Danno74Z Posted October 21, 2012 Share Posted October 21, 2012 Hi All, I need some help. Can a few members with LSx blocks take a couple of measurements for me? I'm in the process of locating my LS1 engine in the DatsunZ bay and I know the engine is offset to the passenger side by some amount. I'm doing my own mounts and this information would be a huge help. Can you measure from the frame rails both left(driver) and right(passenger) straight over to the engine block. Most folks use John's mounts and that is fine. To the 1/8" is fine. THANKS!!!!! Danno74z Quote Link to comment Share on other sites More sharing options...
v8dats Posted October 21, 2012 Share Posted October 21, 2012 Funny i just made a post about posting pics of your custom mounts. Good luck and please post pics. Quote Link to comment Share on other sites More sharing options...
Danno74Z Posted October 21, 2012 Author Share Posted October 21, 2012 (edited) v8dats, Help me out here. Where is your post about wanting pictures of my mounts? I went to your most recent posts and I don't see your request. Never mind, I dug a little deeper and I found your post. I don't have the mount system totally designed just yet but it will be very similar to my test engine stand mounting system. The system uses biscuit mounts that are found on the 2005 GTO and probably the vet. It has two vertical "towers" which are bolted to a horizontal crossmember. That crossmember is then bolted to the Datsun framerails that I have reinforced with 1/8" flat steel. My existing framerails in the engine compartment were in fine shape - no rust but I'm in the process of building my framerails that follow the floor pans. Those were totally shot and bent. As soon as I finish those on to the engine installation. But I need some help from members to my original request for engine placement. Danno74Z Edited October 21, 2012 by Danno74Z Quote Link to comment Share on other sites More sharing options...
mattd428 Posted October 21, 2012 Share Posted October 21, 2012 i centered mine in the engine bay. I measured from the center of the crank pulley to the frame rail. Quote Link to comment Share on other sites More sharing options...
Danno74Z Posted October 21, 2012 Author Share Posted October 21, 2012 I thought if you center the engine between the rails you have no room for the exhaust header on the driver's side as it hits the steering shaft? That is the reason the engine is shifted slightly to the passenger side using John's mounts? I'm thinking about 1.5" but want to be sure. Danno74Z Quote Link to comment Share on other sites More sharing options...
wfritts911 Posted October 21, 2012 Share Posted October 21, 2012 I think mine was offset towards the passenger side just a little bit. Don't over think it though, unless you have scales and are trying to position the engine to even out the side to side weight balance, offsetting it any amount is just guessing. I posted a link to my custom mounts in the mentioned thread. Don't worry to much about meeting some "requirements" about the engine position. If it fits its going to work. I think the only measuring I did on my engine position was to make sure it was straight in the engine bay and the crank pulley wasnt hitting the rack and pinion(Your pinky finger works good there). What it comes down to is put it as low down and as far back as you can get it, maybe offset it a 1/4 inch to the passnger side and make sure its straight, and make sure the shifter fits. Get to welding! -Will Quote Link to comment Share on other sites More sharing options...
mattd428 Posted October 21, 2012 Share Posted October 21, 2012 The steering shaft is in the way i used c6 manifolds and had to smash the pipe to make it fit. But i plan on doing a turbo so the steering shaft wont be a problem at that point. Quote Link to comment Share on other sites More sharing options...
Danno74Z Posted October 22, 2012 Author Share Posted October 22, 2012 After a little research from the original JTR book both the Datsun engine and the new Chevy350 engine are offset to the passenger side by 3/4". The spacers that JTR sells and has diagrams for calls for 2.5" and 1.5" spacers. I guess to make it easy he added the 1/4" to the driver's side. I will use 3/4" as a starting point. Danno74Z Quote Link to comment Share on other sites More sharing options...
mark Posted October 22, 2012 Share Posted October 22, 2012 I centered mine Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted October 22, 2012 Administrators Share Posted October 22, 2012 When I built mine I lined the motor up with the pinion flange of the diff. This worked fine for the common Sanderson headers. Quote Link to comment Share on other sites More sharing options...
Litman Posted October 22, 2012 Share Posted October 22, 2012 (edited) I fabricated a cross brace and brackets to facilitate using C5 Corvette motor mounts. I am keeping the accessories which the JCI mounts don't play friendly with. I know the mounts are equidistant from the frame rails therefore I suspect my motor is dead center. When you indicate GTO biscuit mounts is this what you mean? If so I can provide motor mount measurements with respect to the frame rails. Edited October 22, 2012 by Litman Quote Link to comment Share on other sites More sharing options...
Danno74Z Posted October 24, 2012 Author Share Posted October 24, 2012 Litman, You did exactly what I'm doing - Awesome! Yes I have those rubber mounts purchased from GM. I will PM you tonight. Danno74Z Quote Link to comment Share on other sites More sharing options...
Litman Posted October 24, 2012 Share Posted October 24, 2012 Excellent! I will look for your PM. The drivetrain is not currently in the car but I should be able to take numerous measurements & additional pictures to help with your fabrication. Quote Link to comment Share on other sites More sharing options...
Danno74Z Posted October 25, 2012 Author Share Posted October 25, 2012 Email Sent. Quote Link to comment Share on other sites More sharing options...
heavy85 Posted October 27, 2012 Share Posted October 27, 2012 If you plan to race competitively and are concerned with weight distribution then as far to the right as will fit to offset the left heavy bias that inevitably happens with the driver. If it's just a street car it probably doesn't matter and do what's easy. I think mine is offset 3/4". Everything fits well but I'm still at 51% left side weight so it could stand to go over even farther if it would fit. Cameron Quote Link to comment Share on other sites More sharing options...
Danno74Z Posted October 28, 2012 Author Share Posted October 28, 2012 Thank You all for helping me out on this. Danno74Z Quote Link to comment Share on other sites More sharing options...
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