Stoopid mount question
Thread Starter
On The Tree
Joined: Dec 2005
Posts: 159
Likes: 0
From: Pacifica, CA
Stoopid mount question Hey, I know this is pretty remedial, but here goes.
Are the engine mounts for all/most of the conversions the same? I ask because there are diagrams, with sizings for making the mounts on pro-touring.com, but no mention of which vehicle they're for.
I want this for my 78 t/a. Also - in terms of just the motor mounts, is there much difference between the S&P and BRP style? One is more of a rectangle and the other is more of a trapezoid. I have a guy that can make these according to the diagrams, but before I send him off to do that I want to make sure he's making the right thing ....
Here's the diagram for the S&P style:
And here's the BRP style:
And does anyone know how these compare to the ATS mount?
Are the engine mounts for all/most of the conversions the same? I ask because there are diagrams, with sizings for making the mounts on pro-touring.com, but no mention of which vehicle they're for.
I want this for my 78 t/a. Also - in terms of just the motor mounts, is there much difference between the S&P and BRP style? One is more of a rectangle and the other is more of a trapezoid. I have a guy that can make these according to the diagrams, but before I send him off to do that I want to make sure he's making the right thing ....
Here's the diagram for the S&P style:
And here's the BRP style:
And does anyone know how these compare to the ATS mount?
Teching In
Joined: May 2005
Posts: 20
Likes: 0
The S&P style will set your motor back farther than the BRP style shown. I would measure my firewall clearence with the motor set in approximate place and decide which to use then. There are probably people who have the same combo who will chime in and tell you which work better.
Thread Starter
On The Tree
Joined: Dec 2005
Posts: 159
Likes: 0
From: Pacifica, CA
Originally Posted by Alexp
The S&P style will set your motor back farther than the BRP style shown.
And I suspect that the measurements given above were for a 1st gen conversion. Would they be the same for a 2nd gen conversion?
Launching!
Joined: Aug 2002
Posts: 242
Likes: 0
From: Los Angeles, CA
Originally Posted by nautiboy
[/img]
And does anyone know how these compare to the ATS mount?
And does anyone know how these compare to the ATS mount?
Tyler
S&P claims their mounts put back of the LS1 engine in the same place a regular SBC would sit.... not sure if I said that right, but they're made so you can swap an LS1 in where a SBC was, and the trans should line up with the back of the engine.
I ordered some S&P mounts and the tech there said that the engine would sit exactly where the old SBC did allowing me to bolt it right up to my th350 without moving anything. He said he had a 71 camaro with a th400 and the engine went in with those adapter plates no problem. I haven't put the engine in yet but soon I'll find out if he's BSing or not.
Also, I had a set of S&P style plates made from that first drawing and the holes should not be 9 /16 dia. IMO. That size is way to big. The dia. of the bolt goung into the block is alot smaller and the plate won't be very secure.
Also, I had a set of S&P style plates made from that first drawing and the holes should not be 9 /16 dia. IMO. That size is way to big. The dia. of the bolt goung into the block is alot smaller and the plate won't be very secure.
Trending Topics
Originally Posted by John McGraw
The S&P style plate will put the motor and trans mount in the same place as it was on an original smallblock.
Regards, John McGraw
Regards, John McGraw
olly
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
On The Tree
Joined: Dec 2005
Posts: 159
Likes: 0
From: Pacifica, CA
Originally Posted by Teetoe_Jones
Not even close to ours. We have tested out mounts/oil pan on a 2nd gen, and the fitment was perfect.
Tyler
Tyler
I also sent you a PM with a few other questions.
On The Tree
Joined: Nov 2004
Posts: 127
Likes: 0
From: childress tx
Originally Posted by nautiboy
Do you have to notch the frame for the a/c?
I also sent you a PM with a few other questions.
I also sent you a PM with a few other questions.
I have just purchased the s&p aluminum adapter plates and I am using energy suspension SBC motor mounts on a 68 corvette, but I can not get the holes to line up. I am off by about a 1/8" to 1/4" on both sides - the motor just will not drop down far enough to put a bolt through on both sides. s&p recommended using motor mounts off a 70 chevelle 305 - I purchased a set of these mounts and they are even worse. does anyone have any suggestions?
