is a converter recommended with a cam??
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
"I have the Yank SY3500, 323 gears, Long tubes ( ofcourse) & i am going with the Comp XER 220/581 @ a 114 LSA.
Perfect for my set up.. Wouldn't you say Col.???"
Yup, sounds good.
You'll want a harder hitting converter if you run drag radials or stickier at the track.
Perfect for my set up.. Wouldn't you say Col.???"
Yup, sounds good.
You'll want a harder hitting converter if you run drag radials or stickier at the track. 
On The Tree
Joined: Dec 2003
Posts: 124
Likes: 0
From: Detroit, MI.
I have mods below and the stock TC. This is an LT1 so I don't know how much different an LS1 would be. Anyway, the brakes hold it fine. Around town is fine also. This was a big concern for me and I thought the 224/230 lsa 112 was going to be border line for this. It's not. Wish I did the 227/233 cam. The car will go on "cruise control" and slowly go up to 1500 rpm up to about 20mph if you let off the brakes from a stop. It comes on very slowly though.
Idles great at 900 rpm.
Idles great at 900 rpm.
Staging Lane
Joined: Jan 2002
Posts: 75
Likes: 0
Ok, I have a YTP4400 with 3.46 gears, running a Grand Am cam kit.
Personally I think the 5600SE I get with this converter sucks ***. I'd be much happier with 4000 - 4500 max SE. The cam makes good power from around 3500rpm and comes on strongfrom 4000rpm.
I had a SS3800 converter with my stock engine and loved it. I thought the YTP4400 would work awesome with my current engine combo, but all it really seems to do is waste rpm. I shift at 7k, get 5600SE and around 1400rpm slippage at that shift rpm. It feels like the car pulls harder with the converter locked from a lower rpm than the converter unlocked at a higher rpm.
Would a PY3400E or PY3600E be better for my application?
Would like your opinions Colonel and Ragtop 99. Thanks.
Personally I think the 5600SE I get with this converter sucks ***. I'd be much happier with 4000 - 4500 max SE. The cam makes good power from around 3500rpm and comes on strongfrom 4000rpm.
I had a SS3800 converter with my stock engine and loved it. I thought the YTP4400 would work awesome with my current engine combo, but all it really seems to do is waste rpm. I shift at 7k, get 5600SE and around 1400rpm slippage at that shift rpm. It feels like the car pulls harder with the converter locked from a lower rpm than the converter unlocked at a higher rpm.
Would a PY3400E or PY3600E be better for my application?
Would like your opinions Colonel and Ragtop 99. Thanks.
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
"3.46 gears"
That's an odd ratio!
If you have a setup that has you pulling all the way to 7000, you would absolutely shoot yourself in the foot if you ran a converter with a lower SE than you have now. For best ETs you are possibly UNDERstalled. You're certainly not overstalled.
How a car feels and how it performs at the track are two different things oftentimes. Consider that internally stock engines have been PROVEN without a shadow of a doubt to perform best with 4200-4400 stalls. These engines shift at only 6300 or so. No higher than 6400. Don't get confused by the "my engine makes good power down there so I'm wasting power if I'm not using those RPMs. That's not logical if you think about it. You make BETTER power UP there. Sure, there's light away from the center of the spotlight. But it's brightest in the middle! So focus your RPM range where the HP is brightest.
Take a good read at some of the posts I've made recently discussing shift points and shift extensions. Bottom line, you want to focus on getting into your maximum RWHP RPM range and keeping it there the best you can. A lower SE will pull you right out of your power (notice I said POWER, not TQ. We're not looking at TQ here nor should we be.)
That's an odd ratio!
If you have a setup that has you pulling all the way to 7000, you would absolutely shoot yourself in the foot if you ran a converter with a lower SE than you have now. For best ETs you are possibly UNDERstalled. You're certainly not overstalled.
How a car feels and how it performs at the track are two different things oftentimes. Consider that internally stock engines have been PROVEN without a shadow of a doubt to perform best with 4200-4400 stalls. These engines shift at only 6300 or so. No higher than 6400. Don't get confused by the "my engine makes good power down there so I'm wasting power if I'm not using those RPMs. That's not logical if you think about it. You make BETTER power UP there. Sure, there's light away from the center of the spotlight. But it's brightest in the middle! So focus your RPM range where the HP is brightest.
Take a good read at some of the posts I've made recently discussing shift points and shift extensions. Bottom line, you want to focus on getting into your maximum RWHP RPM range and keeping it there the best you can. A lower SE will pull you right out of your power (notice I said POWER, not TQ. We're not looking at TQ here nor should we be.)
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TECH Enthusiast
iTrader: (10)
Joined: Aug 2002
Posts: 720
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From: Arlington, TX Congestion City
Originally Posted by VT2 EXEC LS1
So what engine would suite a PY3600E? That's what I had in mind. The lower STR would definately suite the car better too. Traction is a real issue with an IRS setup fitted to the Australian cars.
That is a n2o converter! Anyone engine with spray. The more the merrier.