i have a stock 00 GS-R. Im gonna run a CTR intake cam, Supertech Flat face Valves and a mugen(2 layer) head gasket. now the vales bump the comp. up 0.4 and the head gasket ups it another 0.5 giving me an overal 0.9 increase. Is that enough to have to tune beyond fuel pressure?? I know tunig will yeild the most power but if i dont have to then im not. I just want to pep it up a tad without a costly standalone and dyno time..........also, does the mugen head gasket present any clearence issues??

 

I re tune anytime I change to a different air filter, but that's just me.

.9 up in compression I would definitively tune

 

I would have to agree with N20civicB18
I would definitely tune.
Do not adjust the fuel pressure, get Hondata or Crome with a OBD-1 ECU.

But I ran my 1999 GSR with ITR Pistons for about a 1-1/2 on the Stock ECU, no tuning. I did run into trouble in the winter time with error codes. I did get it tuned with a Hondata S300. Runs a ton better.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MR_FIX_IT &raquo;</TD></TR><TR><TD CLASS="quote">i have a stock 00 GS-R. Im gonna run a CTR intake cam, Supertech Flat face Valves and a mugen(2 layer) head gasket. now the vales bump the comp. up 0.4 and the head gasket ups it another 0.5 giving me an overal 0.9 increase. Is that enough to have to tune beyond fuel pressure?? I know tunig will yeild the most power but if i dont have to then im not. I just want to pep it up a tad without a costly standalone and dyno time..........also, does the mugen head gasket present any clearence issues??</TD></TR></TABLE>Well can I ask how you would know how much to bump the pressure if you don't tune?Are you just going to guess and blindly hope for the best?

 

how did you come to the conclusion that the 2 layer headgasket will bump your comp ratio up by .5?? and your valves up by .4?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fkned &raquo;</TD></TR><TR><TD CLASS="quote">Well can I ask how you would know how much to bump the pressure if you don't tune?Are you just going to guess and blindly hope for the best?</TD></TR></TABLE>

wide band

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00Red_SiR &raquo;</TD></TR><TR><TD CLASS="quote">how did you come to the conclusion that the 2 layer headgasket will bump your comp ratio up by .5?? and your valves up by .4?</TD></TR></TABLE>
the specs from the company.....im assuming there general numbers.

 

That head gasket might give you about .2 and the valves are probably about .3

 

well like i said im just looking to pep it up a tad, im looking for 10-15 hp ...

 

retard the distributor.

 

the purpose of that would be?? at most i would be at 10.9:1 on 98 octane i dont think detonation will be a problem

 

obviously you have a thick skull and had your answer before you even asked. So please run your car untuned and see what happens. and i dont want to see a thread on how you ruined this or that. Good Luck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MR_FIX_IT &raquo;</TD></TR><TR><TD CLASS="quote">the purpose of that would be?? at most i would be at 10.9:1 on 98 octane i dont think detonation will be a problem</TD></TR></TABLE>

You are only going to raise your compression to around 10.5:1. Using your wideband you should be able to adjust the fuel pressure if you need more fuel and you can install some new plugs make a full throttle pass, shut down right after and have a look at the plugs to see if there's any detonation/pre-ignition (I doubt there will be). If you ever put bigger cams in there, get a proper tuning system.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Horseofcourse &raquo;</TD></TR><TR><TD CLASS="quote">obviously you have a thick skull and had your answer before you even asked. So please run your car untuned and see what happens. and i dont want to see a thread on how you ruined this or that. Good Luck</TD></TR></TABLE>

i highly doubt i brake anything. I work on quads on a regular basis and i know the basics of air+fuel=power and i know that unless i go above 12:1 comp detonation wont be an issue on pump gas.

my question was, can i bump up the fuel pressure to compensate for the slight increase in compression. I know i dont want to run above 40psi......

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00Red_SiR &raquo;</TD></TR><TR><TD CLASS="quote">

You are only going to raise your compression to around 10.5:1. Using your wideband you should be able to adjust the fuel pressure if you need more fuel and you can install some new plugs make a full throttle pass, shut down right after and have a look at the plugs to see if there's any detonation/pre-ignition (I doubt there will be). If you ever put bigger cams in there, get a proper tuning system.</TD></TR></TABLE>

i will just be running a CTR intake cam........what would u say?

 

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

my question was, can i bump up the fuel pressure to compensate for the slight increase in compression. I know i dont want to run above 40psi......
</TD></TR></TABLE>

Stock is over 40psi, its in the 48-55 range with the vacuum hose disconnected from the regulator.

 

well what the hell am i thinking of..........i thought it was 35 or sumthin....at the fuel filter maybe?? i thought fuel didnt atomize if u ran anything over 40 pounds?? sombody clarify this for me please. Im confused.

 

I re-tune every time I switch to a new exhaust. I have OCD with exhaust I can't keep the same one on for more then 2 months.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MR_FIX_IT &raquo;</TD></TR><TR><TD CLASS="quote">well what the hell am i thinking of..........i thought it was 35 or sumthin....at the fuel filter maybe?? i thought fuel didnt atomize if u ran anything over 40 pounds?? sombody clarify this for me please. Im confused.</TD></TR></TABLE>

The fuel atomizes better at higher pressure but you're worrying about things you don't need to. You can go over 40 psi no prob (obviously). Anything bigger than STOCK cams....ITR/CTR cams are stock cams, you'll need tuning.