Motordyne Plenum Spacer, Discussion, Dyno Info
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Originally Posted by SixFive
Is there any consensus on what the avg gains are - not peak? I keep hearing 8hp are you guys buying that or is it better?
What does crawford show? I think Neffster has shown some dyno's of his crawford plenum and cats + the claims crawford has made. I never heard a soul complain in 2 years that they didn't get what they paid for either but I did just read that someone installed a spacer that they couldn't recognize gains with in thier butt. Could be that the size is 1/4 inch but I don't remember. It's all subjective but while you say you've never seen the backup for the vendor claims, can you show me a dyno where the results come under those claims? I thought the crawford consensus was as high as 14 ponies. Anyone remember what the standard bragging rights for crawford ponies used to be?
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You'll see that the Crawford Plenum and h/f cats gain ~20rwhp. BTW, I did this dyno 1 year ago, which was 8-9 months before there ever was a Florida G35 Club and 8-9 months before Doug ever offered to sponsor us.
This is just one of the reasons why I'm such a pro-Crawford promoter. I bought the Crawford products, independently dyno tested it and found it to work to the advertised gain (within reason). Then Doug later on agrees to sponsor our club and donate a Crawford Plenum and a Billet Oil Cap for our first ever "All Florida Meet" raffle. 
Doug told me when I bought the plenum that with my RT Cats and the V5 plenum (and z-tube) that I should gain ~20rwhp. He said if I added in his headers that my gains should go up to about 40rwhp at redline and the torque would improve much earlier on. Well I just got around to putting the headers on and will soon be able to verify or disprove this claim.
Stay Tuned...
"Central Florida Dyno Day Results Are In"
You'll see that the Crawford Plenum and h/f cats gain ~20rwhp. BTW, I did this dyno 1 year ago, which was 8-9 months before there ever was a Florida G35 Club and 8-9 months before Doug ever offered to sponsor us.
This is just one of the reasons why I'm such a pro-Crawford promoter. I bought the Crawford products, independently dyno tested it and found it to work to the advertised gain (within reason). Then Doug later on agrees to sponsor our club and donate a Crawford Plenum and a Billet Oil Cap for our first ever "All Florida Meet" raffle. Doug told me when I bought the plenum that with my RT Cats and the V5 plenum (and z-tube) that I should gain ~20rwhp. He said if I added in his headers that my gains should go up to about 40rwhp at redline and the torque would improve much earlier on. Well I just got around to putting the headers on and will soon be able to verify or disprove this claim.
Stay Tuned...
Everytime I read GEEPASTA's posts, I am amazed that someone so functionally illiterate can still manage to survive modern society.
Dave
Dave
Last edited by caelric; Apr 2, 2005 at 12:45 AM.
I can tell you after installing the Crawford I felt no need to substantiate a the claims with an independent dyno. I was like the sleeping beast was awoken. There still is no clear winner here. I keep hearing how the spacer does the same exact thing but that is conjecture at this point. Hydrazine claimed 8 ponies for the 3/4, did he not. I expect more than 8 from crawford and if I didn't get it then the spacer is what I'll put in my next car. It hasn't been clearly demonstrated if there is a better choice so it's pretty much still a game of, promote the product you bought and claim everyone else is a moron that spent too much....We need 10 cars on a dyno with controlled conditions unlike scenario the socal group endured.
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Originally Posted by SixFive
...
I never heard a soul complain in 2 years that they didn't get what they paid for either but I did just read that someone installed a spacer that they couldn't recognize gains with in thier butt.
...
I never heard a soul complain in 2 years that they didn't get what they paid for either but I did just read that someone installed a spacer that they couldn't recognize gains with in thier butt.
...
https://g35driver.com/forums/showpos...3&postcount=18
I still haven't seen any dynos of just a plenum before and after. It's always with a bunch of other mods thrown in. Of course headers and cats are going to give nice gains, duh? Someone please show me some independent dynos that display this claimed 15whp by just adding a plenum? They don't exist!
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Oh yea, and the guy from that cast plenum install post I linked, the one saying he could not tell a difference, has a GREAT quote in there
"my butt-dyno is not calibrated to the amount of money i spend on a mod"
Now that is some straight up objective talk right there, my favorite kind
"my butt-dyno is not calibrated to the amount of money i spend on a mod"
Now that is some straight up objective talk right there, my favorite kind
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OK guys,
I know the discussion is about the plenum spacers but could the flame wars be done on a separate thread? Flames predominantly decrease the S/N ratio for technical discussions.
Thanks,
Tony
I know the discussion is about the plenum spacers but could the flame wars be done on a separate thread? Flames predominantly decrease the S/N ratio for technical discussions.
