OK quick question......well maybe not quick....actually 2 part question
Yes I've searched........

For starters I'm wondering what the optimal fuel pressure would be for a 95 JDM H22a motor with just an intake and exhaust???

Secondly same question....with a couple gallons of 116 octane?????

(No I don't have a wideband 02, and at this moment cars not going to a dyno)
so I'm just wondering what your guys thoughts are.....

little help from the prelude boyz please

 

helms says the fuel pressure should be around 47-54 psi for a 97 lude. since you're running obd1, the number should be a little lower

not sure if that helps at all...

 

97+ Prelude will have much higher pressure due to running smaller injectors
so no you are of no help! LOL j/k
thanks for the bump

 

HHHHHHHhhhhhhheeeeelllllooooooooo......... anyone there??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H22EKHATCH &raquo;</TD></TR><TR><TD CLASS="quote">HHHHHHHhhhhhhheeeeelllllooooooooo... ...... anyone there??</TD></TR></TABLE>

nope

 

Why would you run 116 octane fuel on a car with only an intake and exhaust. The ECU isn't tuned for it, nor does your motor need it.

 

I advanced my timing, a little, the car pulls much harder but don't want any detonation..... my boy has some 116 in his backyard so I cant resist playing, I'm wondering if anyones been able to make power by lowering fuel pressure advancing timing and countering any possible detonation with the high octane

 

I may be wrong but doesn't the JDM h22 take octane 99?

 

99? who the hell says that? they wouldn't make a stock engine need 99 octane. It requires premium fuel; which is 91 for some of the country and 93 for me.

 

Nobody will be able to tell you for sure, because nobody has ever really dyno'd the differences, but if it were me I'd bump the timing no farther than 17 degrees, leave the fuel pressure alone, and leave the high octane alone. IF you insist on trying the higher octane make sure its not leaded.

 

116 octane in a stock H22 would run worse wouldn't it? With low compression and no boost, wouldn't the burn rate be all out of whack?

Just a though, I could be way off base.

 

Fuel pressure won't vary by much by using higher octane gas if at all... So go by stock numbers, the additional octane gas is just HARDER to ignite. You won't use any more of it.

 

this setup=ghetto tune

get an EMS

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iwubmybb4 &raquo;</TD></TR><TR><TD CLASS="quote">I may be wrong but doesn't the JDM h22 take octane 99? </TD></TR></TABLE>
Japan's octane system is rated on a different system compared with the US's system. 99 octane in Japan is around 93-95 (just an estimate) on the US scale, better, but not a hell of a lot better.

Dan

 

dont waste your poor friends c16

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">this setup=ghetto tune

get an EMS </TD></TR></TABLE>

YUP.... The perils of being broke
on that EMS are you buyin if so I'll take 2 and I'll bill you on the Dyno time j/k

Conclusion--It doesn't seem there will be any benifit....I'll dead this thread myself LATA......

p.s. I was just wondering???? thanks for replies

 

The jdm H22a takes 98 octane stock.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yOnKiNaToR &raquo;</TD></TR><TR><TD CLASS="quote">99? who the hell says that? they wouldn't make a stock engine need 99 octane. It requires premium fuel; which is 91 for some of the country and 93 for me. </TD></TR></TABLE>

It's a JDM h22. It uses japanese gas. Their octane rating system is different, as said above. IIRC they have 100 octane (their rating) at the pump over there.

 

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

It's a JDM h22. It uses japanese gas. Their octane rating system is different, as said above. IIRC they have 100 octane (their rating) at the pump over there.</TD></TR></TABLE>

98 ron

 

1) Fuel pressure should be set at stock, you could lower it 1-2 psi to compensate for how rich the stock ECU runs the car without risk of damage if timing is at stock.
2) There is no reason to run high octane on that setup, your car will run worse and you're wasting money on expensive gas.

C16 is actually 118 octane as well as being leaded. While I've had numerous cars running stock O2's and leaded gas and never had a problem, there is potential to mess up your O2 and you'll also ruin your catalytic converter (if you have one).

If it's really hot and/or you have the timing more than 3 degrees advanced, I'd suggest running unleaded 101-103 octane and leaving the fuel pressure at stock.