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Old 02-07-2001, 01:59 AM   #1
RMK
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Engine: modded LB9
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How much horsepower will RAM AIR give me???

I'm just wondering how much of a power increase you get from having RAM AIR. I'm doing it to my IROC and was wondering what sort of increase I'll get. Also, how much does it affect torque?

Thanks

Rob

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1987 IROC-Z Auto (LB9)
Black/grey with the stance of a streetfighter

Mods
Custom exhaust. 4 Inch pipe from the headders all the way back to a single muffler at the rear. No Cat.

Future mods:
K&Ns
RAM Air
New Underdrive pulleys-either March performance pulleys or Auto Specialties Performance
Air foil
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Old 02-07-2001, 06:15 AM   #2
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I have got 27rwhp from my old ram air setup. To get anything near that number it must be very well sealed, and your trap speed would have to be at least 110 MPH. A sealed system starts adding significant pressure at approx 60mph. Torque would depend on how your car is geared, because that determines your engine RPM at speeds where the ram-air does it's thing.

good luck
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Old 02-07-2001, 06:22 AM   #3
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Quote:
<font face="Verdana, Arial" size="2">Originally posted by RMK:
I'm just wondering how much of a power increase you get from having RAM AIR. I'm doing it to my IROC and was wondering what sort of increase I'll get. Also, how much does it affect torque?
Thanks
Rob
</font>
Fully optimized, I never found any HP in Ram Air. If too rich, then yes, it would help.
I'd be more inclined to go with a cowl induction set up.


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Old 02-07-2001, 09:21 AM   #4
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I don't think you will gain too much, it will help most at high speeds, where a lot of air is being drawn in, a cold air set up on the other hand would work all the time, because it isn't relying on the air being forced through. You may notice a little difference with the ram air, but I don't think much, at least not at low speeds, the car may pull harder at higher speeds though.
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Old 02-07-2001, 12:36 PM   #5
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Grumpy,
Just curious, were your tests on an EFI or carbureted engine?
To clarify, the data I posted was from carbureted, and I was already at the lean limit before the ramair. The carburetor did pretty good at metering in more fuel itsself until around the 800 ft mark for me when I would get a small lean misfire. Still with the misfire it made the gains I posted.
The system I was using was far from optimal and was from White-Racing. Mr White advertises in the back of some magazines like CarCraft, and he has tons of good test data on his own and customers cars.

again good luck with that project.

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Old 02-07-2001, 02:47 PM   #6
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i picked up 2 tenths with my ramair

------------------
1992 camaro RS
195cc AFR heads with compition port work milled to 58cc
373 10 bolt rearend
ssm sfc's
87 350 TPI
bored 30 over
compucam 2032 with 1.65 full roller rockers
497-510 LIFT 214-220 duration
msd6AL
1 5/8 headman headers
2 `1/2 flowmaster exuast
k&n filters gutter air box gutted maf
3 pc under drive pulleys
no emissions no egr etc
custom ED Wright chip
eddelbroc intake base and runners ported plenum
Taylor 8mm wires
B&M mega shifter
gutted maf/airbox
hotchkis lower control arms
3" exhuast cutout
homemade cold air intake
2000 tci stall
700R4 with B&M shift kit edelbrock water pump
new best ET 13.5 @104.66
no times with new afr heads hopeing for 12's
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Old 02-07-2001, 05:30 PM   #7
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I also picked up two tenths with a very primitive ram air.

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92 Z28 L98 350
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Ported stock heads, XR270HR-10 cam, TES headers, Crane AFPR, Flowmaster catback, MSD ignition components, #24 SVO injectors, 1LE aluminum driveshaft.
Best ET 13.3@107 mph

Click here to see my car at Truspeed.org
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Old 02-07-2001, 05:30 PM
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