80mm BBK TB.....yeah or Nay?
Thread Starter
TECH Senior Member
iTrader: (9)
Joined: Dec 2001
Posts: 5,395
Likes: 1
From: Estero, FL
80mm BBK TB.....yeah or Nay? I have my MTI stage 2 LS6 heads and X1 cam coming and I am thinking of upgrading to a larger TB. Anyone have any experiance with this one or is there a different one that you guys would recommend. Any input would be appreciated!
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
TECH Enthusiast
Joined: Nov 2001
Posts: 677
Likes: 0
From: Baton Rouge, La. and sometimes Houston Tx
Re: 80mm BBK TB.....yeah or Nay? Only reason to get one of these is if you can open the throttlebody opening in the intake. This can be done with a Holley or sheetmetal intake either one. If this isn't done you really have no benefit over a ported stock throttlebody. I've seen them both on a flow bench and in most cases through an LS6 intake a good ported one flows as well or better. I do have the BBK thought but my intake has been opened for it. Just depends on what intake you have and your future plans. The BBK has plenty of small problems you'll have to work out but once you get it fixed correctly it should be fine. Its expsensive for what you get to say the least.
Re: 80mm BBK TB.....yeah or Nay? BBK comes with a adaptor plate that necks it down.
With the adaptor plate I think it's worth nothing over a stock ported TB.
Ditto on what Derek said, I would run one if your intake manifold inlet was opened up to 80-85mm. Stock ours are 75mm.
With the adaptor plate I think it's worth nothing over a stock ported TB.
Ditto on what Derek said, I would run one if your intake manifold inlet was opened up to 80-85mm. Stock ours are 75mm.
On The Tree
Joined: May 2002
Posts: 108
Likes: 0
From: Richmond, Virginia
Re: 80mm BBK TB.....yeah or Nay? That is a very good point about the adapter that comes with the BBK. I was wondering what purpose it served.
I am planning to change the LS-1 intake over to the LS-6, and I think I will look and see if I can port it out and eliminate the adapter.
Thanks for the info....
Dave
I am planning to change the LS-1 intake over to the LS-6, and I think I will look and see if I can port it out and eliminate the adapter.
Thanks for the info....
Dave
Re: 80mm BBK TB.....yeah or Nay? I just installed a BBK 80 mm this weekend on my 01 Z28 (came stock with LS6 intake) and I LOVE it. The first time I punched it in 1st, I hit my 6600 RPM rev limiter (was never able to do that before).
I installed the throttle body directly on the intake (no adapter). I did get a strong whistling sound. I then removed the TB, blended the intake face so it was not sharp (made it more like a vintury) and now the sound is almost gone. When I get some time, I will take the intake off the car and do a full polish on that area.
My suggestion, $400 + is a lot (its worth it.... but still a lot). I just put a post up stating that I wanted to buy someone’s BBK on here, LS1.com, Camaroz28.com, and Corvetteforum.com. Within about two weeks I found someone willing to sell for $300.
Chris
I installed the throttle body directly on the intake (no adapter). I did get a strong whistling sound. I then removed the TB, blended the intake face so it was not sharp (made it more like a vintury) and now the sound is almost gone. When I get some time, I will take the intake off the car and do a full polish on that area.
My suggestion, $400 + is a lot (its worth it.... but still a lot). I just put a post up stating that I wanted to buy someone’s BBK on here, LS1.com, Camaroz28.com, and Corvetteforum.com. Within about two weeks I found someone willing to sell for $300.
Chris
Thread Starter
TECH Senior Member
iTrader: (9)
Joined: Dec 2001
Posts: 5,395
Likes: 1
From: Estero, FL
Re: 80mm BBK TB.....yeah or Nay? I was unaware that you could port the stock intake manifold. I have an LS6 intake waiting to go on when the cam and heads get here.
So if I am reading Camaroguys post right, the LS6 intake has a stock 80mm opening?
Can someone set me straight.
So if I am reading Camaroguys post right, the LS6 intake has a stock 80mm opening?
Can someone set me straight.
Trending Topics
Re: 80mm BBK TB.....yeah or Nay? LS1, LS6 intakes are like 75.5mm, so if you do not use the adaptor you will have an edge in there. That probably is the cause of the whistle.
Stock intakes are cannot be ported to 80mm unless you plan to epoxy the lip.
Someone post a close up of an LS6 intake lip?
Stock intakes are cannot be ported to 80mm unless you plan to epoxy the lip.
Someone post a close up of an LS6 intake lip?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Re: 80mm BBK TB.....yeah or Nay? A few years ago I had a stock TB bored out to 80mm.
It's still sitting on a shelf.
I can see the intake inlet gasket all the way around. The lip is very thin. Thinner than (I think) you think it is.
Maybe someone can post a pic of the adaptor plate.
It's still sitting on a shelf.
I can see the intake inlet gasket all the way around. The lip is very thin. Thinner than (I think) you think it is.
Maybe someone can post a pic of the adaptor plate.
