you crack me up 
Anyone running an 8" converter?
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From: Chicago, IL
Anyone running an 8" converter? I have my TH350 on the way and was wondering if anyone is running an 8" verter in their 3 speed.
if so, who's converter and why did you chose an 8" over a 9"?
if so, who's converter and why did you chose an 8" over a 9"?
i run an ati 8 inch converter! to be honest with you it was what we had laying around it works great a little low on power on the dyno but it was a bit big for my set up but 60'd real well for what it was and held up! but im sure all the gusy on here are gonna tell you to do an tct. i run it in a turbo 400 and i drive it on the street it goes to 4500 on the break on hp
Launching!
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From: Elwood, IL
I run a 8" Coan converter. There really wasn't a reason I picked the 8 over the 9. Do know that it is second to none in quality. I have 60's that are VERY constistant all day long. Within .000 and .005 most days. Very happy with it. OH yeah and its a Turbo 400 w/ brake.
Ken
Ken
We run a B&M Quick 60 8" converter in our Z28. Why, because I work there! 
Seriously, because it is less recipricating weight and allows the engine to spool up faster. Plus, these converters are specifically designed for bracket race cars (either full body or rail dragsters). Unfortunetly, we can't check the efficiency of it because it is a non lock up converter 
, but who cares, it's a race car. 
Seriously, because it is less recipricating weight and allows the engine to spool up faster. Plus, these converters are specifically designed for bracket race cars (either full body or rail dragsters). Unfortunetly, we can't check the efficiency of it because it is a non lock up converter , but who cares, it's a race car. 
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From: Hot Rainy Humid +2000 DA South Florida
I have several 8" converters, I am currently using a TCI 8" 5500 stall with a TH400. The reason I chose an 8" converter is because I found it stalls faster for racing a pro tree. I race NHRA Super Gas as well as all the LS1tech races and I also race Super Pro and Pro foot brake brackets. After I stage both my bulbs I hold the brake when my opponent stages both I go WOT, the 8" has always flashed instantly to my 2 step setting, usually 3600 RPM. When I drop the button the car launches and the rpms flash instantly from 3600 to +5500, right as the car is pasing the 60' the RPM's are screaming to 7500, I hit 2nd gear. The 8" has always gotten to my peak power band faster than the 9" I have. My average 60's are 1.32, I have gone several 1.300s but haven't bagged my 1.29 60' yet. I plan to do that this season.
Lee
Lee
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well, I'm not looking for bracket anything.. I just need ET. MPH is not a concern.. I just need ET.
I just need a verter that will run 10.3's in the cam only form.
My rossler TH350 is on its way, with t-brake.. They recomended a 8" converter..
I just need a verter that will run 10.3's in the cam only form.
My rossler TH350 is on its way, with t-brake.. They recomended a 8" converter..
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From: Chicago, IL
Well you guys really aren't selling me on the 8" ..
I just want to know if the 8" will make my car go quicker than a 9".. and I'd like to hear from LS1 owners that were in similar situations and had to chose, and why they chose the way they did.
Need to crush the current cam only record.
..I just want to know if the 8" will make my car go quicker than a 9".. and I'd like to hear from LS1 owners that were in similar situations and had to chose, and why they chose the way they did.
Need to crush the current cam only record.
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From: Hot Rainy Humid +2000 DA South Florida
Originally Posted by Magnus
Well you guys really aren't selling me on the 8" ..
I just want to know if the 8" will make my car go quicker than a 9".. and I'd like to hear from LS1 owners that were in similar situations and had to chose, and why they chose the way they did.
Need to crush the current cam only record.
..I just want to know if the 8" will make my car go quicker than a 9".. and I'd like to hear from LS1 owners that were in similar situations and had to chose, and why they chose the way they did.
Need to crush the current cam only record.
So as far as ET goes.. I was running 10.90's with a best 60' of 1.42, when I only changed the converter I cut my short times dramatically. The car started cutting 1.36-1.38 60's consistantly. The better 60's as well as the higher shift extensions in 2nd and 3rd brought my car from 10.90s to the 10.60s NA.
In short.. if you want to run fast N/A do some research and find out where you want to trap your rpms, get a +5000 8" stall converter/tire/gear combo that will let you cross at peak rpms, cam only would be what 6900? etc
I found that when I put the 8" in my rear gear was too small and I was losing ET from a low shift extension. I changed the 4.30 to 4.73 that made a world of difference.
IMO a NA drag car = Light Weight Chassis/Good Suspension + Big Tires + Big Gears + Big Stall
Lee
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From: Texas
Originally Posted by Magnus
I have my TH350 on the way and was wondering if anyone is running an 8" verter in their 3 speed.
if so, who's converter and why did you chose an 8" over a 9"?
if so, who's converter and why did you chose an 8" over a 9"?
Originally Posted by FEAR THE LS1
Well since you put it that way.... Long ago with my H/C 346 I was running a 9" converter that was a 4000 stall on the street/strip. When I started to do more racing I wanted to go faster at the track, and do it all motor. The best thing you can add to your drag car is a big stall converter for drag racing. I took a look at all the Stock Eliminator guys, they have a minimum of a 5000 stall in their car. So I started looking around for a 5k stall converter, the highest stall I could get in a 9" was like 4800. In order to get a stall of 5500 which is what I wanted, I had to go 8".
So as far as ET goes.. I was running 10.90's with a best 60' of 1.42, when I only changed the converter I cut my short times dramatically. The car started cutting 1.36-1.38 60's consistantly. The better 60's as well as the higher shift extensions in 2nd and 3rd brought my car from 10.90s to the 10.60s NA.
In short.. if you want to run fast N/A do some research and find out where you want to trap your rpms, get a +5000 8" stall converter/tire/gear combo that will let you cross at peak rpms, cam only would be what 6900? etc
I found that when I put the 8" in my rear gear was too small and I was losing ET from a low shift extension. I changed the 4.30 to 4.73 that made a world of difference.
IMO a NA drag car = Light Weight Chassis/Good Suspension + Big Tires + Big Gears + Big Stall
Lee
So as far as ET goes.. I was running 10.90's with a best 60' of 1.42, when I only changed the converter I cut my short times dramatically. The car started cutting 1.36-1.38 60's consistantly. The better 60's as well as the higher shift extensions in 2nd and 3rd brought my car from 10.90s to the 10.60s NA.
In short.. if you want to run fast N/A do some research and find out where you want to trap your rpms, get a +5000 8" stall converter/tire/gear combo that will let you cross at peak rpms, cam only would be what 6900? etc
I found that when I put the 8" in my rear gear was too small and I was losing ET from a low shift extension. I changed the 4.30 to 4.73 that made a world of difference.
IMO a NA drag car = Light Weight Chassis/Good Suspension + Big Tires + Big Gears + Big Stall
Lee
I think this answers your question my brother.
Coach
You really need to have a converter built specifically for your combination instead of just saying I want a converter that stalls so and so. Dyno numbers are good to have so they know your torque peak and how much power you have.
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From: Texas
Originally Posted by Pro Stock John
If he shifts it at 7100, made around 430rwhp, how big of a converter would you guys get? Sounds like ATI can get one out in 2 days.
maggie
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The problem is I'm getting mixed information from converter manufacturers, and also getting information that is proven.
For example, Lee has setups that are proven.. I would go off what he says more so than I would that does not do many setups like Lee and I.
For example, Lee has setups that are proven.. I would go off what he says more so than I would that does not do many setups like Lee and I.