Circle D 1E converter and 3.91s going in! - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Rhino79 · 01-23-2013, 07:39 PM

Well, as some of you know, I am on a mission to be the first cam only car in the 10's. I ran 11.39 at 121.42 in 1400+ da and on stock gears and a very tight 3200 Yank. My 60 was only 1.74.

So now its time for more converter, and some gear. I chose the 3.91s because that should but me about 7000 crossing the traps in 4th instead of 5800 like I was with the yank. The yank was dropping to 4800-5000 on the shifts and Chris at circle d expects this converter to flash 4000 and only drop 1000 rpms on the shift. Also this new converter is a triple disk setup that I can lock at wot if needed or if it shows some gains by doing so.

Converter is in, gears are halfway done. Should get it buttoned up tomorrow and post some first impressions of the setup.

Rhino79 · 01-24-2013, 07:06 PM

Had to change the pinion shim to set the pinion about .002" deeper to get the right pattern and also I had to switch the exsiting carrier shims opposite of each other to achieve the right back lash.

3.91s in a high revving auto.......awesome. At 121 mph I'm at 6900 rpm unlocked through the new converter.

About the new converter. Its a Circle D 1E 4000 rpm triple disk. It is a new breed of converter that Chris at Circ D has developed that is supposed to be very efficient up top yet it flashes high and only drops 1000 rpm on the shift.

I think I may be the first one trying this converter and on the datalog, I have confirmed it only dropped 900 rpm from 3-4.

I am very happy with the factory 3.91s and the new converter. Hard to tell a lot on the street on the 20's but everything seems to be an improvement above the stock gear and yank 3200.

Supercharged SS · 01-24-2013, 07:09 PM

I hope you're running slicks! When you flash that bitch to 4k with 3.91's is gonna leave like the space shuttle!!

inferno camaro · 01-24-2013, 07:57 PM

Is there a big difference how it feels driving normal or have you tried that yet?

Does the converter feel really loose now?

Rhino79 · 01-24-2013, 09:00 PM

Converter is about 300-500 rpm looser at part throttle than the yank 3200 was, put part throttle feels better to me, due to the gears. 1850 rpm at 60 mph I believe.

And yes, Ill be on Hoosier 28" slicks on 17's with skinnies.

mike.nite · 01-25-2013, 06:30 AM

Rhino - congrats on your built!

I'm thinking about getting 3.91s as well (1LE Diff Assembly P/N 22806794). My current setup is:

- Mild Livernois 1C Camsahft
- TSP PRC aftermarket heads
- Lingenfelter/AAC 3.70 ring&pinion

The current 3.70 ring&pinion works perfect with my setup and is making the car noticeable faster. I have absolutely no traction problems - even at harder launches (as long as it is not raining

)

I am not drag racing - it's just my fun car. Do you think it's a good idea to upgrade to 3.91s?

http://www.camaro5.com/forums/showthread.php?t=268634

Rhino79 · 01-25-2013, 08:16 AM

Honestly, I wouldn't spend that much money for that little difference in gearing. Sure you will be able notice the difference, but it wont be drastic from what you have.

I went with 3.91s basically because my setup is going to stay n/a and I have a decent sized cam that likes to rev. If I was working with a 6700 rpm shift or less Id go with 3.70s.

MikeOD · 01-25-2013, 10:45 AM

I'm looking forward to seeing your results...are you running the stock posi still?

Rhino79 · 01-25-2013, 11:41 AM

Yes sir!

steveo9043 · 01-25-2013, 12:28 PM

10 second cam only car! I like!

Feel free to donate the old converter to me!

inferno camaro · 01-25-2013, 01:12 PM

How long before hitting the track? What are you useing for tire wheel setup?

Rhino79 · 01-25-2013, 01:30 PM

Wed for 1/8th mile and 1000 ft times, no qtr for about 2-3 weeks prolly.

inferno camaro · 01-25-2013, 01:51 PM

Man I wish I lived some place with a dragstrip open and not full of that four letter word. SNOW

Ice Demon · 01-26-2013, 03:24 PM

Can't wait to see you break into the 10's. Are going to come to MIR on the opening day Feb 16? I will be there shooting for 11's

01-23-2013, 07:39 PM	#1
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Circle D 1E converter and 3.91s going in! Well, as some of you know, I am on a mission to be the first cam only car in the 10's. I ran 11.39 at 121.42 in 1400+ da and on stock gears and a very tight 3200 Yank. My 60 was only 1.74. So now its time for more converter, and some gear. I chose the 3.91s because that should but me about 7000 crossing the traps in 4th instead of 5800 like I was with the yank. The yank was dropping to 4800-5000 on the shifts and Chris at circle d expects this converter to flash 4000 and only drop 1000 rpms on the shift. Also this new converter is a triple disk setup that I can lock at wot if needed or if it shows some gains by doing so. Converter is in, gears are halfway done. Should get it buttoned up tomorrow and post some first impressions of the setup.

