sentry65

iTrader: (11)

thanks man, I'd so love to experiment with doing this, but I don't have the cash to throw around at moment either. Maybe in a few months though

zachcrosen

iTrader: (23)

I wouldnt think it would cost all that much. I am guessing as follows:

-$250 for the WG
-$100-150 for the custom pipe fab and weld work(I hear a local guy is awesome and cheap)
-$125 for pulley and belts
-$100 or so for install of pulley and belts
-$200 for retune at CPR

That is around $750 give or take. Not too bad if I can make the power gspot35 claimed to have made. He said he gained roughly 30RWHP and 30RWTQ at 4200 and 5200 with this mod!!! Here is the email from him regarding his numbers:

I have them but not electronic. I can say this…w/ 3.12 pulley I was at 353/300, with the 2.87 I was at 365/323. Here is the important part.

B4 4300 RPM 275 ft lbs
AFTER 4300 RPM 305 ft lbs

B4 5200 RPM 290 hp
AFTER 5200 RPM 320 hp

You can see power comes on much sooner. We’re talking big power change here!

zachcrosen

iTrader: (23)

I spoke with Eric at CP Racing a little while ago and he said he does not like the idea of adding a WG to a Vortech setup. He really didn't elaborate on the idea and why he didn't like it. He said that, if I were him, he would just add the 2.87 pulley and put it on the dyno and see what the boost is and where the injectors are at. I told him that I already purchased the WG and want to try it and see what happens and he said he had no problem working on it. His prices were as follows:

-2.87 pulley and belt --> $150
-Install of belt and pulley --> $100
-Retune using SS Box -->$200

He also mentioned that it would cost slightly more if there were issues with the WG and/or how it was hooked up, etc and I wanted them to look at it. So, I told him that I would like to see what happens with the WG and go from there. My plans are to get the WG and have a local guy use the steel flange included with it to fabricate an aluminum one and have it welded to the stock pipe going from the blower to the IC. I would then go ahead and install the WG and hook it up and run the car as is until I can get the cash to make it to CP Racing to have the pulley installed and car retuned.

Opinions, thoughts, concerns??? These would be greatly appreciated as I am really going off what I have read in this thread and what email traffic has gone back and forth with gspot35.

acg

iTrader: (7)

Hey Sentry I am wanting more power and I am not planning on building the motor for another few months yet so I was wondering what you would think would be a good way to pick up some additional hp. Right now I have;
Vortech 3.12 pulley
Crawford Plenum
Crawford HF cats
Fuji Y pipe
Fuji Exhaust
JWT cams
DC headers
650cc Injectors
Walbro fuel pump
AAM fuel return system
Larger FMIC
Edge racing TC
SGP valve body.

So what would you reccomend to do next.....2.87 pulley? put the T trim in before the motor build I don't think so.
This wastegate idea? any ideas welcome

sentry65

iTrader: (11)

how much power are you putting down with that setup? You're probably putting down like 440+ whp at 9+ lbs of boost right? You sure you want more power? Being a SC, even if you're doing 440whp, it's probably actually more like 480whp that the engine is doing.

going to the 2.87 pulley is the only next major step you can do, but you're going to be overdriving the blower, intercooler and the engine will be sucking in more air, but it'll be hotter air. I'd recommend a water injection kit along with the 2.87 pulley if you decide to do it. Hell even a water injection kit by itself can net you like 10-20whp (or possibly more because the vortech intercooler isn't very big) if you tune for it

Otherwise, you can always get the 3.9 final drive or a more extreme clutch if you want more oomph out of your setup without stressing the engine any more, though you will be in the higher revs more often. IMO the 3.9 final drive works pretty well if you have a good tire setup

acg

iTrader: (7)

Thanks man, yeah I thought I was at the max level until I swap out the blower and go forged, I was contemplating the 2.87 pulley even though it would produce hotter air I do have the upgraded FMIC to help out a little.
Oh well we shall see what I do next even though water injection sounds good.

sentry65

iTrader: (11)

what are people's thoughts on putting the 2.87 pulley on with water injection and pulling a ton of timing out up top?

I know pulling timing raises EGT's, but water injection lowers EGT's and effectively raises the octane and cleans the engine internals

I'm making 450-460ish whp right now as is, I'm probably stupid for wanting the 2.87 pulley. I mainly want the extra 30whp/tq in the midrange.

