newRX7fan

iTrader: (1)

I was curious what problems people have encountered in getting their single turbo car to work correctly and make good dyno numbers.

I installed a T04E on my car and got it tuned and dyno'd. I'm only making 325rwhp 12-13psi. This was with no cat, M2 med i/c, Racing Beat exhaust, a street port, + all the usual mods needed for a single turbo. At 15psi, I would have probably gotten around 350rwhp, but shouldn't it be closer to 400rwhp?

One problem the guys at XS found is that I didn't cap the tube that is used for the AWS. Even though the solenoid should be closed once everything is warmed up, apparently under boost it lets some air leak out. Got 8 more hp once it was capped.

I'm going to check out the BOV to make sure its not leaking under boost, and also the ACV.

Anyone know any other things I should check?

maxcooper

I have a single turbo and M2 Medium IC, too. Dyno tuning was difficult because the IC heat soaks without some hefty air flow. I added a Perma-Cool High Performance 10" fan (the highest flowing unit I could find that still fit, with some minor bracket and shroud tweaks) and that helped keep the temps from rising too much, but it is still a challenge. Make sure you have good air flow, use some water spray, ice, whatever it takes to keep the intake temps down. The fan seemed to limit my air temps to a max of 50C, which is still hot but not off the scale. XS sadi my car needed a large air temp correction factor, too. FMICs are much better for dyno work.

The air temp reading on the PFC confirms that the IC gets good air flow and temp drop while the car is moving (mine are typically around 30-40C), but it is hard to point a fan into the duct for effective cooling on the dyno. The manifold picks up a lot of heat, too, which makes the air temp sensor slow to react. Cooling the manifold between dyno runs would help, too.

400 RWHP is a little high with that turbo at 15psi unless you have a really aggressive street port. Shoot for something like 370-380 RWHP at 15 psi while keeping the IC cool. A consistent 370 RWHP feels mighty nice when driving.

-Max

nycRedRex

XS's dyno sheet for a non-ported T04E shows 360 rwhp at 13 psi, so i don't think 400 rwhp at 13 psi is obtainable. i have a street port and T04S and made 360 rwhp at 14 psi. I don't want to run it more than 16 psi on pump so i guess on the street i would see around 380-390 rwhp at 16 psi considering the cold ic...According to XS's dyno, 400 rwhp could be reached at 16 psi on the street. I doubt a dyno run could ever achieve 400 rwhp on pump gas with the T04E or S...But as maxcooper said, 370 rwhp feels pretty good on the street.

newRX7fan

iTrader: (1)

I really wasn't thinking I'd get 400, just closer to it, like what you guys said. And not at 13psi, I'd think 15psi on pump gas is ok and that plus the street port should end up at 370-380.

That's a good point about the i/c heatsoaking; I'd forgotten about that.

And yes, 325rwhp feels almost insane; 370rwhp should be more than enough. Almost don't see how anyone could want more than that. On the other hand, I have a friend who is going to have a 550-600rwhp Supra pretty soon.... yeeeeeeow!

How's your car coming along Max? Is it going to be ready for the OTC?

Tom S

Silver7

I just installed a T04E 60-1 with a .6/.96. I also have the M2 med IC. I am hoping to tune and dyno it in the next few weeks. I will defintitely post my results when I get them. I am even thinking of bringing a .7 comp housing with me and swapping it out on the dyno to see if it gives me better numbers. I would like to see my numbers close to 400 HP but I think I am going to tune conservatively. The whole reason I bought the single setup is so I can run 350+ HP without overstressing the turbo and the motor.

LUV94RX7

iTrader: (3)

Here's my current configuration:
mods: Street port and polished stage II,
upgraded coolant seals,
Hurley 3mm racing apex seals,
XS T04E Turbo,
PFS PMC,
1200cc injectors,
RP Racing fuel pump,
Aquamist 2s water injection kit,
GReddy SMIC,
Pettit ss resonated MP,
Pettit ss cat-back,
under pulley kit(no air pump),
Profec B(12-15psi),

Dave at KDR is still working on it. He says it looks like I'll be getting a peak of 375-390rwhp at 15psi with a real nice power curve. I was hoping for more. I would rather have it reliable and Dave says my combination should be very reliable.

