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UPDATE intake manifold recomendation

Posted By: ngpSatellite

UPDATE intake manifold recomendation - 03/31/10 05:47 PM

Have a stock RR HP 383 all stock engine and want to ditch my iron DP manifold but not sure what to get?? DP or SP aluminum manifold ... could someone possibly explain the dif between the 2 and what would be the best for a 69 383 (std bore flat top HP pistons W/ 3.23 rear) no racing , just cruizing the coast line
Posted By: Neil

Re: intake manifold recomendation - 03/31/10 05:50 PM

Get the dual plane.
Posted By: eightlitermopar

Re: intake manifold recomendation - 03/31/10 05:55 PM

Dual plane all the way. I made the same mistake almost 10 years ago.

Roadrunner, mild (emphasis on mild) 440 with a torque cam. Cast iron intake, exhaust manifolds, and a holley dp carb.

I switched to a 750 edlebrock (sold the holley) and when to a Mopar M1 single plane high rise manifold.

It never ran the same again. No low end torque, killed drivability. My embarassing 15 second quarter mile decreased to an even more embarassing 17. It was quite a learning experience. Go with a dual plane.

eight
Posted By: ngpSatellite

Re: intake manifold recomendation - 03/31/10 06:00 PM

thanks ....I was just about to pull the trigger on a SP what make and model is the best aluminum DP...
Posted By: Neil

Re: intake manifold recomendation - 03/31/10 06:05 PM

Get an edlebrock performer or performer rpm intake.
Posted By: StealthWedge67

Re: intake manifold recomendation - 03/31/10 06:07 PM

I think I can say that pretty much without question: The Edelbrock Performer RPM is going to be your best option. Its a high-rise dual plane that works real good on stock to mild street / strip motors. Only issue might be hood clearance (???).
Posted By: ngpSatellite

Re: intake manifold recomendation - 03/31/10 06:08 PM

Thanks Gents!!
Posted By: eightlitermopar

Re: intake manifold recomendation - 03/31/10 06:08 PM

Some basic aftermarket dual plane manifolds are basically the same as your cast iron intake, only lighter aluminum.

Edelbrock performer or performer RPM (this sits slightly higher than stock) would be my vote for a stock motor.

Or just my , since there won't much be a noticeable difference. Just put a 4 hole spacer between your iron intake and the carb for some added throttle response and some power gain?

anyway you go, good luck. SP would be a step in the wrong direcetion though.

eight
Posted By: Anonymous

Re: intake manifold recomendation - 03/31/10 06:22 PM

the single plane Holley Street Dominator was the BEST dual plane intake ever made
Posted By: DaytonaTurbo

Re: intake manifold recomendation - 03/31/10 07:10 PM

Look on ebay and the classifieds here for a used edelbrock DP4B intake. For stock heads it's all the flow you need. You won't gain anything except less hood clearance if you go with the performer rpm over the dp4b.

Quote:

the single plane Holley Street Dominator was the BEST dual plane intake ever made



The holley SD is a good intake, but not for a stock 383 with 3.23 gears.
Posted By: Anonymous

Re: intake manifold recomendation - 03/31/10 07:28 PM

Quote:

Look on ebay and the classifieds here for a used edelbrock DP4B intake. For stock heads it's all the flow you need. You won't gain anything except less hood clearance if you go with the performer rpm over the dp4b.

Quote:

the single plane Holley Street Dominator was the BEST dual plane intake ever made



The holley SD is a good intake, but not for a stock 383 with 3.23 gears.


whatever you say..
Posted By: StealthWedge67

Re: intake manifold recomendation - 03/31/10 08:42 PM

Quote:

Look on ebay and the classifieds here for a used edelbrock DP4B intake. For stock heads it's all the flow you need. You won't gain anything except less hood clearance if you go with the performer rpm over the dp4b.



Agreed, but we have all been through this, haven't we??? First its an intake. Next He'll look to buy a Holley carb. Then he might as well add headers. Hey, next let's take a stab at a Cam-swap. Then, how about some deeper gears.... I can't be the only one that's been through this!

So with that in mind, The RPM is an intake that will support his desires all the way up to and including an 11-second stroker motor. Since it also works well on stock-ish motors, might as well go straight there, now.
Posted By: Dougsmopars

Re: intake manifold recomendation - 03/31/10 09:03 PM

The RPM will make a little more power then the performer but check your hood clearence first. Unless your going to cut the hood for a scoop anyways then it doesn't matter.
Posted By: BeEtLeJuIcE !

Re: intake manifold recomendation - 03/31/10 09:04 PM

NO racing ? .. just cruizin' ??

Get an old-school Eddy Streetmaster. Decent performance and good MPG. To get BESTer MPG ...add a TQ carb.
Posted By: ngpSatellite

Re: intake manifold recomendation - 04/01/10 05:13 PM

the main reason I'm switching manifolds is that I still have alittle bit of a restart issue when I turn off the engine (gas station for example) and it is hard to restart (alittle embarrassing for a mopar guy )so I was thinking an aluminum manifold would conduct less heat to the carb... when I'm shutting the car off the temp is around 170 to 190 max so the car is not running hot.... I also have a spacer (1/2.. 4 hole phenalic)on it now. (edel 750)
Posted By: stumpy

Re: intake manifold recomendation - 04/01/10 05:19 PM

What makes you think it's a heat related problem?
Posted By: MoparforLife

Re: intake manifold recomendation - 04/01/10 05:22 PM

Warm engine try holding the gas pedal to the floor right away when you start to turn the engine over. Lots of times helps for quicker starting by unloading any loaded up gas accumulation.
Posted By: DaytonaTurbo

Re: intake manifold recomendation - 04/01/10 05:22 PM

Quote:

Quote:

Look on ebay and the classifieds here for a used edelbrock DP4B intake. For stock heads it's all the flow you need. You won't gain anything except less hood clearance if you go with the performer rpm over the dp4b.



