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Author Topic:   Moving engine back.
eaton89
Member
posted January 02, 2004 08:47 PM
I have a metric olds and our rules this year will alow you to move engine back. How much is best and what does it take to move the fire wall and remount engine mounts. I'm not worried about trans mount cause its very easy to fix but not sure about the engine mounts. I dont have to use stock mounts. How far back works best.Car weights about 3300 lbs.


racing north
Member
posted January 02, 2004 08:53 PM
Move it back as far as the rules allow. Our class allowed the #1 plug to be in line with upper ball joint, amounted to roughly 2 inches. As you move the motor back it will increase the rear percentage. As far as the firewall, depends on the rules. We did not have to have the stock wall or appearing. hope this helps.


eaton89
Member
posted January 02, 2004 09:26 PM
We do have to have stock appearing fire wall but we can work it over a little. I thought I could take a sawsall and cut around the area and then cut a piece of the back move the hole piece back a few inches and add a new piece in the front so everything moves back if this makes any sense to anybody. Has anyone done it like that or am I smoking something?


nwdirtmod2
Member
posted January 02, 2004 09:40 PM
Most streetstock rules only alow for moving the motor as far back as number one plug in line with upperball joint. With that there is any clearance problems. Much past that you will have to do alot of cutting. I would go as far as possible with the stock fire wall. When you get it were you want all you have to do is weld the mounts in there new position.

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Keep it sideways!


eaton89
Member
posted January 02, 2004 09:49 PM
Max movement is not to exceed 10% of wheelbase. Thats a **** of alot of moving, kinda sounds crazy to me if the fire wall is to be stock appearing. I think I will try moving it back to the fire wall like Nwdirtmod said and see what it looks like and how much farther it is from original.Anything gained is better than it sets now right! And I like the sound of moving it a inch or so and welding it down and being done with it. Thanks. Happy New Year.


bobaluuu
Member
posted January 02, 2004 09:51 PM
[ be aware that when you work the firewall its usually in the same area as the gas pedal
and can create some difficulty there. we cut the floor completely across and cut out 3 inches and rewelded but, the doors and roofline also had to be shortened that much too. We also cut out the door pillars at same time and overall reduced weight about
30 lbs. I swear the tech guys never figured it out. siliconed and painted over the welds.

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Light it up, Baby!


eaton89
Member
posted January 02, 2004 10:01 PM
Now thats a hard core racer. I'm not looking to do that much work. I'd like to move motor back cut the drive line ,fix the shroud and reweld some mounts and be done. That will work until the group at our track gets alot faster than they are. If they only new about this forum. Maybe after I get over last year I will tell them. Tracks new and so are the drivers including me. We only had one tech the hole year and we told him.Know we have some rules for next year.


dirtrace
unregistered
posted January 02, 2004 10:49 PM           
2 quick points.

I moved a street stock motor 1.5 inches and gained .3 of rear wt. A lot of work for little in my mind, if youve got any lead you can move or even moving your battery can get you that if move it far enough!!

A guy that started the demise of our sportsman class about 5 years ago, had a 4 inch piece of oem firewall left in the car in the stock location.

The rule read as "firewall in stock location" he was the favorite and they said it was legal. I guess it should have read "complete firewall in stock location"???

BIGDADDYBOZ
Member
posted January 03, 2004 02:19 AM
My only question is what motor you running? If it's a Chevy with a stock fuel pump you can't move it back that far with out modifing the cross member! You'll have better luck with moving the body back!


eaton89
Member
posted January 03, 2004 05:42 PM
I never thought about the fuel pump. When I get the motor back together I'm going to set it in and move it back and see what happens. I guess I'll either do what needs to be done to move it back or leave it in stock location if all else fails.


racerguy500
Member
posted January 03, 2004 06:32 PM
Wow,
10% of the wheelbase is what you are allowed to set it back? That is almost 11". If you notch the frame for the fuel pump (and box it back in well) remove your body mounts and bushings to slide the body back and beat the **** out of the firewall with a big hammer, you might get 5" out of it. Now if you leave the firewall and modify the tunnel then you can get a few more inches. Alot of work and creativity can get involved for sure, is it worth it? YEP, that is why it is done and everybody gets creative to do it. If all your rules say is stock firewall and don't dictate where it is, cut it out, slide it back, weld it back in and build some crush panels to fill the side gaps and a panel on the dash to fill the front gap to the hood. I don't see cutting the doors and roof pillars


Eljojo
Member
posted January 03, 2004 08:35 PM
If you are allowed 10% then you can move yorur motor back about 10 3/4" That will take some work, but will be more than worth the effort. If you don't put the work into it-you can be sure that one of your competitors will! I would sawzall the center of the firewall out and build motor mounts similar to a Mod. Then I would replace the firewall around the motor. You may have to relocate yur pedals-but what the heck?


redneck racing
Member
posted January 04, 2004 03:21 PM
I leave mine in the stock location because its easier that way. Most of the rules around here state the #1 plug has to be in line with the upper ball joint so I really dont see that an inch or so is gonna make that much of a difference. Eddie


hjoe
Member
posted January 20, 2004 09:06 PM
well if you dont plan on racing anywhere else then move it but if you plan on racing at other tracks they probably wont allow u to run sometimes it is easier to conform to other tracks rules instead of just making your own.


zeroracing
Member
posted January 20, 2004 09:19 PM
Well I just got back from a meeting 10 minutes ago. What a bunch of #@#@%^$. I'm just going to have to wait a little longer before I do another thing to the car. They cant make up their minds what they want to do. If I didnt have so much money tied up in this car I would get rid of it(probably not)


Darren Scott
Member
posted January 21, 2004 08:05 AM
Shove the motor back to the firewall, modify some mounts to suit, but keep your old ones handy, just in case your wise and learned officials backflip on you....by the way, consider how much lower you can drop your motor when you do this, cos a lower centre of gravity never hurts.


zeroracing
Member
posted January 21, 2004 08:59 AM
i would not drop the motor too much, maybe some but you want to keep the cg decently high so you can get bite. the motor up higher will make the car roll over on dryslick.