LS1LT1

iTrader: (16)

I have a stock internal/bolt ons only (headers/ORY/cutout/LS6 intake/weight reduction etc.) Z28 with 3.23s (for now, maybe 3.73s later on), mostly stock suspension and a raceweight of roughly 3400 pounds soon to be running on M/T ET Drag Radials (BFGs no longer hold with my old 2800 stall).
I want the highest stall I can get before it starts to hurt me more than help, if there even is such a thing as too big of a converter that is.
Not worried too much about street manners/driveability though the car will still be driven on the weekends once in a while.
Pretty set on PI Vigilante converters too btw.
4400? 4000?

Any input would be greatly appreciated.

1 BLOWN V8

iTrader: (17)

I went with a 3,200 but in your case and all the reading and learing I have done I would say the 4400 would be your perfect choice.

jay_99z

iTrader: (5)

This might help. https://ls1tech.com/forums/drag-racing-results/273788-quickest-stock-internals-list-11-82-bump.html

I think you'll be fine to around 4400. I could probably handle a little more (than my 4200).

LS1LT1

iTrader: (16)

Oh yeah I forgot about the list, most of the 'big guns' on the SI list are running 4000 or bigger true. Thanks.

Then there's the whole never ending Vig versus Yank debate LOL.

SUX2BU

iTrader: (14)

i ordered an 8" 4800 for my SI bolt on car. and i have 4.10's and am getting a 3.06 first gear put in my TH350.

LS1LT1

iTrader: (16)

Nice ....can ya even get an 8" converter for a 4L60E?
Must be pretty light too, I like lightweight things in my car.

SUX2BU

iTrader: (14)

actually it for a TH350

LS1LT1

iTrader: (16)

Yes I know, I was just asking if they made them that small for the stock trans as well, though I highly doubt it.

LS6 SS

get a yank i have had both they both drive the same but when it comes to racing the yank out does the vig i had a pt4400 in mine and i love it, by the way i daily drive my car too

LS1LT1

iTrader: (16)

Even when comparing the same stall numbers, ie: Vig 4400 versus Yank PT4400, Vig 3600 versus Yank SS3600 etc?

And thanks for the responses everyone.

12secSS

iTrader: (30)

No, unless you want to get rid of the lock-up clutch. The 8" converters are too small to have an effective TCC.

Matt D

iTrader: (49)

i have a tci ssf 4000, and stock internals. hits hard on the street and strip.

electricz28

these big stalls are great for getting off the line, but when your out cruising your lightly modded hot rod any speeds under 40mph the car will probably feel mushy just my .02

Ragtop 99

iTrader: (7)

Yank rates their stalls much closer to actual stall speed. Most people find a Vig 3600 stalls to 4000 or slightly higher. If you want a PI, that's what I would order.