Re: 80mm BBK TB.....yeah or Nay? John,
I would like to see a picture of that modified intake. I'll be doing something similar in the near future with my LS6 intake. I'm not afraid of epoxy either. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
I would like to see a picture of that modified intake. I'll be doing something similar in the near future with my LS6 intake. I'm not afraid of epoxy either. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Re: 80mm BBK TB.....yeah or Nay? Not a modified intake, Jantzer, a custom bored OEM TB. I now thinking it's just 79mm. Just the same you will see gasket material all the way around.
I am trying to hook up with my machine guy again to go maybe even more, I'd like to see if the stock TB will go 85mm.
I am trying to hook up with my machine guy again to go maybe even more, I'd like to see if the stock TB will go 85mm.
Re: 80mm BBK TB.....yeah or Nay? Scott keep doing those worthless mods. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
I'm going to go with a sheet metal intake when I find one that has good results.
I'm going to go with a sheet metal intake when I find one that has good results.
On The Tree
Joined: May 2002
Posts: 108
Likes: 0
From: Richmond, Virginia
Re: 80mm BBK TB.....yeah or Nay? I have the BBK 80 mm TB on my car which has a stock cam and heads, but 1.8 rockers, a modified MAF and a MAFT. I have had no problems with the unit. It idles great and pulls right up to the Rev Limit. I have heard other people complain of idle problems, and a whistle at off idle... but I have no experienced these problems. I guess some others may give more insight. It might be a hit or miss thing with the TB... I have heard of people having piston slap noise in brand new LS-1's, but I have not experienced that either... which I have been told GM claims is normal and acceptable.
Good luck with your project.
Good luck with your project.
Re: 80mm BBK TB.....yeah or Nay? WOW!!! S2 LS6 heads and X1 cam <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> You'll be taking no prisoners at PR <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" />
I just hope I can hang somewhat close to you when I'm done with my lowly set-up using S2 MTI LS1 heads & my B1 cam <img border="0" title="" alt="[Embarrassed]" src="gr_emb.gif" />
I just hope I can hang somewhat close to you when I'm done with my lowly set-up using S2 MTI LS1 heads & my B1 cam <img border="0" title="" alt="[Embarrassed]" src="gr_emb.gif" />
Thread Starter
TECH Senior Member
iTrader: (9)
Joined: Dec 2001
Posts: 5,395
Likes: 1
From: Estero, FL
Re: 80mm BBK TB.....yeah or Nay? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by John B:
<strong>WOW!!! S2 LS6 heads and X1 cam <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> You'll be taking no prisoners at PR <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" />
<img border="0" title="" alt="[Embarrassed]" src="gr_emb.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">well we will see what it does. I am hoping for the 435+RWHP. I would really like to see 450. I might bring it out to PR once or twice but its not really being set up for the strip.
<strong>WOW!!! S2 LS6 heads and X1 cam <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> You'll be taking no prisoners at PR <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" />
<img border="0" title="" alt="[Embarrassed]" src="gr_emb.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">well we will see what it does. I am hoping for the 435+RWHP. I would really like to see 450. I might bring it out to PR once or twice but its not really being set up for the strip.
Re: 80mm BBK TB.....yeah or Nay? NataSS, I see you posting about that BBK for sale on LS1.com, WickedOO is someone I know, you could always try it and resell it if you get it cheap.
Upon some additional input, I will take my bored out one and true it to 80mm like a BBK. I can get custom blades made too. I'll show a pic of how much gasket you will see.
Upon some additional input, I will take my bored out one and true it to 80mm like a BBK. I can get custom blades made too. I'll show a pic of how much gasket you will see.
Banned
Joined: Apr 2002
Posts: 1
Likes: 0
From: Los Angeles, CA
Re: 80mm BBK TB.....yeah or Nay? The BBK throttle body DOES work - even though the intake manifold opening only opens to 75mm. Even with the adapter plate!
Reasoning?
The stock throttle body is 75mm, but in terms of effective area, is smaller because of the restriction present with the throttle blade, shaft, and screws. So, with the BBK, you have an 80mm area that is reduced by the blade, shaft, etc - that lets more air get through the BBK.
By the time you get to the intake, there is just 75mm of pure cross sectional area worth of straight unrestricted airflow.
I'm not sure the BBK is worth any power, because I don't know if the engine needs more than a 75mm throttle body. But the BBK 80mm defintely increases flow over a stock body even with the stock intake as a restriction (which, as I explained above, it's really not).
QUICK
Reasoning?
The stock throttle body is 75mm, but in terms of effective area, is smaller because of the restriction present with the throttle blade, shaft, and screws. So, with the BBK, you have an 80mm area that is reduced by the blade, shaft, etc - that lets more air get through the BBK.
By the time you get to the intake, there is just 75mm of pure cross sectional area worth of straight unrestricted airflow.
I'm not sure the BBK is worth any power, because I don't know if the engine needs more than a 75mm throttle body. But the BBK 80mm defintely increases flow over a stock body even with the stock intake as a restriction (which, as I explained above, it's really not).
QUICK