Author Topic: HELP, Challenger hood clearance question?  (Read 2312 times)

Offline mellowguy

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HELP, Challenger hood clearance question?
« on: September 17, 2013 - 01:38:30 AM »
I hope some Challenger owners can answer my questions. I want to get some after market heads. Maybe Indy 440 EZ, and a EFI intake. From the bottom of the EFI intake to the tallest point is 9 3/4 inches. Indy 440 ez will raise everything  about 1/2 inch over using stock height type heads, according to INDY. That is a total of 10 1/4 inches. Also I have a  Power bulge hood. Motor is not built. SO there is NO way of me measuring anything. I was wondering if any members with either a tall after market air cleaner, or taller than stock manifold, carb, tall air cleaner combination that is especially close to contacting the inside top of the power bulge hood (Not a flat hood), could measure the bottom of the intake to the top of the air cleaner to see if this thing I am considering, would clear the inside top of my hood. Again, I need the measurment height of a tall combo intake, carb, and air cleaner that is close to contacting the inside top of a Challenger with a power bulge hood. Thanks everybody :-)
« Last Edit: September 17, 2013 - 01:41:10 AM by mellowguy »




Offline cudabob496

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Re: HELP, Challenger hood clearance question?
« Reply #1 on: September 18, 2013 - 03:03:59 AM »
I hope some Challenger owners can answer my questions. I want to get some after market heads. Maybe Indy 440 EZ, and a EFI intake. From the bottom of the EFI intake to the tallest point is 9 3/4 inches. Indy 440 ez will raise everything  about 1/2 inch over using stock height type heads, according to INDY. That is a total of 10 1/4 inches. Also I have a  Power bulge hood. Motor is not built. SO there is NO way of me measuring anything. I was wondering if any members with either a tall after market air cleaner, or taller than stock manifold, carb, tall air cleaner combination that is especially close to contacting the inside top of the power bulge hood (Not a flat hood), could measure the bottom of the intake to the top of the air cleaner to see if this thing I am considering, would clear the inside top of my hood. Again, I need the measurment height of a tall combo intake, carb, and air cleaner that is close to contacting the inside top of a Challenger with a power bulge hood. Thanks everybody :-)


You can buy some playdough, and roll up balls, and place them on different locations of your air cleaner, close hood, open hood, and you will see how much
clearance you have by how much the balls of playdough are squished.

These guys sell drop base air cleaners.

http://www.ramairbox.com/bases.html

I machined 3/8 inch off the top of my M1 single plane intake to help with hood clearance, and I also
modified the brackets under the stock hood.
« Last Edit: September 18, 2013 - 03:08:44 AM by cudabob496 »
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

2011 Kawasaki Z1000

Offline mellowguy

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Re: HELP, Challenger hood clearance question?
« Reply #2 on: September 18, 2013 - 03:52:38 PM »
Thank you, I thought of that but. I have no way to do that because  the motor is unassembled waiting for my decidion on the heads and intake/EFI. I need to know how much room I have to play with to buy the appropriate pieces that will fit.

Offline HP_Cuda

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Re: HELP, Challenger hood clearance question?
« Reply #3 on: September 18, 2013 - 07:52:59 PM »

Hey Bob

Can you measure from the valleypan hold-down to the top of your air cleaner and let me know.

I need to downside my K&N filter and would rather only doing it once as they are not cheap.

Thanks,
Bryan
1970 Cuda Clone 440 4 speed - sublime green
1970 Cuda 383 4 speed - yellow - SOLD

Offline cudabob496

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Re: HELP, Challenger hood clearance question?
« Reply #4 on: September 18, 2013 - 10:29:56 PM »
Hey Bob

Can you measure from the valleypan hold-down to the top of your air cleaner and let me know.

I need to downside my K&N filter and would rather only doing it once as they are not cheap.

Thanks,
Bryan

Well, here's my present setup. I was able to eventually get a 4 inch tall K&N in there,
but I have an aftermarket fiberglass hood, which prob gives more clearance than a stock
metal hood. Look at this picture, and let me know if you still need dimensions.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

2011 Kawasaki Z1000

Offline HP_Cuda

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Re: HELP, Challenger hood clearance question?
« Reply #5 on: September 19, 2013 - 12:16:47 PM »

Bob

Yeah just measure from the valley pan hold down to the top of your air intake box.

I'm guessing it's something like 9 1/2" at most.

B
1970 Cuda Clone 440 4 speed - sublime green
1970 Cuda 383 4 speed - yellow - SOLD

Offline mellowguy

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Re: HELP, Challenger hood clearance question?
« Reply #6 on: September 19, 2013 - 03:47:02 PM »
Hello cuabob496,

I also have a aftermarket fiberglass hood, power bulge RT design fiberglass hood by AAR/ Stinger Fiberglass. If you could measure from the outside very bottom of the intake manifold runner to the top, very top, of the air cleaner top. Also could you approximate how much clearance you have from top of air cleaner to the top inside of the hood. I really appreciate it. Thanks a lot.

