Re: Tips for RPM intake on driver
[Re: mark7171]
#498756
10/16/09 10:20 PM
10/16/09 10:20 PM
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Joined: Feb 2006
Posts: 1,949
land of 10,000______'s
BDS871Cuda
top fuel
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top fuel
Joined: Feb 2006
Posts: 1,949
land of 10,000______'s
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Quote:
Using new transportation, it has a RPM intake and 600 holley. No acceleration power, but does make idle vacuum. Will ride rough.
stock 360 with RPM intake, and 1" 4 hole spacer
600cfm VS holley
Summit Headers
3.55 gear
HEi, 12 inital 34 total, 10 in vac can
Passed CLT and compression test. No easy valve stem leaks.
Has to be manifold, no?
First thing, dump the 4 hole spacer and see how
that works. Next you might have to dump the RPM
intake and run the standard Performer intake.
Do you know if the cam is bone stock or not?
If you want to keep the RPM intake, then I would
put in a cam to match it. Might need a 2000-2200 or
better stall converter.
Snap your neck, mega G-force launch, is all I want!
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Re: Tips for RPM intake on driver
[Re: mark7171]
#498757
10/19/09 09:32 AM
10/19/09 09:32 AM
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Joined: Jan 2003
Posts: 642
New Jersey
Craig
mopar
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mopar
Joined: Jan 2003
Posts: 642
New Jersey
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Jets? What do the plugs look like?
67 Dart, 426 Hemi, 9.23/145mph, 3400lbs, footbraked, owned since 1982
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Re: Tips for RPM intake on driver
[Re: Craig]
#498759
10/19/09 09:51 AM
10/19/09 09:51 AM
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Joined: Jan 2003
Posts: 5,444
Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,444
Indiana
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If you want to keep the 1" spacer, keep tuning the carb. What jets, squirter and pump cam do you have in it now? What are the plugs telling you?
The RPM and the 1" spacer are added plenum volume which means you may need more fuel than before these items were added.
1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
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Re: Tips for RPM intake on driver
[Re: YO7_A66]
#498760
10/19/09 08:07 PM
10/19/09 08:07 PM
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Joined: Apr 2007
Posts: 1,261
ILL
mark7171
OP
pro stock
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OP
pro stock
Joined: Apr 2007
Posts: 1,261
ILL
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Jets are #66 primary and the 600's sec plate. Set the underside secondary plate screw. 6.5 PV, Purple spring, accel coil 40k, and 7mm wires. Timming, and the curve is not the problem.
Tip Top engine, stock 360, 198o's cam and heads.
My understanding, a 360 cam is .410" lift, maybe?
Plugs are dark/carboned up and flaked. no oil.
I'm getting a bunch of gaskets, to swap a freind's Performer intake w/ 500cfm4 edelbrock topend, and try. The RPM intake is the culprit, maybe?
That intake is more for racing. Can the RPM be adpated for driving?
mill a 1/2" off the RPM intake top...no spacer...rich'n up for large air volume...idle at 1000 rpm...ideas?
YES! Hughes flows intakes!
Last edited by mark7171; 10/19/09 08:32 PM.
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Re: Tips for RPM intake on driver
[Re: gch]
#498764
10/19/09 11:44 PM
10/19/09 11:44 PM
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Joined: Jan 2006
Posts: 657
B.C.
mk_
mopar
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mopar
Joined: Jan 2006
Posts: 657
B.C.
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Quote:
The rpm intake is not the problem.
I would lose the spacer.It simply is'nt needed for you.
Make sure your power valve is in good working order.Make sure the choke is'nt staying on.
Make sure you have full throttle.
Is the vacuum secondary diaphram and spring working?
Check your float level.If all else fails try running 64 or 62 primary jets and see if it cleans up.
Your problem appears to be in the carb.Make sure it is working properly.Swap the edelbrock carb and see how it does.
Leave the intake.
 On my winter beater I have the RPM intake on a 360 with a stock .410 cam and an edelbrock 600 cfm carb, and it pulls well from idle and has good low and mid range power for a 4x4.
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Re: Tips for RPM intake on driver
[Re: mark7171]
#498766
10/20/09 07:12 AM
10/20/09 07:12 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Carb has 31 shooter,full choke release,wide open throttle,floats set up to bottom of sight threads. 4 jets sizes up or down won't do it. Engine makes idle vacuum, but disappears durring cruise fast.
A carb selected for the correct application has only so much it can do. Baseline for the carb size and application.
Basics....You basically got inital pump shot, then PV, and the created demand against secondary spring. The acceleration circuit is a balance between those and the timming curve.
If i use any position but the lightest pink multi cam, it bogs (even with more timming).
31's are tooooo big. drop down to 28's as for jets I'd run 70's-74's and go from there.
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Re: Tips for RPM intake on driver
[Re: BDS871Cuda]
#498768
10/20/09 11:47 AM
10/20/09 11:47 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
Using new transportation, it has a RPM intake and 600 holley. No acceleration power, but does make idle vacuum. Will ride rough.
stock 360 with RPM intake, and 1" 4 hole spacer
600cfm VS holley
Summit Headers
3.55 gear
HEi, 12 inital 34 total, 10 in vac can
Passed CLT and compression test. No easy valve stem leaks.
Has to be manifold, no?
First thing, dump the 4 hole spacer and see how
that works. Next you might have to dump the RPM
intake and run the standard Performer intake.
Do you know if the cam is bone stock or not?
If you want to keep the RPM intake, then I would
put in a cam to match it. Might need a 2000-2200 or
better stall converter.
it's not the intake unless you have some vaccuum leaks or something. I ran an RPM air gap year round on my old 360 (stock long block, comp XE262, headers) no problem. I'm running it now on my new 318 (9:1 comp, magnum heads, 208@.050 roller cam) and it pulls hard from idle on up.
both used an edelbrock 1406 carb. I'd focus on vaccuum leaks, or improper carb tuning.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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