Well, I'm about to get my car tuned tomorrow with my Apexi Power FC at GodSpeed. I do have a few questions. My set up is available through my HT Garage link in my sig.

1) How high should I rev my set up? The cams are said to make power from 1500-8500, but doesn't fall off right after 8500. I was thinking 9500rpm.

2) I will be road racing the car, so naturally, I want a nice mid range. Should I mess with the cam gears, or just leave them where they are? (I'm almost positive they are already degreed).

3) Whats a safe A/F ratio to shoot for? I am more concerned with reliabilty than power, as I was happy with my previous bolt-on ITR.

4) What kind of power numbers am I looking at? Will I break the magical 200whp mark?

Thanks,

Andrew

PS: Search ****'s, I searched, and didn't find much info regarding dyno sheets. Basically no info on the Power FC, and, I am too lazy to search the rest.

 

Once your dyno sheet is produced your tuner will know how to work with the motor and how to tune it.
and then you will have to change yourself to match the power output.

the tuner might be able to make small changes but the motor will be basically determining how you should drive. Unless you built it to your specs.

A/F, if your tuner knows how to tune then don't even worry.

But be sure to post up the charts later.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stealth 95 GS-R &raquo;</TD></TR><TR><TD CLASS="quote">4) What kind of power numbers am I looking at? Will I break the magical 200whp mark?</TD></TR></TABLE>
If you are looking for "#'s"....
200 peak whp is not impressive if everything below it in the plot looks like crap.

I would be more worried about gains from your last time on that dyno and gains while you are on the dyno.

 

Keep the RPM's down if its a track car. No need to rev it to the moon - keep them at stock limit and get 'area under the curve'

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Willard &raquo;</TD></TR><TR><TD CLASS="quote">
If you are looking for "#'s"....
200 peak whp is not impressive if everything below it in the plot looks like crap.

I would be more worried about gains from your last time on that dyno and gains while you are on the dyno.</TD></TR></TABLE>

I've never been on the dyno before (with an Integra). I just bought the car. I know exactly what you mean about under the curve, and thats kinda why I asked about tuning the cam gears. I hope these cams can give a great midrange. I hear they compare to Toda B's, I just hope they don't require a lot of compression. When I talked about 200whp, I mostly was referring to the dynos I see on here where good power across the board goes with 200whp.

Thanks for the help guys!

EDIT: .RJ, thats exactly what I was wondering! Should I/can I use the cam gears to move that 8500rpm power peak a little lower and get a nice fat power band?

 

1) I would take it as high as the cams can go. Even for a track car, its nice to have a longer powerband. I have a feeling though, that the Crane 2 cams wont hold power past 8500, so you will probably be fine with the stock limiter.

2) Generally, the more you advance the intake cam, the powerband increases a little throughout the RPM range. You may have to retard the exhaust cam to help see those affects. Its all about tuning though, every motor is different and one motor may get the best midrange from a +3/-3 combo, while one will make them most on -1/0. Start at 0/0 and tune accordingly.

3) I tune my motor for 13:1. Many N/A tuners tune for 13.5:1, but for my car which sees about 50% of its engine life on a track, I want to have a little cushion of safety.

4) I would not be concerned about your peak #'s if you're so concerned about question 2. You can always take away some midrange and help increase your topend using your camgears, so its hard to have the best of both worlds.

And please post the graph(s) when you are done

 

perfect, thanks for your help!