Jump to content
SAU Community

Recommended Posts

hey guys. im hopfully going to be able to get a hold of another set of cams soon so i can send them off to a cam shop to get regound.

what lift and duration are you guys using?

basicly the specs of the engine is:

rb30 block with 25de pistons and 25vvt head.

10.4:1 compression.

custom headers, 2.5" exhuast

wasted spark ingnition.

soon to be fitted:

2x xf throttle bodys and intake pipes or new airbox.

plug in link ecu

also if i do end up taking the head off is there anything else you would reccomend?

at the moment im about 125rwkw

my aim is 150kw+ peak power at about 6500+ if possible.

cheers

the standard cams can only be mildy regrounded.

standard:

240º and 7.8mm lift (from memory, don't quote me on that)

and from what i read somewhere on here ages back, you can get them reground to:

inlet: 255º and 8.2mm lift

exhaust: 258º and 8.2mm lift

if you do take the head off, maybe see if you can:

- deck the block or head a little to bump up compression

- port and polish

- cam gears

- extrude honing??

- thinner head gasket

- also check for piston vs. valve clearance.

stock cams are 240 degrees duration with 7. 8 mm lift

Ive got pretty much the same setup to you, with twin standard throttlebody's and a surecam reground cam with 255 degrees duration and 8.2 mm lift, and adjustable cam gears, with UNTUNED SAFC2, had it on the dyno yesturday, got 150.9RWKW on dr drifts dyno.

my power peaked at about ~ 5500-5800rpm and dropped nearly 10kw by ~ 6500rpm (all guesstimates as rpm was not shown)

Though i think this may be due to an exhaust restriction (only got a 2.25" cat in it with press bent 2.5" exhaust, to be fixed very soon) and it was a bit rich up top (about 12.5:1 the reading was - there was plenty of black smoke after 5000rpm) gonna be tuned as soon as i get the exhaust redone/heat wrapped and hopefully new extractors.

Edited by SKiT_R31

oh true. hmm sweet as..

i guess i will needa have a good think about this..

i need to decide between that regrind or somthing like tomi poncams but at double the price i think ill go with regrinds....

oh true. hmm sweet as..

i guess i will needa have a good think about this..

i need to decide between that regrind or somthing like tomi poncams but at double the price i think ill go with regrinds....

worked out my dyno graph the other night (translated kph to rpm) peak power was exactly 6000rpm, peak torque exactly 5000rpm, it held its power for about ~ 300rpm, then from there it lost about ~8rwkw to limiter (set at 6800rpm).

so i was off by about 300rpm in my guesstimation

i reckon with a few things and a good tune hopefully it should hold its power to limiter

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • My dream is also to have a proper hoist, but I don't think it will ever happen. My quickjack is probably as close as I'll ever get, it really is very good though. 
    • Yeah we keep on in the dailies, it is pretty poor how many animals get hit and the driver leaves without checking....have saved a couple of little ones over the years. Bit of a gruesome job though, pouches generally need to be cut open because they are so tight and often the joey doesn't realise mum is gone so they are still locked onto the teat. I checked the modules in front of the DS wheel where an oil cooler should go.... There is the radar unit - that can go for race use) One of the 2 HX water pumps, the silver cylinder. That needs to be kept but might be able to be relocated But the bad news, the big computer mounted vertically in front of the wheel (blocking any potential air exit) is the electric steering computer. That is required until/unless i do a hydraulic steering conversion, and in CAD based modern car design it is not like I can just pop a big unit like that somewhere else (plus the loom would be too short anywhere else too). So, the passenger side is OK to clear out (just use a smaller washer reservoir, potentially elsewhere), but the DS no beuno
    • Well, all the best with the new camry It was interesting to hear about the UK process, it is generally a lot more streamlined here with a shipping agent looking after all the import side (noting the exact final price can still be a surprise.....) and I've used a few different brokers on the japan (or US) side, and never had any trouble with any of them....luck of the draw I guess. You mentioned you didn't get the auction sheet (understandable since you bought it from a dealer, not auction), but I always try and get hold of that because they are pretty thorough. I've imported 2x R grade vehicles over the years and both were fine, repairs in Japan are pretty thorough compared to here in Oz.
    • BTW I measured the jack I have, it is 70mm at the saddle but you only have about 700 until it returns to 150mm high at the cylinder so it is good but no magic bullet.
    • My experience with Rising Sun Exports Before agreeing to the sale I tried to do as much research as I could (obviously), his Facebook reviews are 98% and he goes Live at least once or twice a week. I contacted 2 people in the UK who had used him for their imports, both had positive feedback. His explanation and talk through of the import process was thorough, answering any query no matter how stupid it was. It felt as soon as the money was sent, communication dropped off. I asked for shipping updates every 2 weeks or so, not wanting to pester him, he never had any updates. I wasn't informed the car had been dropped off at the port, I only found out by his Facebook story. I asked for the photos taken at the port, knowing he would need some for insurance purposes. I received a few 5 second clips and that's it. When asked again, he said his staff had them. Weeks later I asked again, he tells me he doesn't have any, but does have 50 photos from the original advert. I never received them. I eventually got the documents sent via WhatsApp after I mentioned the port was requesting them. I purchased a CarVX report, to find out the vehicle is a Grade R with recorded accident damage, first recorded in 2017 when it was first auctioned. He never told me the grade, then again I didn't ask. His response was "Grade R means nothing, it wasn't chassis damage". Still, I would have liked to have been informed about it. Jon prides himself on being open and honest when it comes to inspecting cars, it's his main job doing so at the auctions for customers. When the vehicle arrived in the UK I noticed a few little cosmetic issues. It's a 21 year old car so it wasn't going to be mint condition. The side skirts are cracked on each corner and the sealant is failing. The front grill on the bonnet/hood isn't secured very well, mounting studs are missing. Both minor things, but again, it would have been nice to be told. During a Facebook Live walk around video of the vehicle, he mentioned it has a front Whiteline anti roll bar/sway bar. While on the inspection ramp, I noticed the stock item has been installed. When first questioned, his response was "the ARB? Switched? Since when, it never had them". Since sending video and photo evidence I've not received a response. I'm probably being over critical of the overall condition of an old car, but all I wanted was honesty (which he claims to have). I'm aware I wasn't his only customer, he's busy doing XYZ but other reviews praise him for great communication with regular updates and photos, I felt I didn't receive the same treatment. 
×
×
  • Create New...