Thread: Went to the dyno last night, tell me what you think

Evlnxr, from looking at all the dynos it seems that the N1 cams -( FS3) have held their own very well at that dyno day. Do you feel this statement being correct.

Also all those guys with Fujis headers and so on. Get a 20V header and put it on. Its about the best thing you can do.

Agreed, for the N1 profile to still make 135 to 140kw at 8500 rpm on 2 cars is pretty good, and the car that made 140 had fuji's with the secondaries chopped short to improve high rpm power. And the tuning on mine is still way off for some reason, will sort that out on thurs.

I think the 20v headers are ok for high power, but they are not readily available, not sure what nissan would charge for new ones, so prob not something too many others will try.

Im going to be making some headers as soon as i can get some manifold plates laser cut, and based on how the 20v headers are working for high power, im going to make them very large 4 into 2 into 1 with a big collector to 3". Will prob ask clint to try these for me on his car.

Got a price from Nissan NZ last year on 20V headers, around $2,400 NZD from memory!

Chopping the Fuji secondaries down to about 16 inches total length seems to be the next best thing, enables the car to make power to redline. Standard Fujis cause puffing out in the mid 7,000rpm range.

My experiment with the Burns collector welded onto the Fuji secondaries was a bit of a failure, it appeared to kill exhaust flow as the whole fuel map went rich and voltage through the MAF reduced (flowing less air). I think I spec'd the venturi too small at 2.25"

How about a Freak Header wouldn't that be the best option

after watching the vids the 123rwkw stock 20v makes sense now as it had the cats removed. i was thinking, damn thats a lot of power for a standard exhaust, but with no cats it makes sense. would have gained 3-5kws just from that i reckon. what did the other 20v get? also what did the car with the 16ve cams get?

The power figures I got with the Franklin S4's was crap. Nothing to do with the cams though I feel, you all know how much these engines love a free flowing exhaust and my 2.5 "super quiet" (yet highly restrictive) rear muffler was killing flow in a big big way.
I was impressed with the power Adrian got on the N1 cams, however that is a tried and true method of extracting power from these engines, and a few of us are all about unlocking the keys to getting more power.

Twas a great day to learn new things and quite a few of us have uncovered a few quirks and ideas that we want to try which we all feel is going to help us a lot.

Did I mention exhaust? GET A BIG EXHAUST!! Pity our country has exhaust laws that give us a 92dB limit... at 4000rpm!
What have you guys found over there that keeps these 3" systems super super quiet yet keep flow?

Don't know how I missed this. Subscribed.

its 4500rpm for vehicles with variable valve timing james

I will be making some 20V copies soon. Will be talking to one of our local manufacturers and give him a set of OEM 20V extractors. Would you guys want it to be exact or what about the collector?

3" collector