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As some of you may have seen my last dyno thread, I pulled 183whp and 146tq. Andreas, who's been helping me with this motor the whole time, thought it could make more with a bit of tuning.
Today we went down to Lujan Motorsports. First thing I did was bring the timing back down from 19 degress to 17 degrees and did a run. That got me 188whp, and 148tq. I gained another 5hp from messing with the timing. Both VVL solenoids turn on at 4600rpm.
Second run all we did was change VVL solenoids to come on 200rpm sooner, other than that, nothing else was changed. This run got 190whp, 152tq.
Third run the fuel pressure was raised from 37psi to 42psi. this made 193whp, 155tq
Fourth run, fuel pressure was raised a little more to 45psi, not too much different from the third run, tq went up by half a hp, and tq dropped a bit.
I have to say, I am very pleased with the results. Thanks to Andreas Miko and his mad crazy tuning skillz he was able to squeeze out 10 more hp out of my car. He says with a few more minor things I have lined up, I will be able to get over 200whp...and on sr16ve cams
Here is the third dyno run, it was the best one, so its the only one I'm putting up for now. I'll scan the rest on Monday and post links.
way to go serban. those are some bad ass n/a nissan #s. tunning makes a world of a difference huh. enjoy your new found 10 whp and extra 9 foot pounds of torque !
What's with that huge jump then drop in power at 4500?
Thats the TQ line, it just looks like that because the way the graph was printed out. TQ ranges from 100-160, hp is from 50-200, so the TQ line looks way out of proportion.
What's with that huge jump then drop in power at 4500?
Its not a huge jump its a magnified Tq curve, it starts at 100-160 but it is realy between 120-140 on the graph. If the Tq graph started at 50 and went to 200 like the HP side it would look smooth.
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Different dyno different day. Did you do a run with it just as it rolled off the previous dyno? Not trying to be an jerk but we all know there are small changes from one dyno to the next. Also, changing the VVL point will not change the total HP. Clearly some of what you are seeing is just run to run difference (it is a little hard to tell because I don't knwo how many pulls you did). How many pulls did you do in that tuning session. I have done more then 20 pulls in a day on my VE. Those small changes happen. Nice numbers in the end. 190+whp is very good.
Different dyno different day. Did you do a run with it just as it rolled off the previous dyno? Not trying to be an jerk but we all know there are small changes from one dyno to the next. Also, changing the VVL point will not change the total HP. Clearly some of what you are seeing is just run to run difference (it is a little hard to tell because I don't knwo how many pulls you did). How many pulls did you do in that tuning session. I have done more then 20 pulls in a day on my VE. Those small changes happen. Nice numbers in the end. 190+whp is very good.
We only made 4 runs thats all the money Serban had to spend. The first run was set back to 17 degrees where I had set the timing, Serban played with the timing and moved it up to 19 degrees for no reason which we all know is way to hot timing for a VE on JWT comp with pump gas. With the timing at 17 degrees you could feel the car running stronger up top on the way to the dyno so I can say with confidence we gained a good bit of power from going back to 17 degrees where I had originally put it. Even the exhaust note of the car was diffrent at 17 degrees vs 19 degrees.
The second run I decided to bring the switch over point down 200 RPMs becasue we were loosing HP in the mid range at the cam switch over point. We could have made a little more mid range power if we could have switched the cams over at 4400 RPMs but thats as low as we could go with our RPM selecter. The power increase from 188hp to 190 hp just happened from a run to run diffrence.
The third run was set to 42 PSI fuel presure becasue the car was running a little lean in my opinoin and that made 193.61 HP with 156 Tq.
The third run was a slight FP increase to 45 PSI and it made a little more HP 193.66 and 155 Tq. that was no real change to mean anything. At the end of the day I moved the FP to 43 PSI and was happy with the results.
Last edited by Andreas Miko; 01-16-2005 at 11:37 AM.
Hold up, so your telling me you ran that strong and your still on the stock sr20ve cams? Wouldn't that bring you over 200whp if you change the cams to the 16ve's. If this is all true then I am very happy I'm going to go with a VE.
Hold up, so your telling me you ran that strong and your still on the stock sr20ve cams? Wouldn't that bring you over 200whp if you change the cams to the 16ve's. If this is all true then I am very happy I'm going to go with a VE.
The car has the regular SR16VE cams. The cams are out of the 175 HP motor.
We only made 4 runs thats all the money Serban had to spend. The first run was set back to 17 degrees where I had set the timing, Serban played with the timing and moved it up to 19 degrees for no reason which we all know is way to hot timing for a VE on JWT comp with pump gas. With the timing at 17 degrees you could feel the car running stronger up top on the way to the dyno so I can say with confidence we gained a good bit of power from going back to 17 degrees where I had originally put it. Even the exhaust note of the car was diffrent at 17 degrees vs 19 degrees.
The second run I decided to bring the switch over point down 200 RPMs becasue we were loosing HP in the mid range at the cam switch over point. We could have made a little more mid range power if we could have switched the cams over at 4400 RPMs but thats as low as we could of with our RPM selecter. The power increase from 188hp to 190 hp just happened from a run to run diffrence.
The third run was set to 42 PSI fuel presure becasue the car was running a little lean in my opinoin and that made 193.61 HP with 156 Tq.
The third run was a slight FP increase to 45 PSI and it made a little more HP 193.66 and 155 Tq. that was no real change to mean anything. At the end of the day I moved the FP to 43 PSI and was happy with the results.
Exactly. Didn't want people to think that switching the cams earlier gains hp up top. He is lucky to have someone like you who can get so much done with so little time on the dyno. Good numbers.
Were the fuel pressure changes made with the vacumm connected or without. Isn't stock FP 43psi without vacumm, why was it set so low originally?(If it was set without vacumm)
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Were the fuel pressure changes made with the vacumm connected or without. Isn't stock FP 43psi without vacumm, why was it set so low originally?(If it was set without vacumm)
So you got about 3hp by running 42psi at idle? Just wondering, Thanks.
Every car is diffrent, Steve Foltz had to lean out his fuel mixture to gain WHP. Steve Foltz also had one of the first VE ECUs from JWT, Serban has the second batch of JWT ECUs that were retuned.
Please also note that the JWT ECUs that we are all getting were all done on stock VE cams.
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he was able to squeeze out 10 more hp out of my car. He says with a few more minor things I have lined up, I will be able to get over 200whp...and on sr16ve cams 
