I dynoed my RX8, huge improvement in torque (from 126 stock to 184 with turbo) across the 3-6K rpm. However, it seems the throttle cable was lifting off a bit after 6K since the engine would "ping" and the hp would get to 195 (up from 174 Stock) and then start falling down. The gas is closing ellectronically because the "dinging or Pinging", maybe the plugs... I dynoed at 5.5 PSI. Does anybody have this problem? Does someone experienced a massive torque gain too?

Let me know, Dyno pics at the end of this page...

 

tq. gain is flat as a board for this kit, so it pretty much comes in right at around 2500 rpm & you get almost max tq @ 3000 rpm. pinging/detonation is definitely a no no. Try to call Benny over at Greddy. I had massive detonation the first time I dynoed it. Turned out it was a bad Emanage programming. They had to re-flash the the Emanage unit. also you can play with the actuator rod on the turbo to up the boost a bit (do this after you solve the pinging problem). Good luck.

 

What map are you using? (greddy, jeffs, or your own?)
Also, what kind of dyno was it... mustang dyno or dynojet?

 

Luis, of all people you should know better. HP and torque are mathmaticly connected. You gain one you gain the other by like amount. What you mean is that you got great mid range increase and not much up top. The reason is you need to pull some timing out of it and/or richen it up on top.
Even though I bet it feels real good to just drive around on the street.

Plus I expect you to sell your turbo and buy my supercharger when it comes out, right.

 

^^ Hurry up...we're waiting :D :D

 

Actually I bet he's TOO RICH up top. That was my problem.

Mine was dynotuned this week and it had the exact same problem of the hp dropping after 6k rpms (My max hp was at 5750!). The shop welded in an O2 bung precat and they used a LM-1 to get the AFR's.
I found that the Greddy map (basically Jeff's 050505 map) was much too rich. After 2hrs of tuning he got it properly tuned and got +30hp (max hp at 8250) and the tq stayed flatter longer instead of dropping.
The difference is night and day. Much smoother and pulls all the way to redline. Even the backfiring has decreased (still pops just not as much).

Right now the AFR is right at 11.5 and 12.0 at high RPM's. Of course, they made sure it wasn't detonating throughout the tuning process.

This was done on the 6.5psi stock boost and it drops at high rpms. I'm going to tune for 7psi throughout the rpms in a few weeks once I get my E-01 installed.


This was all done on a Mustang dyno and I was told beforehand that it would register lower peak numbers than a dynojet. As my graph shows, after tuning I got 193.9hp/163.7tq ,
I have found a dodge dealership that has a dynojet and I've got an appt for Thursday just to compare the 2 dynos.

Also, I did a g-tech run to compare between stock, turbo on, and turbo tuned. It also shows the increase after getting it tuned.

I would recommend that anyone with the Greddy turbo kit, go get a dyno run to check your hp/tq curves and also AFR's. Usually it's $60 for 2 runs and AFR's.
Dyno tuning is more expensive and the shop needs to have experience with the emanage. Tuning for me was $380 ($175/hr +tax). Well worth it to have it run at it's full potential and also reliablility is a must since it's my daily driver.

 

I'm hesitant to post my tuned map since every car is different.
(Especially since I have the hiflow cat, switched the airnix to k&n filter with stock airbox cover, colder leading plugs......)
Also, it was 100 degrees during tuning so that's another variable. I'm right at the limit for lean AFRs so it could be even leaner on other cars and possibly damage the engine.

 

Geez, is that right Adrian ? Is that a +30 whp gain from the original turbo setup, or a +30 hp gain total over your stock turbo. That is still really low, even for a Mustang Dyno. Good luck man. I hope you are able to coax a bit more power out of it. I had the same issue with the hi-flow cat. Finally just pulled it. Bothered me too much for a daily driver.

 

+30hp gain over the untuned map. Graphs are before/after tuning, both with the turbo on.
The hiflow cat could have been part of the problem, but as you can see from the Gtech runs, the power was dropping off around 7k rpms. That was with the stock cat and stock Greddy map.

