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Old 07-03-2006, 06:08 PM   #1
nomex ninja
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Default TD04 Cobb St2 > VF39 + PDX map

My ass dyno says that Cobb stage 2 was significantly faster with my stock turbo, than the VF39 and PDX maps I have now. Discuss...
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Old 07-03-2006, 06:26 PM   #2
hondaeater69
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wow that sucks! my vf swap felt 10x better than my stock turbo. Do you mean just down low in power? the stock turbo will have down low power that vf turbos don't have, but the vf will MORE than make up for it once it kicks in. the vf powerband should be much much better than the stock turbo's. . .
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Old 07-03-2006, 06:26 PM   #3
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Lag is a bitch
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Old 07-03-2006, 06:37 PM   #4
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Man, I really wasnt expect that much lag I guess.

The car used to take off with the stock turbo.

Maybe Im jumping to conclusions - the maps were written for a GP moto header, and it is still in the mail. So I havent gone full throttle yet, because I'm waiting to put that on. Iv gone probably 75-80% throttle though and Im not too impressed.

Last edited by nomex ninja; 07-03-2006 at 07:52 PM.
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Old 07-03-2006, 06:45 PM   #5
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Quote:
Originally Posted by nomex ninja
So I havent gone full throttle yet...

I wonder if that may be why...
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Old 07-03-2006, 10:12 PM   #6
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My recommendation :

1. try to downshift if you have to pass
2. rev it little higher between shift
3. get better boost controller
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Old 07-03-2006, 10:31 PM   #7
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Quote:
So I havent gone full throttle yet

You GOTTA BE KIDDING
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Old 07-03-2006, 10:56 PM   #8
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why is everyone so rude?
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Old 07-03-2006, 11:45 PM   #9
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Quote:
Originally Posted by nomex ninja
why is everyone so rude?

Quote:
My ass dyno says that Cobb stage 2 was significantly faster with my stock turbo, than the VF39 and PDX maps I have now. Discuss...
Quote:
So I havent gone full throttle yet
=

Quote:
You GOTTA BE KIDDING


WE aren't being rude----YOU are being ******


This thread is ridiculous.....in the extreme.
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Old 07-03-2006, 11:54 PM   #10
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Datalog and report back before speculating. The significant increase in lag can make a VF car feel slower than TD04...but I guarantee it makes much more HP. The mid-top end is way stronger.
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Old 07-04-2006, 03:13 AM   #11
Master2192
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Quote:
Originally Posted by TJRCS
1. try to downshift if you have to pass
Damn I wish the WRX would take a diet and get some better gearing like my RS, I don't have to downshift to pass. Sure the WRX is faster (after a downshift), but it lacks the ability to be thrown around like the RS because of its weight.
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Old 07-06-2006, 10:07 PM   #12
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How much does a two door RS weigh?
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Old 07-07-2006, 09:53 AM   #13
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I am waiting for my new computer (should be here today) so that I can log data. I am been WOT half a dozen times now, and I'm still not very impressed. I would say its just as fast with the VF39 but not faster. And yeah, the TD04 had way more grunt in the lower RPMs, and I think it pulled almost as hard at WOT.

Maybe I have an up pipe leak.
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Old 07-07-2006, 09:57 AM   #14
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Quote:
Originally Posted by nomex ninja
I am waiting for my new computer (should be here today) so that I can log data. I am been WOT half a dozen times now, and I'm still not very impressed. I would say its just as fast with the VF39 but not faster. And yeah, the TD04 had way more grunt in the lower RPMs, and I think it pulled almost as hard at WOT.

Maybe I have an up pipe leak.

maybe the 39 you got has a cracked WG and isn't holding boost properly, there were some issues with those. What kind of boost are you seeing on the 39? Should be a nice gain over the td04 so something is def wrong with your setup.
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Old 07-07-2006, 10:02 AM   #15
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PDX map = poop

I had a vf22 pdx map and had to get a protune to get the car running right. Once i got the tune, my dyno butt firmly stated that pdx sucks and a vf22 is faster.

I was running a 11.0 afr, max boost of 17 psi, and only made 225 whp with the map.
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Old 07-07-2006, 10:30 AM   #16
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Quote:
Originally Posted by nomex ninja
... I would say its just as fast with the VF39 but not faster. And yeah, the TD04 had way more grunt in the lower RPMs, and I think it pulled almost as hard at WOT...

That's called torque. How about check this comparison first.




I just made about 10wtq after switching to 18G turbo. BUT, it just pulls all the way to redline. 13T had 19psi @ peak and tapered down and 18G has 18psi all the way to redline). stock turbo just quits doing its job after 5.5k rpm. I'm pretty sure that vf39 is doing its job holding power little longer than stock one.
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Old 07-07-2006, 11:46 AM   #17
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troll?
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Old 07-07-2006, 12:03 PM   #18
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We need to know how much boost he's running on the vf39. . .
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Old 07-07-2006, 10:17 PM   #19
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Quote:
Originally Posted by hondaeater69
We need to know how much boost he's running on the vf39. . .
At WOT in 3rd and 4th its about 15psi. Same as it was with the TD04. I guess that seems low compared to the above posted 18-19psi. I just tried adjusting my boost control and I cant get it to go any higher. Do you think I have a boost leak somewhere, or does that seem right from a PDX base map? Pressure loss from my huge TMIC?

Is there an easy way to check for boost leak without taking my IC off and pressure testing it?

I'm stupid, humor me
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Old 07-07-2006, 10:43 PM   #20
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15 is low even for an OTS map. IT's not from a big TMIC. There is a leak somewhere in the system, the turbo is cracked, the turbo has a weak WG, or you need a custom tune.
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Old 07-07-2006, 10:54 PM   #21
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Quote:
Originally Posted by hondaeater69
15 is low even for an OTS map. IT's not from a big TMIC. There is a leak somewhere in the system, the turbo is cracked, the turbo has a weak WG, or you need a custom tune.
OK, crap. Thanks though. what is the fix for the weak wastegate, I noticed that you cant adjust the arm on the VF? I will check the system for leaks tomorrow.
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Old 07-09-2006, 11:02 PM   #22
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if the WG is weak, you can "spring" it, or get a custom tune. There is no manual adjustment on the IHI turbos. Let us know how you make out.
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Old 07-10-2006, 01:33 AM   #23
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Quote:
Originally Posted by nomex ninja
Do you think I have a boost leak somewhere, or does that seem right from a PDX base map?
What real time map are you running? When you get your maps from PDX you need to load the base map and a real time map. Maybe that might help a little. Good luck.
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Old 07-10-2006, 01:43 AM   #24
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There's several folks I know that are on NASIOC that are only hitting around 15 psi in the Texas summer weather and I've heard several folks say the same comments about the Cobb Stage II vs. the VF39 Cobb OTS map as far as the low end is concerned.
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Old 07-11-2006, 07:36 PM   #25
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try just running a VF30 or VF34 map. ive heard ppl say w/ the VF30 cobb map on a VF39 it runs great.

just wait to get protuned
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