Just like the question says, will a T-5 and a Australian 9-bolt hold up to 500+ horsies? (somehow, i know what you're all gonna say)

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"Ever notice how imports sound like weedwackers"

 

T5, no. 9 bolt, maybe, for a while.

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Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car and knocking on the SuperPro ET class
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block buildup now in progress for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857
Best corrected ET: 11.163
Best MPH on a time slip: 117.87
Best corrected MPH: 126.10
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car
91 454SS daily driver
95 Homebuilt Harley

 

You know there is another thread I think in this section that talks about the T5 and what it can hold. Personallly I would not **** around with the T5 and expecting it to hold 500hp...go with a T56 or some other aftermarket tranny. Even if you plan on driving it as a normal daily driven street car......its not going to happen when you are trying to put 500hp through the T5, syncros (sp?) will be the first thing to go...your rear end will be just find, also considering what type of clutch you put in there.

HTH

 

If you go to the track with the T-5 in there, be sure to have another ride home.

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'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (42psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges...ZZ9 cam (i still have to install it )

 

Surely you're not racing this too seriously or you probably wouldn't be asking this question. That said, sure it will hold up. You just gotta MAKE it work by driving like you don't want to hurt the tranny. You can break it at will (probably can do it with a 305). Since you don't want to break it, don't abuse it.

 

The 9 bolt might last for awhile, but bring your cell phone with.

Miles

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88 427 Camaro
12.18 @ 113mph 1.75 60ft
http://www.geocities.com/mek88427

 

Geez, my bone stock L69 with all of 190hp went through a T-5. Stock tires and no power shifting! Two 10 bolt rears too!

Zee

 

that's pretty impressive. i'm sticking to my guns though, treat it right and it'll last... if you want it too. I built gearboxes for cars making 650+ hp and lord knows how much torque. if the driver screwed up, it would break. (granted i'm not talking about t5's here) when the driver treated it right it would live through a race (100 miles). in any case the gearbox will be your weakest link.

alex m
columbia mo

 

So far so good with my T-5 and 9 bolt, but i'm just using drag radials. A Tremec is on the way.

 

So far so good with my T-5 and 9 bolt, but i'm just using drag radials. A Tremec is on the way.

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'91 Formula
383CI Supercharged
5-speed
3.42
12.34@117.04
on Drag Radials

 

Like the others have said, you would be better off with a T-56, or RICHMOND. If you reduced the car weight 300-400 pounds, your t-5/9-bolt would have a better chance at survival. Weight is key to that relatively weak gearbox working. I have a mustang buddy with a 2950 pound car with a 306/T-5 and he runs 7.80 in the 1/8 mile. He launches that thing at 5000 rpm's on slicks. On the street, he launches at 4000 rpm's on DR's. HTH's

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88 Monte SS 355 TPI/LT-4 HOT CAM/AFR Hydra-rev/ T-56 6-Speed