I have a feeling if I go to all the trouble dealing with a wastegate and spend all the money on it etc, that I'll end up undoing it someday when I build the engine

jpc350z

Zach, any update on your plans with installing the wastegate??

sentry65

iTrader: (11)

I ended up just sticking the 2.87 pulley in and going with it. Didn't even NEED water injection or anything. Honestly I think the intercooler is up to the task more than people give credit for. I gained 25-30 hp/tq as advertized. Of course I'm running a 50/50 mix of 100/91 octane gas and am installing water injection anyway. At this point I think the money is better spent on a water injection kit than a wastegate

jpc350z

Sentry,, could you post the dyno charts of the two different pulleys.. Thanks

sentry65

iTrader: (11)

this was with minimal tuning because I need larger injectors or need to fix an issue with my fuel pressure dropping still with my return system - so some of the timing up top is on the conservative side cause I was going from 11.x-12.5 A/F from 5500-6600 rpms. There's probably a few places that more power could have been picked up if we spent time fine tuning the tune

btw this is on a dynodynamics dyno, so numbers are roughly 10-12% lower than a dynojet. The temp inside the shop was around 85 degrees and AZ is roughly 1250 ft above sea level


oh and actually I'm only hitting 9.2 or so lbs of boost - not 11 as it says on the dyno. I have JWT cams etc so especially up top it flows a lot easier and my boost pressure isn't as high, but I'm making more power than if I didn't have cams and had 11-12 lbs of boost

jpc350z

To be clear on what the difference is attributed to between the 2 dyno's, the higher #'s results from the addition of the 2.87 pulley only Correct?

sentry65

iTrader: (11)

yes

jpc350z

Sentry, I took your Tq #'s and increased them by 10% and compared them to my Tq #'s which were done on a dynojet with the 3.12 pulley for comprison purposes.

Your's/mine

3500rpm 302/265
4000rpm 352/280
4500rpm 374/290
5000rpm 374/310
5500rpm 369/310
6000rpm 369/313

These are huge differences attributed to the 2.87 pulley and your cams..What do you think is the most significant contributor(s) to the differences?

sentry65

iTrader: (11)

the vortech was the last thing I added as far as breathing mods so I can't directly compare, but from what I understand, cams will net like 30-40whp/tq with forced induction, headers will do 10-20whp, the 2.87 pulley obviously makes 30whp or so more than the 3.12. I think HF cats make a huge difference too with the kit. I'm using the SSV, but I don't think it's contributing much more than a normal crawford plenum. Some people say it loses power, but I have no idea since most people don't try to really fully tune with it.


jpc350z, what are all your power mods? Do you have exhaust and HF cats?

my power mods are:
vortech, 2.87 pulley, and cold air intake
350EVO ported throttle body
kinetix SSV with thermogasket
JWT cams
crawford headers with HPC ceramic coating
crawford HF cats
JIC Y-pipe
nismo exhaust
technosquare flash
emanage ultimate
grounding kit and voltage stablilizer
1 step colder spark plugs
synthetic oil
disabled VDC
75% water in radiator with water wetter - less effort for water pump with water (AZ doesn't get too cold)

other things that might contribute some by eliminating drivetrain loss:
lightweight wheels
lightweight rotors
solid motor mounts
KJR crank pulley
ATS carbon flywheel
lightweight tires
lightweight lug nuts
3.9 final drive

some people have claimed their car feels more responsive with a return fuel system - dunno how much i believe it, but maybe it's possible?

some of those things really might not do anything, but that's everything on my car that I can forsee as possibly producing power in any shape or form

zachcrosen

iTrader: (23)

I bought the TiAL WG and when I got it, it was HUGE!! After I got to looking at everything, I decided I needed to get a lot slimmer fan setup and I did not want to drop over $400 on Flex-A-Lite fans. So, I sold the WG and bought a set of test pipes, a Magnaflow x pipe muffler and am going to retune. I also need to start saving money for building my home in the next 6-8 months!

jpc350z

I have :
3.12 pulley
AAM Flash
D.C. Headers
JWT Fly
AAM Plenum spacer
440 inj /Walbro

Engine output: 398Hp/314Tq (Dynojet)

Plan:
2.87 pulley
Borla T.D.
Re-Tune

sentry65

iTrader: (11)

yeah looks like you have a lot more potential still with exhaust, cats, pulley, cams etc

hope it goes well for ya

jpc350z

I am hoping the 2.87 pulley which spins the blower about 8-9% faster than the 3.12 will give me about a 5% increase after losses are accounted for. (heat, I/C resistance, blower inefficiency etc...) If the 5% is accross the band I'll be a happy camper..

dlt1cy

After looking at their website, the HKS might work. It's a true bypass valve with a secondary "pop off" valve. The "pop off" valve has to be connected to a boost source and never see vacuum. Could you weld a nipple on the ic piping and attach a hose?