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Old 05-15-2022, 07:05 AM   #29
Yosh6
 
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Originally Posted by Murder6.2 View Post
So I noticed something that’s throwing me off, my converter doesn’t lock up until 3rd gear, I can tell the rpm drop when it locks is really slowing down the car, I did some lurking on Prays IG and noticed all his converter cars lock up in 2nd gear which makes more sense to me, 2nd gear pulls a lot harder than 3rd gear, so staying in 2nd for longer makes a lot of sense.
I also have a draggy and always record my 40-100 50-100 and 60-100 and there’s about a .2-.3 difference on the street where the converter is locked for rolls and the track where it doesn’t lock up until 3rd. I’m going to ask him about this.

In reading your posts I didn't see where you installed the Circle D converter. Can't imagine you doing those 60's with a stock converter. Sounds like you may have the same Circle D that I have, a 3EX. It has a flash stall speed of 4,100 rpm and it is tuned for TCC lockup in third gear at 5,500+/- RPM (60 MPH with my gearing). Don't understand how you can command TCC lockup for roll in any other gear, RPM or speed on the fly? Are you actually talking about flash stall speed? If so, that cannot be changed without changing the stator. At TCC lockup in third gear it should not "slow down" the car at all. The RPM will drop slightly and the only way I can tell it happened is by the engine sound; very subtle, sounds like a close-ratio gear change. No MPH drop at all. If you are having a MPH drop anywhere in the run, something is wrong. I was thinking about changing the TCC lockup to 4th gear on the theory that the transmission would spend less time in the weakest gear, fifth. Brett talked me out of it saying he had done "extensive testing" on lockup and third gear is the best. I trust his advise a lot more than my theories. This converter should be launched at 2,500 RPM; 3,000 RPM (better if you can hold it). Unlike the stock converter launched off idle. That is an attempt to "flash" the converter (get it to flash stall at a higher RPM than its design (1,800-2,200 RPM). No need to do that with the 3EX. You'll never see 4,100 RPM with your foot on the brakes (Unless the rears are smoking!).
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Last edited by Yosh6; 05-15-2022 at 07:53 AM.
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Old 05-15-2022, 06:47 PM   #30
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In reading your posts I didn't see where you installed the Circle D converter. Can't imagine you doing those 60's with a stock converter. Sounds like you may have the same Circle D that I have, a 3EX. It has a flash stall speed of 4,100 rpm and it is tuned for TCC lockup in third gear at 5,500+/- RPM (60 MPH with my gearing). Don't understand how you can command TCC lockup for roll in any other gear, RPM or speed on the fly? Are you actually talking about flash stall speed? If so, that cannot be changed without changing the stator. At TCC lockup in third gear it should not "slow down" the car at all. The RPM will drop slightly and the only way I can tell it happened is by the engine sound; very subtle, sounds like a close-ratio gear change. No MPH drop at all. If you are having a MPH drop anywhere in the run, something is wrong. I was thinking about changing the TCC lockup to 4th gear on the theory that the transmission would spend less time in the weakest gear, fifth. Brett talked me out of it saying he had done "extensive testing" on lockup and third gear is the best. I trust his advise a lot more than my theories. This converter should be launched at 2,500 RPM; 3,000 RPM (better if you can hold it). Unlike the stock converter launched off idle. That is an attempt to "flash" the converter (get it to flash stall at a higher RPM than its design (1,800-2,200 RPM). No need to do that with the 3EX. You'll never see 4,100 RPM with your foot on the brakes (Unless the rears are smoking!).
I have a 4EX from the logs it looks like it flashes at 3600ish rpm.
Iíve tried a few different launches and my 1.45 came at 2200RPM. The 1.48 came at 2300 RPM. Next time out Iím going to try 2000 and work my way up 100 rpm at a time. Brett did say that 2500 is going to net me the best 60í possible if I do the brake hold thing, which Iím still confused about lol
I emailed Brett yesterday and asked him about 2nd gear lock up Iíll see what he has to say, only reason I even thought about it is because I got the converter 2nd hand and my buddy who ran it had his lock up in 2nd gear, I have a video of his run, his car ran 6.8@100 with a 1.46 60í.
I have the TUTD tune and it will definitely lock up in 2nd gear in manual mode, the rpm drop on the shifts goes from 6500rpm to 5200rpm, and on the track the drop goes from 6500 to 6000 on all the shifts except when the converter locks up itíll drop to 5200ish. I guess I just have to wait and see what he says.

