shix

I dynod my car with the air box on and made 250 at the wheels and then without the airbox i made 278 at the wheels. just a fun little tid bit of info

IronOutlaw

iTrader: (4)

Wow, what all is done to it. I really dont think a stock car would benefit that much.

WS Sick

The stock airbox and hard piece over the radiator is a major restriction. The difference between the Cam/ FB motor and the Corvette is negligeble, its the intake system and exhaust system that make the difference in te rating between the two, But that difference you observed is quite surprising.

shix

no idea whats done to my car. 1994 z28 bought it with 203xxx miles on it just for a daily drive. I was shocked at the difference in horsepower

Puck

iTrader: (17)

How many miles were on your air filter?

ElkySS

iTrader: (6)

u seriously just asked that?

myltwon

iTrader: (1)

well if the thing is packed with dirt, bugs, etc....

WS Sick

Or an oppossum

Puck

iTrader: (17)

Of course I did.

The only way to get 30rwhp from removing an airbox is if the filter being used was terribly dirty.

You don't think the actual airbox was costing 30rwhp did you? .

leadfoot4

iTrader: (1)

One other thing to consider...The stock air box has an opening to correspond to the air ducting that's hidden somewhare in the LF fender. That opening just happens to be only about half the size of the actual air filter.

I opened mine up so it's fully exposed to the filter, then epoxied a piece of wire screen over the opening, to keep any large pieces of debris from clogging the filter. Yes, that will allow some warmer, underhood ait to enter the filter, but there's still cool air coming in from the stock inlet.

shix

i had a newer filter in it and we cleaned it after the first run to see if it made a difference. it didnt. i want to see the benifits of an entire cold air intake system over our stock air inlet system.

shix

I would like to get a stock lt1 car and test all the free mods that everyone does and put up a list of results. (free dyno access while im at school so i may as well put it to good use)

05HD

I did a similar test when I had my car on the dyno a while ago, except I shitcanned the whole intake system and ran open throttle body (I have a speed density 93). It made 13 more hp than with the complete factory system in place.

I think there was some error with your testing shix.

Puck

iTrader: (17)

FWIW Pulling my K&N FIPK gave me 2.4hp on the dyno over an open 1LE elbow with my H/C setup Some of that I'm sure was from the filter having ~3k daily driven miles on it. I would call it "zero restriction" for a stockish LT1.

This is why i don't personally think the LS1 lid swap is worth too much on a stock cube car unless you add a true ram air setup to it like the chris1313 kit. Most CAIs already flow way more then enough air for even a H/C350...

But thats a whole other beaten to death argument.

355z28

iTrader: (8)

lol here's what a hotcam 355 did to a 2000 mile fram filter.







I think it wanted more air

FNSlow

iTrader: (4)

The intake added 20 hp and the fresh turn signal fluid added 10

shix

it was without the air box completely not just a new filter. You guys don't have to believe it if you don't want but i did multiple pulls just to rule out any possibility of errors.

96lt1m6

iTrader: (31)

It is entirely possible..... Do you honestly thing the factory will spend the time and money on R&D for a cold air system? You would be nuts to entertain that thought! They simply place plastic tubing routing away from the motor.......Now specialty cars like the WS6 have the best most direct hard to improve on set up going! The SS set up was NOT although it looks cool.....
I had a modded air box, K&N, Homemade, Moroso and now as of 3 years ago SLP lid it was proven to me at the track in my car to give 2 tenths and 1.8 mph OVER the Moroso and by far the least expensive!

WS Sick

Well that does make quite a difference, the stock box itself is a restriction.

I know when my 93 was stock for giggles we pulled the stock airfilter out of the box and left it open at the track for a pass and it gained 1.8 in the 1/4 and ran a mph faster than the previous run the same day.

05HD

OEMs do TONS of r&d on EVERYTHING. They just have slightly different goals than the average joe.

1. Avoid water ingestion
2. Silence intake noise
3. Ensure air is clean of any debris
4. get air into engine

Modding your car is all about making your car conform to your priorities. You will never do as much r&d as an OEM but you can set your priorities however you like.