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He thinks there is not enough oil pressure or flow iam not sure which one which is screwing with the converter it should climb a little more power wise iam just happy i have got onto someone that has the time to help get it right as it is all trial and error to get it bang on he has said once its right i cant change turbo's as the converter will need to be changed
he thinks he left the stock MX5 oil pump in the box he will upgrade it to the Holden VL Turbo model which is the car they build these boxes for or modify the stock one which iam not sure of what entails he is also going to tweak the converter as he has said it may be a little loose
Could you get me the contact info for the guy building your auto? I'd like to get in touch with them.
Also, if you get any more info on what the difference is between your current pump and what they change it to or modify it, I'd love to know. Port it to flow more? Or raise pressure? Or just a bigger pump for more volume/pressure?
Could you get me the contact info for the guy building your auto? I'd like to get in touch with them.
Also, if you get any more info on what the difference is between your current pump and what they change it to or modify it, I'd love to know. Port it to flow more? Or raise pressure? Or just a bigger pump for more volume/pressure?
my friends who have experience in drag racing say the more power the taller you go for more mph as you have the power to hit limiter with shorter ratio's
and if you look at the ratio's of the jatco i needed more legs
i could be wrong i bought the 3.63's when it was manual i may go back to 3.9's depending on how it goes on the track i just spoke to my auto builder asking about the thing revving to 6,800 rpm he said some cars do it they build your converter to the cars specs there are two ways to check mph on the track and Dyno and check rpm vs wheel speed
the rule of thumb is you want to cross the finish line asclose to redline as possible. My math with a 24.1" tire, 7000 rpm, and 3.63 gear comes out to 138mph. If your car is not capable at trapping at that speed, you have too tall a gear. My suggestion is get all the bugs worked out, and send the car down the strip to see what it traps at, then change the gear to what is appropriate.
I messaged him a week ago but never heard back. Just messaged him again. I sent him these two vids of my car cars auto in boost at 20 PSI.
How does this compare vs the auto you had built? Mine slips on the 1-2 gear change, but seems fine on the 2-3 change. Once in 2nd it holds 20 PSI no problem.
I messaged him a week ago but never heard back. Just messaged him again. I sent him these two vids of my car cars auto in boost at 20 PSI.
How does this compare vs the auto you had built? Mine slips on the 1-2 gear change, but seems fine on the 2-3 change. Once in 2nd it holds 20 PSI no problem.
the difference is night and day every gear change is firm direct and quick but that is what you would expect on a manualised built gearbox the only issue i was having is power loss which i should have fixed when the the box back next week
my auto guys only specialise in Jatco's so the Ln471b only
when i get mine back next week i will put my go pro up and video the dash how did you video yours ?
That acceleration ! my gawd! how much boost was that?
If that was directed at me, wastegate 20 PSI. I have a bigger turbo up front now so it's a lot stronger per lb of boost vs before. This hits 55% duty on my injectors at redline at this boost level.
the difference is night and day every gear change is firm direct and quick but that is what you would expect on a manualised built gearbox the only issue i was having is power loss which i should have fixed when the the box back next week
my auto guys only specialise in Jatco's so the Ln471b only
when i get mine back next week i will put my go pro up and video the dash how did you video yours ?
Interesting. Yeah I think I'm going to buy a low mileage auto and either swap it in, or just build it and then swap it in. Do you know if the guy that did yours deleted the accumulators? Or just modded them?
I talked to one auto company that builds performance transmissions and he quoted me a pretty high price and said he could only guess that it might hold 350whp. Not confidence inspiring. Going to call level10 on Monday, I called and they said he won't be back till next week.
I just filmed mine by holding my phone with one hand.
Interesting. Yeah I think I'm going to buy a low mileage auto and either swap it in, or just build it and then swap it in. Do you know if the guy that did yours deleted the accumulators? Or just modded them?
