I wasn't surprised to see the shorter trumpets made a bit more peak, but what (if anything) was ever found regarding overall intake + exhaust length?

Did you guys just end up running open ITB's with foam filters and no airbox? I see the hood had some ducts cut into it.

1slow370z made 360whp on pump gas. And 371 with e-85. Would one say the vvel heads have an advantage over the hr heads?

No, because if you want to run "big" cams, you have to ditch the VVEL.

VVEL "is not" motorsport quality technology (jury is out on reliability) and the potential for VVEL actuator failure in hi-rev and hi-vibration environment is just not worth the risk.

Only Nissan understands the relationship between piston position and valve clearance and reverse engineering it will be a b1tch.

Ergo, if you want 400+ the only reliable way will be with HR heads.

I have not doubt you can make 400+ with VVEL, but you might lose 2 or 3 engines getting the level of knowledge, UNLESS you can get access to the OEM Nissan model for valve timing and lift vs position of the piston in the bore. then you need to be able to play with cam timing - it is just too hard !

It is not an investment I would make

I gotcha. Damn, Hr conversion is a B*tch to convert?

Hi guys I'm new here. I just got a 2014 Nismo. My first foreign car ever. I have always built mustangs just recently got rid of a 700 hp fully forged and stroked Saleen. I never built a Japanese engine. Your saying that my Nismo has 350 hp. You are saying its gonna be hard to post 400 at the wheels? I did that with a few mods on my Stang with bolt ons. Hit 700 with a supercharger. What type engine do I have. Is it forged, what's the Max I can get out of this engine before going forged. The car is too new to dump 20k in it. I'm looking for your basic mods. Intake , exhaust, throttle body, intake manifold, headers, fuel injectors, or I'm still thinking Mustangs? Any help wil do.

You have 350 crank. You have 280 wheel!! Gaining 120 wheel is very hard and expensive NA!! With all those mods expect around 320 wheel on pump and 330 with e85 (only reason to get injectors is going e85). If you want 400+ wheel you better drop a SC or turbo in.

PS, hit me up for throttle bodies and manifolds (yes we have 2 of them).

This no ford

This is not an accurate statement. Yes you can make 400 whp and yes you can run "big" cams 282's from Jun is what 1slow370z ran. No you do not have to delete VVEL. Yes you can work on the heads by upgrading the exhaust cam, port and polish, you can go 1mm over on valves and also upgrade the valves... All while keeping VVEL on an NA car. I was with 1slow370 the night he put his car on the dyno untuned... It put down consistent 354rwhp untuned! With e-85 they were able to get into 375rwhp. This was stock displacement with forged internals. If you want 400rwhp get a 4L stroker kit and go down the same path as 1slow370. Also use the z1 headers as people are making 342rwhp with just intake, intake plenum mod, headers and exhaust.

Most people will say no it's not possible... Well they haven't tried. Also, VVEL is not a weak point in this motor! It's just different and requires working with the system to make power. Put it this way we have 1000rwhp 370z with VVEL on my 4.5L and I have built heads.

I thought 1slow370z ran stock internals?

world record N/A 370z build
 

subscribed :)

He ran forged rods and Pistons... Basically a stage 0 short block from GTM.

Per his build thread, it's stock pistons and rods. Is that not the case?

The Mustangs do make good power but also have an extra 1.3L of displacement. That displacement goes a long way. The 4.5L stroker in N/A form easily breaks 4xxwhp...

You can do the following and should easily break 400rwhp:

4.0L stroker kit $3-5k
Bare short block (reuse your own)
Jun 282 cams (not sure on price $800?)
Built heads $2-3k
Custom intake manifold $2-3k
Stillen G3 intake $450
Z1headers $800
Test pipes $300
3" exhaust $1200
Lightened flywheel/clutch combo $1000
Fuel system to support the power $1000

Total cost $15k-$20k with labor

Note: you can run dry sump and gain a significant amount of HP but you will be paying north of $12k for it...

They were stock specs... I believe that is what he was trying to get across. It was only for reliability sake... He did not get any performance benefit except for reliability.