Something I'm thinking about doing... - Page 47 - Maxima Forums



Nitrous Discuss dry, wet, and direct port nitrous setups. How many shots can you handle?

Something I'm thinking about doing...

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Old 04-24-2017, 05:29 PM   #1841
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Just sitting here, watching more Street Outlaws and loving the racing - but with snows done and spring coming fast around here, it's time to get back to work on the car. I've had time to think over several issues, and find some answers.

In no particular order:

Cylinder block guards, to prevent cylinder wiggle. Have a set of Supertech Blockguard inserts just waiting..

Decided not to install larger valves or port the heads - just clean up flashing in the ports. With monster cams, porting seems unnecessary.

Cam timings are kinda decided - still must wait until final assembly to be sure.

MS3-Pro Ecu: I have the new essential sensors for MAP, air and water temp, and a newly designated and superior Hall sensor for the trigger wheel. (and it's red)...

Still need to order a custom oil pump, which I'll need before final assembly, but $900..... this one addresses the major failures of the VQ35 oil pump - hopefully this means it won't break.

I needed to consider the changes in displacement and upper rev limit of the BC stroker, and there are several. The displacement goes from 3.5L to 3.8L and rev limit will go to 8000.

MAF flow at 3.5L/6800RPM is a calculated 416 cfm, and at 3.8L/8000RPM goes to 532cfm. I'm looking at a larger TB and MAF, and a custom intake manifold made from a 2012 LIM and sheet aluminum. I have the 90mm Q45 TB and MAF(3-wire) and some 3.5" tubing and a 90* elbow, and still debating a final design. Gonna need to suck some air !!

Original compression ratio was 11:1 w/CPs, but with the longer stroke it goes to a calculated 11.9:1. Good thing I'm on E85 - or E98 if needed.

Since air flow is increased by 12.8%, fuel injectors will go from 440 to 550 cc Bosch EV-14s. The present WALBRO 450 fuel pump is plenty big enough..

I need to buy a plasma cutter to do some work on making parts for the IM, on the exhaust header collector, to move the 3" dump from the left side to the right side, (the 6AN fuel lines side) so I can replace all the lines in the fuel system with 8AN lines. (and because I always wanted one).


Things to do! (and probably forgot more than the list shows). And of course the nitrous system needs re-engineered (or maybe turbo)??
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Old 04-29-2017, 11:40 AM   #1842
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4.0L Intake

It occured to me that there is one Nissan V6 intake system that might serve for a larger intake - the 2013 Frontier 4.0 that I drive has interesting parts. Although it is a RWD vehicle, still maybe.....

PIX of UIM:
















and a couple of views of a LIM and UIM for the same engine:







If - the LIM will mount on my new engine, I think I can shape the UIM manifold to work. The LIM is close in dimensions to the 2012 Maxima LIM I used last, but I think I'll need to buy a Frontier LIM to be sure.

A side note - I'm starting to receive the aluminum bar stock and sheets of 1/4" plate I ordered. I can make a UIM if needed, but adapting an OEM part would be easier, I think.
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Old 05-01-2017, 06:14 PM   #1843
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stuff..

I have ordered a Frontier 4.0L LIM, so it's on it's way. I'm 99% sure that the width between intake ports is greater than the VQ35DE spacing - because the 4.0L deck is taller and so the distance between heads will be more. Still, parts-in-hand. If using the UIM looks possible, even with mods required, maybe. I just got a FedEx truck load of 1/4" aluminum sheets, (OK, maybe a few) so that's now Plan B.

I also just ordered a rare fresh-and-new Cosworth oil pump with all the racing mods for the VQ35DE - rated for 8,500 RPM, higher oil pressure, much stronger gears, and so maybe blow-up proof.
And, only $579 from BoomBop...
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Old 05-05-2017, 08:49 PM   #1844
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stuff coming in the mail !!

I have received a nice sealed new Cosworth oil pump, the 4.0 LIM from a Frontier, two chunks of 1" x 3" x 26" aluminum, two sheets of 1/4" x 12" x 36" AL, and one sheet of 1/4" x 12" x 16" AL. Also some 10AN-3/8"NPT fittings and end caps for the 10AN connections into the oil pan. Also bought a new Walbro high-pressure E85 tank pump - seemed like a good idea.

The Cosworth pump is the real deal -came sealed into the shipping box by Cosworth and has orange paint on all removable parts. Gears appear to be machined steel.










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Old 05-05-2017, 09:04 PM   #1845
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More...

Intake LIM from 4.0L, and one from a G370HR, proved to be shorter and wider than the 2012 Maxima manifolds I have here, although the ports from the UIM vary a lot on the first two, still nothing will adapt to the port spacing I have on the Maxima LIM. Summary - no 4.0L UIM will work as-is. Oh, well. I had to try.

Block guards:




4.0L UIM:



370Z HR UIM:



3.5 Maxima UIM: - this is the only one that mounts up correctly



Now that the weather has finally broken, I can get back to work. Stupid cold and constant rain sux.

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Old 05-13-2017, 06:41 PM   #1846
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newest fuel pump specs

I received this pump a couple of days ago. I checked and verified it's real and not a counterfeit pump. Highest sustained pressure and volume of any in-tank Walbro pump.

http://walbrofuelpumps.com/media/wys...267-450lph.jpg

"
Walbro Part Number: F90000274
Flow Rate: 485LPH
Operating Pressure: 35-120 PSI"



http://walbrofuelpumps.com/walbro-48...utomotive.html

Radical new design, too.

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Old 05-14-2017, 02:07 PM   #1847
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New DRs from Jegs

Because it's Mother's Day, and Jegs had a good sale going, I just bought two M/T ET Street S/S Radial tires, 275/50R15, for the Shark. The last pair were used up (rode hard and put away wet too many times), and Jegs had these for $181.50 each, including shipping to my door.

Regular price is $ 206.25 - a saving of $49.50 for the pair.
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Old 05-17-2017, 08:30 PM   #1848
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tires arrived today - also some other parts..

One pair of Mickey Thompson ET Street SS 275/50R15 tires..












Walbro - biggest E85 pump they make, with 485LPH and highest pressure..











10AN x 3/8" NPT fitting - also got a 3/8" NPT tap for it - gonna put two of these into the 1" aluminum JWT oil sump spacer - just in case I need one, you know.


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