found the perfect VH45 valvetrain setup

Post by **defrag010** » Wed Jul 05, 2006 1:07 pm

.
Modified by defrag010 at 11:59 PM 2/2/2008

Post by **Ezekial** » Wed Jul 05, 2006 2:25 pm

Quote »The stock spring is almost in coil bind with just stock lift[/quote]How so?

There is a good 3.18 mm safety margin going off factory specs and your previous measurements

Which explains why you can run a 60 thou shim and still have at least 1.5 mm safety. No?

Good find on the springs!!

BTW the GTiR inner springs inside radius aligns with the factory radius on the VH45 retainer. No need to machine

Post by **elwesso** » Wed Jul 05, 2006 3:16 pm

so would that allow for more power on a N/A VH45 without any other mods, or would it require a cam regrind?

Post by **defrag010** » Wed Jul 05, 2006 8:10 pm

.
Modified by defrag010 at 11:59 PM 2/2/2008

Post by **Ezekial** » Wed Jul 05, 2006 8:25 pm

zero lift coil bind as in solid height yes?

and yes 60 thou or roughly 1.5 mm safety as i said above

pics of inner springs will be coming soon when i take the last 3 main bearings up to taree and pick up my conrods

Post by **defrag010** » Thu Jul 06, 2006 3:24 am

.
Modified by defrag010 at 11:59 PM 2/2/2008

Post by **defrag010** » Thu Jul 06, 2006 12:02 pm

.
Modified by defrag010 at 12:00 AM 2/3/2008

Post by **Mettler** » Thu Jul 06, 2006 12:50 pm

Could you provide the required dimensions ? I'll draw up a nice tech drawing to get some custom made.

Post by **defrag010** » Thu Jul 06, 2006 4:23 pm

.
Modified by defrag010 at 12:00 AM 2/3/2008

Post by **Mettler** » Thu Jul 06, 2006 4:46 pm

Good work defrag, it's going to be mean when you figure out a mint combo of OEM parts that'd be a suitable upgrade ! Should be pretty cheap too aye !

Post by **defrag010** » Thu Jul 06, 2006 5:35 pm

.
Modified by defrag010 at 12:00 AM 2/3/2008

Post by **texasoil** » Thu Jul 13, 2006 4:54 pm

it looks like a little careful work with a 'dremel tool' on the rocker will solve the slight interference. Make it a smooth long radius relief and it should not be a problem.

Post by **AZhitman** » Thu Jul 13, 2006 5:47 pm

Whoever said NICO doesn't have any good "tech info" can kiss my a$$.

Hear that [other nissan forums]?

GREAT work, guys!!!!

As soon as this all comes together, it goes in the articles archive - NICE!

Post by **defrag010** » Fri Jul 14, 2006 12:27 pm

Modified by defrag010 at 12:00 AM 2/3/2008

Post by **maxnix** » Fri Jul 14, 2006 7:09 pm

What about the pistons with that much valve incursion into the cylinder?

Post by **defrag010** » Fri Jul 14, 2006 8:04 pm

.
Modified by defrag010 at 12:00 AM 2/3/2008

Post by **Q45tech** » Sun Jul 16, 2006 2:55 am

Is valve lift [0.39" or 9.9mm] a real problem with such oversized valves [1.5"]..........isn't real problem duration [248] and the lack of overlap to create smooth idle and emissions. The peak curtain area [.39/1.5 =0.26] seems ideal except for the restriction in the valve diameter and intrusion of the guide.

By tuliping the intakes [and guide intrusion] wouldn't you accomplish the same flow increase.......is the exhaust flow insufficient after port work?

I love the fact they made these engines work and last with only 120# springs.

The dadburn problem of having to lug the engine down to 1550 rpm [47 mph] with AC on up a tiny incline [common US situation].

Post by **elwesso** » Sun Jul 16, 2006 3:48 am

If you are going to the trouble of doing cam work, wouldnt you want to run more lift as well as more duration? Especially if we can find a way to add meatier springs without a ton of custom modification.

Post by **defrag010** » Sun Jul 16, 2006 6:57 am

.
Modified by defrag010 at 12:01 AM 2/3/2008

Post by **defrag010** » Fri Jul 21, 2006 7:51 pm

.
Modified by defrag010 at 12:01 AM 2/3/2008

Post by **maxnix** » Sat Jul 22, 2006 8:14 am

Q45tech wrote:I love the fact they made these engines work and last with only 120# springs.

The dadburn problem of having to lug the engine down to 1550 rpm [47 mph] with AC on up a tiny incline [common US situation].

Which adds to the engines durability and quietness.

Don't think 1550rpm lugging will be possible with radical timing changes. without multiple dynamometer runs, one is just guessing what gains will be made, and at what price in terms of engine longevity.

Post by **defrag010** » Thu Jul 27, 2006 10:46 pm

.
Modified by defrag010 at 12:01 AM 2/3/2008

Post by **agentandy** » Fri Jul 28, 2006 5:29 pm

nice lab work.now only if cams were readily availble

Post by **elwesso** » Fri Jul 28, 2006 5:44 pm

im getting close to buying a set of heads and having you make a set of cams for me!!!!!! ready to bolt in!!

Post by **Jerminator96** » Mon Jul 31, 2006 2:44 pm

Any word on the make of those offset keys?

Post by **defrag010** » Mon Jul 31, 2006 5:21 pm

.
Modified by defrag010 at 12:01 AM 2/3/2008

Post by **defrag010** » Fri Aug 04, 2006 9:40 pm

.
Modified by defrag010 at 12:01 AM 2/3/2008

Post by **Jerminator96** » Sat Aug 05, 2006 7:10 am

Well that's great, SBC springs are a dime a dozen. Of course, most of us don't really have a machine shop at our disposal. Maybe you could tell us how long all of the machining takes so we could get an idea of cost?

That's good news though, i'll be happy to have some more good old american muscle in my motor

Post by **defrag010** » Sat Aug 05, 2006 9:03 am

Modified by defrag010 at 12:02 AM 2/3/2008

Post by **Mettler** » Sun Aug 06, 2006 11:16 am

Once this is all working, my question to you is whether I'll be able to do this stuff to my JDM spec VH41DE ?

I might have a bit of a compare of the part numbers in the valvetrain between VH41DE & VH45DE.

found the perfect VH45 valvetrain setup

found the perfect VH45 valvetrain setup for big cams

Re: found the perfect VH45 valvetrain setup (defrag010)

Re: found the perfect VH45 valvetrain setup (Ezekial)

Re: (defrag010)

Re: (defrag010) rocker interference

Re: (defrag010) rocker interference (texasoil)

Re: (defrag010)

Re: (defrag010)

Re: (Q45tech)

Re: (Q45tech)

Re: (agentandy)

Re: (defrag010)

Re: (defrag010)

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums