Dyno: crawford plenum vs motordyne spacer
#21
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Originally Posted by slowxturtle
i see.. I have the popcharger sitting on my desk and the 1/4" motordyne spacer arriving tomorrow to install. I wonder if any of it actually increases significant HP. Hope all of this it not for nothing.
check out my thread about the 1/4" spacer install help.
https://my350z.com/forum/intake-exhaust/120574-motordyne-plenum-spacer-install-help-and-review-read-this-if-you-need-help.html
Harv
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In regards to the yellow Z gaining 15 HP, it goes to show how important it is to do all the runs at the same engine temperature. I don't think we got that on that dyno day (I was the 2nd one on the dyno).
I know that Church Automotive will do every run at the same temperature. That's what we did when we compared a 1/4" spacer + stock plenum vs. Crawford V5 in one of my previous post. We ran the car with the same tank of gas, same coolant temp, same dyno operator. We didn't even take the car off the dyno, the install was done while it was still hooked up.
Anyway, with that comparison, I got pretty close to the same results that you did.
Edit: we also did ECU resets with my runs at Church with both setups, and it didn't make any difference on my car. Maybe because the ECU was already running in the most aggressive mode.
I know that Church Automotive will do every run at the same temperature. That's what we did when we compared a 1/4" spacer + stock plenum vs. Crawford V5 in one of my previous post. We ran the car with the same tank of gas, same coolant temp, same dyno operator. We didn't even take the car off the dyno, the install was done while it was still hooked up.
Anyway, with that comparison, I got pretty close to the same results that you did.
Edit: we also did ECU resets with my runs at Church with both setups, and it didn't make any difference on my car. Maybe because the ECU was already running in the most aggressive mode.
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Originally Posted by HarvesterUT
check out my thread about the 1/4" spacer install help.
https://my350z.com/forum/showthread.php?t=120574
Harv
https://my350z.com/forum/showthread.php?t=120574
Harv
#25
Originally Posted by GQ 350z
Z boy, thanks for taking the time to do this. This is somewhat startling to me, but how much could you attribute the 'down time' to the dyno gains?
Motordyne time and time again outperforms the crawford unit (based on independent as well as his own testing). As a current Crawford Plenum owner, I'm not sure what to think b/c I havent installed mine yet. Also, doesnt the Z's ecu adjust itself after every WOT run? Basically giving you more power the longer you are on the dyno?
ravi
Motordyne time and time again outperforms the crawford unit (based on independent as well as his own testing). As a current Crawford Plenum owner, I'm not sure what to think b/c I havent installed mine yet. Also, doesnt the Z's ecu adjust itself after every WOT run? Basically giving you more power the longer you are on the dyno?
ravi
i've read about that...the ecu supposedly allowing more power after each wot, but my previous pulls were done on a dynojet, too, and i am a wot junkie. i can't tell you how embarrasing it was to get lower numbers than guys with just a poopcharger on 3/26.
ps: another thing i don't understand is people say in order to get good dyno numbers, the oil temp, etc, has to be up. well, my temp was certainly up when i pulled with the crawford cuz i had just recently arrived after driving 1.5 hrs from san diego
Last edited by Z BOY; 05-14-2005 at 12:15 PM.
#26
Originally Posted by E K
In regards to the yellow Z gaining 15 HP, it goes to show how important it is to do all the runs at the same engine temperature. I don't think we got that on that dyno day (I was the 2nd one on the dyno).
I know that Church Automotive will do every run at the same temperature. That's what we did when we compared a 1/4" spacer + stock plenum vs. Crawford V5 in one of my previous post. We ran the car with the same tank of gas, same coolant temp, same dyno operator. We didn't even take the car off the dyno, the install was done while it was still hooked up.
Anyway, with that comparison, I got pretty close to the same results that you did.
Edit: we also did ECU resets with my runs at Church with both setups, and it didn't make any difference on my car. Maybe because the ECU was already running in the most aggressive mode.
I know that Church Automotive will do every run at the same temperature. That's what we did when we compared a 1/4" spacer + stock plenum vs. Crawford V5 in one of my previous post. We ran the car with the same tank of gas, same coolant temp, same dyno operator. We didn't even take the car off the dyno, the install was done while it was still hooked up.