01-24-2013, 07:57 PM	#4
inferno camaro Drives: 2010 camaro pace car, 2008 cts bl, Join Date: Jun 2011 Location: Indiana Posts: 841	Is there a big difference how it feels driving normal or have you tried that yet? Does the converter feel really loose now? __________________ Mods, 2r max cam, ls3 conv,kooks lt w/hf cats,kooks street sleeper cat back with magnaflow res x-pipe, roto fab cai, v-max TB, vigilante 3700 stall, 3.70 LPE, 442hp/392tq, Mike Norris Tune 11.71@116.24 1.63 60' m&h DR's

01-25-2013, 10:45 AM	#8
MikeOD Drives: 2010 M6 2SS Join Date: Mar 2011 Location: South Windsor, CT Posts: 1,202	I'm looking forward to seeing your results...are you running the stock posi still? __________________ 2010 Camaro SS M6. Heads/Cam/Intake/Headers/Exhaust/Suspension

01-25-2013, 01:12 PM	#11
inferno camaro Drives: 2010 camaro pace car, 2008 cts bl, Join Date: Jun 2011 Location: Indiana Posts: 841	How long before hitting the track? What are you useing for tire wheel setup? __________________ Mods, 2r max cam, ls3 conv,kooks lt w/hf cats,kooks street sleeper cat back with magnaflow res x-pipe, roto fab cai, v-max TB, vigilante 3700 stall, 3.70 LPE, 442hp/392tq, Mike Norris Tune 11.71@116.24 1.63 60' m&h DR's

01-25-2013, 01:51 PM	#13
inferno camaro Drives: 2010 camaro pace car, 2008 cts bl, Join Date: Jun 2011 Location: Indiana Posts: 841	Man I wish I lived some place with a dragstrip open and not full of that four letter word. SNOW __________________ Mods, 2r max cam, ls3 conv,kooks lt w/hf cats,kooks street sleeper cat back with magnaflow res x-pipe, roto fab cai, v-max TB, vigilante 3700 stall, 3.70 LPE, 442hp/392tq, Mike Norris Tune 11.71@116.24 1.63 60' m&h DR's Last edited by inferno camaro; 01-26-2013 at 04:35 PM.

01-24-2013, 07:06 PM	#2
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Had to change the pinion shim to set the pinion about .002" deeper to get the right pattern and also I had to switch the exsiting carrier shims opposite of each other to achieve the right back lash. 3.91s in a high revving auto.......awesome. At 121 mph I'm at 6900 rpm unlocked through the new converter. About the new converter. Its a Circle D 1E 4000 rpm triple disk. It is a new breed of converter that Chris at Circ D has developed that is supposed to be very efficient up top yet it flashes high and only drops 1000 rpm on the shift. I think I may be the first one trying this converter and on the datalog, I have confirmed it only dropped 900 rpm from 3-4. I am very happy with the factory 3.91s and the new converter. Hard to tell a lot on the street on the 20's but everything seems to be an improvement above the stock gear and yank 3200.

01-24-2013, 07:09 PM	#3
Supercharged SS Account Suspended Drives: 2010 Camaro Join Date: Feb 2010 Location: Sandy Hook, CT Posts: 11,927	I hope you're running slicks! When you flash that bitch to 4k with 3.91's is gonna leave like the space shuttle!!

01-24-2013, 09:00 PM	#5
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Converter is about 300-500 rpm looser at part throttle than the yank 3200 was, put part throttle feels better to me, due to the gears. 1850 rpm at 60 mph I believe. And yes, Ill be on Hoosier 28" slicks on 17's with skinnies.

01-25-2013, 06:30 AM	#6
mike.nite Drives: 2011 2SS L99, 2010 LT RS Join Date: Mar 2010 Location: NY (USA) ZH (Switzerland) Posts: 437	Rhino - congrats on your built! I'm thinking about getting 3.91s as well (1LE Diff Assembly P/N 22806794). My current setup is: - Mild Livernois 1C Camsahft - TSP PRC aftermarket heads - Lingenfelter/AAC 3.70 ring&pinion The current 3.70 ring&pinion works perfect with my setup and is making the car noticeable faster. I have absolutely no traction problems - even at harder launches (as long as it is not raining ) I am not drag racing - it's just my fun car. Do you think it's a good idea to upgrade to 3.91s? http://www.camaro5.com/forums/showthread.php?t=268634

01-25-2013, 08:16 AM	#7
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Honestly, I wouldn't spend that much money for that little difference in gearing. Sure you will be able notice the difference, but it wont be drastic from what you have. I went with 3.91s basically because my setup is going to stay n/a and I have a decent sized cam that likes to rev. If I was working with a 6700 rpm shift or less Id go with 3.70s.

01-25-2013, 11:41 AM	#9
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Yes sir!

01-25-2013, 12:28 PM	#10
steveo9043 Drives: 2012 45th AE 2SS Coupe Join Date: Sep 2011 Location: Chicago IL Posts: 1,125	10 second cam only car! I like! Feel free to donate the old converter to me!

01-25-2013, 01:30 PM	#12
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Wed for 1/8th mile and 1000 ft times, no qtr for about 2-3 weeks prolly.

01-26-2013, 03:24 PM	#14
Ice Demon Drives: 2010 Camaro SS Join Date: Oct 2011 Location: Memphis, TN Posts: 1,098 View My Garage	Can't wait to see you break into the 10's. Are going to come to MIR on the opening day Feb 16? I will be there shooting for 11's __________________ Mods: "Cam Only"