Boost and a L27?
03-01-2005, 09:44 AM
#1
Senior Member
Certified GM nut
Thread Starter
Join Date: Jul 2004
Location: New York City
Posts: 1,912
Likes: 0
Received 0 Likes
on
0 Posts
Boost and a L27?
How much boost can L27 handle? Has anyone tried to boost a L27 with either a supercharger or turbo before? I'm thinking about making a turbo for a L27 bonneville. And yes I know about a L67 swap but I like the L27 power band and would love to see how it reacts to a turbo.
Thanks in advance
Thanks in advance
03-01-2005, 10:13 AM
#3
Senior Member
Certified GM nut
Thread Starter
Join Date: Jul 2004
Location: New York City
Posts: 1,912
Likes: 0
Received 0 Likes
on
0 Posts
, but I don't know how strong the internals are to handle an excessive amount.
Believe me the last thing I want to do is blow up the motor . My father would never forgive me
. How much compression does a L27 have? I tried to goole it but didn't find the numbers. I know that the L27 went up in compression in 1993 but how much I haven't found out yet.
03-01-2005, 10:24 AM
#4
Senior Member
Certified GM nut
Join Date: Feb 2003
Location: Georgia
Posts: 2,095
Likes: 0
Received 0 Likes
on
0 Posts
http://bonnevilleclub.com/forum/viewtopic.php?t=24923
This might answer some of your questions...or leave you with more.
This might answer some of your questions...or leave you with more.
03-01-2005, 10:40 AM
#5
Senior Member
Certified Car Nut
It'* been 8.5:1 the whole run. No change in compression.
8.5:1 compression ratio
dished pistons
forged crank
shot peened rods. (l67 has forged rods & pistons afawk)
Nearly all engines in good shape can take 5/6 or so PSI with very little tuning.
8.5:1 compression ratio
dished pistons
forged crank
shot peened rods. (l67 has forged rods & pistons afawk)
Nearly all engines in good shape can take 5/6 or so PSI with very little tuning.
03-01-2005, 11:10 AM
#6
Senior Member
Certified GM nut
Join Date: Feb 2003
Location: Georgia
Posts: 2,095
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by BonneMeMN
It'* been 8.5:1 the whole run. No change in compression.
8.5:1 compression ratio
dished pistons
forged crank
shot peened rods. (l67 has forged rods & pistons afawk)
Nearly all engines in good shape can take 5/6 or so PSI with very little tuning.
8.5:1 compression ratio
dished pistons
forged crank
shot peened rods. (l67 has forged rods & pistons afawk)
Nearly all engines in good shape can take 5/6 or so PSI with very little tuning.
When did the forged crank come about? Do we know the rods are shot-peened? Have we gotten any new news on the pistons that says they're forged?
You need to start inviting me to these BonneMeMN meetings :P
03-01-2005, 11:52 AM
#8
Senior Member
Certified GM nut
Thread Starter
Join Date: Jul 2004
Location: New York City
Posts: 1,912
Likes: 0
Received 0 Likes
on
0 Posts
It'* been 8.5:1 the whole run. No change in compression.
In the middle of the histoy it says
Roller rocker arms, a higher compression ratio, and reduced piston ring tension improved efficiency in 1993.
03-01-2005, 12:03 PM
#9
Guest
Posts: n/a
Originally Posted by OLDsman105
It'* been 8.5:1 the whole run. No change in compression.
In the middle of the histoy it says
Roller rocker arms, a higher compression ratio, and reduced piston ring tension improved efficiency in 1993.
Now the 3.0 and later 3300 Buick V6'* did use 9.0 to 1 compression... The only change in compression for the 3800 was with the Vin K engine to 9.4 to 1...<---- That they got correct...
I have seen a few sites that have flawed info...
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
03-01-2005, 12:50 PM
#10
Senior Member
True Car Nut
Originally Posted by BonneMeMN
8.5:1 compression ratio
dished pistons
forged crank
shot peened rods. (l67 has forged rods & pistons afawk)
dished pistons
forged crank
shot peened rods. (l67 has forged rods & pistons afawk)