Ultra_Nexus

No, you aren't anywhere close.

The maps Honda throw out are ridiculously rich and I do mean into the tens AFR up past 8500. For NA, 13 is what you want. Stoichiometric is 14.7, so you can realise how rich 10 is!

And besides, your assuming you are going to gain magic flow properties with this J's manifold

MB

I have a Js manifold for sale.

Ron, incorrect.

With an intake / J's header / decat you will be lean to the point you are in the 14s for sustained duration in the upper mid range. Seen it several times with my own eyes. With an exhaust system as well you will be too lean and will need the ECU map tweaking.

https://www.s2ki.com/s2000/topic/762...#entry18311637

I also wouldnt be aiming for an AFR of 13, 12.5 would be safer.

ekme

Now to read up on afr...so much to consider

KristianP

MB, any chance you can sort a finance deal on your manifold ;p

10.0 to 14.0 is a huge difference, although with the intake, I would understand having a higher afr due to the volume of air going in. Surly if he was just to fit the header and decat you won't be near those figures?

ekme

I would be looking at just the exhaust manifold and decat to go with my exhaust and ecu for now otherwise I might get a telling off

U9aXy6Dn

I have a PLM header + OEM cat + invidia N1 cat back, so am I correct in thinking i'll need a tune now?

lovegroova

My limited experience relates to Kim's car at the dyno day we had last year where his dyno runs were abandoned by the guys at TDi because of potential damage due to some sort of alchemy problems.

He had the following fitted:
Fujita F5 Intake
DMS exhaust, manifold and decat

zzkamikazezz

Yep, I remember that, I was quite suprised.

MB

You should be ok, it tends to be when you have a combination of breathing mods. With the oem cat and intake you have some restriction to keep things in check. Always best to check though.

MB

I'd expect issues there tbh.