edelbrock rpm II or GT40 intake on modded 302??HELP!!!

91notch5.0

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warren mi

Aug 8, 2008

#1

• Aug 8, 2008

• #1

i have been told that my tubular gt40 is holding me back from making the power i should. i just got a rpm II but i am hesitant to change. should i change??

car currently has 280hp and 325tq at the wheels which seems odd to me.

 

S

seijirou

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Aug 15, 2002

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Aug 8, 2008

#2

• Aug 8, 2008

• #2

91notch5.0 said:

i have been told that my tubular gt40 is holding me back from making the power i should. i just got a rpm II but i am hesitant to change. should i change??

car currently has 280hp and 325tq at the wheels which seems odd to me.

Click to expand...

Really depends on what your dyno map looks like.

Can you post it up?

 

91notch5.0

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warren mi

Aug 10, 2008

#3

• Aug 10, 2008

• #3

max power at 5300 if that helps

 

V

v8only

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Jul 3, 2003

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Aug 10, 2008

#4

• Aug 10, 2008

• #4

port out the gt40 lower and you'll be perfect. that rpm 2 intake is too much for those heads.

 

S

seijirou

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Aug 10, 2008

#5

• Aug 10, 2008

• #5

I don't think it's your intake holding you back, but, your numbers are about what I'd expect with that combo. You've got 300 or a little more horse at the crank. What do you think you should see?

I agree porting the gt40 lower would help. I don't think the rpm intake would hurt your numbers, and it might help a little bit, but you'd suffer some on the bottom end and hurt streetability. It's not all about the big number, you want a nice high average hp over the length of your gears.

 

B

blubullett

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Jun 22, 2006

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Aug 10, 2008

#6

• Aug 10, 2008

• #6

I would put it on, especially if it is the black version!!

 

91notch5.0

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warren mi

Aug 10, 2008

#7

• Aug 10, 2008

• #7

i expected 300hp and 300tq at the tires. 280hp and 325tq just seems just wrong to me. i definitely don't want to lose tq.......i just think 20 more hp wouldn't hurt.

with the 15% rule i make 322 hp and 374tq at the flywheel.

i may be chasing the #. the car is super fun, i just want to make the most of my combo and reach my goal of 12.5 with a n/a 302. driving better wouldn't hurt though either!

THANKS GUYS........................................

 

ninety15.0

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Mar 10, 2004

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Aug 10, 2008

#8

• Aug 10, 2008

• #8

I agree that porting the gt lower would give you better all around street results. But throwing that RPM II on there would most definitely drop your ET's. Like the others have said, the RPM II will cost you some noticeable low end tq, but you will probably pick up 15rwhp on the top end.

 

V

v8only

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Jul 3, 2003

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Aug 10, 2008

#9

• Aug 10, 2008

• #9

lol, dude you're running stock heads!! Ported or not, those are some badass numbers.

my buddy runs afr 165's through FULL SMOG, with a custom cam and a heavily ported explorer intake, and pegs around 280 at the wheels.

be very, very happy with those numbers

 

2000xp8

SN Certified Technician

Aug 8, 2003

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NJ

Aug 10, 2008

#10

• Aug 10, 2008

• #10

The rpm II is probably the wrong intake for your setup. Its good for supercharged and strokers, not mild h/c/i setups.

It may make you a couple horses up top, but in all likelyhood you will lose average hp with it.

Stick with the gt40, or maybe the rpm intake.

You want a few more ponies, get a bigger/better mass air meter.

 

B

blubullett

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Jun 22, 2006

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Modesto, CA

Aug 11, 2008

#11

• Aug 11, 2008

• #11

You dont want to waste money on another street intake if you wont be able to grow into it. If you ever plan on getting a stroker the rpm2 would be perfict.

 

NIKwoaC

中國製造

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Oct 31, 2006

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Aug 11, 2008

#12

• Aug 11, 2008

• #12

I've seen a dyno comparison on a RPM II and it was almost too much intake for a 347. I wouldn't say your 302 really needs it, but if you want a screamer, its a damn good intake.

Edit: 306.

 

91notch5.0

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warren mi

Aug 11, 2008

#13

• Aug 11, 2008

• #13

i also have a 75mm pro m mass air meter i am going to try.............

i guess you guys can see why its a tough choice. i just got the rpm II and the gt40 is running excellent so yes, very tough.

 

dcurtis

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Jan 19, 2006

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Aug 12, 2008

#14

• Aug 12, 2008

• #14

Just anouther RPM II is too much

 

thumper460

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Aug 12, 2008

#15

• Aug 12, 2008

• #15

And while you are pulling the GT40 intake and gasket matching it... if you advance that TFS1 camshaft.. you will gain more torque and HP!! You would be amazed on a 4* advance and the increases... just a thought!!

Just me........................

Thumper