Solid Motor Mounts for the racers
#1
all aboard!
Thread Starter
Solid Motor Mounts for the racers
I'm having some solid motor mounts made, was wondering if anyone was interested in jumping on board. Faster throttle response and the engine becomes a stressed member of the chassis.
Mounts will be made of 4160 steel and will be a bolt in replacement for your cushy rubber mounts. Cost will be about $50 for the pair.
Mounts will be made of 4160 steel and will be a bolt in replacement for your cushy rubber mounts. Cost will be about $50 for the pair.
#4
that doesnt seem like to good of a idea for racers, the torque brace would do the same thing and allow some movement. imo all it would do is transfer the forces right to the front cover and cracko
#6
Old [Sch|F]ool
Just run a $2 cable from the top of the front side housing to the left strut tower... that way the engine isn't a stressed member and you don't have a ton of vibration, yet the engine doesn't rock over under acceleration.
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#8
Senior Member
run a wire from the front housing to the strut tower? how do you attach it to the housing? weld a bolt on there? and how much slack do you leave, and why the left strut tower? is that the direction it likes to tweak?
#9
Old [Sch|F]ool
You get the length of cable and two cable clamps so you can make cable eyes at each end. I used the front lift eye bolt for the engine side connection, made the cable too short to attach to one of the strut bolts, then pulled on the engine with my left hand and slipped the cable over the strut with my right. After a week or two it stretched so I had to take up the slack with a cheapo "emergency E-brake cable tensioner". I also slit a long vacuum hose and slid it over the cable, just because it ran close to the coil towers. (custom ignition)
And it made a big difference... no more engine bouncing around after a hard shift.
You attach it to the left side because you can't push on a rope
And it made a big difference... no more engine bouncing around after a hard shift.
You attach it to the left side because you can't push on a rope
#12
Nikki-Modder Rex-Rodder
Join Date: Feb 2001
Location: Trying to convince some clown not to put a Holley 600 on his 12a.
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Being a completely untrusting soul in todays "Ya gotta look out fer number one, man..." world, due in part to my pesimistic nature combined with my disgust for todays' youth and their lack of marals and respect; and just being a general ****-all bitter person upon leaving the warm, wet, silent, dark sanctity of mine mothers womb, I gotta say that this is so obviously...
a scam!
What ******* machine shop is charging you 50 bucks for some steel hockey pucks?! And what machine shop did'nt tell you that the more you order the lower the price...Had you looked into it.
Of course you did. And of course they did. And so the opportunity presented itself to you.
And "4160" steel...for what?
A knowledgeable racer would've offered them to everyone in one of the nearly 40 applicable plastics that are available, easy to machine, extremely durable, non-deteriorating, and very much lighter than a giant chunk of steel.
Absolutely NO info about you in your profile.
Hmmmmm....Sure - I'll mail ya a check, dude.
Now please tell me I'm wrong, and then I'll appologize.
a scam!
What ******* machine shop is charging you 50 bucks for some steel hockey pucks?! And what machine shop did'nt tell you that the more you order the lower the price...Had you looked into it.
Of course you did. And of course they did. And so the opportunity presented itself to you.
And "4160" steel...for what?
A knowledgeable racer would've offered them to everyone in one of the nearly 40 applicable plastics that are available, easy to machine, extremely durable, non-deteriorating, and very much lighter than a giant chunk of steel.
Absolutely NO info about you in your profile.
Hmmmmm....Sure - I'll mail ya a check, dude.
Now please tell me I'm wrong, and then I'll appologize.
#14
I can has a Hemi? Yes...
iTrader: (2)
Originally posted by Sterling
Being a completely untrusting soul in todays "Ya gotta look out fer number one, man..." world, due in part to my pesimistic nature combined with my disgust for todays' youth and their lack of marals and respect; and just being a general ****-all bitter person upon leaving the warm, wet, silent, dark sanctity of mine mothers womb, I gotta say that this is so obviously...
a scam!
What ******* machine shop is charging you 50 bucks for some steel hockey pucks?! And what machine shop did'nt tell you that the more you order the lower the price...Had you looked into it.
Of course you did. And of course they did. And so the opportunity presented itself to you.
And "4160" steel...for what?
A knowledgeable racer would've offered them to everyone in one of the nearly 40 applicable plastics that are available, easy to machine, extremely durable, non-deteriorating, and very much lighter than a giant chunk of steel.
Absolutely NO info about you in your profile.
Hmmmmm....Sure - I'll mail ya a check, dude.
Now please tell me I'm wrong, and then I'll appologize.
Being a completely untrusting soul in todays "Ya gotta look out fer number one, man..." world, due in part to my pesimistic nature combined with my disgust for todays' youth and their lack of marals and respect; and just being a general ****-all bitter person upon leaving the warm, wet, silent, dark sanctity of mine mothers womb, I gotta say that this is so obviously...
a scam!
What ******* machine shop is charging you 50 bucks for some steel hockey pucks?! And what machine shop did'nt tell you that the more you order the lower the price...Had you looked into it.
Of course you did. And of course they did. And so the opportunity presented itself to you.
