Qustions for stroker folks
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Member
Joined: Apr 2004
Posts: 262
Likes: 2
From: Abilene, TX
Car: 1989 GTA
Engine: 5.7 TPI
Transmission: A4
Axle/Gears: 3.23
Qustions for stroker folks
I'm planning on buying an assembled 383 from Speed-o-motive, whom I believe to be reputable. I'd like to keep the stock L98 heads and have them ported and valves replaced with larger. This will give me approx 10.7:1 CR. This sounds too high for me, am I wrong? What head gaskets would you recommend?? Also what's a good example of a small diameter cam that people talk about? I plan to use TPIS upper and lower intakes... shooting for the neighborhood of 375hp/tq. Thanks.
Supreme Member
Joined: Apr 2002
Posts: 1,148
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From: Faribault, Minnesota
Car: 1989 IROC-Z
Engine: LS1
Transmission: T56
if u run 10.7 u'r 383 will deffinatly be on a healthy diet of 93 octane. Also I havent heard very good things about speed-o-motive engines...But make sure u do ur reasearch and make sure its what u want. 383 will be fun!!!
Jason
Jason
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Joined: Apr 2002
Posts: 1,119
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From: Armpit state
Car: 71 Nova
Engine: Superramed 383, Topline heads
Transmission: 700r4
Axle/Gears: 8.2 posi 3.08
Also I havent heard very good things about speed-o-motive engines
They have been included in an article for Super Chevy magazine.
http://www.superchevy-web.com/tech/0403sc_fairground/
Supreme Member
Joined: May 2002
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Originally posted by shaggy56
What have you heard?
They have been included in an article for Super Chevy magazine.
http://www.superchevy-web.com/tech/0403sc_fairground/
What have you heard?
They have been included in an article for Super Chevy magazine.
http://www.superchevy-web.com/tech/0403sc_fairground/
Supreme Member
Joined: Apr 2002
Posts: 1,148
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From: Faribault, Minnesota
Car: 1989 IROC-Z
Engine: LS1
Transmission: T56
I have just heard that their strokers dont hold up...it may not be the builder but that is just what I have heard...I think it may mostly be on the customer swappin in the motor and not allowing for proper break in time...And thus the motor grenading...
Jason
Jason
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Supreme Member
Joined: Apr 2002
Posts: 1,119
Likes: 1
From: Armpit state
Car: 71 Nova
Engine: Superramed 383, Topline heads
Transmission: 700r4
Axle/Gears: 8.2 posi 3.08
Do you know where the failure was at on these engines? Just being curious since a friend was considering one of their kits. I had a local machine shop do mine. I was just wondering what exactly happened with speed-o-motive.
Last edited by shaggy56; Apr 24, 2004 at 10:47 PM.
Senior Member
Joined: Apr 2002
Posts: 672
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From: Houston, Texas
Car: 1989 GTA Nighthawk
Engine: 389 CID TPI
Transmission: TCI 700R4
Axle/Gears: 9 bolt 3.23
I think 10.7:1 will be a little to high for the stock heads. If you are going to pay to have them ported and new valves why not just get a better set of heads?
My motor was done locally, Eagle crank and rods (6 inch) and K-B Hyper pistons. I used a thinner TPIS head gasket to get the 10.3:1 CR using a dished piston for better power.
My motor was done locally, Eagle crank and rods (6 inch) and K-B Hyper pistons. I used a thinner TPIS head gasket to get the 10.3:1 CR using a dished piston for better power.
Joined: Feb 2000
Posts: 1,855
Likes: 13
From: St. Augustine, FL
Car: 89 GTA
Engine: 383
Transmission: 4L80E
Axle/Gears: 12 bolt-3.73
If you get one of their motors, pull it apart and check the clearances. Do a search for camarojoe. He bought a car with a speedomotive 383 in it, and it gave up the ghost. They also took 2 months too long to deliver it and put the wrong parts in it. Since you are in TX, look at www.strokermotor.com and http://www.arlingtonmotorsports.com/index.htm
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