Well just got home from my dyno. Mods are 03 G35, Crawford Cats, Kinetix SSV, Alphawerks headers, Vortech with stock pulley. I made 373.2 HP 296.2 TQ. He said the norm setup on a stock car has been showing 330 at the wheels. But my cats and headers put my at 373rwhp. He said the new IM made about 5hp. YES 5HP. Keep in mind this was Rob from Z car garage. This is his second dyno with the new IM and said the other results were about the same. He did say it looks good, but thats about it My tune is very safe. I dont have a scanner but maybe Ill try and get a pick of my sheet.

 

Pic

 

I'm glad I waited.....it seems like others have proven the same thing as of recently

 

Well I sort of had the feeling this was going to happen Steve, but hey it looks great with your ride.
What did he mean by normal setup being only 330hp...not with a vortech added only I hope.

 

Yes Vortech only. He said he has done many cars with just Vortech only and 330 is average. He said my #'s were pretty good without cams or 9lb pulley.

 

imo kinetix seem like homemade stuff especially the front camber A arms....

I doubt they do flowbench testing.. you can pretty much make the manifold yourself using this..



6 2" OD 90 degree tubing
3" ID U bend
a couple flanges
and a couple vacuum bungs.
have a local welder weld up all the pieces you cut

then polish it up with sand paper 120 grit, 600 grit, 1200 grit, 2000 grit, then metal polish.

 

Getting mine dynoed this thur and will keep you posted. Getting 370whp as it is. Wish me luck!

 

That is wierd compared to what I have been reading on the system, Booger, Randy and dfwg35 all got more power than 330whp before they went to the next level.
Looks like I may have to add a few other items to my list before dynoing

 

Hmm, my speculation is looking to prove itself.

I didn't think this plenum would do very well as far as power.

 

My tune was questioned when I was only showing RWHP in the 330's with Vortech SC. Some others might want to jump in, but from you graph it looks like your A/F could be improved. It appears that it is in the 12's.

Would G352NV see and increase in numbers if the same A/F curve was moved into the mid 11's starting at about 3500 rpms and continuing to 6500 rpms?

 

G352NV...

Are you trying to tell us you got 43+HP from just cats & headers. If so, I gotta call a big BS on that. I believe you when you say you are making 373rwhp, but if that is the case, then you probably did not start at 330rwhp stock. Just because that is the average, you cannot assume that is where you started. There is just too much variance in baseline dyno numbers. If you have a good set of headers and cats, you may make 25rwhp at peak. Typically headers don't really make peak HP, they pump up low end torque. My guess is you probably would have been around 345rwhp without those mods.

Barzten1...
Good luck with your dyno!



For the record, I'm now turning roughly 420rwhp on a conservative tune using the SSV and a 3.12" pulley. My question is this... how much power gain are people typically seeing out of the pulley swap?

If the average stock pulley with bolt on mods makes 370-380rwhp, what does the 3.12" pulley with bolt on mods typically make? 40, 50 more hp?

For reference, here are my dyno comparisons (graph 1). We started the day on the old tune... my car was only making 340rwhp! So, the question is can a good tune and a pulley swap wholey account for a 80hp gain at peak by the end of the day?

Second graph is A/F and Boost for the same runs. The air/fuel doesn't actually rise like that at the end of the powerband now, it stays below 11.

The final graph is a comparison between my original 425rwhp run when I first had the Vortech installed. That was pre-SSV and on stock pulley and was tuned to the max. It is compared against the same run from the first graph which is with SSV and post pulley sway and tuned semi-conservatively. Peak is almost identical, but there are significant increase under the curve. Again, question is how much of that is SSV and how much is the new pulley. Keep in mind, they have another 2 or 3 degrees of timing they could take out on my car to make even more power if I wanted to live dangerously.

Not sure if all this info helps. My opinion is the SSV is better than upper plenum replacement pieces... but not by as much as Kinetix claims. Still, if you want a great looking piece and ability to retain your stock strut bar may make it nice enough to justify the purchase even if the mild power gains over plenums do not. Just my .02

 

its kind hard to see the chart but it looks like from 5000rpms to 6500rpms it looks like the a/f is in the mid to low 12's..... I think you should of had thr a/f tuned with mid to low 11's in that rpm range to have a really safe tune

 

I forgot to add I have the Greddy evo2 exhaust. My tune is VERY safe. Rob said it was best that way. He said he could have gotten more HP but hes always looking out for the customer. One trip to the Z car garge and you would trip. These guys know what the hell their talking about. I was VERY impressed to say the least. He took me for a ride in a Vortech car with a 9lb pulley cams and exhaust and that car was FAST! It put down about 430rwhp and felt every bit of it! He couldnt stress enough that HP is just a # and that a good tune would make a car feel stronger then it really was. My throttle is very crisp now and the car feels good. Im sure it wont be long before more results show what mine have. This was his second dyno with the thing and the other results were about the same. The four guys were laughing at the claimed HP. They said its a VERY sweet looking piece but thats about it.

 

actually I was looking at the red line... I think the blue is your current tune right? if it is why is it so rich?

 

In that section its 11.5, thats the highest it got to.

 

Vortech doesn't make a "9lb pulley". All their pullies are rated by size. The stock pulley is 3.33". Other pulleys which will fit the Z are 3.25", 3.12", 2.87", and 2.62". They are not rated by boost because they are used for multiple applications. Which pulley did the car you ride in have, a 3.12" or a 2.87"?

BTW, you/he are correct... a good tune does make all the difference in the world.

 

My bad 3.12

 

BTW I also ride in a APS Z with cams and exhaust. I nearly shat myself! That car was fast! I think he said it had 448rwhp and 415lbs TQ. Man it was fast!

 

Andy, the 81whp gain wasnt all a result of your mods, such as the pulley swap and plenum. The baseline dyno was very "out of tune". Mid 10's on the A/F only only 10 degrees of total advance. That is the reason that car made only 340whp.

If AF was simply optimized, and additional, but safe timing added back in, your car would have dynoed about 380-400whp easily with your current mods. Now the pulley swap comes into play, and adds 2psi or so, and an additional 20whp or so.

It's too hard to say what portion of the gains came from the plenum, vs. the pulley. But I can say with certainty, that just optimizing the tune is really the cause of your newfound power gains. Hope are you are enjoying it.

 

Steve does this mean that you may now go with the APS TT kit Now that you took a ride in the Z car.
I have the 3.12 pulley in my car and I can tell without even having it dynoed that there is def. a pick up in HP, it is pretty hard for someone to keep going back and dynoing his car so that everyone can get baseline numbers as mods are added on but it would be the only way to tell what mods add what power, I am just going to stick to my theory that there was some pick up in power with the SSV but not as much as was claimed in the begining.