If I can get around the fuel cut revlimiter, is there anything else to watch for (timing?? at 6500+?)

If I could find someone with an OBD watcher, I could tell.. I'm guessing the ecu goes into excessive retard, which maybe I could help by advancing timing in emanage?

 

I'm pretty sure most cars go into excessive retard at high RPM...to me that only makes sense I guess. I know for sure from loking at my stock maps my integra does(and I shift at 7200 on my modded maps/setup). as far as advancing with Emanage...so far from what i know thats a no go when using the in-line diode "mod".

EDIT: heres a good example of one of my close to stock NA maps...you can see how "hot" it is off the line and how upper RPM at higher vacuum "cools" down significantly, but is still mildly advanced

 

what is the exact timing for our cars anyway?

 

15BTDC....its usually +/-2 on all cars though so I guess 13-17 is allowable

as far a seeing the total timing or various timing degrees at certain points I'm guessing you'd need an obd reader

 

how do you plan to get around the rev limiter?

 

Man Ashanti looks good in that pic!

 

This is what I saw on the dyno on my stock ECU...


4k- +23
4.5k-+17
5k- +24
5.5k- +23
6k- +24

Used an OBDII tool

 

that is a WHOLE lot of timing - typical for an NA car. If you could retard it you could run a lot more boost w/o detonating. A friend of mine is running a DSM ecu in his KA-turbo for that very reason. It is making much more whp now.

 

tell me about this DSM ECU swap thing! a friend of mine has a KA turbo but doesnt want to crank the boost due to no boost timing retard.

 

My friend has a KA24de s13 with a custom t3/t4 set up. He has friends that own a dyno/tuning shop that specialize in DSM's. They know their DSM's inside and out. They basically went thru the DSM ecu pin-out and decided what they needed and tore about the wiring harness to get rid of the stuff they didn't need. They used a combination of DSM and KA sensors. Amazingly enough, many of the dsm sensors fit on the KA. The real trick was in the distributor, but they won't tell us what they did.

The were able to keep all the gauges from the KA. The only thing they couldn't do was the ignition, so he now has an s2000 start button.
he ran a low 13@110 last night. he is just limited by his stock DSM injectors. Oh, and he did not need ANY tuning on the DSM ecu.

pretty cool idea if you ask me!

 

a friend of mine might be interested in this, whats the cost and difficulty of making it happen? hes very reluctant to have his jim wolf ECU reprogrammed and wants some kind of ignition boost retard and to remove his speed limiter. its definitely an excellent idea, hopefully your friend/the shop is willing to give up some information. he however has a KA24E with a 60 trim T3 and 440cc (skyline?) injectors. the more DIY we can do the better.

 

does anyone know the timing increase at different rpms with the JWT or TS ecu?

 

KA24E's can be reprogrammed with an eprom burner or Live edit and a romulator. Very easy and cheap. 179 for Romulator, you need access to a laptop, and find someone with an eprom burner when you're happy with the tune. DSM's have the same crank sensor as nissan's. (the early 90's ones anyway)
Bernard

 

If you got around the fuel cut, what would you do about hte fuel maps? I dout there is any fuel maps after 6550 stored in the ECU. So you would have to control that. And same for hte ignition timing. That is why JWT uses a daughter board with extended fuel and ignition maps.

I am not 100% sure on that, but I think I am right.

 

Thanks Bags!!