How to install a intake on my 318

[74 DART SWINGER]

I need help on how to install a intake on my '74 318 w/ a/c and stuff like that. I have edelbrock perf intake for now. Today I measured some other 318 heads I have layin around in the shop and the intake has about .70 thousansths wider ports then the heads. I guess it would be the same on the car right now that has the heads. Would it matter if it is bigger then the heads? How much hp would I get if the car has a 155hp then add the edel intake and a thermoquad carb? How long would it take to install an intake and carb for a noobie w/ 2 helpers? thanks all!

[powerdodge]

HI!
it's hard for me to explain the prosedure for you(I'm not that good in writing english)

it's not a good thing to think about horsepower all the time! if your car has 155hp now, after 30years of driving! it's fantastic! but (correct me if wrong) my '83 318 has (stock) 150hp with 2bbl and 170hp with 4bbl.

I think the edel intake is a good one for the 318! mostly because of the saved weight! (if you run the stock cast-iron now)

I think you could feel the extra power you get when/if you change intake and carb.

it will take maybe 4,5hours for you? I don't know? it's not that hard! unbolt all, and replace with the new parts!

maybe you could ask a friend who knows a little bit, because you can get some trouble with adjusting the carb...


good luck!

[rumblefish360]

I have noticed that your very hung up on the "New HP level' the engine will have. Stop the worry and go enjoy.

How to install an intake is a basic thing of taking it off and doing the same in reverse to install it.

Start your advanture today by getting gresse in your nails without instuctions.
If you have fear of not knowing where it goes when it goes back on, do what we did, get a book and read it and get a Poloroid camera and take a few snap shots to look at when it goes back together.

How to rebuild my small block MoPar and how to hot rod my small block MoPar along with a factory service manual are great books that NEED to be on your shelf.

The offset on the intake to port is not a big deal. To rid yourself of it, purchase an air grinder and bits. Mark the area with an awl using a gasket as a guide and grind away.

[Dartcustom]

How much hp would I get if the car has a 155hp then add the edel intake and a thermoquad carb?

I'll go out on a limb and say it will add about 300 HP.

[RogerH]

Its not specific to a 318, but here's general intake removal and installation info.

http://www.edelbrock.com/automotive/...ral_instr.html

[dwc43]

Originally posted by 74 DART SWINGER
I need help on how to install a intake on my '74 318 w/ a/c and stuff like that. I have edelbrock perf intake for now. Today I measured some other 318 heads I have layin around in the shop and the intake has about .70 thousansths wider ports then the heads. I guess it would be the same on the car right now that has the heads. Would it matter if it is bigger then the heads? How much hp would I get if the car has a 155hp then add the edel intake and a thermoquad carb? How long would it take to install an intake and carb for a noobie w/ 2 helpers? thanks all!

It might add 20 to 30 hp. Pull both your valve covers. They hang over the intake. Pull any bolts that holds the a/c unit to the wated pump and the one that might be behind the compressor that holds it to the intake. Pull your fuel line off. Remove and toss any vacuum lines too.If your carefull you can remove all the bolts and get the intake off without pulling the dist. out. Clean all the gasket surfaces and set your new gaskets on the heads. Then rtv the the cork end gaskets in place and put a healthy bead of rtv along the gap where the cork end gaskets meet the gaskets that are laying on the head. Put your intake on and insert bolts and your done pretty much.

[dartswinger74]

you will need a new fuel line and you willl have to modify the kickdown and throttle linkage. Buy some 5/16 steel line at the parts store and whip up a fuel line. for the linkage it can be easy or a real pain in some cases. Just take your time and youll figure it out.

[dwc43]

The stock linkage should work fine in most all cases. Just cut the end off your fuel line and straighten it out. Put your filter on the end and a small rubber line to the carb inlet at the rear is all you need. No need to go buy a bunch of extra junk.

[74 DART SWINGER]

Thanks all! Ill try to see if we can do that, sometime when I have a break from school. What size of thermo would I get?

[MoparMarcIdaho]

might want to use some high tack on the bottoms of the end gaskets to keep them from shifting out of place when you torque it down.Or you can do away with them all together and run a bead of RTV silicone down each end and be sure to let it cure overnite before you fire it up.

[dwc43]

Originally posted by 74 DART SWINGER
Thanks all! Ill try to see if we can do that, sometime when I have a break from school. What size of thermo would I get?

The small block Tq is 800 cfm and that's all you need. We only use the big block carb on our race cars.

[23T]

Originally posted by 74 DART SWINGER
I need help on how to install a intake on my '74 318 w/ a/c and stuff like that. I have edelbrock perf intake for now. Today I measured some other 318 heads I have layin around in the shop and the intake has about .70 thousansths wider ports then the heads. I guess it would be the same on the car right now that has the heads. Would it matter if it is bigger then the heads? How much hp would I get if the car has a 155hp then add the edel intake and a thermoquad carb? How long would it take to install an intake and carb for a noobie w/ 2 helpers? thanks all!

