Southern California Area Southern California Members.

telling the difference of 305 and 350

Thread Tools
 
Search this Thread
 
Old 10-20-2004, 06:13 PM
  #1  
Member
Thread Starter
 
PsychoGTA's Avatar
 
Join Date: Mar 2003
Location: Anaheim,Ca
Posts: 236
Likes: 0
Received 0 Likes on 0 Posts
telling the difference of 305 and 350

Well one of my friends bought a GTA. And he was told it was a 350 tpi. The other day he went to buy a water pump and the guy at pepboys told him it was a 305. Can you tell what size it is by the water pump. And is there another way to tell what size it is?
Peace Out,
PsychoGTA
_______________________________________________
American Beef better than Imported Rlce Anyday.
Old 10-20-2004, 06:42 PM
  #2  
Moderator

iTrader: (6)
 
Agent13's Avatar
 
Join Date: May 2002
Location: Chicagoland
Posts: 2,301
Received 13 Likes on 7 Posts
Car: 1983 Daytona Trans Am
Engine: LG4
Transmission: T5
Axle/Gears: 3.73
8th digit of the VIN should be 8 for it to be a 350...
Old 10-20-2004, 10:03 PM
  #3  
Supreme Member

 
Russ-So Cal's Avatar
 
Join Date: Dec 1999
Location: Lakewood, ca. USA
Posts: 2,430
Likes: 0
Received 0 Likes on 0 Posts
I think the water pumps are identical. I sure wouldn't go by what a counterman at Pep Boys says. The vin will tell you what engine came in the car, but that doesn't mean it still has the original engine installed. The surest wat to tell is to use a mirror to look at the back of the left bank of the block ( I think it's the left, but it could be right). A 305 will have 5.0 liter stamped into the back of the block. A 350 will have 5.7 liter stamped in the same place.
Old 10-20-2004, 10:11 PM
  #4  
Moderator

iTrader: (6)
 
Agent13's Avatar
 
Join Date: May 2002
Location: Chicagoland
Posts: 2,301
Received 13 Likes on 7 Posts
Car: 1983 Daytona Trans Am
Engine: LG4
Transmission: T5
Axle/Gears: 3.73
Originally posted by Russ-So Cal
I think the water pumps are identical. I sure wouldn't go by what a counterman at Pep Boys says. The vin will tell you what engine came in the car, but that doesn't mean it still has the original engine installed. The surest wat to tell is to use a mirror to look at the back of the left bank of the block ( I think it's the left, but it could be right). A 305 will have 5.0 liter stamped into the back of the block. A 350 will have 5.7 liter stamped in the same place.
Thats a good way too, but doesn't it only work for the later blocks?
Old 10-20-2004, 11:54 PM
  #5  
Supreme Member

iTrader: (7)
 
Dyno Don's Avatar
 
Join Date: Mar 2000
Location: Orange, CA
Posts: 5,674
Likes: 0
Received 106 Likes on 65 Posts
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: telling the difference of 305 and 350

Originally posted by PsychoGTA
Well one of my friends bought a GTA. And he was told it was a 350 tpi. The other day he went to buy a water pump and the guy at pepboys told him it was a 305. Can you tell what size it is by the water pump. And is there another way to tell what size it is?
Peace Out,
PsychoGTA
_______________________________________________
American Beef better than Imported Rlce Anyday.
Look on the right side of the block above the starter a 305 will have a # in the casting 627 a 350 will have the # 638 (the number is upside down). The # are about 1/2" tall.
Old 10-21-2004, 12:14 AM
  #6  
Supreme Member

 
Russ-So Cal's Avatar
 
Join Date: Dec 1999
Location: Lakewood, ca. USA
Posts: 2,430
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by 82FirebirdTA
Thats a good way too, but doesn't it only work for the later blocks?
I may be wrong, but I think that works for any sbc that has dicsplacement measured in liters instead of cubic inches.
Old 10-21-2004, 04:46 AM
  #7  
Member
 
custom88camaro's Avatar
 
Join Date: Oct 2004
Location: Oregon, Roseburg area
Posts: 197
Likes: 0
Received 0 Likes on 0 Posts
Car: 88 camaro
Engine: carby 350
Transmission: t-5 from v6 car
I work at a NAPA. If somebody came to me and said they had a 86 camaro, (for instance), and said it had a 350, I may be inclined to tell them it was a 305 b/c 350 wasn't offered in that year. The computer gives me different engine options for each car, the only option for v8 in that car would be 305. I wouldn't assume though b/c the engine could be swapped out, and besides, it wouldn't matter b/c it is the same pump!
Old 10-21-2004, 11:45 AM
  #8  
TA
Supreme Member

iTrader: (1)
 
TA's Avatar
 
Join Date: Jul 2000
Location: Carson, CA
Posts: 1,290
Likes: 0
Received 0 Likes on 0 Posts
Car: '88 GTA, 90 Formula
Engine: 5.7 TPI, fed growth hormones
Transmission: 700r4 4u2?
Axle/Gears: 9bolt
First year of GTA was '87, and they were standard with Auto & 350's. If you can see on the block behind the distributor, like the guys say, it will be 5.0 or 5.7. Also, if it has the heat exchanger under the oil filter, which runs coolant to and from the heater hoses, it is a 350. If it is a manual trans, it is a 305.

...unless someone has swapped things out.

Good luck
Troy
Old 10-21-2004, 07:48 PM
  #9  
Member
Thread Starter
 
PsychoGTA's Avatar
 
Join Date: Mar 2003
Location: Anaheim,Ca
Posts: 236
Likes: 0
Received 0 Likes on 0 Posts
Thanx for the replys. It is not the original engine. I will take a look at the engine see if i can find out what it is. Thanx
Peace Out,
PsychoGTA
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
xkingcodex
Engine Swap
14
02-12-2020 07:43 PM
Jake_92RS
Tech / General Engine
8
01-28-2020 10:37 PM
theshackle
Tech / General Engine
4
03-05-2017 06:37 PM
st.evel07
Engine Swap
5
08-13-2015 06:15 PM



Quick Reply: telling the difference of 305 and 350



All times are GMT -5. The time now is 03:27 AM.