Hey guys, I'm new here. Decided to sign up after using the info on this site a few times to figure some stuff out on my car. This site is an awesome source of information! Anyways, got a question. What are the vtec engagement points for some of the B series ECU's? I have a '93 Si hatch with a JDM B18C and LS trans, currently running on a CTR ECU. Vtec doesn't kick in until about 6500 or so rpms with this one, does this seem right? It's a borrowed ECU anyways, so I'm trying to decide what would be a good stock ECU to run with my engine other than the P72 (OBD1 GSR). I would like to avoid getting into a chipped ECU situation for now, just want something that will pack a decent punch in stock form. Thanks!

 

B16A, B16B, B18CR - 5500 RPMs
B18C - 4500 RPMs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlueIntegraBoy &raquo;</TD></TR><TR><TD CLASS="quote">B16A, B16B, B18CR - 5500 RPMs
B18C - 4500 RPMs</TD></TR></TABLE>


Everything is correct except the B18C - 4.5. If you're referring to the GSR then it engage vtec at 5.5 also. Anyting lower is either chipped or mod with a Vtec controller which is pretty stupid. Unless its tuned wtih a dyno.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by project_delta &raquo;</TD></TR><TR><TD CLASS="quote">Hey guys, I'm new here. Decided to sign up after using the info on this site a few times to figure some stuff out on my car. This site is an awesome source of information! Anyways, got a question. What are the vtec engagement points for some of the B series ECU's? I have a '93 Si hatch with a JDM B18C and LS trans, currently running on a CTR ECU. Vtec doesn't kick in until about 6500 or so rpms with this one, does this seem right? It's a borrowed ECU anyways, so I'm trying to decide what would be a good stock ECU to run with my engine other than the P72 (OBD1 GSR). I would like to avoid getting into a chipped ECU situation for now, just want something that will pack a decent punch in stock form. Thanks!</TD></TR></TABLE>


You can use a P2T which is a 99-00 Si ECU. But gotta converte it to OB1 since your car is a OBD1 and the ECU originally came from a OBD2 car. P2T engage Vtec at 5.5 and end at 8.2.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM B16A &raquo;</TD></TR><TR><TD CLASS="quote">


Everything is correct except the B18C - 4.5. If you're referring to the GSR then it engage vtec at 5.5 also. Anyting lower is either chipped or mod with a Vtec controller which is pretty stupid. Unless its tuned wtih a dyno.</TD></TR></TABLE>

Oops, I'm sorry, the GSR (B18C) engages at 4400 RPMs. The GSR does not engage at 5500 RPMs. That would be the secondaries opening up.

 

^---correct

 

ditch the LS tranny and get a b16 or itr

 

Alright, thanks guys. I am planning to get a better trans eventually. Any idea why I'm not getting vtec until 6500 with this CTR (B16B) ECU though? Even my friend who I am borrowing it from says it should activate at 5700. I'll probably just go with a P72.