The w/2 helpers may or may not help sign in my shop Shop time $45.00 hr, if you watch $50.00 hr, if you watch and ask questions $75.00 hr, if you help $100.00 hr

[74 DART SWINGER]

I think im going to change it this weekend. I got a 625cfm holley carb that im going to use. It has the Huge secondaries/small primaries. Are Fel-Pro gaskets good? Are you sure the kickdown linkage will work stock and throttle linkage? Do they sell that stuff at auto-zone or anywhere else? thanks

[dwc43]

That holley is a sorry, way too small, replacement for the Thermoquad which is a m,uch better, more throttle responsive carb. FelPro is fine, the linkage will work in most all cases. Want find it at crap zone or Advance Auto, but you can still get them at the dealer. The only time the stock wont work is if it hits the intake runner and then all you need is the stock thermoquad 4bbl intake bracket.

[rumblefish360]

625 Holley? Hummmm.
Fel-Pro is the biggest name in the biz. I have had good luck with gasket paper on a roll, cut to fit. I have also had excellent results with cardboard in a pinch. But thats desperate times and desperate measures.

[dartswinger74]

the kickdown linkage wont work without modifying it a little. I have the same car and almost the same swap. I used a weiand and tq. Once you have the intake on you will figure out the linkage. basically you bend the bracket that bolts to the intake a little. I also made a seperate bracket to hold the throttle cable. Its easy to figure ourt once you are looking at it.

[dwc43]

I'v got sevral Weiands with Tq's and it works with no mods. The holley 625 is way too small replacement for the Tq.

[MoparMarcIdaho]

Hope you dont want any gas milage,if its a double pumper they drink it.Ever taken one off thats still got gas in it?Just hold it by the air cleaner stud and yank the throttles open.Wooosh it goes,reminds me of hitting the flush handle on a portapotty.

[23T]

[QUOTE]Originally posted by MoparMarcIdaho
Hope you dont want any gas milage,if its a double pumper they drink it.Ever taken one off thats still got gas in it?Just hold it by the air cleaner stud and yank the throttles open.Wooosh it goes,reminds me of hitting the flush handle on a portapotty. [/QUOTE

And all this time I was going after MPH per gallon

[74 DART SWINGER]

And for the fuel line, what do I do with that? where to cut or do I even need to cut.

[dwc43]

All you need to cut off is about an inch from the fitting and put your filter right there cause you will use a rubber line from that to your carb fitting.

[74 DART SWINGER]

Thanks for the replies. I have another question. Would it help if I smoothed(port) the intake ports out since they have the cast stuff kindof sticking out and it was used beforeme?

[dwc43]

No. Never polish an intake runner. IT keeps the air and fuel suspeneded together. Too much air speed with too smooth a runner will let the fuel drop out of suspension and let it puddle in the intake. There's even cast in humps in the plenum floor for the same reason.

[74 DART SWINGER]

Ok I got the carb and intake cleaned up. We went to the store and got some fuel line, gaskets, studs. Next week im hopefully going to install it. Ill let you guys know. Should I be up at 180hp?

Would 180hp+3.55gears keep up w/ my friends 2001 3.8l stang?

Thanks

[dwc43]

Get you past it and then some, easy.

[74 DART SWINGER]

I got the intake off today, WHoo-hoo! Man that cast 2 barrel intake weights a load. We cleaned out all the grumy junk out and that cam and everything has alot of miles on it. So anyway, One Big problem is that we spotted and cleaned out was the Heat Crossover was blocked hard for about 1.5" into the head of exhuast I guess. Do you guys think that thats why it was running so crappy? Now we got it all cleaned up and were getting ready to put it on, we checked the clearance and should be alright. OH YEA and were are not useing the whole A/C unit no more, we took it off. Lets see, so 4 barrel+intake=25hp, w/o A/C=10hp? am I right. Thanks all, hope to get it running this week or on the weekend.

[dwc43]

Should have left it plugged. We plug them with a speacial gasket on purpose. Cooler intake makes for a cooler carb and fuel for more power. 10 robbed from a/c sounds about right.

[MoparMarcIdaho]

having the heat passege plugged off helps the headers scavenge better.But if you plan on driving it much in the winter monthes you should keep it open.If youve ever had one ice up on you,in heavy traffic or in a blizzard,you wouldnt like it.

[74 DART SWINGER]

How much pounds do you think ill loose, a/c+cast intake=50lbs? Do you think I could make it into the low 16's with the 4 barrel?

[MoparMarcIdaho]

with the right rear gears you should get down in the 15s easy.