350 deck height?
05-28-2001, 11:35 PM
#2
Supreme Member
Join Date: Apr 2001
Location: USA
Posts: 4,969
Likes: 0
Received 0 Likes
on
0 Posts
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
I think it's the measurement from the center of the crank journals/main caps to the deck. You know, where the heads sit. That is the deck. I dunno specs on what it is supposed to be though. I'm sure I could find it in one of the 1K books I got though. I let the machine shop check mine and they said it was .015" over. I think GM makes it higher for rebuilding. That way it can be milled. I do know it's important in figuring compression ratios and for checking warpage in the block. I ain't ever done it though.
Anybody know? Well I'm sure you do, but will you tell us?
Anybody know? Well I'm sure you do, but will you tell us?
05-29-2001, 06:48 AM
#3
Supreme Member
Join Date: Aug 1999
Location: College Station, Tex USA
Posts: 1,443
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89rs
Engine: 400Sb
Transmission: Tremec 3550
the "nominal" height is 9.015. But, you can't go by that. You can check it on an assembled motor by using a height mic. One thing that will cause it to be different on an assembled motor is the variation in piston heights and deck warping. Best thing to do is check it a couple of places on each piston and at each end of the block.
If your rebuilding a motor, have your machine shop mock up the motor and parts and cut it for zero deck. Done deal. Zero decking runs about 50 bucks more than a standard deck and well worth it.
If your rebuilding a motor, have your machine shop mock up the motor and parts and cut it for zero deck. Done deal. Zero decking runs about 50 bucks more than a standard deck and well worth it.
05-29-2001, 11:06 AM
#4
Senior Member
Join Date: Jul 1999
Location: Haslett, MI
Posts: 900
Likes: 0
Received 1 Like
on
1 Post
Car: 1984 Trans Am WS6
Engine: Minirammed 385, 396 RWHP
Transmission: T56
Axle/Gears: 3.73 Moser 12-bolt
You'll find that most stock motors are 9.025" instead of 9.015" on the deck height. Most stock motors have the piston .025 to .035" "in the hole". Zero deck means that you cut the deck such that the tallest piston is right at the top of the bore at TDC. You then rely on the head gasket to give you the room necessary for accomodating for rod stretch and piston rock. Typically you want about .040" between the piston top and the cylinder head.
------------------
Daniel Burk
View my third-gen hobbyist performance page!
View my reader's ride!
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff., Spohn Adj. torque arm,
Ported 305 heads w/1.94"intake valves, Comp Cams XE262H, Griffen alum. radiator,
Turbine Technologies 2500 stall converter, underdrive pulleys, Crane Hi-6 & more.
1.05g skidpad verified.
Best of 14.039 at 100.82 MPH in Stanton, MI
New! 275-40-ZR17 tires on ROH ZS 17 x 9.5's
------------------
Daniel Burk
View my third-gen hobbyist performance page!
View my reader's ride!
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff., Spohn Adj. torque arm,
Ported 305 heads w/1.94"intake valves, Comp Cams XE262H, Griffen alum. radiator,
Turbine Technologies 2500 stall converter, underdrive pulleys, Crane Hi-6 & more.
1.05g skidpad verified.
Best of 14.039 at 100.82 MPH in Stanton, MI
New! 275-40-ZR17 tires on ROH ZS 17 x 9.5's
Thread
Thread Starter
Forum
Replies
Last Post
Billy Decker
Engine/Drivetrain/Suspension Wanted
0
09-04-2015 03:46 PM