I'm going to guess the dynojet run will show around 220whp (+25hp over the mustang dyno).

Anyone have dyno's on a Mustang posted with the Greddy kit?

 

ah I see. Do you know what you wee dynoing on the Mustang before the turbo ? I have seen a few RX8's doing about 150 whp on the Mustang. The drop off at 7K rpm is normal. Part of the kit. One reason given was they could not source colder plugs (that you & I both have now). The other reason I think Benny listed on this board as a response to you (wastegate design).

 

No, I didn't do a dyno before the turbo. I did take it in to the dealership to check compression before dynoing and all the #'s were within spec.

Also, I believe the dyno plot I have was in 3rd, so doing it in 4th will also give alittle higher hp#. I'll do a run in 3rd and 4th next week on the dynojet.

 

Hi RP. My car is very very rich. I think it becomes very rich when the car closes electronically the gas wire. I think the car does this to protect the engine. My fuel ratio was around 11-12 and then went almost to 8-9. I will show you the dyno sheet, we did it three times with exact torque and HP results. It was a dynojet and we are using the stock emanage from greddy. The guy who installed it on my car said that the pinging could be the fuel I am using that the octane was not high enoough (91). SO yesterday I went and put 94 in another gas station (Canada). He also said that the pinging could be the spark plugs that needs to be a colder range. I am taking a pic if the dyno and post it in the next 10 minutes. My camera is charging... Thanks

 

If you upload the jeff's map you lose the greddy one right...???

Too risky and i ve driven only a bit my car from the fi period..I have a lot to do but the enthuiasm can't let me stop thinking it...

 

Send it to me. I'd like to see it.

The regular Greddy MAP is available here on the forum.

 

...

 

Jeff can you give me a link....please please i ll go to the shop in a bit for some afterhour job...Please give me a link...You mean the greddy map which is uploaded in the kit when you buy it???the locked one???

 

193 on mustang dyno? I dynoed at 155whp on a mustang dyno. If that's +30 on top of untuned one that mean you were getting 163? Hmm I think I might be missing something here.

 

That's right 163 max hp at 5750 UNTUNED. It felt fast because the torque came in at 3000rpm.

 

Nobody has something to say about my dyno results?? The pics are in the first page, last post. Torque seems to be weird ut we did 3 runs with exactly the same results.
Thanks

 

Hey guys what hp numbers do you hit at crank??i am 99% over 310hp we ll see soon but hey the jeff's map will get me more hp and tq than the stock map of greddy which i purchased in june btw or just help me install again my high flow cat without being lean..???

 

I'm saying you've got the same prob as I did and your map is way too rich on the high rpms. The AFR's going into the 10's and 9's at 6k is superrich. You'll need to get it dyno tuned.
You can try different gas and sparkplugs.

Also, on your graph, I can't see where the RPMs or hp is at. Try to get it scanned.

 

It is hard to read but it is the best I can do without a scanner...(Sketch the lines in paint...)

 

its hard to see the lines luis but from what i can make out i wonder if you had rpm pickup problems. the jaggedy lines in the higher rpms could indicate that. like i said tho- hard to see them.

 

The torque went from 180 to 120 in the 5k to 7k range.
This is just like my untuned map, the torque (the red line on my dynosheet) went from 160 to 100 in the 5k to 7k range.
After tuning it, the torque didn't drop as much (the green line).

 

Luis, you may have a compound problem here. There might be misfiring at the top end loosing power and making the sensors read rich. On the other hand it could be so rich as not to burn. If I remember right 8 to 1 is as low as it will burn. This then causes the misfire and repeates the cycle and so on. What you think is detonation might be missfire.
For sure something is wrong in your tune. I'm just concerned that someone takes the fuel out and it goes real lean. I'd like to see the spark plugs right after that dyno run. Or you could just make some igh speed passes on it and shut it off quicly then look at the plugs.
A new set of plugs never hurts either. You might run both plugs the same range. I don't know what your frunning but most turbo set ups replace the hotter one with the same as the cold one.

It's kinda hard to tell from this far away but those are some thoughts.