Cold Air Hood Mod - Page 2 - Corvette Forum : DigitalCorvettes.com Corvette Forums

MIKE80 · 02-08-2013, 08:00 AM

Quote:

Originally Posted by tektrans

I like the idea of an additional vent-I was thinking the vent on your hood is kinda tight-may not let enough air in for the motor and choke it a bit-especially on hotter days but still a great starting point and very original.

Okay, the vent opening on the hood above the radiator is 1.5" in the center, tapers to 1" to both sides and is 12" wide. I think I will mount my GoPro camera in the lower front air dam and take a video when I finish and go for a test drive.

Turbo84 · 02-08-2013, 01:22 PM

Quote:

Originally Posted by MIKE80

Thanks. Yeah, came across a pic of that hood someone modded and liked what they did. I'll probably do something like that when I do the body and paint. Maybe put the vent back a bit more for a larger opening.

Just talking out loud here, but I would consider putting some yarn tufts in that proposed intake area to see what the local area airflow looks like, and certainly a vacuum gauge/differential pressure gauge in the intake tract to see if the scoop placement and size is correct.

Keep the pictures coming.

The Punisher · 02-08-2013, 06:50 PM

Very cool , great work

MIKE80 · 02-08-2013, 07:31 PM

Quote:

Originally Posted by Turbo84

Just talking out loud here, but I would consider putting some yarn tufts in that proposed intake area to see what the local area airflow looks like, and certainly a vacuum gauge/differential pressure gauge in the intake tract to see if the scoop placement and size is correct.

Keep the pictures coming.

I'll keep that in mind. Thanks.

MIKE80 · 02-16-2013, 06:02 PM

I got a little more done this weekend. Cut the opening for the air cleaner. I need to get some resin for glassing closed the smaller clearance holes with indents for the clearance I need. A little sanding and satin black paint after that and I could put it back on, finish the radiator seal and it's done.

Here's a picture of the opening. I placed a pen in the opening to try to give a reference of the opening size, which I think should be large enough for good airflow.

Drawmain · 02-16-2013, 06:54 PM

That looks similar to what was done on the 82 hoods. Have you considered getting the air diverter (if that's what its called) from an 82 to direct air into your chamber? My apologies if that has already been covered. Nice work!

MIKE80 · 02-16-2013, 09:52 PM

Quote:

Originally Posted by Drawmain

That looks similar to what was done on the 82 hoods. Have you considered getting the air diverter (if that's what its called) from an 82 to direct air into your chamber? My apologies if that has already been covered. Nice work!

I believe the air duct that you are talking about mounts to the top of the radiator support to channel the cool air to the stock air cleaner. When the hood is closed, the panel I bonded to the hood to create the air chamber will seal to the radiator support and channel the air to the air cleaner which will also be sealed to the hood when the hood is closed. The front air dam and grills next to the parking lights will draw the air in and with the radiator sealed to the radiator support, some of the air will pass through the ac condensor/ radiator, and the rest will pass over the radiator support into the air chamber/ air cleaner. At a later time I may add a front splitter to the lower front bumper to help bring more air up into the air dam.

Drawmain · 02-16-2013, 10:51 PM

Well thought out and well implemented. I'm interested to see the results. One of the first things I did to my 82 was remove the solenoid and door assembly from the hood to allow cooler air to the intake. In the past I have considered converting to an aftermarket EFI system or traditional carb and using the stock cold air properties of the 82 hood to feed the engine. I'm very interested to see how your system works out.

MIKE80 · 02-17-2013, 07:10 AM

Quote:

Originally Posted by Drawmain

Well thought out and well implemented. I'm interested to see the results. One of the first things I did to my 82 was remove the solenoid and door assembly from the hood to allow cooler air to the intake. In the past I have considered converting to an aftermarket EFI system or traditional carb and using the stock cold air properties of the 82 hood to feed the engine. I'm very interested to see how your system works out.

I'm not sure what the 82' system looks like. Do you have any pictures of it?

Drawmain · 02-17-2013, 09:44 AM

Quote:

Originally Posted by MIKE80

I'm not sure what the 82' system looks like. Do you have any pictures of it?

No, but I can take a few. Give me a little time and I'll have some up.

Drawmain · 02-17-2013, 10:06 AM

Overall shot:

Shot of the opening at the front of the hood:

Shot of the air diverter (if that's what its called...):

Shot of the opening over the air cleaner:

Shot of the "dimples" for clearance of underhood components:

Pardon my dirty engine bay, lol. Let me know if there are any specifics you want and I'll be happy to take more pics.

MIKE80 · 02-17-2013, 10:44 AM

Ah... I see what your saying now. Yeah, pretty much the same concept. I do have an 82' radiator support in mine. I have to look around, I may have the deflector for it. How well does it seal up when the hood is closed? Also, how large is the front opening compared to mine? Thanks for supplying the pictures.

Drawmain · 02-17-2013, 11:32 AM

You're welcome, I like helping out when I can

Just judging from the pictures, your opening is larger than the one on the 82's. It seals really well over the air cleaner and the deflector seals good enough, but I'm sure some air gets by it, there are no real seals on that piece. Maybe some foam seals would improve air flow thru the hood...

MIKE80 · 02-17-2013, 03:04 PM

Interesting...I never saw the 82' hood before, just thought that this would be a good idea. Would it work with a carb instead of the crossfire?

Drawmain · 02-17-2013, 04:28 PM

Yeah, I think it would. You could do it a couple of ways, either find/fabricate an air cleaner to fit the existing hood, or modify the hood to fit an air cleaner (as you are doing). Either way, very do-able. I'm considering blocking off the snorkel on the air cleaner on my car (I have a spare) so that it only gets cold air from the hood. I'm in wayyyyy south Georgia, so cold days are not much of a problem. Right now, since I have time, but not much of a budget, I'm working on porting a spare CF intake manifold to get me by until I decide what I really want to do, either go carb (not likely) or go with one of the aftermarket EFI systems that has a throttle body in the same spot that a carb usually sits. I have time to make that decision, and the porting practice will come in handy I'm sure.