I talked to one auto company that builds performance transmissions and he quoted me a pretty high price and said he could only guess that it might hold 350whp. Not confidence inspiring. Going to call level10 on Monday, I called and they said he won't be back till next week.
I just filmed mine by holding my phone with one hand.
i have no idea what they do i believe automatics are a black art so i don't ask questions i just pay the experts
and mine also was not cheap but to get a reliable setup i was willing to pay the money how much did they quote you for 350hp ? id go a jatco my guys rate the box for 460hp on the 4 speed and alot more on the 3sp
yeah i tried to hold the phone there and iam too worried about when it shifts gears 1-2nd guaranteed to spin tyres 2-3rd on low depending on the surface and that is only with 199rwkw on low boost
i have no idea what they do i believe automatics are a black art so i don't ask questions i just pay the experts
and mine also was not cheap but to get a reliable setup i was willing to pay the money how much did they quote you for 350hp ? id go a jatco my guys rate the box for 460hp on the 4 speed and alot more on the 3sp
yeah i tried to hold the phone there and iam too worried about when it shifts gears 1-2nd guaranteed to spin tyres 2-3rd on low depending on the surface and that is only with 199rwkw on low boost
3,200 USD parts and labor (4,211 Australian dollar) if I ship them a trans to build, plus shipping back to me, and when I asked him how much it would hold once he built it he said "I can only guess, 350?" Not what I was looking to hear. Would like to know that it will be strong and not break, not a guess at what it might hold... I don't mind paying for good work if I KNOW it's good work and going to solve my problem.
3,200 USD parts and labor (4,211 Australian dollar) if I ship them a trans to build, plus shipping back to me, and when I asked him how much it would hold once he built it he said "I can only guess, 350?" Not what I was looking to hear. Would like to know that it will be strong and not break, not a guess at what it might hold... I don't mind paying for good work if I KNOW it's good work and going to solve my problem.
well mine was $4,000 AUD to build including converter i think they may have under quoted the work they have to do all iam hearing is time for a Jatco can you get them in the states they are out of eunos import here is Australia ?
I think I'm just going to build a 99 trans myself unless Level 10 says they can build one that will hold 400-500 reliably. I don't want to pay 3,200 + shipping both ways + tax = way over 4,000 USD for something that might hold 350.
If that does not work, Jatco. Hopefully they guy building yours will email me back.
On your box is that 460 flywheel hp or 460whp it's rated for?
I think I'm just going to build a 99 trans myself unless Level 10 says they can build one that will hold 400-500 reliably. I don't want to pay 3,200 + shipping both ways + tax = way over 4,000 USD for something that might hold 350.
If that does not work, Jatco. Hopefully they guy building yours will email me back.
On your box is that 460 flywheel hp or 460whp it's rated for?
all there stuff is in RWKW's mine is rated for 350 rwkw dont forget torque is the thing that breaks stuff that is a rating from a heavier car and 3ltr 6cyl turbo so my theory is can go a fair bit higher in a mx5/miata
350RWKW is 470whp. And my guy guesses at it maybe taking 350whp. Big difference there. I built so many things by now I don't see why I can't build an auto too.
i have the auto back the converter has been changed and the auto has had some precautionary mods done by my auto builder who is an absolute legend its almost bolted up iam just checking clearance's then it will be getting driven straight to a dyno to see the results
Good luck! I could never get ahold of the guy that's doing yours. I just bought a built C4 ford trans and am going that route instead. I'm on my second miata auto now and it's slipping at 25 psi with a few basic mods done to it.
i have the auto back the converter has been changed and the auto has had some precautionary mods done by my auto builder who is an absolute legend its almost bolted up iam just checking clearance's then it will be getting driven straight to a dyno to see the results
What stall converter are you aiming for? Does it have a lock-up clutch in the converter?
I'm wondering what stall I should aim for. I'm thinking one that will flash to about 5K, and then up as it builds boost to around 6K or so.
10-19-2016, 07:55 PM
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