Ivory

iTrader: (3)

did that really give you any gain? any stats on how much back pressure you lost and the change in torque curve?

Z1 Performance

iTrader: (564)

it was a joke

__jb

iTrader: (3)

Any news on your BC stroker?

I notice that it's back out of your Sig again... I suspect that's a bad sign...

Kwame

iTrader: (78)

Honestly, its not a bad sign I just got tired of seeing it and getting PMs (don't worry I don't mind you asking about it ). But I recently made a huge financial move and left my day job (mortgage biz) to go back to school. So I had to lay off spending huge chunks of money on the Z. I'll be back at it very soon, as I'm at the shop full time (631-863-3820 if you need any parts lol).

How is your project going?

__jb

iTrader: (3)

Glad to see that it's still a work in progress.

Mine is coming along, but currently moving slowly too. Ended up special ordering a set of pistons and they seem to be taking forever to come in. Can't do much until we get the pistons.

Ivory

iTrader: (3)

After seeing the kind of things happening around the forums, I no longer pass any judgment on anything done to the cars at all. So naturally I have no sense for sarcasm or humor.

In any case, surprised how much you've gained from tuning alone.

Z1 Performance

iTrader: (564)

it shouldn't come as any surprise...proper tuning is what separates just a nice parts list from actually working and making power. This is still all being done on regular run of the mill pump gas as well. Both tunes done so far have been completed in 85-90 degree weather. I'm sure with race gas put into the mix, on a nice cool, fall day, another 10-15 whp could easily be achieved, but I'm all about tuning for the worst case scenarios, as it's just a street car

Ivory

iTrader: (3)

Sounds nice. There is hope for 400whp stroker NA yet.

Hoooper

iTrader: (5)

+1000000. i cant believe how many cars i see that have a real nice parts list and even a good ECU/piggyback to tune with but still clearly arent tuned well. its refreshing to see your car where more time goes into maximizing what you have and not what you can buy next

copec

Do you happen to have pics of the porting of the heads and lower intake manifold?

Ivory

iTrader: (3)

what kind of valve setup did you use?

Z1 Performance

iTrader: (564)

stock valves on my car, nismo valvesprings

Ivory

iTrader: (3)

Oh ok. Thanks, because I talked to the shop with the ITBs from Jenvey, he was telling me a +1 advance on the valves yielded some pretty significant hp to the wheels. So I was wondering if you had any particular setup to the valves.

nismology1

How do you advance valves? You mean +1mm diameter? Larger valves are definitely not in the value sweet-spot for building up an n/a VQ.

Ivory

iTrader: (3)

he said +1 so..yeah you are right with the mm but Im sure they have a reason to say that, especially after gaining 35whp from it with the ITB

nismology1

If my budget was unlimited I'd go for it. I'd probably have the combustion chamber reshaped and get a good valve job before I went oversize, though. My $.02.

Ivory

iTrader: (3)

probably going to leave the valves as is, the job just keeps getting bigger

Z1 Performance

iTrader: (564)

You're not going to net 35 whp from going to ITB's on this car, let alone going +1 on valves, whether you use an ITB or not. Based on what I've seen with a bunch of heads on the bench, I'd bet you would not even gain 5 whp. The valve diameter is not the biggest issue on the car, especially in NA form, there are plenty of other areas to focus resources IMHO. Again, a good machinist is the single most important factor in building this, or any other engine

Ivory

iTrader: (3)

I'm going by what the tuner told me, which has netted 400+ whp on their NA VQs while running the ITBs in UK, the same ITB in the 380RS Nismo race cars.

Z1 Performance

iTrader: (564)

I won't get into what dyno #'s race teams world wide are getting out of the VQ because that's neither here nor there. Keep in mind that those are full out race builds, on race gas, with tremendous compression, very aggressive cams, dry sump oil systems, full standalone mgmt., sequential gearboxes, etc - these are not street cars by any stretch of the imagination, these are full out, competition level, $300,000 race cars. Yes, those engines certainly do exist, and have for quite some time. For about $50k starting price, they'll even sell you one I bet http://www.rjnmotorsport.com/ is one such source.

The 380RSC race car yes uses a Jenvey setup...but it's not the same setup as you see posted, as the RSC uses an HR engine, not a DE, and it's also got significantly lower mounting than a std. VQ engine,different trumpets, a fully spec'd airbox (I'd guess around $5k alone for that), etc etc.