Gains from switching from 78mm tb to 90mm on 408

Reply Subscribe

Thread Tools

Search this Thread

02-14-2011, 08:28 PM

Phantom

11 Second Club

Thread Starter

iTrader: (16)

Join Date: Sep 2006

Location: The 405

Posts: 5,636

Likes: 0

Received 0 Likes on 0 Posts

Gains from switching from 78mm tb to 90mm on 408

What kind of gains would we see on a 408 with a vic jr, elbow, afr225 heads, 240's cam, headers, etc etc...Switching to a 90mm tb vs the 78mm we have now? Just curious. Thanks

Reply Like

02-14-2011, 08:39 PM

ChucksZ06

TECH Resident

iTrader: (9)

Join Date: Feb 2005

Posts: 976

Likes: 2

Received 1 Like on 1 Post

I would guess about 10 hp.

Reply Like

02-14-2011, 08:41 PM

Phantom

11 Second Club

Thread Starter

iTrader: (16)

Join Date: Sep 2006

Location: The 405

Posts: 5,636

Likes: 0

Received 0 Likes on 0 Posts

thats it?

Reply Like

02-14-2011, 09:06 PM

custm2500

Ph.D. in HUBRIS

iTrader: (11)

Join Date: Mar 2009

Posts: 3,964

Likes: 0

Received 0 Likes on 0 Posts

I would think signifigantly more then 10 HP. I could be wrong but I am thinking 20 or more. That TB has got to be holding you back big time.

Reply Like

02-14-2011, 09:21 PM

Phantom

11 Second Club

Thread Starter

iTrader: (16)

Join Date: Sep 2006

Location: The 405

Posts: 5,636

Likes: 0

Received 0 Likes on 0 Posts

if its not more than 20hp than we'll just throw a bigger jet in it lol

Reply Like

02-14-2011, 11:07 PM

hitmanws6

TECH Veteran

iTrader: (20)

Join Date: Dec 2008

Location: Orange, CA

Posts: 4,041

Likes: 0

Received 4 Likes on 4 Posts

It should be more than 20, if i recall the gains on putting a 90 mm TB on an LS6 intake on a H/C 346 was around 17

Reply Like

02-16-2011, 09:01 AM

Ph1berOpt1k

Teching In

iTrader: (1)

Join Date: Sep 2009

Posts: 13

Likes: 0

Received 0 Likes on 0 Posts

how much vacuum is it pulling at WOT?

Reply Like

Gains from switching from 78mm tb to 90mm on 408

Gains from switching from 78mm tb to 90mm on 408

Trending Topics