3.9 RSR project --- my Carrera reborn

[Gene Wilkes]

I would make a special trip to the track just to SEE this awsome machine!

[tom1394racing]

Chris and Matteo

The IROC style and '74 RSR front bumpers had the large holes for cooling the front brakes without any fender or hood venting. It worked OK for the factory back then. I would not do anything to the fenders or hood that would destroy the period appearance of what is going to be a very special car.

[mjshira]

I have to agree with Tom.

[911teo]

Yes I agree. We are talking about the oil cooling flow. The RSRs had a diffuser that would channel the air flow under the car.
We are ducting that flow through the front trunk to the wheel wells.

The best solution would be to have a vent in the hood.

I'll post a pic of what I am talking about as soon as I find it!

[VZ935]

Matteo ,

Just found this thread and I feel so much better. It is nice to know there is someone else out there as sick as I am ! As a comparison here is some info on the normally aspirated 911 I had. The cage was almost identical to my GT1R race car.. all the ERP stuff, camber boxes.. all that good stuff. I did have a full carbon 993 wide body on the car . That being said it came in at under 2200lbs. with 10 gallons in the tank . Chassis wise , you can't do any better I believe. But I had a mildly worked 3.2 liter motor. Bigger trottle body, SCarGo Racing headers and some mild work. I am sure no more than 300hp at the wheels..with 315's in the rear if I stood on this thing it would haze the rear tires in 2nd gear. I completley humiliated my friend in his 993 twin turbo..so with your Motec,3.9 with Jenvey's and all that great stuff all I can say is cinch up and wear a diaper your first time out As a side note Excellence did a 8 page spread on this car and the author David Colman said soemthig to the effect that it was the most fun he ever had in a 911...that being said I think you are raising the bar and will be more than pleased with your end results. Congrats !

[Craig 930 RS]

Wha-ha wowza.
Makes my 930 coplete engine bulid look like a cheap porposition!
Very cool.

[randywebb]

we need more pics...


one of the really interesting cars -- great work!!

[GT2R]

The best oil cooler / cooling setup was used on the 993 RSR. Two stock 964/993 oil coolers turned perpendicular to the car direction/air flow with air ducted from the front bumper cutout directly to the cooler and then dumped out into the fender. This will keep an RSR 3.8 sprint motor at 177 degrees during an enduro at 95 degree ambient. There is less then 15 degree spike when the car is not moving and there are no fans. Air flow must be directed without opportunity to get around the cooler.

[911teo]

Leaving the tub aside for a second (I might try and go to the shop and take more pics as it leaves for the powder coating) I thought I'd post some pics of the motor coming together (well as it is being built by Dr Timmins).


The crank










With the cylinders






The heads




And the induction









The fan is missing as I am going to have it powder coated Mexico Blue.... I know I know... it's for the poser in me

[mjshira]

looking very good!

[CBRacerX]

Tell Steve he needs a few more fasteners on those cam housings

Looks sweet!

[911teo]

Cams are not in yet... there was a little issue with the ones we ordered.

Dr Timmins put it together for my benefit, so that I could "see" it. He's a great guy from that point of view.

[juicersr]

http://forums.pelicanparts.com/smileys/smileys4.htmhttp://forums.pelicanparts.com/smileys/smileys4.htm#http://forums.pelicanparts.com/smileys/smileys4.htm#http://forums.pelicanparts.com/smileys/smileys4.htm#

[CBRacerX]

Steve is very excited about this project as well, I'm sure. If I can get down there before it ships I would love to take a look.

[juicersr]

Well, that last post didn't work. Absolutely incredible looking engine. Can't wait for the fire up and dyno.

[911teo]

Originally posted by CBRacerX
Steve is very excited about this project as well, I'm sure. If I can get down there before it ships I would love to take a look.

I am driving up the car with the 3.6 when the chassis is done.

Steve will install the engine and perform the in-car tune up.

I plan (and I am sure I will need to add at least 1 month to this) to drive the car up in the 1-2 week of August. In fact there is a 3day event at VIR on the 4-5-6th. Hopefully I can attend that and then continue Norh and deliver the car to Steve.

You are more than welcome to check it all out when it's there...

[CBRacerX]

Sounds like something to put on the calendar! I'll keep my eye on the progress, this is a great project.

[ischmitz]

Originally posted by CBRacerX
Tell Steve he needs a few more fasteners on those cam housings

Looks sweet!

Maybe he can use some of the blue tie-down nuts he put on the head studs. Two per barrel would do just fine since they are light

[911teo]

If you guys don't stop he's going to make me take the pics off

So be nice or I'll tell Prof Timmins!

[911teo]

Originally posted by tom1394racing
Chris and Matteo

The IROC style and '74 RSR front bumpers had the large holes for cooling the front brakes without any fender or hood venting. It worked OK for the factory back then. I would not do anything to the fenders or hood that would destroy the period appearance of what is going to be a very special car.

Tom

I found the pic that I was thinking about.

Now disregard the fact that this is an pre-bumper car but the concept is going to be the same.

It looks like this car has the front oil cooler with a sort of RSR panel that channels the air-flow up inside the hood.

Their solution (very similar to what we'll do) is to use 4 ducts to dissipate the airflow inside the wheel well.

For the brakes we'll use the openings in the IROC front bumper connected to the proper ducts. I have the brake plates already. The only question is to whether we are going to run the ducts under the car or inside the front trunk.

The idea of opening up the front hood is as a last resort if we do not obtain good cooling this way.

I hope it is more clear now