Thanks,
Tony
Who said 15. I said 11-14 ponies - thats up to 6 better than the seeming consensus of 8 hp for the spacer. Great bang for buck but if your getting all high and mighty for saving 200 bucks then you are living off blind faith. When everyone gets past the mine is better routine then and gets some more users, more dyno plots and more analysis then we can have meaningful conversation about what is best in context of one car.
Of course it work DIzz. No one said it didn't work. It hasn't been proven to do anything better, however, and I can't wait to see what come out datawise if we can get a central fla type of dyno day. You guys are so defensive it's quite transparent the competitiveness you all have. You don't have to sell it to me...when it can be shown to add at least 11 ponies then I'll buy it for my next VQ. No one shows 11 ponies by the way that doesn't have other mods for this spacer.. If so please link posts. I don't care what's better, i'll buy it. "It works" is about as useful as a bunion.
Of course it work DIzz. No one said it didn't work. It hasn't been proven to do anything better, however, and I can't wait to see what come out datawise if we can get a central fla type of dyno day. You guys are so defensive it's quite transparent the competitiveness you all have. You don't have to sell it to me...when it can be shown to add at least 11 ponies then I'll buy it for my next VQ. No one shows 11 ponies by the way that doesn't have other mods for this spacer.. If so please link posts. I don't care what's better, i'll buy it. "It works" is about as useful as a bunion.
SixFive,
The aftermarket plenums and Motordyne XL spacer both work well. I have a 3/8 spacer and I'm very happy with the results. Here is some solid information from Bazz from the recent Northern Cali Dyno Day. I think you would agree, his dyno results are very impressive (12 hp increase). His dyno graphs are included in his post.
The aftermarket plenums and Motordyne XL spacer both work well. I have a 3/8 spacer and I'm very happy with the results. Here is some solid information from Bazz from the recent Northern Cali Dyno Day. I think you would agree, his dyno results are very impressive (12 hp increase). His dyno graphs are included in his post.
Originally Posted by Bazz
I waited until the G35 Driver Norcal Dyno Day at Modacar in Livermore, CA to write this because I don't trust my Butt Dyno. I'm glad I waited. The results speak for themselves. Exactly one month ago today I tag teamed with the Norcal Toyota Matrix Club for a Dyno Day on 2/19/05. Current mods on my coupe that day were the Stillen CAI / Z-Tube, Stillen Torque Dampener and 8-Wire Grounding Gear. My best pull of three in 4th gear was 229 HP & 218 Torque.
Today I met up with a great bunch of guys and gals from the G35 Driver and My350Z Norcal club for another Modarcar Dyno Day. The only mod I had installed between then and now was Motordyne's 3/8" spacer coupled with an ECU Pedal Reset done right after the install. WOW...is all I can say! My best pull today was 241 HP and 225 Torque. That's an approximate increase of 12 HP and 7 Torque accross the board that I can attribute to Tony's Spacer. You can see from the charts below that conditions were almost identical weather wise between the two Dyno Days (Cold and Rainy). I can only attribute this increase in HP & Torque to the Plenum Spacer. Casey at Modacar was nice enough to pull up last month's run (pre-spacer) and superimpose the graph's and numbers from todays pull. What I find very interesting is both HP and Torque start higher and finish higher accross the whole pull. No loss of low end torque...No gain of high RPM HP...Just a nice clean gain in both from start to finish.
This, I have to say, is one of the best Dollar vs. HP/TQ Mods you can do. Tony's customer service, packaging and shipping were exlemplary. Not to mention the quality of the spacer and included hardware itself. Can you tell I'm really stoked about this Mod?
Today I met up with a great bunch of guys and gals from the G35 Driver and My350Z Norcal club for another Modarcar Dyno Day. The only mod I had installed between then and now was Motordyne's 3/8" spacer coupled with an ECU Pedal Reset done right after the install. WOW...is all I can say! My best pull today was 241 HP and 225 Torque. That's an approximate increase of 12 HP and 7 Torque accross the board that I can attribute to Tony's Spacer. You can see from the charts below that conditions were almost identical weather wise between the two Dyno Days (Cold and Rainy). I can only attribute this increase in HP & Torque to the Plenum Spacer. Casey at Modacar was nice enough to pull up last month's run (pre-spacer) and superimpose the graph's and numbers from todays pull. What I find very interesting is both HP and Torque start higher and finish higher accross the whole pull. No loss of low end torque...No gain of high RPM HP...Just a nice clean gain in both from start to finish.
This, I have to say, is one of the best Dollar vs. HP/TQ Mods you can do. Tony's customer service, packaging and shipping were exlemplary. Not to mention the quality of the spacer and included hardware itself. Can you tell I'm really stoked about this Mod?