LS3/LSX swap - engine mounts
#1
Burning Brakes
Thread Starter
LS3/LSX swap - engine mounts/driveline angles
LS3/LSX swap - engine mounts
so ive seen that great post on here, where everybody writes down the parts they have used to swap, but it doesnt really talk in detail about these parts used
so iam looking for engine mounts for my LSX B15 installing it into my 78 corvette with tremec t-56 gearbox, so which mounts kept the engine in its stock position, aiming to use poly bushed mounts, whats my optiins out there and what works best in peoples thoughts?
thanks for any help
so ive seen that great post on here, where everybody writes down the parts they have used to swap, but it doesnt really talk in detail about these parts used
so iam looking for engine mounts for my LSX B15 installing it into my 78 corvette with tremec t-56 gearbox, so which mounts kept the engine in its stock position, aiming to use poly bushed mounts, whats my optiins out there and what works best in peoples thoughts?
thanks for any help
Last edited by corvettedave383; 10-09-2018 at 01:51 PM.
#2
Drifting
Member Since: Nov 2004
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2020 C3 of the Year Finalist - Modified
LS3/LSX swap - engine mounts
so ive seen that great post on here, where everybody writes down the parts they have used to swap, but it doesnt really talk in detail about these parts used
so iam looking for engine mounts for my LSX B15 installing it into my 78 corvette with tremec t-56 gearbox, so which mounts kept the engine in its stock position, aiming to use poly bushed mounts, whats my optiins out there and what works best in peoples thoughts?
thanks for any help
so ive seen that great post on here, where everybody writes down the parts they have used to swap, but it doesnt really talk in detail about these parts used
so iam looking for engine mounts for my LSX B15 installing it into my 78 corvette with tremec t-56 gearbox, so which mounts kept the engine in its stock position, aiming to use poly bushed mounts, whats my optiins out there and what works best in peoples thoughts?
thanks for any help
#5
Burning Brakes
Thread Starter
some mounts i was thinking either
http://www.vetteworksonline.net/cata...php?cPath=9_69 or https://www.corvettemods.com/C3-Corv...t_p_18395.html
anyone use either and thoughts?
http://www.vetteworksonline.net/cata...php?cPath=9_69 or https://www.corvettemods.com/C3-Corv...t_p_18395.html
anyone use either and thoughts?
#6
Burning Brakes
some mounts i was thinking either
http://www.vetteworksonline.net/cata...php?cPath=9_69 or https://www.corvettemods.com/C3-Corv...t_p_18395.html
anyone use either and thoughts?
http://www.vetteworksonline.net/cata...php?cPath=9_69 or https://www.corvettemods.com/C3-Corv...t_p_18395.html
anyone use either and thoughts?
#7
Safety Car
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#8
Burning Brakes
Are those poly pushing with some compliance? I am not a fan of solid mounts on an aluminum block despite all the people who say no problem. My motor already sits too high but I have to wonder if it got lower that I might have another set of clearance problems to be solved.
here are the adapter plates on now
#10
Burning Brakes
Found it.. crap, link wont post
SR adjustable on ebay
Last edited by JVetthead; 08-25-2018 at 05:29 PM.
#11
Burning Brakes
Thread Starter
https://www.ebay.co.uk/itm/CHEVROLET...oAAOSwZjNba8Zx
these ones?
and your happy that engine is at same height as before, so no playing with propshaft angles?
these ones?
and your happy that engine is at same height as before, so no playing with propshaft angles?
Last edited by corvettedave383; 08-25-2018 at 06:00 PM.
#12
Burning Brakes
https://www.ebay.co.uk/itm/CHEVROLET...oAAOSwZjNba8Zx
these ones?
and your happy that engine is at same height as before, so no playing with propshaft angles?
these ones?
and your happy that engine is at same height as before, so no playing with propshaft angles?
#13
Burning Brakes
Thread Starter
for the guys that used the energy suspension poly style engine mounts, did you still use the backing plate? i get a feeling its not required because the lsx conversion plate acts as a backing plate?
anyone?
anyone?
#14
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Interesting question but I couldn't remember so I had to go out and look at my car. It is there, best I can tell and I think it was fitment issue with getting the original mounting bolt to line up. Without it the center to center distance to those mounting bolts becomes quite a bit smaller. It does of course make the motor sit even higher which was problem for me. This was five years ago just so you know. I posted a picture for you of the driver's side, here is the passenger's side. I guess you'll know when you try to drop the motor in what you need. Of course that becomes very awkward at that time. Looks to me like you will want it!
Best
Cliff
Best
Cliff
Last edited by ignatz; 09-05-2018 at 09:58 PM.
#15
Burning Brakes
Thread Starter
Thanks for your pic an reply, what does this backing plate actually do? would the lsx conversion plate mounted to engine do the same job as the backing plate?
#16
I ended up using the LSX innovations plates that move the engine forward 1". I originally tried the 3 position ones they offer (stock, 7/16, 1.75, 2.25), but it didn't work for me. I think the reason I ended up with the 1" was then I could use a stock c4 auto driveshaft. From what I remember too, I wanted to go forward to make sure the tranny cleared the tranny tunnel (that fit check will be coming in the next month or two for me with any luck).
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corvettedave383 (09-06-2018)
#17
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This fits and everything works, any experimenting with and without is up to you! I cannot comment on alternatives.
Last edited by ignatz; 09-06-2018 at 01:52 PM.
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corvettedave383 (09-06-2018)
#18
Burning Brakes
Thread Starter
As mentioned, this is from five years ago. Let me repeat myself. "Without it the center to center distance to those mounting bolts becomes quite a bit smaller." I am suggesting that if you drop the motor in without these plates, the center-to-center distance between the mount holes would not match the center-to-center distance between the frame holes. From the picture it does not look like the mounts could move up on the slant to accommodate the chang in distance between the two.
This fits and everything works, any experimenting with and without is up to you! I cannot comment on alternatives.
This fits and everything works, any experimenting with and without is up to you! I cannot comment on alternatives.
#20
Burning Brakes
Thread Starter
Thats the engine in, looks ok for position , need to get gearbox in next see how that all looks
Last edited by corvettedave383; 09-16-2018 at 02:22 PM.