v6 Bore
09-25-2005, 12:47 PM
#2
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Car: 91 Firebird
Engine: 3.1 v6
Transmission: Automatic
Anybody know? I'd like to find out BEFORE I buy the pistons.. don't wanna find out that I got pistons that are too big.
09-29-2005, 12:39 AM
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Car: only GM,88 camaro, 91r/s camaro, 91
Engine: Clean oil, looks fresh, no leaks
Transmission: Bright Red, never burnt, no leaks
Axle/Gears: currently whining
bump this
Ide also like to know !! can any one out there tell us?
OH and also i was wondering .,If once bored out,. will it make it run hotter??thus needing upgraded coolin system??
OH and also i was wondering .,If once bored out,. will it make it run hotter??thus needing upgraded coolin system??
09-29-2005, 11:19 AM
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Car: 2005 Lincoln LS, 83' Z28
Engine: 242 DOHC and an empty engine bay.
Transmission: 5R55S, T5 soon to be auto
Axle/Gears: 3.58s and soon to be 4.10s
Your engine will run hotter due to the fact that the piston walls are gonna be skinnier. Dont kno how much hotter but I know it will run hotter.
09-29-2005, 12:07 PM
#5
09-29-2005, 08:07 PM
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Max you can go on a 2.8 block is 3.56" bore. Standard bore is 3.50 so its safe to .060" over. 3.57" is getting very questionable.
The 2.8 and the 3.1 are "both" considered 2.8 blocks
The larger and stronger webbed 3.4 blocks can safely go to also is .060" over bore. The 3.4L blocks have a factory bore of 3.62" so you can go safely up to 3.68"
The 2.8 and the 3.1 are "both" considered 2.8 blocks
The larger and stronger webbed 3.4 blocks can safely go to also is .060" over bore. The 3.4L blocks have a factory bore of 3.62" so you can go safely up to 3.68"
09-29-2005, 08:17 PM
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And in cause anyone is wondering what the displacement is?
2.8L stroke/motor bored out to 3.56" = 2.97L
3.1L stroke/motor bored out to 3.56" = 3.3L
A 3.4 taken out max bore to 3.68" = 3.52L
A stock 3.4 is actually only 3.39L from the factory at 3.62" bore
2.8L stroke/motor bored out to 3.56" = 2.97L
3.1L stroke/motor bored out to 3.56" = 3.3L
A 3.4 taken out max bore to 3.68" = 3.52L
A stock 3.4 is actually only 3.39L from the factory at 3.62" bore
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09-29-2005, 08:23 PM
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Car: a car being parted out
Engine: blown up
Transmission: in peices
so how long before you get this one banned?...
and tech...
.060 over is about it on all engines...
most do .020 incriments.
and tech...
.060 over is about it on all engines...
most do .020 incriments.
09-29-2005, 08:30 PM
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Car: 1985 GMC Jimmy/1998 Chevy Malibu
Engine: 3.2L turbo Hybrid/bone stock 3100
Transmission: T-5 soon to be 700R4/4T40E
Originally posted by V6sucker
so how long before you get this one banned?...
and tech...
.060 over is about it on all engines...
most do .020 incriments.
so how long before you get this one banned?...
and tech...
.060 over is about it on all engines...
most do .020 incriments.
09-30-2005, 10:04 AM
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Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
There's no need to take your block that big. I mean, for a few ci, I'll trade that for reliability, and the ability to rebuild AGAIN down the road if need be.
I'm going .50mm on my block (minimum to clean it all up again) which is around .020"
I'm going .50mm on my block (minimum to clean it all up again) which is around .020"
10-01-2005, 10:10 AM
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Car: 1985 GMC Jimmy/1998 Chevy Malibu
Engine: 3.2L turbo Hybrid/bone stock 3100
Transmission: T-5 soon to be 700R4/4T40E
Originally posted by Doward
There's no need to take your block that big. I mean, for a few ci, I'll trade that for reliability, and the ability to rebuild AGAIN down the road if need be.
I'm going .50mm on my block (minimum to clean it all up again) which is around .020"
There's no need to take your block that big. I mean, for a few ci, I'll trade that for reliability, and the ability to rebuild AGAIN down the road if need be.
I'm going .50mm on my block (minimum to clean it all up again) which is around .020"
(Quoted For Truth)
10-03-2005, 03:32 PM
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Car: 91 Firebird
Engine: 3.1 v6
Transmission: Automatic
Sweet thanks. And what all needs to be replaced once the engine is bored? Just the pistons or would i need like rocker arms and what not?
10-03-2005, 06:25 PM
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Car: a car being parted out
Engine: blown up
Transmission: in peices
Originally posted by TransAmMike
Sweet thanks. And what all needs to be replaced once the engine is bored? Just the pistons or would i need like rocker arms and what not?
Sweet thanks. And what all needs to be replaced once the engine is bored? Just the pistons or would i need like rocker arms and what not?
Other than that, you will need to inspect everything else.
I will not say that everything needs replaced, but a few things, sure.
10-06-2005, 08:16 PM
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Car: 1989 RS
Engine: 3.1L + .060" overbore
Transmission: 700R4
Axle/Gears: 4.11, Auburn LSD
Just my two bits, but I bored my 2.8 out .060 and put a 3.1 crank in it. The machinist had no problems finding the overbore pistons.
If you are going through all the hassles of rebuilding a 2.8, make sure you put the high flow oil pump in. It will give you lots more oil pressure at idle. So far I have 5000 miles on my new motor, woot woot! I got my complete kit for under $400 bucks with a bigger cam through delta cams here in Spokane Washington.
If you are going through all the hassles of rebuilding a 2.8, make sure you put the high flow oil pump in. It will give you lots more oil pressure at idle. So far I have 5000 miles on my new motor, woot woot! I got my complete kit for under $400 bucks with a bigger cam through delta cams here in Spokane Washington.
10-06-2005, 10:20 PM
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Car: 1985 GMC Jimmy/1998 Chevy Malibu
Engine: 3.2L turbo Hybrid/bone stock 3100
Transmission: T-5 soon to be 700R4/4T40E
Only use a high pressure oil pump if you are also running something that needs an oil feed, such as a turbo.
I have known a few cam bearings to get damaged in these engine when using a high pressure pump.
I have known a few cam bearings to get damaged in these engine when using a high pressure pump.
10-06-2005, 10:25 PM
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Car: a car being parted out
Engine: blown up
Transmission: in peices
yeah, high VOLUME is one thing that just about every motor could use, high PRESSURE is a No No unless the motor was BUILT for high pressure.
10-07-2005, 11:50 AM
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Car: 1989 RS
Engine: 3.1L + .060" overbore
Transmission: 700R4
Axle/Gears: 4.11, Auburn LSD
Exactly. In 1990 chevy put a new, higher volume oil pump in the 60*V6, GM part number 10051104. It got me about 10-15 more lbs of pressure at idle, according to the stock oil gage. Make sure you get that when you rebuild the motor. Other than than, balance the rotating assembly since you have it all apart and enjoy!
10-07-2005, 12:03 PM
#19
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