Thread Starter
On The Tree
Joined: Dec 2005
Posts: 159
Likes: 0
From: Pacifica, CA
This probably isn't going to help you much since you've already bought the S&P plates, but after taking a look at ATS's mounts, I think that's the way I'm going to go. They look very nice. Check 'em out:
http://www.classicchevy5speed.com/Am...pecialties.htm
And maybe Tyler has some advice on the fitment in your 'vette.
http://www.classicchevy5speed.com/Am...pecialties.htm
And maybe Tyler has some advice on the fitment in your 'vette.
Teching In
Joined: Feb 2006
Posts: 20
Likes: 0
From: SoCal
I used the BRP mounts, and was able to get the motor about 2 1/2" from the firewall (measured from the pass. side head) This leaves about 1/4" of the motor plate hanging off the back of the sub-frame. Unless you want to notch the frame, this is about as far back as set it as the alternator is very close to the frame (f body pulleys) Besides, any further back and you won't have much access to the back of the motor for wiring fuel lines and such.
The S&P A/C bracket is the way to go. Spendy stuff, but it is much better (IMO) than notching the frame. Good luck!
The S&P A/C bracket is the way to go. Spendy stuff, but it is much better (IMO) than notching the frame. Good luck!
Originally Posted by dynosmith
I have just purchased the s&p aluminum adapter plates and I am using energy suspension SBC motor mounts on a 68 corvette, but I can not get the holes to line up. I am off by about a 1/8" to 1/4" on both sides - the motor just will not drop down far enough to put a bolt through on both sides. s&p recommended using motor mounts off a 70 chevelle 305 - I purchased a set of these mounts and they are even worse. does anyone have any suggestions?
Originally Posted by dynosmith
I have just purchased the s&p aluminum adapter plates and I am using energy suspension SBC motor mounts on a 68 corvette, but I can not get the holes to line up. I am off by about a 1/8" to 1/4" on both sides - the motor just will not drop down far enough to put a bolt through on both sides. s&p recommended using motor mounts off a 70 chevelle 305 - I purchased a set of these mounts and they are even worse. does anyone have any suggestions?
Are you using the "preload plates"? They wont work with them, you have to use them without.
olly
Originally Posted by dynosmith
I have just purchased the s&p aluminum adapter plates and I am using energy suspension SBC motor mounts on a 68 corvette, but I can not get the holes to line up. I am off by about a 1/8" to 1/4" on both sides - the motor just will not drop down far enough to put a bolt through on both sides. s&p recommended using motor mounts off a 70 chevelle 305 - I purchased a set of these mounts and they are even worse. does anyone have any suggestions?
i had the same problem.
welded up my own.
as many people having this issue, why havent the the design of the mounts been changed?
Launching!
Joined: Sep 2005
Posts: 216
Likes: 0
From: Hong Kong
I am having the same problem fitting the LS2 into my Ultima GTR.... It all sounds a bit silly to me, I dont know why they are called adaptor plates when they are not.
Is there an off the shelf solution for this, or are ALL products "too wide" when you fit std SB mounts onto LS>SB adaptor plates.
I dont understand why they have adaptor plates for use with SB mounts when they dont fit anyway.... why not just make a mount that works.
Does anyone make a 1 piece mount? I know this question has been asked before, and the answer has been no. But hoping that someone might be doing it by now.
Is there an off the shelf solution for this, or are ALL products "too wide" when you fit std SB mounts onto LS>SB adaptor plates.
I dont understand why they have adaptor plates for use with SB mounts when they dont fit anyway.... why not just make a mount that works.
Does anyone make a 1 piece mount? I know this question has been asked before, and the answer has been no. But hoping that someone might be doing it by now.
Strange, the OTHER ultima guy was thinking of producing them. 
that's funny..
https://ls1tech.com/forums/showthrea...r+mounts+piece
ultima guys think alike, I think.
olly
that's funny..
https://ls1tech.com/forums/showthrea...r+mounts+piece
ultima guys think alike, I think.
olly