all you need is a short piece of L channell run on about a 45* angle from the cradle to about 1/2 way up your post .that will stop any flexing .if you are going to have some sort of bottom mount you wont need another dog bone.these motors do not shake .i even considered solid mounts at one time.
Bottom Mount I mean using the 4 cylinder dogbone as the bottom mount, I would place it underneath the water pump on the ecotec
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11:36 PM
Mar 14th, 2007
wftb Member
Posts: 3692 From: kincardine,ontario,canada Registered: Jun 2005
one of of your mounts has to be able to hold up the engine without sagging .i dont know if two dogbones will do that.after you have both mounts done , put all your weight on the engine and see if you have any downward movement. you should not be able to move the engine downward at all .
Holding up the weight of the motor is an easy task compared to holding several thousand foot pounds of torque... That is what you need to be worried about when designing motor mounts.
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01:34 PM
wftb Member
Posts: 3692 From: kincardine,ontario,canada Registered: Jun 2005
thats what is nice about using the stock cavalier mounts . all the design work has been done already by gm.but if the mounts will take the weight and go in opposite directions from each other , handling 160 lbs of torque wont be a problem .with its balance shafts , the ecotec doesnt noticeably move when you rev it .keep in mind he is also using the stock fiero tranny and mounts so everything will be correctly located and those mounts also will control torque .
Holding up the weight of the motor is an easy task compared to holding several thousand foot pounds of torque... That is what you need to be worried about when designing motor mounts.
A diesel engine rated at over 1000 hp?
Id go with solid mounts, even with an engine that doesnt have balance shafts. I'm not too worried about rough riding at idle, but maybe you are, so meh.
Id go with solid mounts, even with an engine that doesnt have balance shafts. I'm not too worried about rough riding at idle, but maybe you are, so meh.
Well how I mounted the bottom of the mount it doesnt move much, even when the jbody people remove the balance shafts and put neutral ones in the motor still doesnt feel rough, from what I told it takes away the engine braking.
The 4 cylinder dogbone is just more as a precaution more of a 'leash' for the bottom of the engine.
I have some update pictures but I cant load em up until I get to school tomorrow
I'm not sure what the gear ratios in the cavalier trans are, but assuming first gear is around 3 and final drive is around 3, you'll have 160 X 3 X 3 = 1440 ft lbs.
engine braking is a product of compression .take the fuel away from an engine ,and it becomes an air compressor without a motor .increasing your rotating mass decreases compression braking by increasing the flywheel effect.but i dont think the balance shafts weigh enough to make a noticeable difference .
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11:27 AM
sYkboy Member
Posts: 162 From: New Castle, IN, USA Registered: Mar 2006
They don't create a lot friction, they add to rotating mass which as you pointed out could detract from engine breaking, right? Or am I just having a day.
Though, I suppose, having that mass would make it speed up to RPM slower on down shifts there by initially taking more force.
[This message has been edited by sYkboy (edited 03-16-2007).]
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12:44 PM
PFF
System Bot
May 13th, 2007
longjonsilver Member
Posts: 1098 From: Lower Sackville, Nova Scotia Registered: Nov 2001
where can i get such an adapterplate ?? and whats the price iam planning to swap in an 2.0 Ecotec , perhaps the 2.0 turboecotec c20let is it called here and i want to keep my TH125C
------------------ 1984 Fiero Sport 1987 Fiero <- Ethanol powered Batmobile 1984 Fiero SE 1999 Chrysler Grand Voyager 3.3 LX <-LPG powered family car
*** nuclear winter cures global warming ***
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10:55 AM
Aug 17th, 2008
fieroturbo Member
Posts: 1085 From: Orefield, PA Registered: Jan 2003
C2 pin 47 (BLACK) to chassis ground C2 pin 49 (GRAY) to C500 pin B1 C2 pin 50 (RED) to C500 pin B3
No more jerry-rigged stuff! YAY!
------------------ Petty Officer Michael C Casaceli Aircraft Electronics Technician Second Class AIMD Brunswick (2007-present) Patrol Squadron Ten (2003-2007) United States Navy
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03:39 PM
Tanlrat Member
Posts: 154 From: Buckeye, AZ, USA Registered: May 2008
Well if i ever get the funds, I'm planning on putting the 2.0 ECOTEC DFI turbo in. The engine code is LNF, and GM stock rating is 260hp from the first GM direct fuel injection turbo engine. From what i have read the engine can take up to about 40psi in boost stock, hmmmmm mods.... Can't wait till the next GM race engine manual for the ECOTEC to see what they have come up for this engine.
The balance shafts are there to smooth out the 4 banger, they are know to be a little rough on the bones on idle. Take those out and you do have a few more ponies under the hood.
The engine has vvt but i plan on using the ECOTEC's engine computer in conjuction of the solsitce BCM. There should be mods for the computer now if not near future for the computer.
I plan on using the 2006 G6 F40 6speed manual with it, The gear ratio and final drive is what i'm looking for... want to be able to cruise @ 85MPH with the RPM @ about 2000~2400 and still be able get there quick.
