Thread: Engine setback

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Curious what thoughts were on engine setback for my 'maro. Wheelbase is 101". Rear end is a 9" with triangulated 4 bar. Engine will be a big block chebbie with a 5 speed transmission.... Not going drag race only on the car, kind of want to get a bit more weight to the rear of the car to help handling some.... Any ideas how much more engine setback would help, and how much aft of the spindle centerline would be a good spot to park the engine????

how far can you get it back with out setting in the back seat ? ? hell them car did not have much back seat sit in the back seat. as far as how much i would push it as far as i could go with out getting in to much pain

OH dave i have a donovan alum engine i can sell you .. ... NO BS I NEED TO SELL SOME STUFF

I know Pat!!! Got to get my pickup sold, no reason to try to make a deal with you now, too broke!!!!

Anyway, on the 'maro. The back seat area is already taken up with the upper bars for the four link....had to make them adjustable, ya know.... Firewall is not much of an issue, probably should find out how far forward I can get the shifter on the TKO trans. I think Mike Forte sells the forward shifter relocation kit....

Oh yeah, with the 5 speed, gotta keep the torque below 600 ft. lbs. so I don't break the tranny on the first pass!!!!

As you move the engine back you will start to have issues with first distributor clearance and the carb/manifold to windshield

Firewall is already cut, fabbing a new front crossmember so I can get the engine down a bit, too.....

Originally Posted by jerry clayton

As you move the engine back you will start to have issues with first distributor clearance and the carb/manifold to windshield

DAVE the distriburtor is not a any deal with the 632 donovan it has a belt drive and you can run off that for the dist. by the way it was on a digital scale from intake to pan 450 pounds

Originally Posted by pat mccarthy

DAVE the distriburtor is not a any deal with the 632 donovan it has a belt drive and you can run off that for the dist. by the way it was on a digital scale from intake to pan 450 pounds

That would be kewl!!!! I've got a crank trigger setup anyway, just need the BBC distributor part for it.... but the Donovan would be way, way kewl!!!! How the heck could you keep the torque below 600 though???? Gotta have my trusty 5 speed, can't be going shiftless this late in life!!!!!

Originally Posted by Dave Severson

Firewall is already cut, fabbing a new front crossmember so I can get the engine down a bit, too.....

the water pump hub center line the the front wheel spindle now that a start the one in the black GTO was 8inchs back or more front cowl was gone

Originally Posted by Dave Severson

That would be kewl!!!! I've got a crank trigger setup anyway, just need the BBC distributor part for it.... but the Donovan would be way, way kewl!!!! How the heck could you keep the torque below 600 though???? Gotta have my trusty 5 speed, can't be going shiftless this late in life!!!!!

pull some spark pull wires

Originally Posted by pat mccarthy

the water pump hub center line the the front wheel spindle now that a start the one in the black GTO was 8inchs back or more front cowl was gone

I've got a sbc mocked up in it now, it's back about 9" from the spindle centerline....

BBC aprox 2 inches longer---
is that a front or rear steer set up?
with a front mount rack--------!!!!!!!VW radiator, lite wt starter, thin wall headers,no heater/A-c, skinny wheels/brakes, alum hubs , trunk battery

Originally Posted by Dave Severson

I've got a sbc mocked up in it now, it's back about 9" from the spindle centerline....

i would think that would be good the alum bbc will be about the same as a sbc with alum heads . iron big block or a iron tall deck with alum heads is 588 with a chevy bow tie block. the dart big M would be bit more . so moving it back some more would help .get it on the scales and see were your at. the lb is now .would be nice to mock it up so you could slip it back and forth .to see were you would be with what block your going to use. you could do it with math .when you get the basic weigth down get it back to far you will not need a drive shaft just a coupler

Originally Posted by jerry clayton

BBC aprox 2 inches longer---
is that a front or rear steer set up?
with a front mount rack--------!!!!!!!VW radiator, lite wt starter, thin wall headers,no heater/A-c, skinny wheels/brakes, alum hubs , trunk battery

It's a front mount rack now, Jerry.... I have a dual pass aluminum radiator for it along with a bunch of other goodies... May have to do some oil pan and pickup mods, make the pan wider and not as tall.... Not sure yet, got a block coming next week to do some fitting with....

Originally Posted by Dave Severson

It's a front mount rack now, Jerry.... I have a dual pass aluminum radiator for it along with a bunch of other goodies... May have to do some oil pan and pickup mods, make the pan wider and not as tall.... Not sure yet, got a block coming next week to do some fitting with....

pan as to be a bit deeper for the 4.750 crank