Can Auto stock trans handle 500whp safely?

nomodsjk · 08-17-2014, 01:35 PM

I have the Stillen supercharger with the 9lb pulley, headers, test pipes and cat back exhaust. With all my mods together I'm pushing 440 whp 327tq. My question is do you guys think it would be SAFE to get the vortech impeller upgrade considering all my internals and trans are OEM? Also I have both oil and trans coolers along with the csf tripple pass radiator and my oil temp never goes above 190. Even during "spirited driving"

JWillis72 · 08-17-2014, 01:55 PM

There is a post here somewhere about the 7AT and the manufacture rates it up to 300tq so I wouldn't think it's a good idea.

EndyKwon · 08-17-2014, 02:17 PM

How long have you had it at 440/327 for?

JWillis72 · 08-17-2014, 02:55 PM

I've been over 400/300 for about a year and track mine. We had it on the dyno yesterday at 418/310 and were getting no tran slipping.

Tadpole · 08-17-2014, 05:10 PM

Put some money in that tranny.

EndyKwon · 08-17-2014, 05:11 PM

If I were to go FI, I'd probably have my numbers around there, 400/300. Sounds like the tranny can definitely work it out. What's your daily driving pattern like? I'm assuming you take it easy on the streets and you launch on on-ramps to freeway every now and then.

I still haven't decided whether I'd go STS turbo or a stillen SC. Personally, I'd like to keep the numbers just slightly high enough that it's still 'faster', yet, not enough to kill me or the motor/7AT.

JWillis72 · 08-17-2014, 05:44 PM

I'm not always hard on it but I wouldn't say I'm nice to it. It has over 12K with the SC on it. I bought a set of BFG G-Force comp2s about the same time and the rears are slicks now. I'm waiting on new wheels so I can get them off the car.

Masterbeatty · 08-17-2014, 06:56 PM

Quote:

Originally Posted by Tadpole

Put some money in that tranny.

This reminds me of hangover 3 on the reason why Bangkok is called Bangkok. Throw too much money into a tranny and....the rest is history.

DOOMMONKEY777 · 08-17-2014, 07:05 PM

Dude brand new tranny(no homo) is like $1800 well manual at least.
And if i remember correctly it can hold up to like 600lb of torque. If it goes its cheaper to buy a new 1 anyways. But for automatics i dont know and its cheaper to buy a manual with "$-mode" and an extra pedal, when auto goes.

nomodsjk · 08-17-2014, 07:06 PM

Quote:

Originally Posted by EndyKwon

If I were to go FI, I'd probably have my numbers around there, 400/300. Sounds like the tranny can definitely work it out. What's your daily driving pattern like? I'm assuming you take it easy on the streets and you launch on on-ramps to freeway every now and then.

I still haven't decided whether I'd go STS turbo or a stillen SC. Personally, I'd like to keep the numbers just slightly high enough that it's still 'faster', yet, not enough to kill me or the motor/7AT.

I drive it every day and honestly I drive it like it's my last day on earth! I didn't buy a race car for the look. I want to be able to drive it like I stole it. I know someone on here will have something to say about it but that's my style

nomodsjk · 08-17-2014, 07:11 PM

Quote:

Originally Posted by DOOMMONKEY777

Dude brand new tranny(no homo) is like $1800 well manual at least.
And if i remember correctly it can hold up to like 600lb of torque. If it goes its cheaper to buy a new 1 anyways. But for automatics i dont know and its cheaper to buy a manual with "$-mode" and an extra pedal, when auto goes.

Our 7at trans is around 8gs bro so there is the hesitation

nomodsjk · 08-17-2014, 07:15 PM

Quote:

Originally Posted by EndyKwon

How long have you had it at 440/327 for?

About 3 months. I bought the car in April and put the Stillen supercharger on a month after that. Along with all other mods. Everything went on all at once. Car was bone stock when I bought it

KaienZ34 · 08-17-2014, 07:24 PM

Forced Induction & 7AT 370z Info

nomodsjk · 08-19-2014, 10:49 AM

Thanks for the link Kai. I've read most of that thread before but didn't really get a difinitive answer. Guess its just at my own risk. I wanted to get impeller upgrade before nationals and get the tranny work done over the winter so I think it will be OK for a couple thousand miles without the extra trans work but we'll see

KaienZ34 · 08-19-2014, 01:11 PM

At the very least get a trans cooler and tune to increase the line pressure, and take it easy in gears 4-7.