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Old 05-18-2022, 07:01 AM   #31
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I installed the Ported Lt1 intake or TB but pulled it back off before we dynoed, put the stock intake and tb back on and sold the ported TB. Decided to wait and buy a 95mm ported TB and may sell the ported Intake and do an Msd or Lt2. I did find a stock 95 and bought it but hasn't arrived yet so I may just have it ported or run it stock once I decide on the Manifold.
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Last edited by laynlo15; 05-18-2022 at 07:41 AM.
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Old 05-21-2022, 03:00 AM   #32
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I installed the Ported Lt1 intake or TB but pulled it back off before we dynoed, put the stock intake and tb back on and sold the ported TB. Decided to wait and buy a 95mm ported TB and may sell the ported Intake and do an Msd or Lt2. I did find a stock 95 and bought it but hasn't arrived yet so I may just have it ported or run it stock once I decide on the Manifold.
Iíve tried the (Pray) ported stock manifold, LT2 manifold (non ported) and ported MSD, so far my favorite has definitely been the LT2 best bang for buck forsure. My car pulled very strong with it I didnít notice a difference going from the stock TB and stock LT2 to the ported MSD/95mm tb combo if Iím being honest.
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Old 05-21-2022, 07:17 AM   #33
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My car pulled very strong with it I didnít notice a difference going from the stock TB and stock LT2 to the ported MSD/95mm tb combo if Iím being honest.
i thought i was the only one. my car picked up a little bit over 100 mph but the 30-100 times were within hundredths of a second. difficult to be consistent with an m6 but i have a lot of dragy history with each setup haha.
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Old 05-21-2022, 07:21 AM   #34
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On my C7 I went from a ported Lt1/ported 87mm. Went to a ported MSD and lost ET but picked up MPH. It took a little more time to get the MSD dialed in but we finally picked up a 1/10 from 11.00 to 10.90 but overall picked up about 3 mph at 128 mph and some change. So your still running the stock lt2 manifold and stock TB. Pretty impressive I'd say.
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Old 05-21-2022, 09:54 AM   #35
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Sorry just noticed you are running the MSD
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Old 05-21-2022, 04:41 PM   #36
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i thought i was the only one. my car picked up a little bit over 100 mph but the 30-100 times were within hundredths of a second. difficult to be consistent with an m6 but i have a lot of dragy history with each setup haha.
I kind of regret making the switch, oh well at least I got a decent deal and wonít lose too much money if I ever decide to sell.
I track my 40-100 50-100 and 60-100 times and hardly noticed a difference. If anything actually helped with those times it was the aerospace brakes and weight reduction Iíve done shaved off about .2 of each.
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Old 05-21-2022, 04:43 PM   #37
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Murder, are you tuning your own Camaro?
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Old 05-21-2022, 04:45 PM   #38
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Originally Posted by laynlo15 View Post
On my C7 I went from a ported Lt1/ported 87mm. Went to a ported MSD and lost ET but picked up MPH. It took a little more time to get the MSD dialed in but we finally picked up a 1/10 from 11.00 to 10.90 but overall picked up about 3 mph at 128 mph and some change. So your still running the stock lt2 manifold and stock TB. Pretty impressive I'd say.
I don’t suggest a MSD for a bolt on car not enough gains over a LT2 to justify the cost IMO. I know on the C7 you can’t run the LT2 manifold but I highly recommend a LT2 manifold on a 6 gen if you plan on just staying bolt ons. I got mine from GPI. With that $800-900 price difference I’d get a set of longtubes.

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Old 05-21-2022, 05:54 PM   #39
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On my new Camaro I can and currently looking for one. I already have a 95mm TB so I'll run across one in the next month or so. I agree I wouldn't invest in an MSD again. I have that Lt1 ported I may put back on since I picked up this 95mm TB. Easy swap.
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Old 05-21-2022, 06:39 PM   #40
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On my new Camaro I can and currently looking for one. I already have a 95mm TB so I'll run across one in the next month or so. I agree I wouldn't invest in an MSD again. I have that Lt1 ported I may put back on since I picked up this 95mm TB. Easy swap.
I do think a stock LT2 manifold is a nice upgrade over a stock or ported stock manifold mine went from 96mph in the 1/8 with the ported stock manifold to 97.5mph and that was with the stock TB and stock air box with a drop in filter.
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Old 05-21-2022, 06:40 PM   #41
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Murder, are you tuning your own Camaro?
Tuned by Pray.
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Old 05-23-2022, 09:03 AM   #42
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Is pray saying to stick with a stock air box for lbo cars? Maybe modded air box?
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