ZeroBanger

My relevant mods to this thread were:

highflow cat, hks exhaust, modified stock intake (it really worked), Downpipe, blitz smic and power FC and nittos. I had other mods but not important to the question.

My best time I could get was a 13.0 @ 106.7 with a 2.03 60'. My best trap was a 13.15 @ 108. with a 2.02 60'. My boost for both runs peaked at 12 to 12.5 PSI.

ok, I had my hfc replaced with a mp, had my modified stock intake replaced with an rx7fasion cold air box, got a high flow fuel pump and 1200 CC secondaries. I got one run in last week before I broke my differential, and I ran 13.30 @ 106.2 with a 2.06 60'. My boost according to my power FC peaked at .88

According to the shop that tuned my car, the base maps are very rich. there is the possibility that I damaged my differential on that run, cause the launch was a bit shaky, so I am hoping that was the problem, but not sure.

I watched a guy a few months ago run 14.2 @ 102 with a dp, catback and intake. He ran that 2 times. the next week he got a MP and a power FC and ran 12.75 @ 110 (he had a 2.0 60' and stock intercooler).

I don't believe its my driving, I think my car is way to rich. I called SRMotorsports to see if they will dyno tune it, but they were not to thrilled about the idea since they did not build my car.

Anyone have any idea where I can get this tuned for strip? I have to believe that I can lean it out a little without blowing it up. The shop that installed everything does not have a dyno. They install it, download the base maps based on my mods and then hooked up a wideband o2 gauge and took it out the road, but that is not the same as dyno tuning.

Any ideas? I prefer the bay area, I could be convinced to take a drive to LA in december if socal has a good shop.

Thanks!

SPOautos

When they took it out on the road what kind of a/f ratios were you running? If you changed you maps you've basically totally changed your tuning which makes a huge difference. Were the maps they used set up for 1200's???

STEPHEN

ZeroBanger

I did not take it out on the road, the rotary shop that tuned my car did. Yes he tuned it based on my mods, but like I said its a based map, not dyno tuning.

ech

All Dyno tuning gives you is an indication of whether you are getting more power. In terms of setting the best fuel ratios any wideband tuning should be able to do this.

So you say your shop re-tuned the maps with the wideband AFTER you got the pump and the 1200's? If so make sure to find out what A/F ratios they were tuning for. If not, have them do it. As long as the driver doesn't crash its safer for your car to tune that way, or at least less stressfull on the car.

ZeroBanger

I was refering to wideband dyno tuning. I think its hard to take the car out to 140 MPH in 4th gear on the road. my shop has made it clear he does not want to lean my car out because he does not have a dyno to program every fuel map.

so leaving my shop out of this, where can I get this done anyone know?

artguy

hey...there is a tuner up near san fran who can tune rx7s. brett who used to work at m2 (the australian guy) is now working there. It is called vishnu tuning....the owner is the guy whose rx7 is being built for sport compact car magazine....he is an rx7 enthusiast and has been tuning cars for some time.

you can reach brett at 925 924 9800

tell him i sent you over to him...he will treat you right


jason manley

ZeroBanger

Ill call him, thanks

artguy

thats the problem...you are driving an untuned car.

tune by mail is impossible and is total bullshit.

it is guesswork at best. it has to be tuned on a wideband diy or on a dyno. period.

i had the same probs myself....after xs touched my ecu my car ran like ***...and was VERY SLOW....not to mention all the detonation i got from running their so called tuned ecu. whatever...i tuned it myself with the datalogit and fd racer manning the helm and it screams now.

explain that you are going thru a similar situation to me...in that you are dealing with maps not tuned on a dyno...he will know exactly what he needs to do.

j

matty

thats what am i scared about to upgrade the injectors...poor tune after words!

Zero..i know i have said it before..i forget your response....could it be the turbos you have 130k plus miles dont you.
With those mods you sbhould be trapping greater then 115mph.

ech

If you don't plan on running out to 140 in 4th, then do you really need to tune for that?

You can run out the car in 3rd on the road with a wideband... That should be better than no tuning, or tune by mail.

but it looks like you are finding a dyno so that's evern better.

ZeroBanger

My original turbos have only 150K and they pull strong. there is nothing wrong with them.

David

artguy

vishnu tuning is in the bay area....brett from m2 now works there.

call them...they can help you

9259249800

the owner of that tuning shop is an rx7 enthusiast and owns the rx7 car that is being built for sport compact car magazine.


tell brett that i sent ya over to him...he will help you


j

Tim Benton

iTrader: (1)

Isn't the owner of Vishnu, Shiv Pathak, the owner of the 3rd gen that is being rebuilt by SR Motorsports as we speak do to a water O-ring going. I think Shiv knows the haltec system, but hasn't used the PFC on his car, so be sure he "knows" what he's doing with the PFC before thinking he does and letting him go at it.

Tim

artguy

the pfc is not rocket science. the hard part is knowing the rotaries specs for tuning...timing and afrs.

i tuned it myself along with fd racers mastery of the laptop using the datalogit. i had no previous tuning experience other than xs nearly blowing my **** up with their horrible maps. fd racer had tuned his car a bit but now both our cars are tuned pretty damn good.

my afrs are 11s all the way across now and are correctly lean in vacuum...and a bit richer way up top.


as long as he knows rx7s and what afrs they need to run you will be fine on a fuel level. The guy has obvious understanding of timing issues on the car so that should be fine too. if i can tune it, another tuning shop owned by an rx7 enthusast can.

btw...his car is already built...and according to brett is tuned and runs beautifully.


j

r_ed_line53

...the best time to tune it will be on the track (Sac raceway)... hopefully I'll be out there... maybe we can look at it. good luck.


car 53

ZeroBanger

Ed,

Check your PM's. Thanks alot. I left the track last night after my 2nd run in disgust. I know for sure its not my driving. While I know I am no where near the driver you are, I can also say for sure 2 things. First, With identical 60' and the exact same techniques (even with less boost) I got better times when I had my smaller injectors, FP and highflow cat than now with my MP, Injectors and FP.

Second, Turning up or down the boost seems to do little in my car.

The other weird thing? My car is not any more loud with my midpipe than it was with my highflow cat. I have heard other cars with midpipes and they get loud at WOT. Maybe it has to do with my HKS catback, dunno.