Ken

carcrazy

I know that running a T04E is possible to hit over 400 rwhp. I got 402 rwhp running 14 psi. This was with tuning at X S Engineering. Here is the mod list and the dyno:

- HKS T04E single
- street port (Redline Engineering)
- 2 mm seals (special from Redline Engineering)
- cryo all seals
- lightened and clipped rotors (Racing Beat)
- intake ports cleaned
- pinned housings and other special machining for sand-rail motor (Redline Engineering)
- DynoMax mid-muffler
- 660 cc pri, 1200 cc sec RC injectors
- Greddy SP exhaust
- HKS front mount type "S" intercooler
- ceramic coated exhaust manifold, exhaust housing of turbo, and down-pipe
- SX fuel pressure regulator and Denso fuel pump
- PowerFC computer tuned by X S Engineering
- APEXi AVC-R Boost controller
- Magnecor plug wires
- Irridium plugs
- B&M Ignition Amp
- KAAZ 2-way LSD
- MazdaSpeed Power-Plant-Frame
- B&M Short Shifter
- Brembo large front rotors and calipers
- CWC sway-bar mounts
- Racing Beat front and rear sway bar
- Tokico Illumina 5-way shocks
- Eibach Pro-kit springs
- Volk SE-37 wheels
- '99 JDM front clip and rear wing
- Fluidyne radiator
- huge Earl's oil cooler
- ACT clutch and pressure plate
- Unorthodox pulley set

Rick's Dyno



Rick

maxcooper

Hey Tom,

I'm not going to make the OTC. I was too busy with work to get the little stuff doen before I took the car to Mazdatrix for the motor. In fact, I am still driving it around. It idles a little lumpy and feels weak down low, but it doesn't seem to be getting any worse. I suspect I just cracked a seal without losing any pieces or one is stuck or maybe a side seal or something. It is using a lot more oil than it did before. But it flies now that I got my boost under control. I had the boost controller hooked up wrong for a while (yes, I am an idiot, but I just thought my wastegate had failed completely) and my boost control was just my right foot. It would shoot up to over 20 psi pretty easily in the midrange before I let off the gas and never even pinged. Weird, but it has given me more confidence to run high boost. I might do some dyno work at high boost (18 psi?) and then just turn it down to 15 for street and track. I'll get some decent dyno queen numbers with the high boost, and I can turn it up and run race gas if I ever go to the drag strip. I am running a solid 14-15 now, and I can change it pretty easily. The AVC-R works great once you get the wiring and settings all worked out.

I have been working on the car. I've got the AVC-R installed and working very well, and I also put the AP 4-piston brakes on the front and installed the M2 roll bar. And lots of other little stuff, too. It'll be a beast once I get the motor and get it tuned again for reliable track use. I had XS tune the car conservatively for road racing when I was there last, and the tuning seems to be pretty safe. It took a huge boost run (40 psi? -- my fuel pressure gauge was holding a peak of 85 psi with the stock FPR, but I have noticed that it isn't just 40 psi + boost -- it reads a little higher than that, so I don't think I hit 45 psi) to hurt the car, and even then it is only slightly wounded. That's why I plan to go back to Mazdatrix for another engine (maybe pinned this time, with slightly larger ports) and XS for more tuning.

550-600 RWHP! It sounds like Dan will be passing me on the straights with his new setup! Maybe I'll have to let you drive my car so you can catch him in the corners.

-Max

LUV94RX7

iTrader: (3)

Nice dyno power curve.

I hope my To4e is as good.

mods: Street port and polished stage II,
upgraded coolant seals,
Hurley 3mm racing apex seals,
XS T04E Turbo,
PFS PMC,
1200cc injectors,
RP Racing fuel pump,
Aquamist 2s water injection kit,
GReddy SMIC,
Pettit ss resonated MP,
Pettit ss cat-back,
under pulley kit(no air pump),
Profec B(12-15psi),

Ken

AJC13B

HP=$

That is all.