I'm back. Sorry it took so long to finish my single-turbo swap-out, but it's done. I have a question for you...I have terrific power, but when I let off the throttle, sometimes I get considerable smoke. I hit the throttle a couple of times, and it goes away. It seems like it does it more when I give it a good hard full throttle on acceleration and back off real quick.

Anyway, back to my modifications. I removed the factory twin turbos, solenoids, air pump, vacuum lines, intercooler, intake air box, cats, muffler, exhaust system, ecu, and clutch.

I then installed an Exedy Stage 2 racing clutch, a T3T4 single turbo and tubular style exhaust manifold, a 5" cone style turbo intake pipe & filter, a 50 mm blow-off valve mounted between the turbo and the intercooler with 2 1/2" piping into & out of the top back-side of a 3"x12"x21" XSPower intercooler positioned in the stock location and braced to the front of the engine compartment, stock engine internal parts, stock injectors, stock fuel pump and delivery system, simple modifiation of stock upper intake manifold to match up with intercooler outlet, stock lower intake manifold, 60 mm racing wastegate with a 12 lb spring for boost control dumping into a 3" straight-through exhaust system from the turbo to the chrome tail pipe tip. I had to install a 3" racing resonator, because the car was so outrageously & obnoxiously loud. Now it is just outrageously loud. All of this is now controlled by an APEXi Power FC, dyno-tuned tuned here in Mesa, Arizona, by Tony Szirka at UMS Tuning to a liitle over 300 hp to the wheels and about 270 ftlb of torque. Maximum torque was achieved at about 5,000 RPM, with maximum horsepower at about 6,400 RPM. We ran out of "air" with the boost controlled at 12 lbs. We still had enough fuel capacity to go up to about 14 lbs of boost, but I opted for the extra margin of safety, given the stock engine and fuel delivery. I modified the factory battery tray and hold-down to fit a smaller solid-cell racing battery in the stock location. I kept the stock air scoop to direct cool air to the battery and stock AC cannister.

The car has already been featured by Charles Siritho as the "July Car" in the 2010 CARS AGAINST CANCER CALENDAR (along with my 2001 Nissan Skyline GT R34, January and back cover).

I also won an unofficial "LOUDEST CAR" competion at the Pavilions Car show in Scottsdale, Arizona (held during the evening after the Good Guys car show the same day). I was up against a lot of loud, but not-so-loud-as-mine, piston engined cars. It was no contest. As I went up to 8,000 RPM, you couldn't even hear the other cars.

Let me here from you. I'll try to post some photos.

 

u need to put a duct on that SMIC ASAP..

unless ur saving up for a rebuild..

right now it's just a heat soaker..

 

Thats a fine example of a CYM, but duct that SMIC. Just wondering which car do you prefer better?

 

Nice, always loved the CYM color. Duct that SMIC and you'll get a little more hp.

 

Those are some nice cars!

As for the smoke it's most likely your tune when you let off you are getting an extreme rich mixture causing the smoke.

 

Before you go dropping cash flow on a new tune...
Drive the car a few miles with the oil filler cap off and see if it continues to smoke

 

Thanks. I am designing a simple aluminum plenum to attach to the face of the intercooler and the stock plastic deflector/scoop, similar to the stock plastic one, but much larger. I am also going to install a heat shield between the turbo and lower intake manifold. I'm not sure if I really need to isolate the intake air cleaner. It seems to be in a pretty good location for cool air. I will probably wrap the exhaust pipe from the turbo down to the waste gate as well.

 

I'm planning to duct the intercooler. As to the two cars....I love R1's. This is my second. I bought a new red one in 1993 and was sorry I sold it (to buy a BMW 750il). I was lucky enough to find this "Yellow" one a while back. It takes a bit getting used to the turbo lag. I get plenty of attention and it is faster than the Skyline, but I have to admit I get ALOT more attention with the Skyline. I get calls all the time for photo shoots, car shows, car club meets, and "can I have ride". Since it is JDM right down to the right-hand drive, and is so rare, people take vidoes and photos every time I take it out on the road, stop for gas, go to the store, or just have people over to visit. When I go to the car shows, a whole crowd will follow me to where I park then take tons of photos the whole show...from young wanna-have-one-some-day to professionals with their expensive models. It is weird. I still love my R1. It's louder, faster, prettier, and more zoom to the gallon.

 

You are right. I like this CYM colored R1 better than my red one, but when I bought the red one, I liked red better. So much has changed in 17 years? But I've been fortunate enough to have owned two of the rarest "tuners" in history (three, if you count my Skyline). All I need is a Dodge Charger to complete my "Fast and the Furious" garage! (I used to have one...a long time ago)

 

You are right as well. I checked with Tony at UMS. He said that's typical with a stock feul setup and stock seals. I gotta be careful not to lean it out much more. He did say we ran out of "air" at 12 lbs of boost. I may change out the wastegate spring for 14 lbs, if he thinks we will be safe. I'm not ready to go into the engine yet.

