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ssac w 2.5 (blue) vs custom 4-1 (red). test done w N1 cams
N1 cams, straight up (red) vs +4/-4 (blue).
the numbers are just for comparisons, i didnt tune these runs. also dont mind the afr, it seems as though the slip fit is leaking a bit causing the wack afrs.
and just for refrence something is not right with my car.... something since i was on the dyno last is holding me back about 10whp... this chart shows what im talking about
this is a chart of the N1s with ssac vs the sr16 cams with the ssac. the N1s are the lower runs... now i need to find out what going on. so as you can see the car should be making more power. this was a dyno from before i put the valve springs and cams in. its from a few months ago. now the n1 dyno is as of a few weeks ago, and so somehting in that time frame is the cause?? this dyno reads 5% low compaired to a dynojet (ive tested this), so sr16 cams made 197whp back then.
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Last edited by coryb13ser; 09-22-2007 at 08:23 PM.
Should you really hold the comparison as truth, considering you used two different dynos, on two different days? Atmospheric conditions, as well as different dyno hardware will always yield different results, IIRC.
Should you really hold the comparison as truth, considering you used two different dynos, on two different days? Atmospheric conditions, as well as different dyno hardware will always yield different results, IIRC.
what are you talking about? all numbers are in SAE which account for atm, temp and other changes... both comparisons are on the same dyno. i have one showing that N1 make more power than 16. and another comparing the N1 run vs my old sr16 set up. however n1s still not as much as i made with 16s before. so something has changed other then cams/headers and dropped my power...
Last edited by coryb13ser; 09-19-2007 at 11:38 AM.
If you have a exhaust leak it's prob whats killing your #'s because it's really killing the A/F numbers lol looks like it's going to blow at those #'s.
If you have a exhaust leak it's prob whats killing your #'s because it's really killing the A/F numbers lol looks like it's going to blow at those #'s.
i konw the afr is right because with the old header it was a steady 13.7-8. then a few days later once i put the header on its now all crazy, it explaines a lot. and i know its leaking.
also i think that with the slip fit leaking i will loose power because then the collector isnt seeing the same volume and in turn loosing velocity. idk im going to try and weld the header into a 1piece. but that still doesnt explaine the lose since my old graphs.
and ofcourse cam timing, dist timing and all are in check.
Did you ever test the N1s with your old header? Maybe you should put it back on and see if that makes a significant difference. Your custom header is badass but unless you address the leaks you can't rule it out as the problem. Who knows, after you get your airflow in check and you still have a noticeable loss it might be time to think about upgrading to 370 cc injectors or maybe upgrade your fuel pump. You do have an AFPR, right? If not maybe that's all you will need as well as fixing the leaks. Just a thought.....
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i konw the afr is right because with the old header it was a steady 13.7-8. then a few days later once i put the header on its now all crazy, it explaines a lot. and i know its leaking.
also i think that with the slip fit leaking i will loose power because then the collector isnt seeing the same volume and in turn loosing velocity. idk im going to try and weld the header into a 1piece. but that still doesnt explaine the lose since my old graphs.
and ofcourse cam timing, dist timing and all are in check.
I remember back in the day when I had my Hotshot header on my old SE-R. The thing was a monster I couldn't launch it anymore the same way I use too. My 1/4 mile times went down a bit and my mph went up. One day I went back to the track to race a friend I knew I should be able to beat but couldn't my car got so slow and I couldn't figure it out. I checked the header a week later and found a crack at the collector weld!!! I couldn't belive it killed so much power. I went from a 14.7 to 16.0 because of that freaking crack. Can you put a tighter spring on it maybe to close it up more.
Did you ever test the N1s with your old header? Maybe you should put it back on and see if that makes a significant difference. Your custom header is badass but unless you address the leaks you can't rule it out as the problem. Who knows, after you get your airflow in check and you still have a noticeable loss it might be time to think about upgrading to 370 cc injectors or maybe upgrade your fuel pump. You do have an AFPR, right? If not maybe that's all you will need as well as fixing the leaks. Just a thought.....
That's what I was writing last night, but he dynoed the 16ve cams and SSAC2.5. Then he changed to N1s and dynoed with the 2.5. Then redyno-ed it N1s and custom header.
Have you checked the manifold for blowby? Since I recently broke down my VE I noticed that the pcv hose was giving me a pretty steady supply of oil particularly in cylinders 1 and 2.
That's what I was writing last night, but he dynoed the 16ve cams and SSAC2.5. Then he changed to N1s and dynoed with the 2.5. Then redyno-ed it N1s and custom header.
Have you checked the manifold for blowby? Since I recently broke down my VE I noticed that the pcv hose was giving me a pretty steady supply of oil particularly in cylinders 1 and 2.
The oil going out the valve cover via the PVC into the plenum is not blow by. When you let off the gas the in high RPMs the vacum from the plenum opens the PCV valve and sucks oil vapor into the plenum. This happebs on all motors and is desined to do so.
The reason why there is more oil around the 1 and 2 cylinders is because the inlet for the plenum from the PCV is between those to cylinders. All VVL motors that I have opened look like that.
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The oil going out the valve cover via the PVC into the plenum is not blow by. When you let off the gas the in high RPMs the vacum from the plenum opens the PCV valve and sucks oil vapor into the plenum. This happebs on all motors and is desined to do so.
The reason why there is more oil around the 1 and 2 cylinders is because the inlet for the plenum from the PCV is between those to cylinders. All VVL motors that I have opened look like that.
Well I only opened one. Sorry Cory I don't have anything more for you.
Well I only opened one. Sorry Cory I don't have anything more for you.
I dont know what to think either of this situation.
I do know a leak in the exhaust will not make the car run lean. I will give a lean reading because air is being pulled into the system during a pull on the dyno so it appears to be running lean because of the air diluting the gases. A cloosed loop pull goes directly to the map on the ECU.
What he need to do is get it on the dyno.
Set the TPS at .46 ( my favorite setting)
make a pull. If the car appears to run lean like it shows on the graph then use the regulator to richen up the mixture. Do so in 5 PSi incraments and see if the top end goes up.
Also as I was looking at the post with the header. The transistion of the hcoolector seems to be very quick and when going for bi hp you need a transition in the collector with less angle to it.
I feel this car will make about 205 WHP it just need some playing around with on the dyno.
I have also found that the N1 cams like alot less timing on the top check and see if you have the correct map.
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