Joining the club, FD S475 Build!
Full Member
Joined: May 2003
Posts: 80
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From: durham nc
Quick update:
Car is boosting now. We took it out last night and ran it against mine.
I have a S475 with a 83mm exhaust wheel and a custom .80 t6 rear housing.
He has a S475 with a 96mm exhaust wheel and a standard 1.32 t6 rear housing. At 1 bar starting in 3rd gear and pulling all the way thru 4th we were dead even. We did a low rpm pull in fourth, from about 2k. That's where I pulled him nice. My gates opened sooner and I was in power before him. But who races in 4th starting at 2k. The car is quick as hell and has the supporting mods for him to get it into the 20-25psi range. We will keep u posted on numbers soon.
On a side note, while enjoying some spirited driving my TWEAK-IT racing idler pulley seized up on me. What an ordeal! From a 8pm cruise time to not getting home off the tow truck til 12 midnight, was so much fun. Catch even took off his belt to get my car running, but my main pulley was too small.
Car is boosting now. We took it out last night and ran it against mine.
I have a S475 with a 83mm exhaust wheel and a custom .80 t6 rear housing.
He has a S475 with a 96mm exhaust wheel and a standard 1.32 t6 rear housing. At 1 bar starting in 3rd gear and pulling all the way thru 4th we were dead even. We did a low rpm pull in fourth, from about 2k. That's where I pulled him nice. My gates opened sooner and I was in power before him. But who races in 4th starting at 2k. The car is quick as hell and has the supporting mods for him to get it into the 20-25psi range. We will keep u posted on numbers soon.
On a side note, while enjoying some spirited driving my TWEAK-IT racing idler pulley seized up on me. What an ordeal! From a 8pm cruise time to not getting home off the tow truck til 12 midnight, was so much fun. Catch even took off his belt to get my car running, but my main pulley was too small.
Another update:
Took the car to the dyno to see what it would do. It was a dynojet at CES motorsports here in the Monroe area. Well the car sounded great and was screaming on the dyno. First pull he did 522hp/400 ish torque @ 18psi.
Graph looked smooth and car didnt stumble at all. But after that pull he was a little concerned about a lower idle. Seemed like a pinched or broken corner seal. But it eventually smoothed out. AFR's were great, AI was on, and everything seemed great. So this week a compression test will be done to see the health of the motor, then more numbers to come. This motor has been pleasantly abused for a few years now, so just gonna see if we broke a leg or something.
I will tell andrew to upddate vids and pics when he can.
Took the car to the dyno to see what it would do. It was a dynojet at CES motorsports here in the Monroe area. Well the car sounded great and was screaming on the dyno. First pull he did 522hp/400 ish torque @ 18psi.
Graph looked smooth and car didnt stumble at all. But after that pull he was a little concerned about a lower idle. Seemed like a pinched or broken corner seal. But it eventually smoothed out. AFR's were great, AI was on, and everything seemed great. So this week a compression test will be done to see the health of the motor, then more numbers to come. This motor has been pleasantly abused for a few years now, so just gonna see if we broke a leg or something.
I will tell andrew to upddate vids and pics when he can.
Thread Starter
Joined: Jun 2006
Posts: 1,254
Likes: 0
From: Charlotte, NC
Yeah next week hopefully i can get to the bottom of the idle problems. Dyno was having problems with the brake and loaded the car weird all of a sudden at around 7k and i couldnt get out of the gas fast enough. Sucks but hopefully nothing major, just one of those things I guess. Car was doing great though and i am very happy with the numbers it put down just at 18 pounds.
Thread Starter
Joined: Jun 2006
Posts: 1,254
Likes: 0
From: Charlotte, NC
Little update, the car is back in the batcave due to a suspected broken corner seal. Kind of sucks but at least i can put some better seals in and have everything balanced. Gonna post some tear down pics here in the next day or two.
oh boy...
oh boy...
Thread Starter
Joined: Jun 2006
Posts: 1,254
Likes: 0
From: Charlotte, NC
Broke the motor down today. Rear rotor had a stuck seal on one side right near the corner seal but nothing broke surprisingly. Rear housing is junk which kind of sucks because they only had about 10k on them. Ill post some pics up tomorrow of the irons and housings. One concern I had when i took the oil pump off is that it looks very beat up, lots of groove worn into ever part of the gears. The inner gear had the "dot" facing outwards and the bigger outer gear the dot was facing inwards. Arent those both suppose to be facing outwards?
Thread Starter
Joined: Jun 2006
Posts: 1,254
Likes: 0
From: Charlotte, NC
Well guys im afraid this rebiuld might be slowly turing into an almost complete lost. Really disapointed with the "rebuild" quality of a certain big name shop. Off the top of my head things wrong with this motor- OIL PUMP ASSEMBLED BACKWARDS!!!!! No gasket on the front cover just rtv (some may do this but I im not a believer of doing that), tension bolt were not torqued properly, unfinished ports, Side seal to corner seal clearance you could stick a piece of gum in the gap. Heres the damage...
Rear rotor---front rotor
Bearings
"Good" housing
Rear rotor---front rotor
Bearings
"Good" housing
Thread Starter
Joined: Jun 2006
Posts: 1,254
Likes: 0
From: Charlotte, NC
Thats what i was thinking. Yeah this turned out do be a damn mess that all could have been avoid if the shop/person who built this motor cared about there product. So ive gone from replacing seals to replacing the whole motor.
Thread Starter
Joined: Jun 2006
Posts: 1,254
Likes: 0
From: Charlotte, NC
Little update here, got my motor situation sorted out. Sending the irons to get lapped, but just enough so the nitride coating is still there. Matching set of t2 rotors and counterweights, excellent condition fd rotor housings with cooling modifications, ALS seals, biggest streetport we can get in there, new main bearings, and new rotor bearings all built by Brian at Rotorsports Racing just down the road from me. Cant wait to get my girl going again!
That rotor's like that from the last build. It happens when a rotor is submersed in water for an extended period of time. Either it was a severe coolant seal failure or the engine had water in it and was left in the same position.
You can use the rotor. It's preferred that the erosion be on one or the other side of the rotor and you can just flip it to lead the ignition in the housing...
You can use the rotor. It's preferred that the erosion be on one or the other side of the rotor and you can just flip it to lead the ignition in the housing...
Thread Starter
Joined: Jun 2006
Posts: 1,254
Likes: 0
From: Charlotte, NC
New motors running great! Big thanks to Brian at rotorsports for stacking the motor. Car is at 17 pounds currently with no more fuel to give so I'm stuck till I redo the fuel setup. On the list is ID1000 and 2200s, cj motorsports rails, and gonna give the walbro 400 a try. After that boost goes up and up 
stay tuned....
stay tuned....
This car is beastly. It did 450@17psi and ran out of fuel. I did 435@17. He has.the bigger exhaust housing and should flow more up top. When everything comes in I think he will be running dual 400lph walbros and the ID1000/2000 setup. Car is stupid fast tho..