RB25 Tomei 256 poncams vs HKS 256/264

[LaurelPWR]

Fair enough.  I'd actually glossed over the fact that the HKS cams were staggered.  My opinion on the matter of staggered cams with bigger exhausts on turbo engines leads towards discussion of fixing the problem that requires a staggered cam instead of the band-aid solution.  External gates &/or bigger rear housings &/or better ex manifolds being the non-band-aid solutions.

Yeah I get where your coming from with the "bandaid" idea.. some might assume they can gain some response from getting more exhaust energy into the turbo with the bigger staggered exhaust cam when they should rather be spending the money and effort on better boost control, a better flowing manifold or a free flowing exhaust etc.

That certainly isn't the case with my setup haha I have great response already and I was merely asking if you fine people think I might be able the pick up a few more hp without having my current graph curve drop below anywhere along the rev range from what it currently does [emoji4][emoji1365]

[tridentt150v]

I think that the 256 cams are not as much about adding more power as removing the compromises manufacturers have to make to the std cam profile for emission regs.  I have the Tomei's [but can't compare cos like everyone else does, I also changed turbo's and other stuff at the same time] but for me it was all about efficiency.  I would be looking at using the $$$ elsewhere if you want noticeable power gains. 

[GTSBoy]

Yeah, more boost is usually the first thing!

[LaurelPWR]

I think that the 256 cams are not as much about adding more power as removing the compromises manufacturers have to make to the std cam profile for emission regs.  I have the Tomei's [but can't compare cos like everyone else does, I also changed turbo's and other stuff at the same time] but for me it was all about efficiency.  I would be looking at using the $$$ elsewhere if you want noticeable power gains. 

I have a Platinum Racing R35 coil kit with R35 splitfires, Platinum Racing trigger kit, Taarks V3 twin walbro surge tank, HKS 1000cc injectors and rail, Oversized 49mm rb26 itb's with NAPREC 50mm gaskets, HKS 100mm cooler and a link G4+ all going on my rb25 in a few weeks so I'm all about wasting money on shit for small gains hahah...

I also have a new HTZ3076 with a Garrett 1.01 a/r twin scroll rear housing and I'm having a true equal length long runner low mount manifold made by specialist manifold maker altrack in Japan in the coming months, so more power is already a sure thing my dudes [emoji4][emoji1365]

Anyways, I have been offered a set of the hks cams for quite cheep and I'm tempted...

[LaurelPWR]

Yeah, more boost is usually the first thing!

More boost is definitely what I did when I put the hks 2835 pro S on my engine with e85, it already see's 24psi haha it's way out of it's league already but it makes the numbers

[tridentt150v]

Yep...I think you need to consider larger cams for bigger gains then.  I think the 256 profile would be too mild for your car.

[LaurelPWR]

Yep...I think you need to consider larger cams for bigger gains then.  I think the 256 profile would be too mild for your car.

It's a Street car so I would rather have epic low down response and a fat midrange and slightly less up top.. with the hks cams, it's kinda like I'm trying to have my cake and eat it..
I don't want to loose any of my response or mid while aiming to pick up a few kw mid-top.

[Findlay]

17 hours ago, LaurelPWR said:

 

I have a Platinum Racing R35 coil kit with R35 splitfires, Platinum Racing trigger kit, Taarks V3 twin walbro surge tank, HKS 1000cc injectors and rail, Oversized 49mm rb26 itb's with NAPREC 50mm gaskets, HKS 100mm cooler and a link G4+ all going on my rb25 in a few weeks so I'm all about wasting money on shit for small gains hahah...

I also have a new HTZ3076 with a Garrett 1.01 a/r twin scroll rear housing and I'm having a true equal length long runner low mount manifold made by specialist manifold maker altrack in Japan in the coming months, so more power is already a sure thing my dudes

Anyways, I have been offered a set of the hks cams for quite cheep and I'm tempted...

 

Oh wow you went with the altrack - post pics when u get it i was very close to going for it but found a hks cast and imported that for a good price (much less obiously) - whats the altrack costing landed?

On the hks cams note, loving the convo and in same spot as yourself. I wonder - is there any quantifiable added benefit in the 264 ex. Cam combined with the better flowing ex. manifold (i.e. hks or  altrack)?

[LaurelPWR]

Oh wow you went with the altrack - post pics when u get it i was very close to going for it but found a hks cast and imported that for a good price (much less obiously) - whats the altrack costing landed?
On the hks cams note, loving the convo and in same spot as yourself. I wonder - is there any quantifiable added benefit in the 264 ex. Cam combined with the better flowing ex. manifold (i.e. hks or  altrack)?

Aweosm man!! Not many know of Altrack, so it's a pleasure to see another person who recognises the artwork he produces [emoji4][emoji1365]
I'll definitely be posting up when it's done and in my hands. Will be costing around $3500-$4000aud
I currently run a HPI manifold.

[LaurelPWR]

Little bit of manifold porn (:
This is the manifold I'm having made for me but mine will be t3 twin scroll and have provisions for two Tial 38mm MVS gates.

[LaurelPWR]

Rb25 256/264 HKS cams acquired!

I've already spoken to my tuner so hopefully well do a power run with my current set up and then swap out the poncams to these hks sticks and re tune.. so without doing anything else but the cams, it should be a pretty decent comparison.

[Findlay]

Can i dibs the outgoing poncams?

Very keen to see results!

[LaurelPWR]

Can i dibs the outgoing poncams?
Very keen to see results!

If I like what I see from the Hks then yes, but if for some reason I get little to no gain and have a laggier curve then the hks will be for sale..

[Findlay]

Soild plan, keen on either assuming the hks arent rubbish of course!

[Andrey_gtst]

Any updates? I have unopened rb25det with greddy td05 + FMIC + nismo exchaust, Apexi PFC. Want to impove middle to top end. My tuner said that tomei's 256 will do the job.

[Ben C34]

On 3/10/2018 at 11:06 PM, LaurelPWR said:

Rb25 256/264 HKS cams acquired!

I've already spoken to my tuner so hopefully well do a power run with my current set up and then swap out the poncams to these hks sticks and re tune.. so without doing anything else but the cams, it should be a pretty decent comparison.

How did you go?

[LaurelPWR]

On 01/03/2020 at 11:53 AM, Ben C34 said:

How did you go?

Car is still getting the finishing touches done before tune....hopefully in a month or two m.

i ended up going all out and changed practically every bolt on and power adder hahah so it’s not going to be a direct comparison between the poncams and hks step 1’s unfortunately dudes....I do apologise.

i will still post results once it’s tuned anyways ✌?

[niZmO_Man]

Nice exhaust manifold

[tridentt150v]

Already run it too...by the look of the s/s

[LaurelPWR]

On 18/04/2020 at 11:19 PM, niZmO_Man said:

Nice exhaust manifold

Thanks hombré

ive made extremely detailed comments about these manifolds in other threads that you show interest in too haha