And "4160" steel...for what?
A knowledgeable racer would've offered them to everyone in one of the nearly 40 applicable plastics that are available, easy to machine, extremely durable, non-deteriorating, and very much lighter than a giant chunk of steel.
Absolutely NO info about you in your profile.
Hmmmmm....Sure - I'll mail ya a check, dude.
Now please tell me I'm wrong, and then I'll appologize.
I've never noticed him trying to sell anything (I notice that)
There are no requirements to your profile, I can understand and respect that decision, people can use all your information against you. I don't see him as a scammer, as it is, - everything on the internet is Buyer Beware.
Also, The Steel engine mounts were very popular when I used to Street race back in the day. It was overkill for anything but a bridgeport, or full blown drag racer though.
Giving him (and everyone here) the benefit of the doubt, it's probably the shop that is either still in the V8 mentality OR stuck in a Rotary Time Capsule.
Last edited by Directfreak; 04-29-02 at 08:20 AM.
#15
Nikki-Modder Rex-Rodder
Join Date: Feb 2001
Location: Trying to convince some clown not to put a Holley 600 on his 12a.
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O.K.
Sorry, Nimrod. My bad.
I'm still ****-all bitter about having to leave the womb, though.
Well...I guess it's not really your fault.
Please accept.
Sorry, Nimrod. My bad.
I'm still ****-all bitter about having to leave the womb, though.
Well...I guess it's not really your fault.
Please accept.
#16
Admitted Sevenaholic
Join Date: Feb 2001
Location: Ashland, OH
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Solid motor mounts from 7075 T-6 Billet Aluminum.
Comes with nuts and bolts.
RX7 79 thru 85 part#1043
71-85 RX2-X3-X7 SOLID BILLET ALUMINUM ENGINE MOUNTS
(NOT FOR STREET USE). $69.99
http://www.mazdacomp.com/
Comes with nuts and bolts.
RX7 79 thru 85 part#1043
71-85 RX2-X3-X7 SOLID BILLET ALUMINUM ENGINE MOUNTS
(NOT FOR STREET USE). $69.99
http://www.mazdacomp.com/
#17
all aboard!
Thread Starter
Originally posted by Sterling
O.K.
Sorry, Nimrod. My bad.
I'm still ****-all bitter about having to leave the womb, though.
Well...I guess it's not really your fault.
Please accept.
O.K.
Sorry, Nimrod. My bad.
I'm still ****-all bitter about having to leave the womb, though.
Well...I guess it's not really your fault.
Please accept.
#18
all aboard!
Thread Starter
Ok, checked into it, gonna get some delrin ones put together. Getting the estimate in a couple days. I'm just gonna do a run of four mounts, I'll test 'em out and take some pictures, then see if its worth my time to sell a few pairs.
#19
Nim, the stock mount appears to be just a puck to isolate and support the engine. I think the delrin would work if there is no side to side (fore aft) movement of the drivetrain. You may wan to sleeve the Delrin like a control arm bushing is. Delrin machines easily. The pass through bolt should be very very strong.
#21
Old [Sch|F]ool
It will have to absorb all of the shock and vibration.
Regular motor mounts have give to them, so the bolts don't see high shock loads or heavy vibration working against them... the rubber damps that out.
That's why I'm against the idea of solid motor mounts, because SOMETHING will have to give, and I'd rather that it be a squishy motor mount than the somewhat flimsy front cover. To control the torque-over I just made the tension strap described above, similar to V8/GN drag racer guys who chain the left side of their engine to the frame.
Regular motor mounts have give to them, so the bolts don't see high shock loads or heavy vibration working against them... the rubber damps that out.
That's why I'm against the idea of solid motor mounts, because SOMETHING will have to give, and I'd rather that it be a squishy motor mount than the somewhat flimsy front cover. To control the torque-over I just made the tension strap described above, similar to V8/GN drag racer guys who chain the left side of their engine to the frame.
#22
Banned. I got OWNED!!!
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Originally posted by peejay
To control the torque-over I just made the tension strap described above, similar to V8/GN drag racer guys who chain the left side of their engine to the frame.
To control the torque-over I just made the tension strap described above, similar to V8/GN drag racer guys who chain the left side of their engine to the frame.
LATERZ
#24
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I just had a ride in a 1st gen RX-7 with solid motor mounts in it. And I am ******* telling you right now it is now bad at all. There is almost zero vibration. The shitty mounts in my Mekur XR4ti are worse than a Solid Motor Mount equipped car. At 8000rpm there isnt any more vibration that at 3000rpm. And the funny thing is, i was just asking wether or not the car had them installed out of curiosity, I was expecting a no. And than he says yeah. I was amazed. It was smooth and it wasnt rough AT ALL. SO PLEASE PUT THIS TO REST. A SOLID MOTOR MOUNT EQUIPPED 12A DOES NOT DO ANY HARM!!!!!
#25
all aboard!
Thread Starter
That's funny, I pretty much forgot all about this project. I never did it, but I guess it's going back on the to-do list now. Maybe I'll just replace the rubber in the originals with some welded in mild steel instead of all the overly ambitious plans I had before.