Vq30dd
12-13-2006, 09:50 AM
#1
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Vq30dd
Would we be able to use the ECU-wiring harness stuff from a VQ30DD to run Direct Injection? Wouldn't this allow us to safely run like 12.5 compression on pump gas? (We get 94 Octane here) I say that would be a good combo with the superior 3.5 heads (cooling and knock surpression).
12-13-2006, 12:32 PM
#3
Originally Posted by Kevlo911
I think the US gas has too much sulfer in it to use nissans DD
It's not so much octane that's the problem (we have 93 and 94 pretty widely available here everywhere except Cali), it's the sulfer as Kev mentioned.
12-14-2006, 06:21 PM
#11
Originally Posted by Kevlo911
Like I said... IN NISSSAN's DD
Do some google searches on it, I found plenty of info back in the day when I found out about the motor.
Do some google searches on it, I found plenty of info back in the day when I found out about the motor.
12-16-2006, 02:59 PM
#18
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lol, if it cant be done in the US, it cant be done in Canada either. The only advantage I have is nigh sea level, but poorly prepped tracks. The gas is most likely the same type of ****.
I was really curious about this one ever since someone brought up a hypothetical VQ35DD in an old thread. Since I'll be running this engine like a 3.0 I wanted to know if it was possible to use 30DD stuff to obtain a 35DD.
Looks like it's back to searching how high of a compression ratio we can run in North America, on pump gas with the regular 4th gen multi port setup.
I was really curious about this one ever since someone brought up a hypothetical VQ35DD in an old thread. Since I'll be running this engine like a 3.0 I wanted to know if it was possible to use 30DD stuff to obtain a 35DD.
Looks like it's back to searching how high of a compression ratio we can run in North America, on pump gas with the regular 4th gen multi port setup.
12-18-2006, 11:07 AM
#19
Originally Posted by Hoooper
mazda isnt the only company today with DI in american sold cars. they are saying the problem is with this particular setup from nissan, not that it cant be done
The new Toyota 3.5 liter V6 in the IS350 is a DI.
And I thought they had removed the high sulfer content in North American gasoline for '07 as they did for the diesel fuel.
12-18-2006, 11:11 AM
#20
Originally Posted by SR20DEN
The new Toyota 3.5 liter V6 in the IS350 is a DI.
And I thought they had removed the high sulfer content in North American gasoline for '07 as they did for the diesel fuel.
And I thought they had removed the high sulfer content in North American gasoline for '07 as they did for the diesel fuel.
12-18-2006, 02:02 PM
#22
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Originally Posted by Kevlo911
Where did you read this?
http://www.fueleconomy.gov/feg/lowsulfurdiesel.shtml
http://www.eia.doe.gov/oiaf/servicerpt/ulsd/index.html
http://www.npra.org/issues/fuels/gasoline.cfm
http://www.dnr.state.wi.us/org/aw/ai...urfuelfaq.html
12-19-2006, 09:44 AM
#25
Originally Posted by Kevlo911
Sweet, good to know. I wonder how the extra ethenol(spell?) in the gas in the NE affects direct injection.
12-19-2006, 10:46 AM
#28
Originally Posted by Kevlo911
No it's not a good thing. It is only good if the car is made for it.
in addition to hopefully being cheaper and give you more power ( even though less mpg) ethanol is great for people who can tune a car since it has a high octane rating and will help reduce detonation. so in theory u can run the same car harder
12-19-2006, 11:22 AM
#30
e85 is ethanol mixed with gas.....if u can get ur hands on some it has an octane rating of something like 108 or something. run that with more timing and there is yoru power gain, and also your 15% or so loss in mpg
pure and cars wouldnt start in cold weather in the NE.
pure and cars wouldnt start in cold weather in the NE.
12-19-2006, 11:42 AM
#32
there is an e85 locator online somewhere i misplaced it, but yeah the 10 or so % in what we have now, which i think is called e10 or gasohol or something liek that, isnt doing much for us aside from burning cleaner. i kno they sell it in our area but only on military bases or something for testing before its available for public use
12-19-2006, 12:45 PM
#34
Originally Posted by SR20DEN
It costs more to burn E85 than regular gasoline.
Ya I know. I was just stating, there arent many places that have E85 so too me there are no advantages. I really didn't want an answer to my question
12-19-2006, 10:12 PM
#35
Originally Posted by Kevlo911
Where did you read this?
I was very surprised they didn't just make a VQ35DD instead of the VQ35HR. Mazda and Lexus and I think maybe VW/Audi all use DI here. I don't see why Nissan can't do it. Super high compression, better mileage, and more power FTW. Changing those injectors would probably be a major PITA.
However converting to DD aftermarket would be very, very difficult. You would at least take a new ECU, probably wiring harness, fuel pump system, and different heads to get it to work.
12-20-2006, 05:45 AM
#36
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Originally Posted by SPiG
http://forums.maxima.org/showthread....ghlight=sulfur
I was very surprised they didn't just make a VQ35DD instead of the VQ35HR. Mazda and Lexus and I think maybe VW/Audi all use DI here. I don't see why Nissan can't do it. Super high compression, better mileage, and more power FTW. Changing those injectors would probably be a major PITA.
However converting to DD aftermarket would be very, very difficult. You would at least take a new ECU, probably wiring harness, fuel pump system, and different heads to get it to work.
I was very surprised they didn't just make a VQ35DD instead of the VQ35HR. Mazda and Lexus and I think maybe VW/Audi all use DI here. I don't see why Nissan can't do it. Super high compression, better mileage, and more power FTW. Changing those injectors would probably be a major PITA.
However converting to DD aftermarket would be very, very difficult. You would at least take a new ECU, probably wiring harness, fuel pump system, and different heads to get it to work.
12-20-2006, 11:43 AM
#37
No I meant converting to a VQ30DD even with the JDM OEM parts. Aftermarket as in converting it custom, i.e. not having Nissan do it from the factory. I have never even seen VQ30DD parts in the US, so that would be your first thing to accomplish in something that seems rather uphill IMO. People have done plenty of other things that others said were impossible or not worth it so if that is what you want to do, go for it.
12-20-2006, 12:04 PM
#40
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The problem I think is that the 30DD most likely uses the 3.0L oval ports so my VQ35 lower IM does not match. I am only planning on a custom upper intake manifold (ITBs) but am not touching the lower with a 10 foot pole for now.