Roebling Video

[RoadconeTuning]

looks fun, those long ass turns are more complicated than they look...honestly, expected a good bit higher speeds into 1... my buddies E36 M3 with minor bolt ons was running 128 into 1 a few weeks ago.

also, that autotragic stuff is for the birds... if you're having to manually shift it anyways why not put a third pedal there so you actually have control of the car? if for no other reason than to decouple everything in the event it gets out of hand.

[gearmesh, inc.]

The Sonnax valve only applies the overrun clutch, which provides engine braking in 2nd and 3rd by keeping the forward sprag from freewheeling. Even though it will keep the overrun clutch applied in 1st gear to protect the forward sprag from enduring a shock impact when you jab back into the throttle, the low/reverse clutches in the rear of the trans still need to be applied to keep the low one way clutch from freewheeling to obtain engine braking in 1st. Engine braking in 1st can only happen when both the overrun clutch AND the low/reverse clutch is applied. In 2nd and 3rd, the low one way freewheels by design and is not needed for engine braking to be obtained in 2nd and 3rd.

I tooled around the Keisler website. Stuff is a little hard to find on there due to the website having some navigation holes, but there looks to be some very well thought out products in there. http://www.keislerauto.com/recent-ne...nsmission.html

That Keisler stuff is badass! The paddle shifters are wireless. Sounds like they have modified their valve body for true engine braking in 1st without your hands ever leaving the wheel. Pricey though, but it sure works! I can see some Corvette guys jumping on this!

[Miker]

Originally Posted by RoadconeTuning

looks fun, those long ass turns are more complicated than they look...honestly, expected a good bit higher speeds into 1... my buddies E36 M3 with minor bolt ons was running 128 into 1 a few weeks ago.

I was around 140 into T1. If I held more speed in the final sweeper I would pick up a good bit down the straight. It rained the night before and I really didn't feel like hitting grass entering the straight.

[Miker]

Originally Posted by gearmesh, inc.

The Sonnax valve only applies the overrun clutch, which provides engine braking in 2nd and 3rd by keeping the forward sprag from freewheeling. Even though it will keep the overrun clutch applied in 1st gear to protect the forward sprag from enduring a shock impact when you jab back into the throttle, the low/reverse clutches in the rear of the trans still need to be applied to keep the low one way clutch from freewheeling to obtain engine braking in 1st. Engine braking in 1st can only happen when both the overrun clutch AND the low/reverse clutch is applied. In 2nd and 3rd, the low one way freewheels by design and is not needed for engine braking to be obtained in 2nd and 3rd.

Website gives bad info then.

Source: http://transmissioncenter.net/pinhole.htm

"In addition, this Sonnax valve allows full downshift engine braking in 1st, 2nd and 3rd while the shifter remains in the D3 position. This upgrade would work well with applications using aftermarket electronic ÔÇ£paddleÔÇØ shifters."

[Miker]

Now just to figure out where they drill the hole in the valve body.

[GreebeanZ28]

Still on a stock-built-for-gm t56 here, 7 years of poweshifting goodness later. Im rather ruthless to it, no issues.

[gearmesh, inc.]

I will admit, a T56 is plenty stout for a factory chosen gearbox. There's a lot more left over meat in one to handle increased hp over stock than what the earlier T5 could handle. Once a T56 gets some bronze fork pads and a cast iron 3-4 shift fork, they last a long time.

[RoadconeTuning]

Originally Posted by Miker

I was around 140 into T1. If I held more speed in the final sweeper I would pick up a good bit down the straight. It rained the night before and I really didn't feel like hitting grass entering the straight.

[UnaBomber]

Originally Posted by FRDnemesis

In the words of Jeremy Clarkson

"A proppa manual geeerbox, none of that STooooopid flappy paddle stuff"


Mike, too bad you couldn't get one of those manual trans (with clutch) but still flappy paddle controlled; might cost as much as the car though

my flappy paddle gearbox car has no issues getting around Roebling deep in the teens on street tires

[BIRDMAN]

Originally Posted by UnaBomber

my flappy paddle gearbox car has no issues getting around Roebling deep in the teens on street tires

lol You can't compare a souped up GTR to a GTO with fappy paddles.

[dkbmxer002]

Yeah a gtr that has a transmission which costs more than an entire Gto.... Lol

[snakeplissken]

Originally Posted by UnaBomber

my flappy paddle gearbox car has no issues getting around Roebling deep in the teens on street tires

AMP next month ?

[GreebeanZ28]

Originally Posted by UnaBomber

my flappy paddle gearbox car has no issues getting around Roebling deep in the teens on street tires

They need to offer a 2wd stick option!