SGSash

iTrader: (3)

Yes this was with the revup manifold.

This dyno compares the revup and non-revup from a couple weeks ago:

gt20ir

iTrader: (1)

siiiiiick!

so this is with the 100mm bore and 86.4mm stroke right?

0jiggy0

iTrader: (13)

Car sounds amazing.

kacz07

iTrader: (15)

Sasha, do you have a crankcase vent or catch can setup to allow the crankcase to pull vacuum? Do you think this could be a cause of oil consumption and leaky valve cover gaskets? Nissan's general issues with the vq and rev up motors?

Z1 Performance

iTrader: (564)

looking good Sasha

kac - the oil consumption issue was rings IIRC. Though, yes, a proper way of pulling vaccuum is certainly a good thing.

SGSash

iTrader: (3)

Bore is 96mm, not 100. It's just 0.5mm larger than stock, so the displacement is not really affected.

Right now the valve cover is just breathing to atmosphere. I have all the fittings and check valves etc to try an exhaust scavenge setup that I'm going to work on in the next few weeks. It will require a catch can so that I'm not sucking oil into the exhaust (which may actually be a good way to keep the competition behind me - they will always think my engine is about to blow if it's smoking out the exhaust!)

XChacalX

iTrader: (7)

Sasha , how big would be your expectation as far as gain with the exhaust scavenge setup ?

I'm interested into something like that with my 370z if it is worth of doing

gt20ir

iTrader: (1)

not sure what your header primary diameter is but you may need a larger size as well, 1 7/8" off the head most likely,

johnwigs

dry sump will put the crankcase in a vacuum and allow the engine to be placed lower in the engine bay!!!

gt20ir

iTrader: (1)

dry sump is a great way to go no matter what,

archangel72

Sasha, how would your toque formula affect a stroker kit. Meaning, say I had a stroker kit that still alowed me to rev high, with higher gearing and these cams, would that make a better platform? Or would you gain back some of the lost torque, but not be able to safefly rev as high?

gt20ir

iTrader: (1)

if you have a BMEP of 200psi and you increase your displacement by 10%, and your TQ only increases 10% then your BMEP will remain 200psi

Nukiz0r

iTrader: (4)

I gotta know what the OP did to make it sound like that. Amazing.

Zazz93

iTrader: (2)

Not to say the strokers will not rev safely just remember the longer stroke will increase the actual piston's speed and that's not good for rev'ing. I would imagine with other supporting mods, most strokers will be relatively safe up to about 7100 - 7500 revs. As stated, because the formula uses the displacement as a factor I would imagine the torque would increase in a proportional matter to the increase in displacement. Just note, strokers are incredibly expensive due to the hours and hours of labor along with the sheer volume of parts to be changed.

gt20ir

iTrader: (1)

I do like how with the C9 cams, the power band carry's out a lot further and does not drop off as fast. I imagine with better cylinder head and intake flow and larger diameter headers that the top end power gains would be much more...

So was this with the C10 IN and C9 EX correct? Any info on the C10 cams? I had talked to Clark a few months back about the C9 vs C10 HR cams and he recommended the C9's unless you had a very close ratio gear box like a sequential as he said the power band was much narrower. They did make more power, but just a tighter power band up top...

Just curious on your input since you seem to have some good "hands on" experience here (thanks for testing BTW)

Fixxxercask

iTrader: (21)

I love watching progress on this car. Subscribed for more info.

archangel72

^Thanks guys, just wondering if tuning alone can restore the lost torque or if more stroke can bring it back up. I am really impressed the outcome of these cams. Don't really have the funds right now, just got married, but its my goal to stroke this engine, higher my gearing and find aggresive, but street drivable cams.

Sasha, how did these cams perform on the street?

Andrei

iTrader: (7)

The C9 requires valve cover clearancing? JWT says cylinder head only?

Or do the C10 cams from the HR require valve cover clerancing and head clearancing also on the Revup? Where are they for sale?
You all need to run to the store and get a HD camera. It's like $113

346whp and 260 tq is around what a E90 M3 makes on a dynojet with the M mode on and it's a lot heavier. It's easily pushed over on handling also with a few SPL parts. hahaha Congrats!

Has the car been to the 1/4 yet. What does it run???

gt20ir

iTrader: (1)

The valve cover does require clearancing as well because of the high lift. If you look into the bottom of the valve cover there are notches where the cam lobes are to clear the valve cover. Those are made for stock lift and profile cams. It is part of the breather system though so I thought of just pressing those pieces inwards to make more clearance. would rather do that then cut them out...

As for the midrange in regards to cam timing. They said they could not run so much advance on the intake due to valve to piston clearance, so that tells me that there is still some power to be had in the middle with proper reliefs and tuning. It may not be much, but possibly 10-15lb ft. Either way, these cams are made to rev and make high end HP

Andrei

iTrader: (7)

Good info! Thanks ^ So is this red line of 8300 RPM with single valve springs or dual?