Hi,

I'm such a noob I don't even get the S2000 until next week (Black on Black 01). I did a search on modding and found this article:

http://www.autospeed.com/cms/A_0911/article.html

I am in Brisbane Australia and Bob Ramano has a very good reputation, he has a lot of experience with turbo MR2's and WRX's and I even saw a carby Cosworth put out over 200RWHP on his dyno.

In the article it says that the S2000 runs way too rich at WOT from the factory. The usual low tech way to adjust WOT AFR is to put on an adjustible fuel pressure regulator and tune it. I see that B&M make and FPR for the S2000.

Is an adjustibale FPR a viable way to go in this high reving engine or is it just asking for a meltdown? Completly replacing the ECU seems like overkill to me to fix such a simple problem. Will the stock ECU handle a change in fuel pressure?

If the S2000 is tuned so rich surely leaning it out a bit will give you a power gain without any other mods?

Does the S2000 run rich to accomidate bad fuel and preserve the engine?

 

I can see the logic behind this.
High strung motor, better to have it run rich than lean.

I will keep it as is.
Honda Engineers knows best for S2000.

 

All Honda's tend to run rich. This is to prevent detonation from crap fuel that may be put into them. The easiest way of sorting this is to get an Apex'i V-AFC and sort it that way. The problem with this is that your Honda ECU will notice the changes and rectify them accordingly. You'll need to install an ECU reset switch that allows you to turn the ECU backup off so that everytime you turn off your ignition, you ECU forgets what it learned and is happy with the settings its getting. It takes about 300miles (500Kms) for it to learn. This is probably why they used the MoTec ECU. Whats the octane rating of the fuel over there? I imagine it'll be similar to us in the UK with 95, 97, and 98+ being availible? If so this is extremely good news, as the high quality fuel will prevent detonation and make your car run loads better

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lukep6470 &raquo;</TD></TR><TR><TD CLASS="quote">Hi,

I'm such a noob I don't even get the S2000 until next week (Black on Black 01). I did a search on modding and found this article:

http://www.autospeed.com/cms/A_0911/article.html

I am in Brisbane Australia and Bob Ramano has a very good reputation, he has a lot of experience with turbo MR2's and WRX's and I even saw a carby Cosworth put out over 200RWHP on his dyno.

In the article it says that the S2000 runs way too rich at WOT from the factory. The usual low tech way to adjust WOT AFR is to put on an adjustible fuel pressure regulator and tune it. I see that B&M make and FPR for the S2000.

Is an adjustibale FPR a viable way to go in this high reving engine or is it just asking for a meltdown? Completly replacing the ECU seems like overkill to me to fix such a simple problem. Will the stock ECU handle a change in fuel pressure?

If the S2000 is tuned so rich surely leaning it out a bit will give you a power gain without any other mods?

Does the S2000 run rich to accomidate bad fuel and preserve the engine?</TD></TR></TABLE>

On AEM's vehicle which only had an intake and their ecu, gains were ~12-18whp after tuning. You can figure out if that's worth it or not

 

I had a friend that worked in one of the labs at BP in Brisbane and they never found a batch of Shell Optimax locally that was under 100!

 

Cant argue with that! Hope its the same over here, thats all I use now.

 

From what other people have said that article is not so trustworthy. Whilst general concensus is that some good gains can be made by proper tuning, they do not agree with the claims about changing the exhaust in that article. From what others have said, the initial figures quoted on the dyno were a bit low.

 

Vapor - when you say AEM's ECU - are you talking the EMS? Or do they offer a plug and play ECU as well?

Still getting the hang of S2ks.

 

i believe he means EMS

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GDPzS2000 &raquo;</TD></TR><TR><TD CLASS="quote">i believe he means EMS </TD></TR></TABLE>

yep!

 

I've been to several dyno comps around Brisbane including one on that Dyno and
all the figures have been very low compared to the same car in the US.

Brisbane can have hot and extremely humid weather which seems to hurt boosted and smaller HiPo engines more than the large lumps of cast iron made by Ford and GM. Also none of the dyno tuners here give corrected figures.

The owner of this dyno used to have a 5.0 with all the goodies (edlebrock alloy heads E303 cam, trumpet style injection)that sounded like the end of the world
when he started it and it only got 280rwhp on this dyno. My old 1995 stock 5.0 got
170rwhp which was at least 30rwhp more than all the turbo Toyotas and Nissans
that were there on that day!