Hello form an old member
01-18-2006 | 12:18 AM
#1
Thread Starter
Racer
Joined: Jan 2006
Posts: 253
Likes: 0
From: Macon, GA
Hello form an old member
hello everyone. I used to be on here when Rennlist first started. I have a 75' 911 that I have turned into a GT-1 class race car. Now if I was to get into club racing, I would be nowhere near competitive, as I can not afford to fix my car every weekend !! 
I used it primarly for DE weekends around the area. About 4 years ago, I was at a DE event at Road Atlanta, when my engine developed a knock. Well, I spun 2 rod bearings......and I bet you all can guess which 2??
Anyways, I have had the motor apart for about 4 years now. And recently got bitten by the bug again. I have done just about every mod you can do to a CIS car. Bigger turbo, headers, Kokylen (spelling) IC, Electromotive crankfire ignition, HKS boost controller, etc. The car has every unboltable body part made of carbon fiber purchased from M.A. Shaw. I think when I built this car, I kept Kevin Buckner's Business alive ( the racer's group), and might have even financed his Rolex 24 hour stint one year !!! HAHA.
The car has a big brake Kit from Kevin with 14" front rotors with hats. Rears I think are 12". It also has coilovers from The Racers Group, as well as Turbo trailing arms, and Camber boxes welded in. I have a G-50/50 trans conversion in there from Patrick Motorsports ( the box has different ratios as well as being tapped for cooling.)
A full cage as well as cf/ kevlar Momo seats, Gauges by Holloywood speedo, some lexan windows. The car was fast as hell, until the bearings went.
Upon putting it back together, I would like to do the following mods: 3.2 intake with EFI, Twin plug, flowed and P/P heads, new headers as mine our stress cracked,and possibly new I/C.
The turbo that I have now is a Garrett T-36S2, I think I purchased it at Winward, but I might be wrong on that. What have you guys heard about that type of Turbo?? It reaches full boost (1.2bar) right around 2400 to 2600 rpm. I was happy with it before the bearings went. Any advice on the mods that I have listed? My crankshaft needs to be repared. I have heard of a place in CA called CCR ( custom crantshaft repair) and was told several years ago that they do a good job. Any comments on them? He quoted me around $1200 to fix the crank and do a few mods to it as far as oiling channels...??? Anyway, I am glad to be back, and I will attempt to post a pic of my car...hopefully it shows up..... Cheers....Brad
I used it primarly for DE weekends around the area. About 4 years ago, I was at a DE event at Road Atlanta, when my engine developed a knock. Well, I spun 2 rod bearings......and I bet you all can guess which 2?? Anyways, I have had the motor apart for about 4 years now. And recently got bitten by the bug again. I have done just about every mod you can do to a CIS car. Bigger turbo, headers, Kokylen (spelling) IC, Electromotive crankfire ignition, HKS boost controller, etc. The car has every unboltable body part made of carbon fiber purchased from M.A. Shaw. I think when I built this car, I kept Kevin Buckner's Business alive ( the racer's group), and might have even financed his Rolex 24 hour stint one year !!! HAHA.
The car has a big brake Kit from Kevin with 14" front rotors with hats. Rears I think are 12". It also has coilovers from The Racers Group, as well as Turbo trailing arms, and Camber boxes welded in. I have a G-50/50 trans conversion in there from Patrick Motorsports ( the box has different ratios as well as being tapped for cooling.)
A full cage as well as cf/ kevlar Momo seats, Gauges by Holloywood speedo, some lexan windows. The car was fast as hell, until the bearings went.
Upon putting it back together, I would like to do the following mods: 3.2 intake with EFI, Twin plug, flowed and P/P heads, new headers as mine our stress cracked,and possibly new I/C.
The turbo that I have now is a Garrett T-36S2, I think I purchased it at Winward, but I might be wrong on that. What have you guys heard about that type of Turbo?? It reaches full boost (1.2bar) right around 2400 to 2600 rpm. I was happy with it before the bearings went. Any advice on the mods that I have listed? My crankshaft needs to be repared. I have heard of a place in CA called CCR ( custom crantshaft repair) and was told several years ago that they do a good job. Any comments on them? He quoted me around $1200 to fix the crank and do a few mods to it as far as oiling channels...??? Anyway, I am glad to be back, and I will attempt to post a pic of my car...hopefully it shows up..... Cheers....Brad
01-18-2006 | 09:36 AM
#3
Nordschleife Master
Joined: Dec 2001
Posts: 8,305
Likes: 12
From: Kingston, NY
Hi Brad,
It's good that the bug has bitten again, it keeps you alive. So, you spun 2&5 rod bearings huh? What type of RPM are you turning the car? I would guess with CIS you are limited by camshaft to about 6800 - 7000rpm. I personally do not like cross drilling the crankshaft. I don't agree with the principle of doing it, and I don't believe that it really solves the issues. I would rather have the bearing surface on the crankshaft than the groove since it supports the crankshaft better. I turned my first engine with stock rods to 7200 for 6 years and later the second engine to 7000rpm with no oiling issues. I believe that part of the issue is to ensure you have proper rod side clearance and proper bearing clearance for a racing environment, not the lack of oil volume or pressure. For $1200, I would rather see you get a good used crankshaft in 3.2, 3,2, or 964 which you can find fairly easily. Or you can step up and get a GT3 crankshaft, but you'll need new rods with the correct dimensions.
As for the turbo, if it is anything close to a GT35 turbo, it will be too small for your application. You would need something more like a T66 turbo which you can source from Turbonetics. Be sure to get the 360 degree thrust washer.
As far as EFI goes, that is the best upgrade you can make. I would suggest looking at some of the better ECUs with data logging capability since you are tracking the car. A MoTeC M48 ECU is probably the most cost effective ECU for what you want to do, and has built in wide band air/fuel monitoring as well as 512k or logging memory. I'd try to stay away from Autronic since the USA support is gone and the wide band option costs more than the ECU itself. DTA might be another option, but I think it would be nearly what a MoTeC would be.
It's good that the bug has bitten again, it keeps you alive. So, you spun 2&5 rod bearings huh? What type of RPM are you turning the car? I would guess with CIS you are limited by camshaft to about 6800 - 7000rpm. I personally do not like cross drilling the crankshaft. I don't agree with the principle of doing it, and I don't believe that it really solves the issues. I would rather have the bearing surface on the crankshaft than the groove since it supports the crankshaft better. I turned my first engine with stock rods to 7200 for 6 years and later the second engine to 7000rpm with no oiling issues. I believe that part of the issue is to ensure you have proper rod side clearance and proper bearing clearance for a racing environment, not the lack of oil volume or pressure. For $1200, I would rather see you get a good used crankshaft in 3.2, 3,2, or 964 which you can find fairly easily. Or you can step up and get a GT3 crankshaft, but you'll need new rods with the correct dimensions.
As for the turbo, if it is anything close to a GT35 turbo, it will be too small for your application. You would need something more like a T66 turbo which you can source from Turbonetics. Be sure to get the 360 degree thrust washer.
As far as EFI goes, that is the best upgrade you can make. I would suggest looking at some of the better ECUs with data logging capability since you are tracking the car. A MoTeC M48 ECU is probably the most cost effective ECU for what you want to do, and has built in wide band air/fuel monitoring as well as 512k or logging memory. I'd try to stay away from Autronic since the USA support is gone and the wide band option costs more than the ECU itself. DTA might be another option, but I think it would be nearly what a MoTeC would be.
Last edited by Geoffrey; 01-18-2006 at 11:45 AM.