Agreed, but we have all been through this, haven't we??? First its an intake. Next He'll look to buy a Holley carb. Then he might as well add headers. Hey, next let's take a stab at a Cam-swap. Then, how about some deeper gears.... I can't be the only one that's been through this!

So with that in mind, The RPM is an intake that will support his desires all the way up to and including an 11-second stroker motor. Since it also works well on stock-ish motors, might as well go straight there, now.



True, however for as long as he's running bone stock heads, he will never see a noticable increase in power with the rpm over the dp4b. Heads are the bottle neck at that point. The 383 intake shootout hot rod mag did showed exactly that, I think the dp4b even put out a few more ft-lbs(and at a lower rpm) than the rpm when tested on a stock headed 383 with a decent cam. I think the rpm was good for 5hp or something insignificantly like that. I suggest the dp4b because he can bolt it on and go, no issues with needing drop base air cleaners is a plus.
Posted By: ngpSatellite

Re: intake manifold recomendation - 04/01/10 07:34 PM

Quote:

What makes you think it's a heat related problem?


when I start it cold it starts up fine and when I have a quick stop to make (10 min or so) the engine seems to take alot of cranking to start back up....(eng temp seems alittle high, plus enging compartment feels hot) and alot of the times I'll open the hood and take off the air filter to get it to resart because I don't want to wind down the battery
Posted By: Dougsmopars

Re: intake manifold recomendation - 04/01/10 08:42 PM

Sounds like an over heat problem to me. Lose the phelic spacer. Get the eddy thermal spacer. It's abut a 1/2 to a 1/2 inch thick. It's an insulator gasket.Also check your water flow. Excessive engine compartment heat soiunds like steam pockets in the heads.
Posted By: RapidRobert

Re: intake manifold recomendation - 04/01/10 08:42 PM

No need to ch manifolds. Lets see if we can solve it as is. heat riser sending heat up top?. Need a thin gasket on either side of the 1/2 black plastic phenolic spacer? E10 gas (ethanol) by chance. the eddy 750 may have an issue . Something besides the cast iron is causing the prob & if it is not heat related check for a good blue spark when hot
Posted By: ngpSatellite

Re: intake manifold recomendation - 04/01/10 10:44 PM

Quote:

No need to ch manifolds. Lets see if we can solve it as is. heat riser sending heat up top?. Need a thin gasket on either side of the 1/2 black plastic phenolic spacer? E10 gas (ethanol) by chance. the eddy 750 may have an issue . Something besides the cast iron is causing the prob & if it is not heat related check for a good blue spark when hot

"E10 gas (ethanol) by chance"
... YES... every grade has 10% ethanol around here.......... I remember the days you could get leaded regular gas would that be the issue........... besides the restart the motor has been running great........
Posted By: RapidRobert

Re: intake manifold recomendation - 04/02/10 12:21 AM

When E10 became an option at the pumps here in Nebraska in the early 80's it caused quite a bit of vapor locking and stalling at stoplights in the summertime but then later w the intro of fuel injection and carbs becoming nearly extinct it became a non issue. Some eng setups are much more susceptible than others and the ones that are it is severe and a real pain. Any way you could get the E10 all the way out & toss in several gallons of non alcohol fuel of some kind (maybe some racing gas ) to confirm or deny that that is the prob. Changing the intake is not the solution imnho
Posted By: BeEtLeJuIcE !

Re: intake manifold recomendation - 04/02/10 12:31 AM

Putting an alum intake on (and in Florida) blocking the heat-crossover) will help big-time.
Posted By: Chilort

Re: intake manifold recomendation - 04/02/10 01:35 AM

Eddy Performer RPM.

I love mine!
Posted By: ngpSatellite

Re: intake manifold recomendation - 04/02/10 01:54 AM

I think i'm going to swap out the manifold and look for a place that sells decent gas........ the vapor lock theory sounds familiar... i used to live in Tucson AZ and had a stock 67 383hp and drove it for about 3 yrs(before I wrecked it ) and I honestly opened the hood about a dozen times (too interested in the girls back then ).... they had regular leaded pump gas at every station and NEVER had a heating issue.
Posted By: RapidRobert

Re: intake manifold recomendation - 04/02/10 02:53 AM

Holler w what ends up taking care of it
Posted By: 451Mopar

Re: intake manifold recomendation - 04/02/10 05:55 AM

I would use the Edelbrock Performer RPM dual plane intake. The RPM intake blocks off the exhaust crossover so it should not get as hot as the intakes that use the exhaust crossover. Also, make sure the heat valve in the exhaust manifold is not sticking closed. That would cause you exhaust to flow through the intake crossover and out the drivers exhaust making the intake really hot.
Posted By: ngpSatellite

UPDATE boiling gas in fuel filter - 04/17/10 12:42 AM

Quote:

Holler w what ends up taking care of it

took the ride for a quick cruz (15 min) and parked in the garage ... opened the hood and noticed the gas boiling in the fuel filter (clear plastic filter).Filter is placed a approx 2 in above valve cover touching nothing . Temp during the ride was around 180.... so what is a good fuel line to buy to keep the heat out of the fuel line?? braided hose??
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