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Posted by: timmck69 Jun 14 2003, 04:23 PM

Looking for advise on creating air boxes fed from a duct on the roof. My car is a GT4R PCA race car( 2.8 liter) I have seen a few limited pictures of this on other 914 race cars and would like to talk to venders and/or customers who have been through this.
Thanks

Posted by: URY914 Jun 14 2003, 04:28 PM

you mean something like this...


Attached thumbnail(s)

Posted by: Andyrew Jun 14 2003, 05:11 PM

Ouch! actually I think Ive seen this car before, looked nice before.. and I think that that kind of ram air would be most efficiant.

Posted by: efrenv Jun 14 2003, 05:32 PM

No. 13 ... bad luck ...

Posted by: TimT Jun 14 2003, 05:39 PM

Thats my friends car, Tony N, the car and trailer are for sale now (the car has been fixed obviously) The scoop is sheetmeatl, the airbox is lucite/lexan/plexiglass, something like that. In the airbox are 2 k&N filters and a fabricated plenum over the throttle bodies.

Tony now races mini coopers in Grand am and ALMS

Posted by: Qarl Jun 14 2003, 05:43 PM

Try here...

http://www.v8914.com/

Posted by: URY914 Jun 14 2003, 05:44 PM

This was taken at Sebring PCA race. It never seemed to run too good.

I personlly don't think this kind of scoop did anything to improve performance. It did not provide pressured air to the engine as far is I can see. Not when it had to go those two filters.

Paul

Posted by: timmck69 Jun 14 2003, 10:31 PM

I've seen Tony's car and thats the general idea but the scoop need to be more like the GT1.

Posted by: timmck69 Jun 14 2003, 10:37 PM

When running my 2.8 at higher rpm we feel that there are two problems with air flow over the roof. 1. The air tumbles and is warmer than ambient. 2. there isn't enough volumn. The ram air may or may not be an added benefit.

Posted by: Brad Roberts Jun 15 2003, 01:43 AM

Tim,

Your friends with Tony Nuzzo ?? I'm freinds with the guy he sold his Boxster to in Arizona.

Roger Sheridan runs the cleanest setup I have seen for a top mounted system. He runs two NACA ducts in the top with 2 3 inch hoses leading straight to some custom air boxes he built for the 52mm TWM.

He has a small (almost undetectable) scoop on the targa skin.

I'll get pics..

B

Posted by: TimT Jun 15 2003, 09:38 AM

Brad I know Tony through the local chapter of the PCA, He used to be pretty active with DE and club racing, the he started his own ALMS or grand am team racing the new mini coopers, prepared by Bodymotion in south jersey.

I though he sold the boxter to the guys from EBS?

Posted by: timmck69 Jun 18 2003, 05:17 PM

Does anyone know Tom Gonzales from Santa Fe NM. I saw a picture in a club racing magazine of his car and it may have what I am looking for.

Posted by: cha914 Jun 19 2003, 07:31 AM

I was thinking it would be cool to do something similar except instead of NACA ducts in the roof, doing them in the sail panels. However what is the airflow situation over the sail panels? I am guessing not nearly as good as the roof...anyone know?

Tony

Posted by: brant Jun 19 2003, 08:08 AM

I know tom gonzales... but I don't have any pictures.
A number of the grand junction cars run a ram air also.

Allen Johnsen builds them to pick up off of the roof (I think NACA ducts) and then square clear plexiglass tubes that feed down to each side of throttle bodies.

go to the PCA national club link site. Look for the pueblo/vegas/GPR/and some of the California event pictures. You might see some shots.

brant

Posted by: Dave_Darling Jun 20 2003, 12:14 PM

John Rogers in Sandy Eggo runs a small inverted wing all the way across the back of his roof panel. It sticks up only an inch or so, and curves down across the rear side of the roof. Pretty much just shoves air down toward the engine lid grilles.

He said it was one of the best cooling system mods that he made; getting cool air into the engine bay. Not sure if it did anything for power or not.

--DD

Posted by: seanery Jun 20 2003, 12:18 PM

If it helps the longevity, I think that's probably good enough, huh?

Posted by: URY914 Jun 20 2003, 12:27 PM

Why don't more 914 race drivers just run without the engine cover on? OK, maybe you need it for tech, but if you took it off for a race would anyone protest you or would you really get black flagged?
I don't use one on my autox car but I realize the rules are different.

Paul

Posted by: Brad Roberts Jun 20 2003, 02:32 PM

Intresting tidbit:

My tube car wouldnt pass sound at Laguna. We taped off the engine lid..and it got WORSE. When we removed the engine lid.. the sound went down and we passed. We run without the engine lid if need be. SCCA is the only group worried about the cars being "complete".

Here is what Roger Sheridan runs.

Posted by: Brad Roberts Jun 20 2003, 02:35 PM

And the inside. Roger noted significant gains in power. This is the CLEANEST install I have seen. It is very "undectable" from the outside. I hate the add on crap that looks like its from PEP BOYS.

B

Posted by: seanery Jun 20 2003, 03:34 PM

damn, he's hardcore...no padding on the cf seat!
That can't be comfy!!!

Did he make that seat?

Posted by: brant Jun 20 2003, 07:07 PM

brad,

AJ's installs also run through the passenger compartment and then through the back window area....

nothing sticks up or creates drag.

He is very concerned about drag.. (you wouldn't think it with the big rear wing...)

He showed me a few tricks that they are using on the oval at las vegas... claims they picked up around 7mph on the oval just from the aero mods.

brant

Posted by: Aaron Cox Jun 20 2003, 09:57 PM

he's not hardcore, his butts sore! ...cant be comfy at all....there was a beetle in a VW mag, that had a Type IV 2850 cc monster, that had little passive scoops on the rear ventwindows, to feed the 52 mm webers!