I just thought about this - say if I am boosting at 7 PSI and I install a Normally Closed (NC) 8 PSI Pressure Switch (Only cuts the switch when it sees 8 PSI or more) onto the charge pipe going to the throttle body and then hook up the Pressure Switch in between the +VE side of my ignition coil so that if by some chance it sees 8 PSI (overboost), the normally closed pressure switch opens and cuts off the spark / ignition.

I think this will be a nice safety measure and I do not see why it would not work. Anyone care to chime in?


Modified by pcguy760 at 9:10 AM 7/22/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pcguy760 &raquo;</TD></TR><TR><TD CLASS="quote">I just thought about this - say if I am boosting at 7 PSI and I install a Normally Closed (NC) 8 PSI Pressure Switch onto the charge pipe going to the throttle body and then hook up the Pressure Switch in between the +VE side of my ignition coil so that if by some chance it sees 8 PSI (overboost), the normally closed pressure switch opens and cuts off the spark / ignition.

I think this will be a nice safety measure and I do not see why it would not work. Anyone care to chime in? </TD></TR></TABLE>

any adequate tuning solution on the market for hondas has this built into the EMS.

 

I am going to be using Crome so I am not sure if it supports something like that - but if it does not, here is a diagram of what I came up with ...



You guys think this will work well?

 

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

any adequate tuning solution on the market for hondas has this built into the EMS.</TD></TR></TABLE>

+2 Almost any EMS has boost cut now days.

 

Hmmm, I actually thought that CROME did not have boost cut but I just looked on google and their site - it does. So how does the boost cut work on on that? Does it cut off the spark?

 

crome has boost cut

 

Great because thats what I am gonna be using

 

in order for that to work, you would need to make the switch send a ground to the positive side of the ign coil.


errrr..... perhaps .... use the switch inline with the positive side of the coil... which i now see, this is what you had planned on.

i belive oem coils are getting 12v power straight from the ign switch, so if you did it like the 1st suggestion i made, you might weld the terminals together if you sent it a ground burn wires up, pop fuses.. etc...

i belive the 1st suggestion would work, if you had an aftermarket external coil

 

Yeah I see what you're sayin ... makes sense and yeah I got an external coil but I am scrapping this "project" because I am gonna be tuning with crome and everyone told me it already has boost cut .

But I guess this would be useful for someone using a FMU or something and on EMS for tuning boost lol

 

Yea crome has boost cut,but your idea would have worked.I saw it awhile ago on a turbo 240sx site.It's useful for alot of other cars owners that don't have it as lucky as us honda guys that have ems options as cheap as 150 or free.