I8ABMR

Glad to see this thread took off . Good stuff

Joker4096

iTrader: (2)

they can be yours for about 6gs.

FilwithanF

iTrader: (1)

That was Best Motoring's off shoot channel, Hot Version, where they test modified cars. I remember Tsuchiya saying how the R34's front wheels were coming up off of the ground because the car was so powerful! It's one of my favorite videos!

I agree with you about Japanese tuning in general. They are usually never about numbers, but rather about excellence in engineering and balance. Another great example is the stroked K20 that Seeker was running in his Type R, making "only" 280hp out of a motor that cost about $15,000. But the reviewers loved the balance of usable power and response.

Here's the video, if anyone is interested:
It all depends on what you're after and how much you're willing to spend. Even though this motor is WELL out of my price range, I can still appreciate the amount of engineering that went into it and what a great achievement it is. Now someone on this forum just needs to buy and install it so I can live vicariously through you lol.

willstroo

Thats the one! Def one of my favourites too..

RRRacing

iTrader: (1)

A few thoughts:

There is no way their engine is making 530whp. 530 crank seems reasonable, but I don't think anyone has seen any dyno results and you can get pretty close to that with our tune and bolt ons.

Here is what I would do to get close to 500whp on a normally aspirated IS-F:

1. Bore it out -- sounds like you can get up to about 5.7L with sleeves (as shown on the SEMA LC500 that was sleeved)
2. Major head work -- oversize valves and porting (we actually have a local shop that offered us to develop a CNC ported head for the 2UR-GSE)
3. Custom cams
4. Increase compression -- on an NA engine, this is one of the most effective ways to make more power. ISF is 11.8:1, RCF is 12.3:1, and the new Mustang GT350 voodoo engine i believe is 12:1, but doesn't have direct injection.
5. Ported intake manifold and RCF 84mm throttlebody.

So if anyone is interested in doing an NA build an getting tuned for it, let us know!

-Rafi

Joker4096

iTrader: (2)

I agree with all of this. The IS-F heads need to be reworked completely.

lobuxracer

iTrader: (2)

Power is always in the cylinder heads. It's clear from the way the OEM configuration loses torque as the rpm goes up that the ports and cams are not suited to high rpm breathing. Changing the cams helps some, but if Novel is making the power they claim, they have reworked the heads pretty significantly - no doubt bigger valves and careful port work along with different cams to make breathing at 8500 rpm possible. It's not possible with stock heads, and I don't even need to see the flow bench numbers to be sure of that.

mk416

Might be a no-brainer question since boosting is always the easiest way for power gains, but how would this proposal fare against the supercharger? From what I can, this build will also easily cost upwards of $7000 or so...

RRRacing

iTrader: (1)

A basic forged piston and rod engine build with replacement of all seals and wear items alone would run about $7k... so going crazy with head porting, cams, etc would add significantly to that figure, if done right.

I am very certain that Novel's 8500rpm NA engine would be at least 50hp down on the SC setup. Keep in mind, the RCF has improved heads, cams, higher DI fuel pressure, and higher compression compared to an ISF... and it only makes 440whp or so with all the bolt ons and tune. So how much more power is more aggressive headwork going to yield??? 20hp, 30hp? Probably less than that!

Rafi

ilv1004s

iTrader: (8)

finding a used rcf 2ur and dropping it in a isf is probably going to be cheaper

mk416

Well, why did you have to ruin the fun with logic?

Supercharger it is!

lobuxracer

iTrader: (2)

I charge $3k to port a 2JZ head (GE or GTE) and that's pure labor, no parts you would need like bigger valves, shim under bucket retainers and buckets, springs, shims, etc..

A pair of ported 2UR heads (either version) would likely be about $4k from a talented shop, plus all the other fun stuff, a lot of which as Rafi said, was addressed with the RC F and GS F engines. The one thing we really don't know is how the engine responds to bigger lift cams, potentially with greater overlap when the better heads are used, and that's really the big question. Where is the Novel engine making its power? It might very well be a dog below 5k rpm until the cams come on and have a significant torque spike when it does that a lot like putting a large turbo on small engine. At least, that's what I would expect from a 5 liter 2UR with all the goodies to make big numbers.

The thing I especially don't like about an 8500 rpm redline is the stroke of the engine is not what you would engineer if you expected to run at that redline very long, and the rods are very short for a stroke this length so the piston kinematics are far less than ideal at 8500 rpm.

Given a choice, I would supercharge the 2UR (with any kind of blower or turbo) long before I would go looking for power at higher rpm unless I had a rule restricting me from doing it.

Pushtape

I am guessing NOVEL isn't concerned with some minor technicalities as mentioned above

lobuxracer

iTrader: (2)

Speed costs money. How fast do you want to go?$?$?$?

GreenJimmy

Bore to 5.7L -- that's the ticket.