Anyway, with that comparison, I got pretty close to the same results that you did.
Edit: we also did ECU resets with my runs at Church with both setups, and it didn't make any difference on my car. Maybe because the ECU was already running in the most aggressive mode.
Last edited by Z BOY; 05-14-2005 at 12:32 PM.
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Here was my graph from the Church automotive dynapack. I plotted 3 runs with each setup.
Again, the dynapack reads higher. At powertrain dynamics' dynojet on 3/26 with you guys, I got 248 SAE and 259 uncorrected, running the Crawford V5 and 1/4" spacer at the same time (5AT G35 coupe).
Again, the dynapack reads higher. At powertrain dynamics' dynojet on 3/26 with you guys, I got 248 SAE and 259 uncorrected, running the Crawford V5 and 1/4" spacer at the same time (5AT G35 coupe).
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Originally Posted by GQ 350z
Z boy, thanks for taking the time to do this. This is somewhat startling to me, but how much could you attribute the 'down time' to the dyno gains?
Motordyne time and time again outperforms the crawford unit (based on independent as well as his own testing). As a current Crawford Plenum owner, I'm not sure what to think b/c I havent installed mine yet. Also, doesnt the Z's ecu adjust itself after every WOT run? Basically giving you more power the longer you are on the dyno?
ravi
Motordyne time and time again outperforms the crawford unit (based on independent as well as his own testing). As a current Crawford Plenum owner, I'm not sure what to think b/c I havent installed mine yet. Also, doesnt the Z's ecu adjust itself after every WOT run? Basically giving you more power the longer you are on the dyno?
ravi
#30
so they made 15whp on a yellow 35th ann?that pretty impressive but hasent nissan revised the new 300hp engine plenum?so even whit that revised plenum they shoed 15whp?mmm hard to beleive
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I just installed my motordyne 1/4" spacer and jwt popcharger. Sounds great! So much more beautiful tunes coming from the engine. When installing the jwt popcharger, I noticed it didn't line up all that well, nor did the heat shield. Also, didn't seem like any oil was on the filter, so my friend sprayed some more k&n oil on it. so now it's rainbow blue and red.
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matt I think I told you this, but I honestly think your gains were from the cool down period.. You gained 5whp with the spacer swap and 2 hours of cooling, and sheldon/FLZ_boy gained 15whp just from cooling!!!
you should have kept ur kinetix plenum But I'm glad you didn't I just love how it always stays so nice and cool!!!!!!!
you should have kept ur kinetix plenum But I'm glad you didn't I just love how it always stays so nice and cool!!!!!!!
#36
Originally Posted by DIE DIE
matt I think I told you this, but I honestly think your gains were from the cool down period.. You gained 5whp with the spacer swap and 2 hours of cooling, and sheldon/FLZ_boy gained 15whp just from cooling!!!
you should have kept ur kinetix plenum But I'm glad you didn't I just love how it always stays so nice and cool!!!!!!!
you should have kept ur kinetix plenum But I'm glad you didn't I just love how it always stays so nice and cool!!!!!!!
ps: do you know how long sheldon waited btwn the first and second set of runs? 4 HOURS!!! first set around 1045, second set 1445.
Last edited by Z BOY; 05-15-2005 at 12:47 AM.
#37
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I just installed the spacer as well and I was wondering if it was necessary to reset the ECU. The CEL didn't come on after my install so I didn't bother reseting it.
On a side note: Currently I only had the pop charger before this and after driving it and noticing what little bit of HP that I got, I'm definately hooked. I think all other mods will have to take a back seat now and just do perf mods.
On a side note: Currently I only had the pop charger before this and after driving it and noticing what little bit of HP that I got, I'm definately hooked. I think all other mods will have to take a back seat now and just do perf mods.
#39
Originally Posted by DIE DIE
matt I think I told you this, but I honestly think your gains were from the cool down period.. You gained 5whp with the spacer swap and 2 hours of cooling, and sheldon/FLZ_boy gained 15whp just from cooling!!!
you should have kept ur kinetix plenum But I'm glad you didn't I just love how it always stays so nice and cool!!!!!!!
you should have kept ur kinetix plenum But I'm glad you didn't I just love how it always stays so nice and cool!!!!!!!
Last edited by Z BOY; 05-15-2005 at 01:41 AM.