Just to let some of you guys know that were wondering I just had one of my friends resocket my ecu tonite and I inserted a PYR chip the vtec crossover on this chip is 5200 rpm with a 8700 rpm rev limit. The factory crossover on the pr3 is indeed 4400 rpm at least it was on mine this was right on with my tach the reason I know this is because when I inserted the new chip it now crosses over at 5200. Just thought Id share some info.

 

hear ya, but why so hi? i had mugen chipped with 5k x-over on a fairly heavily modified b16 and wished i'd kept the x-over at 4.4k with the type of power delivery i had....

 

i always thought stock pr3 obd0 vtec xover was at 5200.

 

i know the p72 ecu for a gsr has a x-over at 4400, i didnt think any pr3's did though

 

Thats what I have always read and seen to, but oh well its pretty pointless to argue over.

 

I just thought that 4400 was to low for vtec to crossover. It felt like it bogged down a bit. I dont like the new chip either. I think im bout to get another chip and try it. I dont want the knock sensor I want the vtec crossover above 4400 but less than 5200 and I dont want a speed limiter what do you guys recomend?

 

mugen, spoon, mines vx, feel's, etc.

http://www.hyperducktuning.com

 

I am waiting to get my PR3 back from Adrian @ hyperducktuning. I am getting the MinesVX program which is 5.2k rpm vtec and no rev limit, and I am also getting the Spoon program with a 4.8k rpm vtec and a 9k rev limit. I hope I am happy with what I have choosen.

 

for me with more than average mods, i would suggest the second spoon, but give us some feedback as to which you like...

 

My x-over is 5K

 

according to an autometer tach that i had, the pr3 crossover was more like 4800, with the 92+ b16s coming in at 5200.

 

My reading was off of a stock 89 si tach.

 

my stock tach in 91 ex lagged actual by just under 300 rpm on full accel. runs past 7k rpm...