AL

Offline cudabob496

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Re: HELP, Challenger hood clearance question?
« Reply #7 on: September 19, 2013 - 07:16:02 PM »
WHY MEN SHOULD NOT WRITE ADVICE COLUMNS:

Dear John,

I hope you can help me. The other day, I set off for work leaving my husband in the house watching the TV. I hadn't driven more than a mile down the road when the engine conked out and the car shuddered to a halt. I walked back home to get my husband's help. When I got home I couldn't believe my eyes. He was in our bedroom with the neighbour's daughter. I am 32, my husband is 34, and the neighbour's daughter is 19. We have been married for ten years. When I confronted him, he broke down and admitted that they had been having an affair for the past six months. I told him to stop or I would leave him. He was made redundant six months ago and he says he has been feeling increasingly depressed and worthless. I love him very much, but ever since I gave him the ultimatum he has become increasingly distant. He won't go to counselling and I'm afraid I can't get through to him anymore. Can you please help?

Sincerely,

Sarah


Dear Sarah:

A car stalling after being driven a short distance can be caused by a variety of faults with the engine. Start by checking that there is no debris in the fuel line. If it is clear, check the vacuum pipes and hoses on the intake manifold and also check all grounding wires. If none of these approaches solves the problem, it could be that the fuel pump itself is faulty, causing low delivery pressure to the injectors.

Sincerely,
John
« Last Edit: September 19, 2013 - 07:19:08 PM by cudabob496 »
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

2011 Kawasaki Z1000

Offline cudabob496

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Re: HELP, Challenger hood clearance question?
« Reply #8 on: September 19, 2013 - 08:41:49 PM »
OK, from the top of the valley pan hold down bar (which is essentially the bottom of the intake), to
the front top lip of the ram air box, is 10.25 inches.  From the the lip, to the top of the air cleaner lid,
is one inch.  From the top of the air cleaner lid, to the bottom of my hood, is 4/10 of an inch. I have
an M1 single plane intake, but have machined off about 3/8 of an inch, and added a phenolic spacer
to that part, and I have ground down the lip on the air cleaner, that rests on the carb, to try to
make more of a drop base air cleaner.  I also had to dent the bottom of the air cleaner to eliminate
some interference with the carb linkage. My goal in all this was to use a 4 inch tall K&N filter, instead
of a 3 inch.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

2011 Kawasaki Z1000

Offline mellowguy

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Re: HELP, Challenger hood clearance question?
« Reply #9 on: September 19, 2013 - 11:42:35 PM »
cudabob496, let me get this correct. From the  bottom of the intake runner to the top of the inside of the hood is 10.25 + 1.00 + 4/10= 11.65 inches, is that correct?  You do have a RT, power bulge hood? Just want to make sure you do have a RB big block? Who was the manufacture of your fiberglass hood? That is 11.65-10.25= 1.4 inches. If this is roughly correct that would be about 1.4 inches of clearance for what I have planned. How much room would be the minumum clearence? Would the torquing of the motor, present a problem. I am alredy going  to install interlocking motor mounts and torque straps on each side. What do you think?
« Last Edit: September 19, 2013 - 11:46:15 PM by mellowguy »

Offline cudabob496

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Re: HELP, Challenger hood clearance question?
« Reply #10 on: September 20, 2013 - 12:24:52 AM »
cudabob496, let me get this correct. From the  bottom of the intake runner to the top of the inside of the hood is 10.25 + 1.00 + 4/10= 11.65 inches, is that correct?  You do have a RT, power bulge hood? Just want to make sure you do have a RB big block? Who was the manufacture of your fiberglass hood? That is 11.65-10.25= 1.4 inches. If this is roughly correct that would be about 1.4 inches of clearance for what I have planned. How much room would be the minumum clearence? Would the torquing of the motor, present a problem. I am alredy going  to install interlocking motor mounts and torque straps on each side. What do you think?


Its a Cuda fiberglass hood.
Yes, your total is correct.
Yes, 440, stroked to 496.
I have a Shumacher torque strap, so the engine, though it has about 600 ft-lb torque, barely moves at all,
so the 4/10 clearance I have is adequate.
Recommend normal motor mounts, with the torque strap.
The interlocking mounts have failed at times, and guys have torn up their cars.
bought hood 12 years ago.  "Unlimited" something I think?
Anything fiberglass will not have the brackets underneath, that the stock hood has, I would think, and you save 60 lbs!

http://www.classicmoparforum.com/schumacher-torque-strap/
« Last Edit: September 20, 2013 - 12:28:36 AM by cudabob496 »
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

2011 Kawasaki Z1000