 

UMS tuned the car just after I finished the turbo swap, but I tore off the wastegate on a speed bump the next day. I replaced the waste gate with what is supposed to be the same 12 lb spring load, but I haven't been back to UMS to verify the tune is the same. I would appreciate any input and opinions about the necessity of re-tuning after replacing the wastegate. I remember the smoke on the dyno during the tune, but only on full throttle release. Tony said something about why that happens to be normal, but I don't remember his answer.

 

I checked with UMS about the smoke on deceleration. I need a new tune, since replacing the waste gate. evidently the springs are different.

 

So let me get this straight. There's TWO CYM R1's in the PHX area?? Sweet. You on AZRX7.com?

 

All this work and all you got was 300whp?

My stock twin with 850 primary and 850 secondary made 310whp at 12psi and 268 ft-lbs of torque.

 

+1

 

Yep, you got it. The stock setup is still pretty awesome. Your similar HP output is due to bigger injectors. My injectors are stock. Where my setup has the advantage is when you go to bigger injectors (like yours) and I can boost to match, up to about 14 lbs without any internal engine changes. At 302hp, my stock injectors still had fuel to spare, but I was limited by a 12 lb spring. Bottom line... alot more horsepower awaits a bigger spring, possibly this weekend. I'll let you know. I'm told I will probably max out at a "safe" 400 hp with spring and injector changes with all stock engine internals and fuel pump (spring first, then injectors later). Without the Power FC, I think I'd be "sunk". I am also going to change out the exhaust manifold gasket to a graphite racing style gasket. I've already "burned" through this one.

 

Yep, 2 CYM's here locally. The other one is owned by Tim. Glen, over at Rotary Rockets, did alot of the work on Tim's CYM (kinda poetic, don't ya think?). He has put alot more money into his car and has won some car show events with it. I don't know if I'm on AZRX7 or not. I'll have to check it out. I don't get on the website forums much. Well, I gotta go for a loud ride right now...see ya.

 

Congrats on the build and it looks like a very nice car.

But I am unsure that you will be able to put 400whp out on the stock fuel pump. Really, I am not sure why you have not changed it yet, it is an inexpensive and "necessary" upgrade for any fuel system change. The stock fuel injectors even take benefit from a simple pump change.

I am curious by your comments on engine internals. If you changed internal engine components to handle more boost (or create more hp) what would those be? Portwork is really all I can think of. And more than 400whp can be had on stock ports.

A few suggestions: Make sure that both nipples on the oil fill tube are not capped. One needs to be vented so that the system is not over pressurized.

The air filter does not need blocked off but it certainly would not hurt. When you build your duct for the IC you may also be able to route some of the air to the air filter.

You took the car back to the shop to see if the tune changed. Do you not have a Wideband O2 in the car? If not I would recommend you pick one up to monitor the tune and fuel burn of the car while driving.

 

I agree that you are severely limiting your cars potential by stayint on the stock fuel system... def upgrade the pump/injectors and ensure you have the proper spark plugs in there... also, when are you reaching full boost?

 

Sweet, a while back I thought I saw a CYM out by Higley and McKellips. We have a CW and live up at Power and Thomas. The FD is torn apart but we still go to the Pavs with the RX8. Hopefully we will see you out there sometime. You might have some competition for loudest car if we bring the 8 out there.

The car looks great. Good luck with it.

Lynn

 

Nice to see another local CYM. You could pick one of these up if you are looking for a lim heat shield; they are local too.

http://www.turblown.net/store/index.php?productID=56

You're over due on one of these too;
http://rx7.com/store/rx7/fdfuel.html#fuelpump

 

Back to the smoke....

Where did you vent the housings' oil nozzles to?
They should go to the filtered atmospheric pressure.

The same goes for the lower oil fill vent, it goes to filtered inlet air. The top vent tube goes to the pcv and then the upper manifold.

Barry

 

I am going one step at a time and trying to see how much I can get out of each step. The fuel pump and then injectors are next. As to the engine internals, all you can really due, short of extensive "race" application specific stuff, is porting and apex seals. Since I can't see any real need for anything over 400hp, I don't plan on any engine mods.

I do have a PowerFC with a "Commander" that I use to monitor as I drive. My tune did not change, my boost changed, making a re-tune necessary. The actual reason for the re-tune comes from replacing my waste gate ( it got knocked off on a speed bump). I thought the new waste gate came pre-sprung at 12lbs, but my boost gauge is showing 1-bar, which is a quite a bit more boost.

I will check out the oil lines to make sure they are properly routed.

 

I may be going to Pavilions with the CYM tomorrow night. I may take the Skyline as well. I'm not sure yet. My tune at UMS isn't until Tuesday, so I am going to be a bit careful not to get into the throttle too much until then.

 

As stated in my original post, full horsepower (302 whp) was reached at 6,400 RPM. With the boost limited to 12lbs, that's all we could get. It will change with the re-tune and additional boost.