What is the largest engine 3rd gens can take?
08-31-2022, 04:59 PM
#2
Supreme Member
Join Date: Jul 2006
Location: 212 is up in this Bit@#
Posts: 2,763
Received 739 Likes
on
565 Posts
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: What is the largest engine 3rd gens can take?
Neither a Short or Tall Deck BBC fit well...
(Headers especially)
But the Tall Deck Engines are definitely worse.
(Headers especially)
But the Tall Deck Engines are definitely worse.
09-01-2022, 06:58 PM
#3
Supreme Member
iTrader: (8)
Join Date: Oct 2001
Location: Il
Posts: 11,723
Received 773 Likes
on
520 Posts
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: What is the largest engine 3rd gens can take?
Nothing like a little 632 bbc
09-02-2022, 05:38 PM
#4
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,117
Received 1,688 Likes
on
1,283 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: What is the largest engine 3rd gens can take?
That thing is NOTHING LIKE "putting an ENGINE into a CAR". It's more like, "wrapping a CAR around an ENGINE". 
The following users liked this post:
T.L. (09-02-2022)
09-02-2022, 10:10 PM
#5
Senior Member
Thread Starter
09-03-2022, 01:26 AM
#6
COTM Editor
iTrader: (22)
Join Date: Mar 2001
Posts: 9,932
Likes: 0
Received 1,860 Likes
on
1,274 Posts
Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: What is the largest engine 3rd gens can take?
I had a standard deck oval port BBC in my car and it fit fine but like said earlier the exhaust options are not great. I had Lemons make me some tri-Y headers that ran down the tunnel like a set of SBC long tubes would. But after all that you'll still have to use a wheezy intake to clear a stock hood. If you don't mind a cowl then you can get a proper intake and let the engine breath more.
Honestly, a BBC is rather silly unless you build a drag car and get happy with using a cowl hood. If you want a fast car that can corner then get a stroker aluminum SBC or LS engine. The LS engine will fit under a stock hood unless you want a single plane intake.
Honestly, a BBC is rather silly unless you build a drag car and get happy with using a cowl hood. If you want a fast car that can corner then get a stroker aluminum SBC or LS engine. The LS engine will fit under a stock hood unless you want a single plane intake.
09-03-2022, 08:40 AM
#7
Supreme Member
iTrader: (8)
Join Date: Oct 2001
Location: Il
Posts: 11,723
Received 773 Likes
on
520 Posts
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: What is the largest engine 3rd gens can take?
Trending Topics
09-03-2022, 03:26 PM
#8
Supreme Member
iTrader: (11)
Join Date: Aug 2013
Location: MICHIGAN
Posts: 4,643
Received 754 Likes
on
580 Posts
Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: What is the largest engine 3rd gens can take?
A lousy picture for trying to see engine install detail, but it shows you a Rat can fit in quite nicely, and look fairly stock doing it.
First photo in this post. https://www.thirdgen.org/forums/memb...ml#post6470695
First photo in this post. https://www.thirdgen.org/forums/memb...ml#post6470695
09-04-2022, 08:42 PM
#9
Senior Member
Thread Starter
Re: What is the largest engine 3rd gens can take?
I had a standard deck oval port BBC in my car and it fit fine but like said earlier the exhaust options are not great. I had Lemons make me some tri-Y headers that ran down the tunnel like a set of SBC long tubes would. But after all that you'll still have to use a wheezy intake to clear a stock hood. If you don't mind a cowl then you can get a proper intake and let the engine breath more.
Honestly, a BBC is rather silly unless you build a drag car and get happy with using a cowl hood. If you want a fast car that can corner then get a stroker aluminum SBC or LS engine. The LS engine will fit under a stock hood unless you want a single plane intake.
Honestly, a BBC is rather silly unless you build a drag car and get happy with using a cowl hood. If you want a fast car that can corner then get a stroker aluminum SBC or LS engine. The LS engine will fit under a stock hood unless you want a single plane intake.
09-04-2022, 09:15 PM
#10
Re: What is the largest engine 3rd gens can take?
My tall deck 555 fits fine with 4” cowl and motor plates and custom fabbed headers.
a tall deck can get you 632” and 900-1000 hp all motor easily for a streetable machine
a custom sheet metal intake would be needed for stock hood clearance and im not sure how much room there is with stock hoods
a tall deck can get you 632” and 900-1000 hp all motor easily for a streetable machine
a custom sheet metal intake would be needed for stock hood clearance and im not sure how much room there is with stock hoods
09-04-2022, 10:18 PM
#11
Supreme Member
Join Date: Jul 2006
Location: 212 is up in this Bit@#
Posts: 2,763
Received 739 Likes
on
565 Posts
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: What is the largest engine 3rd gens can take?
Before having to move the Cylinder-Bore Centers (via an Aftermarket Cylinder Block)...
As Orr89Rocz just said; with the very last 0.025 (Cylinder-Bore diameter) of an Inch, of safety (Cylinder-Wall thickness)...
638 Cubic Inches is as Big as things can get (BBC GM Tall-Deck Cylinder-Block).
Aftermarket BBC Cylinder Blocks are another story...
Depending on the Manufacturer, 900+ to 1,000+ Cubic Inches are on the table!
As Orr89Rocz just said; with the very last 0.025 (Cylinder-Bore diameter) of an Inch, of safety (Cylinder-Wall thickness)...
638 Cubic Inches is as Big as things can get (BBC GM Tall-Deck Cylinder-Block).
Aftermarket BBC Cylinder Blocks are another story...
Depending on the Manufacturer, 900+ to 1,000+ Cubic Inches are on the table!
Thread
Thread Starter
Forum
Replies
Last Post