187 Head Castings
10-01-2000 | 01:25 AM
#1
Thread Starter
Member
Joined: Jul 2000
Posts: 179
Likes: 0
From: Lake Oswego, OR, USA
187 Head Castings
Can somebody tell me the specs on the 187 head castings... I'm having them rebuilt on my 305 z28 and would like to know a little bit about them before I get myself taken at the machine shop.. Thanks alot.
------------------
1991 Z28 305 1LE, TES headers, 3 Chamber flowmaster, Hi-reving cam... the usual street racer
------------------
1991 Z28 305 1LE, TES headers, 3 Chamber flowmaster, Hi-reving cam... the usual street racer
10-04-2000 | 07:31 AM
#3
Member
Joined: Jul 1999
Posts: 105
Likes: 0
From: Duluth, GA USA
The 187 heads were used in 1969 - 70 on 302 and 350 engines. 2.02 & 1.6 valves.... The technology is a little dated but a decent head. I think you might have a problem on a 305 with the valves.
------------------
Hank
87'IROC Z28
Hanks 87 IROC
[This message has been edited by Hank Brote (edited October 04, 2000).]
------------------
Hank
87'IROC Z28
Hanks 87 IROC
[This message has been edited by Hank Brote (edited October 04, 2000).]
10-04-2000 | 09:03 AM
#4
Thread Starter
Member
Joined: Jul 2000
Posts: 179
Likes: 0
From: Lake Oswego, OR, USA
But I just pulled them of my 1991 Z28... They look like there made in this decade, there's even a sensor pluged into one of them.
------------------
1991 Z28 305 1LE, TES headers, 3 Chamber flowmaster, Hi-reving cam... the usual street racer
------------------
1991 Z28 305 1LE, TES headers, 3 Chamber flowmaster, Hi-reving cam... the usual street racer
10-04-2000 | 01:56 PM
#5
Supreme Member
Joined: Jul 1999
Posts: 1,455
Likes: 57
From: Alberta, Canada
Car: 1989 Camaro-1LE
Engine: TPI(s)
Transmission: 5 speed (MM5, MK6)
Axle/Gears: 3.45, 3.73
According to www.mortec.com,
305 heads, 1.84 intake, 1.50 exhaust.
Check down the intake ports and see if it has the swirl vane or if it is open.
If it is open, then there is some performance potential, if there is the swirl, then no.
Any head can be made to perform better, it is a matter of cost.
I don't think the 187's are the best head, but they are probably ok for stock stuff.
Consider the cost of vortec or world products.
Sorry if I got off topic.
Mark.
305 heads, 1.84 intake, 1.50 exhaust.
Check down the intake ports and see if it has the swirl vane or if it is open.
If it is open, then there is some performance potential, if there is the swirl, then no.
Any head can be made to perform better, it is a matter of cost.
I don't think the 187's are the best head, but they are probably ok for stock stuff.
Consider the cost of vortec or world products.
Sorry if I got off topic.
Mark.
Thread
Thread Starter
Forum
Replies
Last Post
92projectcamaro
Engine/Drivetrain/Suspension Parts for Sale
11
01-18-2016 08:00 AM
