I currently have a circle D 4c which is rated at 3600-3800 but in my car flashes to about 3700.im currently running a torquer v3(231/234 64x/59x) and have ran a best of 11.61 @ 117 with a 1.61 60' with 410's a stock intake and PRC stg 2.5 5.3 heads

Im upgrading to a ls6 or fast 92 intake and looking to restall my converter to something that will work very well with a larger camshaft such as the ms3 or ms4.

what size do you guys think would work very well with those two cams? i was thinking somewere along the line of 4000-4200. my goal is to 60 foot real low 1.40's and trap somewere in the 121-122 anything more than that will be icing on the cake.

 

You need to look more at just the converter to get to the 1.4 mark. I would concentrate on hitting 1.4s period and then go from there.. bottom 1.4s is going to be a bit of a challenge, not saying you can't get there but I would try to get close, then start shaving it down.

I would keep your cam, move to a used ported FAST 90/90 and a 4200 2.4STR converter.
That should put you in the bottom 1.5s/high 1.4s (granted you have suspension) and will give you a bit more on the top end for cheap.
If you still haven't hit your mark, work on suspension to get a better 60', or maybe look at a different set of heads (possibly cam) if you want more top end.
I think you should concentrate on the rest of the setup instead of the cam. I run a 226/228 .588 114 cam (ls6 intake hand ported/milled 317 heads 373s PTC 4000 2.4 FULL weight full BMR suspension less drag bar) and cut 1.50 short times. Hopefully next track visit it will be mid-high 1.4s.. The cold air/skinnies/dyno tune will hopefully let me hit my mark.
I guess I am saying that cam is plenty big enough to get you to your mark, and then some.

 

Thanks for the write up!

That is exactly what I planned on doing. I was going to looosen up my converter since it will be free.I have lca's and torque arm. I want to see what i can get out of it the way it sits with a much better 60'. After that is said and done I will add the intake and go from there.my main concern is my 60 foot and that has always Ben my concern. The Cam would be my last decision to make if I cannot get my 10 second slip which is what I really want. I führer I'm going to need to trap atleast 121 and 60' at least 1.48 or better so I'm missing 4mph since I'm trapping 117 right now and droppng wheigght is kinda out of the question since I don't want to strip the car up so I'm gonna need to add some power to get those 4mph.

 

Sounds good man.. I think the converter/intake/retune would be the first step. If that doesn't get you there I would get a good set of heads (AFR/PRC 215s/etc etc).. That should get you the 4mph and then some.
I see no reason at all why you would need to change the cam. That should carry you to 10s no problem.

 

Agree verter,intake an tune will get ya real close.I picked up a good amount with a fast 90/90.Then went with a fast toys 85mm lid and maf and picked up about the same.Went from 11.40s@117 to 11.15@121.Good gain in my book.

 

i guess i will keep that cam and see how it goes with the fast and bigger converter.
can someone explain what STR actually means for converters? can that be changed with a restall? i have a circle d stage 1 4c and im not sure what the STR is on it. i will be emailing chris to see what we can do with it;

 

STR= Stall Torque Ratio

STR is measured on how much the torque converter multiplies you engine torque output.

 

Converter noob. That is pretty self explanitory. I guess I'm looking for a high str but how will it effect my top end? Is there any good and bad things about a high str vs a low str for track only.

 

Click here -----> http://www.converter.com/torqueration.htm

 

4000 plus with a nice stall torque ratio. Like lemons12 said, a 2.4 STR will be nice and I think that is about the STR on his converter and it hits hard. Keep in mind, that up top, with those higher STR's you will lose top end.

 

good info there, thanks alot.

 

yea i realise that i will lose some top end but it seems a 2.4 STR will be about right since i still want goo 1/4 trap speeds.

does anybody know what the STR is on the stage 1 cirlce d 4c converters are?
can you change a STR with a restall?

 

At least a 4000 ,but a 4200 or 4400 would be best

 

what do you guys think about trading my circle D for a ypt4000 or ypt4400? would those converters hit harder than a SS4000?

 

My suggestion is a 4400 if you have no plans of spraying with a 2.2 str. If you have plans of spraying I'd go with a 4000 with a 2.2-2.5str. The harder hitting/higher str converters require better dialing in of the suspension for optimal traction.

 

i plan on a 100-150 shot the most.... isnt the ss4000 a 2.6 STR?

im really looking at the ss4000 over the PT series. i see alot more people getting some nice 60's with the ss series converter.

 

Im running the LG G5X4 cam with 4.11s and the Circle D 5C. My car is a consistent 1.43 60' car. I had the LS6 intake and swapped to a ported Fast with a 96mm TB. It didnt change my 60' any but I started trapping higher. 10.80s at 124 all day long. Id go with the ported Fast and a little bigger stall. Id highly recommend the Circle D 5c especially since youre using the 4C.

 

Minshall you have a PM... verry impressive car by the way and 60'! my car is silver also

 

Thank you. Took a fair amount of track time to get it to 60' like that. Just have patience and it will happen.