Hi guys, i have a ? for you, i ordered the rpm airgap for my 318, they sent me the standard rpm instead. I was just if they is a big difference in horsepower between the two intakes? I was just wondering if i should send it back, or not be bothered with the hassle and just keep it, the intake and my heads are port matched. Is there a big difference? should i keep it or send it back for the air gap, thanks for helping me make up my mind Newathis
Rpm vs Rpm airgap
- Thread starter NEWATTHIS
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1968FormulaS340
Well-Known Member
If you have touched the ports on the intake you can't send it back.
Where do you live?
Edit.
If you drive in a cold climate keep the RPM.
If you only drive in warm weather go for the Air Gap.
But really…. It probably doesn't matter both are a little more than you need on the average 318.
Where do you live?
Edit.
If you drive in a cold climate keep the RPM.
If you only drive in warm weather go for the Air Gap.
But really…. It probably doesn't matter both are a little more than you need on the average 318.
The jntake came in today, i live in Regina Saskatchewan Canada, the intake was ordered in the U.S.A , what do you mean by touched ports? thanks for the help
1968FormulaS340
Well-Known Member
You mentioned port matching. If you did anything to the ports on the intake you can't send it back.
The intake needs to be how it was when it came out of the box.
Seeing that you are in Canada I would just use the normal RPM.
The intake needs to be how it was when it came out of the box.
Seeing that you are in Canada I would just use the normal RPM.
Sorry, i should have mentioned that i have my 318 heads worked on at the machine shop, they were milled to raise cthe compression up a bit and the ports were opened up to 340 sze or very close to it with 188, 160 valves
T67POWER
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Use it \\\\\\\\\ perfect for a 318ci motor.
Get a four hole spacer for the intake \\\\
Make sure you have enogh hood clearance.
Use a one inch spacer if you can but if not use a 3/4 or 1/2 inch.
It will be smoother at idle and a better running motor over all.8)
Get a four hole spacer for the intake \\\\
Make sure you have enogh hood clearance.
Use a one inch spacer if you can but if not use a 3/4 or 1/2 inch.
It will be smoother at idle and a better running motor over all.8)
T67POWER, i never though about using a spacer? does a spacer add horsepower? and does it help with keeping the gas cooler, which the rpm airgap was meant to do.
T67POWER
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yes a plastic or wood spacer will keep your carb cooler ,and also keep the velocity of the air and gas charge moving at a faster speed while going into your motor,filling the cylinders with more air and gas.
This gives you more torque and horse power for any motor.
This gives you more torque and horse power for any motor.
Thanks , i will get a spacer never ran one before, but now is the time.
LXguy
Well-Known Member
Watch for hood clearance with the spacer. That Eddy intake is kind of a tall bugger.
There's a fairly significant price gap between the RPM and Air Gap. If you're going to keep the RPM, you should get a refund for the difference.
Cold starts are better with the RPM over the air gap also.
Steve
There's a fairly significant price gap between the RPM and Air Gap. If you're going to keep the RPM, you should get a refund for the difference.
Cold starts are better with the RPM over the air gap also.
Steve
Claudius
Well-Known Member
A FABO member suggested the Proform 66808 drop base (-2-1/4") to me to address potential hood clearance issues and it generically fits all 5-1/8" carbs. It costs an additional $31 USD, plus getting it across the border. As LXguy said, if there is a cost difference between what you ordered and what you got with the intake, demand a refund. Mistakes do happen and suppliers should honour the contract made when you placed the order. Just take a picture to send to the supplier and they will probably be more than accommodating.
AdamR
Big Member
Other then the actual "air gap" they are the same intake, Same ports, Same plenum. Big price difference I believe though.
ir3333
Well-Known Member
read the tuning guide on innovates web sight for carbureted engines.
you need heat under the carb to atomize and mix the raw gas or you will have to really
enrichen your carb to avoid a lean condition due to manifold wetting.
unless you are an all out racer stay away from the airgap style.
you need heat under the carb to atomize and mix the raw gas or you will have to really
enrichen your carb to avoid a lean condition due to manifold wetting.
unless you are an all out racer stay away from the airgap style.
............What camshaft r u running...........the RPM is more intake than u can use on a street 318...........kim........
mopardude318
Well-Known Member
price difference is only about 30 bucks, but still get the difference back...keep the performer rpm.....youll be just fine with it.....however, the air gap isnt an "all out" race manifold...an all out race manifold is like a super victor, or a tunnel ram or some $h!t.....
Please, please, talk about "Miss information" being dumped by you... please, come on now....
I agree here. A lot depends on the build and a good combo of these parts. Mild camshafts need not apply.
Old thread raised from the dead. 
Think of all those mis-manifolded SB running around dressed up as street cars. ;)
I guess every BB mopar is a race car by design.
Think of all those mis-manifolded SB running around dressed up as street cars. ;)
I guess every BB mopar is a race car by design.
mopardude318
Well-Known Member
holy crap. it is an old thread!! didnt even notice. LOL....lotta newbies tend to do that...
ir3333
Well-Known Member
...wow you have to be careful on this sight.
of course an all out racing engine won't be running an airgap.
my point suggested the cars primary use...
of course an all out racing engine won't be running an airgap.
my point suggested the cars primary use...
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