| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
|
|
#1
11-12-2004, 11:17 AM
|
||||
|
||||
how do you guys chain, restrain, tie down your motors.
70 lemans, hoping for the 12's. and i don't want to break a motor mount. any pics? thanks, david |
|
#2
11-16-2004, 06:57 PM
|
||||
|
||||
|
I have never seen the urathane mounts, can you post a pic? I ran a 455 and a muncie w/410 gears for years. I went through lots of motor mounts and trans mounts over the years. I made a strap that helped, if you design it right it will do the job and make your mounts last longer. I guess the way you drive it makes a difference as well...
Thats why I went through many...
__________________
1969 Firebird, Tx3-455/468 machined by CVMS E-heads by Dave Wilcox/Comp Cams 300B-6 flat solid 850DP on E-85 by Eric Niefert/T2 1" plastic spacer T-400/PTC 4000/390's/30x9 Hoosier radial slicks,#3400 1.38 60' 6.32 @ 108 MPH at Northeast Dragway NC 5/23/15 (9th pass on new engine) https://m.youtube.com/watch?v=ePCu2v...ature=youtu.be 1.37 60' 6.26 @ 109 half track, 9.86 @ 136 1/4 mile, #3350 11/26/16 at Richmond Dragway (125th pass on new engine) |
|
#3
11-14-2004, 07:53 PM
|
||||
|
||||
|
thanks for posting this modification, I drive my car on the street alot and couldnt bring myself to puting solid mounts on it. Thanks again Jim
__________________
72firebird 3800# 496 316cfm eheads, 11.1:1 compression, custom solid roller, victor 4500 intake port matched, 1050 dominator, continental converter flash 4400 stall. 3.73. 2 inch headers with 3.5 with x to mufflers reduced to 3 inch full exhaust. mallory 250 fuel pump, cal tracs with split monos ..Pump gas 91 octane. |
|
#4
11-16-2004, 07:37 PM
|
||||
|
||||
|
I just switched from stock mounts to solid on my 72 firebird. It is a street/strip 474, e-heads with a 4-speed. I was afraid of breaking an engine mount. I have to say that the added vibration is very noticable while crusing and also very irritating. I have seen urathane mounts for Chevy's that have a safety feature built in as shown in the earlier post. Do they make one for Pontiac? If not, I will buy new rubber mounts and modify them the way Jim Hand described. Thanks for the tip
|
|
#5
11-13-2004, 11:40 AM
|
||||
|
||||
|
Here is Jim's pic that I lightened up to show more detail:
|
|
#6
11-12-2004, 12:29 PM
|
|||
|
|||
|
My Vega and 69 Firebird are front and mid plate cars now. I got tired of halfway done jobs.
__________________
Have A Great Day |
|
#7
11-12-2004, 11:49 AM
|
|||
|
|||
|
Indian Adventures sells a nice set of solid mounts for the A-body. A pair of "plates" that tie the frame to the front of the heads is also a very popular method. Chains and cables are from the '60s...
|
|
#8
11-12-2004, 09:03 PM
|
|||
|
|||
|
67GTO,
We modified a stock mount to provide a positive stop while retaining rubber cushioning for normal driving. It has worked perfectly for over 10 years on my wagon. It takes a bit of work and welding but that is what hot rodding is about. This information is courtesy High Performance Pontiac, August, 1993, and my son Joe Hand. The hardened rod (referenced in the article) we used was a section of an engine mounting bolt. Jim Hand |
|
#9
11-13-2004, 07:41 AM
|
||||
|
||||
|
Does anyone make a solid mount for the first generation firebirds?
__________________
If its one thing I know, its..... Uhhh I forgot  .What do you mean I couldnt be the president of the United States of America, Its still WE THE PEOPLE, RIGHT!!  
|
|
#10
11-16-2004, 10:05 AM
|
||||
|
||||
|
69 455,I have already purchased a set of urathane engine mounts from energy suspention,will these mounts do the job?I still have the originals and they look Ok but I was figuring the urathane was the way to go?? The car is a stick and I am worried about a lot of engine rocking and thats why I was woundering about a strap
|
|
#11
11-13-2004, 05:31 AM
|
||||
|
||||
|
Who sells a torque strap for a first gen Firebird??
|
|
#12
11-13-2004, 05:05 AM
|
|||
|
|||
|
Jim's "limiter" is nice and (as with all his stuff) very methodical.
I use a threaded tensioner assembly. Turnbuckle and two hiem ends that have a bracket welded to the passengers side subframe. Use a mount plate that bolts to the three holes in the end of my E-heads. Allows me to preload the engine to a degree. I would take some pics but the cars all taped/masked up for painting.
__________________
 SECOND AMENDMENT: AMERICA'S ORIGINAL HOMELAND SECURITY! |
|
#13
11-12-2004, 02:50 PM
|
||||
|
||||
|
thanks for the replies.
i think i'll go with the plates and be sure. david |
|
#14
11-13-2004, 08:54 AM
|
|||
|
|||
|
Here is a photo of the modified mount in place. The location and black paint makes it a bit difficult to get an ideal photo. But notice the shiny spot where the added rod has contacted the solid part of the mount (under full acceleration).
|
|
#15
11-12-2004, 11:17 AM
|
||||
|
||||
|
how do you guys chain, restrain, tie down your motors.
70 lemans, hoping for the 12's. and i don't want to break a motor mount. any pics? thanks, david |
|
#16
11-12-2004, 12:47 PM
|
||||
|
||||
|
i looked into the front and mid plates.
don't you get a lot of vibration from this kind of setup? |
|
#17
11-13-2004, 08:02 AM
|
||||
|
||||
|
Great idea Jim. Thanks for posting the article.
__________________
_________________________ _________________________________ http://www.youtube.com/watch?v=_qZgOpn-w-o <<< Burnout Video  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Treat Me Good, I'll Treat You Better; Treat Me Bad, I'll Treat You Worse" Sonny Barger ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
|
#18
11-12-2004, 12:09 PM
|
||||
|
||||
|
All pontiac.com front plate, TCI midplate is what I'm goin with.
|
|
#19
11-13-2004, 08:24 AM
|
|||
|
|||
|
Although the article does not mention it, it will be necessary to heat and bend the tab on the motor mount to allow space for the hardened rod. And the .030" clearance figure is very nominal.
The real advantage of this setup is that we have the positive retaining of the engine under full load, but it does not transfer the roughness and noise into the cabin as does any kind of solid mount. That is not a problem with a race car, but is quite important with a quiet muffled car that will be driven on the street. I tried solid straps, chains, and cables before Joe came up with this idea. And the original mount has now been in service for about 13 years and thousands of dragstrip runs. Jim Hand |
|
#20
11-13-2004, 11:28 AM
|
||||
|
||||
|
Also, if you go with a mid plate you may have to modify some header tubes to clear the plate. I would go with Hand's mod if you are driving on the street.
Erik
__________________
1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 6.0L LS single turbo, 8.85 @155 mph 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.03@171 mph 2009 G8 GT |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Hybrid Mode
