Rpeck

Here are some of my dyno sheets. Amiss all of the confusion there is a hodge podge of sheets here. I ended up with double copies of my early runs and no copies of my final runs. There was 2 different HP ratings given. One was pure real wheel HP and one is estimated Engine HP based on tire size, diameter, gear ratio, and final drive ratio. With this being my first time ever on a dyno and the mishap with having to take my whole manifold off it was a crazy day.

Does anyone know what format these documents are saved in? I e-mailed the guy because he screwed up on the printing. I am hoping he can E-mail the others to me These are all listed at around 2 PM .. I didn’t leave until 5:00, I stopped runs at 4:30. My final estimated Engine only HP was a computer aided guess of the mid 320’s (324 ish if memory serves) The final RWHP was in the high 260’s (268 if memory serves) both of these runs were at a topped out boost of 9.51 PSI. That’s a whole nother ballgame … I am still not positive why I could not exceed 9.51 PSI .. I kept turning up the boost controller but the PSI just did not go any higher than that. I should be capable of easily pushing more boost than that … but I THINK my BOV was leaking. I’m really not sure yet, this weekend’s project consists of figuring out why I did not boost higher.

I will post the final runs sheets as soon as I get them, I will drive back down there if I have to .. but I am hoping he can save them and mail them in a format I can read. The graph on that one is REALLY cool! The left side is the estimated Engine HP and the right side is the true RWHP .. and you can see how the graphs aligns and it lists the drive train specs at the bottom … that’s what it uses to base its calculations on. One of the things I was really impressed with is that the car’s HP is still going strait up at 7600 RPMS. it is ready to make more power .. but I was killing it at 7,600 I still only have about 1600 miles on this motor, I did not want to push it to hard. I should have took a better look at the print outs before I left but It was 4:30 and they closed at 5:00 and I still had to pull at the equipment off my car (O2 sensor, boost, Vac) .. it was kind of a mad rush at the end.


Robert

Rpeck

P.S. i'm really not sure whats up with those wild torque numbers. He tried to explain that to me .. but I was to busy stressing out .. It's damn nerve racking to keep redlining your Baby over and over ... and the noise was just unreal!

Oops meant to edit.

adamlewis

edit: n/m looked at it closer hehe

turbo dan

That's some cool stuff Robert.
You've got a start on an awesome car.
I swear I'll get up there to check it out one of these days.

Dan

hawk 7

iTrader: (2)

So what were your FINAL hp and torque numbers??

Rpeck

Final numbers as it sits right now. at 9.5 PSI is 268 RWHP, 324 BHP.

Torque I did not look at that close, but I am thinking 245ish Torque.

I should have the final sheet in a day or 2 to confirm this. I might even get them tommorow, I'm not sure how often this guy checks his E-mail (he didn't seem very computer literate)


P.S. these were all 4th gear runs, i forgot to mention that above.

LOCAL PEOPLE;

The cool thing is, they rent there dyno machine for $500 a day you get free reign of the whole machine. you are expected to know how to use it. This machine is a dynapack (the best machine in the world for tuning) if we get 3 of us ... we can help eachother out and get 3 Hrs each per car for only $166 thats a great price! let me know if anyone is interested in a GB of dyno time I am putting in a FMIC very soon, and fixing my low boost issue then I want to go back again. (I can opperate the machine)

Barwick

you don't get full boost till WAY high in the RPM range it looks like.. is that intended?

presetlimits

thats awesome..man wish i lived local to you to rent/use the dyno for 3 hrs

Rpeck

Well I am still trying to decide how intended that is. I know the large street port is for alot more high end power & I think the clip on my turbine wheel adds to that also. Next time I run I am going to see if its the same way in 3rd gear. As you can see by the chart though my power band is still going strait up at 7k! so once I break the motor in a bit more next dyno run I will try a 9k run ... just to see when/if I start to loose power. But for optimnal performance I do need to wind it out. It feels really strong at the lower RPM's also .. I rarely wind out to 7k on the streets .. I am yet to race a car that I have needed too

RETed

Wow, nice numbers!
Those boost graphs look kinda bad though - it should be making full boost easily by 5kRPM, if not by 4kRPM...hmmm, especially in 4th gear.


-Ted

Ryde _Or_Die

Damn thats nice man. I will eventually be getting a stage 4 from Bryan and push it up to around 15psi max. I hope for around 350hp.

Rpeck

What are potential causes for the boost kicking in at such a high RPM? It feels great on the road .. not sluggish at all, but numbers don't lie .. I am thinking I might have a semi drastic leak somewhere.. thats why the boost is at such the high end, and why i could not exceed 9.59 PSI. Any other ideas?

jmseven

Your boost controller set up might be the prob. Chk your lines to the WG. I had a similar prob with the Greddy TVVC. Found out that my Vac lines to the WG was too long.

Also, chk the OD size of the lines themselves. They might not be big enough.

RETed

Do you have an aftermarket boost gauge on-board?
Does it correspond with the numbers that are on the dyno run?


-Ted

Rpeck

No, I have ordered a complete Defi set from the Rx7store. But they are on back order for about 2 weeks. But my stock boost guage seems to corospond with what the dyno was saying. I have no FCD so my stock gauge is 'somewhat' accurate. I was blowing in the boost reader on the dyno at the shop and it reacted instantly... BTW: I can blow about 2.5 PSI The thing is once I start boosting it pulls through the RPM's so fast its hard to keep an eye on the stock gauge .. I need to look at the road it picks up speed real F-in quick.



None of my boost controller or WG lines are particularly long .. and they are all the stock diameter.

Rpeck

Okay i just got home from work and i was out in the garage pondering the 7. I had a thought (I know scarry) here it is;

Since my boost was maxing out around 9.5 PSI (I assumed it was my BOV, but I am doubting that now its a type H 10-25 PSI BOV) 9.5 is a bit low for that to leak so early.

So, though #2 ... what if I have a leak somwhere else? thats why my boost is starting so late in the RPM band ... at lower RPM's the turbo is spinning less creating amble boost .. but my leak is leaking off the boost pressure... BUT by the time I hit real high RPM"s maybe the turbo is creating so much boost that the leak cannot leak the pressure out fast enough... therefore I start to get high boost at high RPM's but I never hit my full bost potental, and it boosts so late.

What do you guys think? does this sound like a posability?

Thx for the input,

Robert

RETed

Possible, but you would hear the boost leak?
I would start by replacing all the existing clamps with brand new clamps.


-Ted

Rpeck

Ya I have a internal debate there.. I want to put in a FMIC, so i am debating if I want to dump more cash into the TM, by replaceing all the hoses and clamps and such.

This is my first turbo car so i am not sure if I could reconize the sound of a boost leak .. and at the dyno shop the engine and exhaust was SOOO loud I could not hear myself think, much less hear a leak.

Damn if its not one thing its another