Thread: Sad sad N1 cam dyno results

Your thread says you started out with +5-5 and had realy bad results 160hp or so, then put them at +2.5 -2.5 and made 196hp.

turned out the original install was done incorrectly by a workshop, hence the larger than normal gains in that instance

Instead of "shooting" for a rough A/F ratio, i would tune for what makes the most power everywhere.

the header "4-1 25in long" doesnt mean anything other than being a 4-1 collector and 25" long runners. could be 2" primaries, could be a formed collector. post the full specs of the header and if possible pics. If the header isnt built or spec'd right, then you wont gain power, most likely lose a lot.

Ignition timing. N1 cams and short runner headers are VERY VERY sensitive to ignition timing.

A/F ratio being 1 point off wont affect the whole power curve that much.

I made the header close to the specs you had. mild steel not stepped 1.875" iirc I made the collector myself necks to 2.25" and opens up to 3" 25" primaries. the bad thing is that it goes back to 2.5" exhaust. I'll get pics in the morning. Oh and the cat melted a while back so I gutted it and there is nothing in it. I think that is probably bad. I will replace it with a pipe.

We added timing up top and it liked it. I posted the bin so you guys can look at it.

Man, I wonder what the heck is wrong with these motors. I have tried the same tune others have made 200whp with, and no results.

Have you compression tested your motor?

Dudeman

The bin file you are running is it for a B14? or B13 ecu? It looks crazy if it's a B13 bin. Your better off with the base Calum SR16 bin.

Compression is good. I think its a B13. Whats the difference? I cant find Calums sr16 bin.

Well your bin it mapped to 7400ish after that it's reading the last cell. Your Knock map is all over the place. You should reedit the bin so the knock and the main are the same. Your fuel numbers also look very rich but from what you posted your hitting 13.6ish. Set the FPR back to stock load the calum base ve bin and dial your A/F in to 13.0 for wot and make sure knock and main are the same. You shouldn't have to touch the timing on his bin.

I gotta ask, has anybody else you know with a VE used this particular dyno?

No. I dont know anyone that has dynoed their ve in Arizona other than me. I made 176hp and 140tq on stock cams peak power also held a bit longer 73xx rpms. Not the same dyno but it was the same type and model as the one I am using now. Just a different shop.