You want to hinder your setup now by going with a stall to low for the cam? You will live with not enough torque "ever" when you want it. Its like pressing the peddle down and saying "wait", let the rpms climb slowly into the power-band... ok here it comes... whoohoo! now I have power! By then you got spanked by the mustang driver that was giving you crap. Im sure a 2400 will hit alright while already cruising down the road. But from a stop, forget it. You are giving up all your torque that that cam could be providing if it was only given the right to operate in its power-band from the second you hit the gas. Just my .02

Heck, I have a little 220/228 cam and a 3200 stall thats not enough!!! It needs at least a 3800 to make use of it. You need a 4000+ for yours. But 3600 or 3800 would be my recommendation for the street. I only have this weak converter because I listened the "experts" saying 3200 for a street car. I needed at least 3600 and I will be putting a 4000 stall in because it see the strip a lot. But youre looking at less than even a 3200 for an even bigger cam... I wouldnt do it.

 

I appreciate the input Nuke. You lost me on the Mustang reference though. Different user I assume.

 

I was just saying anyone that wanted to race would have a pretty easy time taking you off the line. Especially another modern V8. A correct stall converter will give the same effect as the factory converter to the factory cam (Power band immediately). But obviously light throttle in daily driving will not be like factory. That is the sacrifice of an automatic. The best thing to do to a street car is a smaller cam (thus smaller converter) that will keep the torque up and in essence, give you more usable power than your large cam is giving. Smaller cams will give more torque for street use and allow less stall.

 

You put that 2400 stall in and you will not be able to stay stopped at the red light. It happened to me and it's scary, car just keeps inches forward.

 

^^^true too. that stall is too tight for that cam. It will lunge forward when putting it in drive and be hard to keep stopped at a red light.

 

I will keep you posted on how it behaves. My tuner thinks he can make it play nice. I actually bought the car with that cam from a fellow military member. He was sketchy about the quality of the converter hence why I got a rebuilt one from a reputable source. It might be smarter to pull the cam and put a smaller one in, but that is not what I asked for.

 

I would not downgrade the cam for that stall converter. Ls engines even in stock for like a bigger stall. An ls no matter what torque will ALWAYS make its peak torque around 4600 rpm no matter the cam. Even with the stock cam a 3600 stall will be leaps and bounds better than a 2400 bec ause it brings you much closer to peak torque on the initial hit. Generally for an all out race application you want to be within 500 rpm of peak torque or so, obviously on a street car that would be a very large stall. Some people dont mind a 4k+ stall and as so they generally get the best performance, 3600 isnt far behind then 3200 etc.

My point being is that it would be foolish to downgrade the cam as a tv2 is a great driver, and even if you do go to a smaller cam you will lose power and still not take full advantage because the stall is just too small. Vig stalls tend to run loose a 3600 is actually more like a 4k 2400 is more like 2800 etc. Therefore I think you would be fine with a 3200 vig, anything else I'd go 3600 or go 3600 on the vig for the best performance its up to you.

Not only would a cam cost more to install and retune but again you will lose performance. I would tell them no way on the 2400 and just get it at 3200. Driving a stalled car is almost unnoticeable after a few days. You wont be sorry you went a little bigger, but you will be sorry if its too tight and drives like crap and is slow as *****

just my .02

 

Like I said, 3200 is too low for me and I have an even smaller cam. You need at least 3600. But I've said my piece. Good luck on your decision.