08-17-2014, 01:35 PM	#1 (permalink)
nomodsjk Premium Member Join Date: Apr 2014 Location: martinsburg wv Posts: 2,073 Drives: 2011 370z MB/7at Rep Power: 19962	Can Auto stock trans handle 500whp safely? I have the Stillen supercharger with the 9lb pulley, headers, test pipes and cat back exhaust. With all my mods together I'm pushing 440 whp 327tq. My question is do you guys think it would be SAFE to get the vortech impeller upgrade considering all my internals and trans are OEM? Also I have both oil and trans coolers along with the csf tripple pass radiator and my oil temp never goes above 190. Even during "spirited driving" Last edited by nomodsjk; 08-17-2014 at 07:13 PM.

08-17-2014, 01:55 PM	#2 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 45	There is a post here somewhere about the 7AT and the manufacture rates it up to 300tq so I wouldn't think it's a good idea. DEpointfive0 likes this.

08-17-2014, 02:55 PM	#4 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 45	I've been over 400/300 for about a year and track mine. We had it on the dyno yesterday at 418/310 and were getting no tran slipping. watson853 likes this.

08-17-2014, 05:10 PM	#5 (permalink)
Tadpole A True Z Fanatic Join Date: Sep 2013 Location: Lockhart, TX Posts: 1,082 Drives: 13 Nissan 370Z A7 Rep Power: 18	Put some money in that tranny. __________________ Takeda TR3009P Short Ram Intakes, Custom Dual Exhaust, X-Piped with 18" Resonators & TopSpeed Axle Backs. EVO-R Led Third Foglight,

08-17-2014, 07:05 PM	#9 (permalink)
DOOMMONKEY777 A True Z Fanatic Join Date: Oct 2010 Location: Crooklyn Posts: 1,008 Drives: 370Z 6psd-sport-pkg Rep Power: 21	Dude brand new tranny(no homo) is like $1800 well manual at least. And if i remember correctly it can hold up to like 600lb of torque. If it goes its cheaper to buy a new 1 anyways. But for automatics i dont know and its cheaper to buy a manual with "$-mode" and an extra pedal, when auto goes. __________________ Kids don't do Drugs, Drugs are bad, so let the professional druggies do Drugs for you. 537whp/496lb/tq@8-9PSI 93 octane

08-17-2014, 02:17 PM	#3 (permalink)
EndyKwon Enthusiast Member Join Date: Jan 2012 Location: Los Angeles Posts: 427 Drives: '11 BSilver Base 7AT Rep Power: 13	How long have you had it at 440/327 for?

08-17-2014, 05:11 PM	#6 (permalink)
EndyKwon Enthusiast Member Join Date: Jan 2012 Location: Los Angeles Posts: 427 Drives: '11 BSilver Base 7AT Rep Power: 13	If I were to go FI, I'd probably have my numbers around there, 400/300. Sounds like the tranny can definitely work it out. What's your daily driving pattern like? I'm assuming you take it easy on the streets and you launch on on-ramps to freeway every now and then. I still haven't decided whether I'd go STS turbo or a stillen SC. Personally, I'd like to keep the numbers just slightly high enough that it's still 'faster', yet, not enough to kill me or the motor/7AT.

08-17-2014, 05:44 PM	#7 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 45	I'm not always hard on it but I wouldn't say I'm nice to it. It has over 12K with the SC on it. I bought a set of BFG G-Force comp2s about the same time and the rears are slicks now. I'm waiting on new wheels so I can get them off the car.

08-17-2014, 07:24 PM	#13 (permalink)
KaienZ34 A True Z Fanatic Join Date: Oct 2009 Location: LA. not L.a. Posts: 21,652 Drives: Z34 Tour/Sport Rep Power: 178	Forced Induction & 7AT 370z Info gbrettin likes this. __________________ *"These Violent Delights Have Violent Ends"* http://www.the370z.com/members/kaienz34-albums-z34.html

08-19-2014, 10:49 AM	#14 (permalink)
nomodsjk Premium Member Join Date: Apr 2014 Location: martinsburg wv Posts: 2,073 Drives: 2011 370z MB/7at Rep Power: 19962	Thanks for the link Kai. I've read most of that thread before but didn't really get a difinitive answer. Guess its just at my own risk. I wanted to get impeller upgrade before nationals and get the tranny work done over the winter so I think it will be OK for a couple thousand miles without the extra trans work but we'll see Last edited by nomodsjk; 08-19-2014 at 01:16 PM.

08-19-2014, 01:11 PM	#15 (permalink)
KaienZ34 A True Z Fanatic Join Date: Oct 2009 Location: LA. not L.a. Posts: 21,652 Drives: Z34 Tour/Sport Rep Power: 178	At the very least get a trans cooler and tune to increase the line pressure, and take it easy in gears 4-7. "Z"en likes this. __________________ *"These Violent Delights Have Violent Ends"* http://www.the370z.com/members/kaienz34-albums-z34.html

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