What happened in the last run in the video? Was this when the pump failed?

 

That's what i am saying. I believe DB had answered a previous question of mine that there are people with dedicated drag cars on order when its ready.

But you are right. It seems that this gearbox can do way more than drag racing!

 

I'm curious, why does the site say no BOV recommended with the Auto?

I get that it will hold constant boost during shifts, but, wouldn't you still need one to bleed off pressure if you're in boost and lift?

Totally open to having it explained to me like I'm five.

 

I can't say for sure if it will work on the JDM model, I'd ASSume so but I don't know.

1.20 sixty foots I'd say are for sure obtainable on a 15" rim and slick, I won't do that on my car as I won't give up the Brembo's.

Yes, the trans is good for more than just a drag car. My main purpose of this car is to drive it on the street, not drag race it. I also want to autocross it, which I already did and it worked out pretty good.

 

The BOV in my opinion on an auto is worthless. The gear change is the biggest reason to have it, compressor surge slows the compressor wheel down and make it harder to re-spool, so having a BOV on a manually shifted car makes sense. With the auto it's just not needed, save yourself some money.

Yes, the last run in the video is when the pump failed.

 

Good thread and what a successful weekend! And the video isnt working or is it just me.

 

yes its still needed when throttle plate is closed. thrust bearing in turbo takes a beating without a bov.

 

But what about when you have an extremely efficient anti-surge housing?

I noticed my Tial got seriously quiet once I installed my 25g with its ported anti-surge cover as opposed to my stock turbo. The air going back to the turbo was allowed to escape back through the cover instead of binding up on the blades. Correct me if I'm wrong.

 

yes you are wrong. air escapes "out" surge port at low shaft speeds. at high shaft speed and high air flow air will be going "in" surge port.

try to imagine a turbo moving 1000 cfm at 150,000 rpm and suddenly the throttle plate closes and there is no place for that air to go. in short there is massive reverse flow trying to suddenly stop the compressor wheel.

there is no compressor surge in between shifts. its a compression release, and a big one at that.and while the auto doesnt need this release in between shifts it does need it at end of any pull.
you arent saving anything by not running a BOV on automatic when you are destroying turbos doing it.

 

Being a Buick guy for many years...........I can assure you the turbo is not going to be damaged from not running a BOV on it with an auto, hell for that matter I've never seen one damaged from no BOV on a 5 speed either. So I completely disagree.

 

David, doesn't the converter being loose mean the revs drop like crazy when you let off the throttle? Then the revs have to jump way up coming back on the throttle to get back on the converter, causing a pretty large delay in power initially and then a hard surge of power all at once?

Seem like that would wreck havoc on handling at the limit to me?

I guess if you got left-foot braking down well it might be more controllable though?

 

No, that's nothing like what happens actually. The converter isn't so loose that it does what you are describing, it's not like a snowmobile clutch, it's very smooth and not a "free rev" type loose.

 

On my auto Ive never once heard my BOV release any air whatsoever...Looks like it was a waste but I would have to run my car without it to be 100% certain

 

When will this kit be released to the public?
How much would it cost to go with an auto trans? If not a secret . Ball park numbers just in case its affordable to the regular joe smith working out of his garage so we can start saving up.
My 5 speed took a dump and watching your car go down the track made me wet =P

 

Price is approximately $7,000 for the kit. The first trans for a customer is being built now. We are talking with the casting company now to have the castings started but it seems they aren't in a hurry. We are also looking for more cores to build from but they are also extremely hard to find. So the process has begun and we are doing the best we can. Nick Andy will be the first to get a trans and that should be fairly soon. Matt Smith is right behind him and then I have about 11 others who have their names in with me to contact them as we can build them.

Today Dave got the trans put back together for my car. We had to machine a new input shaft too while we were at it, so this trans is going together with an experimental input shaft, the converter has been fixed, used pump and a new flexplate to gain the clearance we need to not have another pump failure. The flex plate is marginal but we are going to give it a shot because we need to get more runs/miles on this set up to make sure we can sell them. I'll be having flexplates built to sell with the kits that are SFI approved, Kiggly Racing will be supplying them.