i got a mugen ecu sitting around and was wondering will i loose power if i put this in with my jun'3 on my itr. thanks

 

Not a good combination!

 

jun3 toda program good combo

 

ok everyone says this will not work, but could i get an explanation? thanks(explanation as to why the mugen ecu only works with ctr and itr cams)

 

they don't have the good feul curves the jun 3's need
and vtec probably kicks in earlier than wat is neccessary for the jun cams

 

A Mugen ECU was designed around the CTR ITR Cams Not aftermarket cams, So It wont have enough fuel, Vtec X Over wont be in the right area etc.
Spoon ECU Same thing except it was designed on their Street cams
I would only suggest either
1.) A VAFC
2.) A VAFC and OBD1 ECU (Optional - Raise Rev Limiter)
3.) Power FC
4.) Hondata
Any of the 4 Would be a better choice (with Dyno Tuning) Over a Prechipped ECU.

 

thanks for the explanation

 

Since you got a mugen ecu sitting around, Why dont you try it?

 

Better yet, sell it to someone on H-T for a decent price! It is a FACT that the Mugen ECU was not designed for use with aftermarket cams (especially ones as aggressive as Jun IIIs)...don't even waste your time. Pick one of the options that Mike mentioned.

 

Its a FACT that it doesnt work with aggressive cams, but why does everyone suggest getting an OBD1 ecu with adaptor harness and guess what program they run: Mugen, Spoon, XS, Skunk2(which is rumored a copy of Mugen) when they run aftermarket cams.

 

I always thought you could just tune big cams with a VAFC...although you can't raise the rev limiter and with bigger cams you kind of need that

 

A Friend of mine dyno'd a his JUN stage 3 setup with a Mugen ecu (while he was wating for his JUN ecu). His hp was somewhere in the neighborhood of 175 to the wheels. He ripped the Mugen out and put the JUN in, and pulled 199 wheel hp. So no, it's not a good idea to use the Mugen ecu with th JUN's. IMO it's not good to use a Mugen ecu period. But again, that's my opinion.

 

i dont have a type r...
just a masely 186 hp b16a...i have ctr's and i run the JUN program with those, withh the ctr/JUN combo i netted 22 whp tuned in ofcourse...NO BULLSH*T
JUN PROGRAM WITH ANY CAMS....

 

Skunk 2 program will also work with JUN 3's. I have a JUN ecu available for sale if you like. They retail for way too much though, IM me or e-mail me if anyone is interested. I'll let it go for a good price, I have 2 of them and dont need them both.

 

ctr cams and jun ecu is a good combo
i have had it in the past
but its nothing compared to the toda program

 

Skunk2 is supposedly a Mugen copy.