xsspeed

also you'll be pleased to know i went down a rabbit hole on engines last night, spotted a contender for someone to tap potential, for a nondescript v8 the 1urfse (lexus ls460) looks like it has potential to apply similar 1nz/4gr logic too assuming those things can translate, geometry is a bit more 2GR so not as rev happy with heavier pistons at 94mm, but 11.8:1 CR, D4S, RR of 1.77

duh i should have just checked dividing it by 60

where 4500fps come from then? for a 4gr with 77mm stroke at 10,000rpm youre looking at 25.6m/s, or 82ish fps

Also, and sorry to fact check,are your numbers right for mean piston speed? I was just doing calcs last night for my rb, using mps=2×stroke x (rpm/60) Top end revs should see around 25m/s give or take. 4500fps is like 1300m/s? Or am I misinterpreting what you're showing?

hey dave whats your estimate on weight diff between the 3s and this? I thought you had said something like 50kg but wondered if youd started weighing anything?

i still cant get over how glorious this thing sounded at full nang

Cheers, yeah not expecting cheap but need to be realistic with budgets, the specific reason for asking is it seems you can pick up dereg silvias/180sxs for a whole lot cheaper than their wof/reg counterparts, the latter i wouldn't bother with as a starting point as there's immediate over capitalisation Long story short, is it once they are off the road that unless you rereg then you're stuck with trailering and no hill climb/on road events? The Log books and authority cards path don't enable you to achieve some sort of road legalness once dereg?

Dunno if this belongs here, but seems best place. I'm itching for a track hack and trying not to blow the bank, the opportunity for better/cooler cars is significantly higher (read cheaper) with something that it dereg. If my aspiration for motorsport is pretty much limited to track days, drags, and hill climbs is this a viable route, really my issue is how can i pass scrutineering in these scenarios with a car that doesnt have a wof. Is the path of least resistance rereg and cert (might not be economically viable), or is there another route where a car can be dereg and appropriately built (msnz spec cage etc) and somehow receive the correct authority cards that allow it to be driven on road for the purposes of an event (hillclimb, not to/from) (also how does one pass a scrutineering in this scenario for any event - provide evidence of msnz spec everything at every race?) - i am going in circles a bit on the MSNZ website which as I read it says cars need a wof and a registration is needed in 8.1 of sched A basically just want to set off on the right track and viability of a dereg rolling body or not really determines which direction i will go

are you on holiday or something, no spiders getting any action

woah dry sump 10,000rpm 2.5 v6 i like it

less material removed? are bores different? more material for strength for those hektik rpms, keep the rods inside the environment

I mean i hate to contaminate this thread again but twenny debt

UJ spec speed holes it is

Kinda weird it has a big boi box

seeing i took us to RFB world I'll spam your thread for a sec as I've been on a similar journey of study albeit slightly different goal I am gathering up last of parts now to see if i can simply stroke an rb20det (78mm piston 69.7mm stroke) by using a rb26dett crank (73.7mm stroke) - will have some stock rods next week so I'll put it together and see physically if the theoretical maths works, hoping to be able to make it work without needing to make use of aftermarket (expensive) shorter stroker rods (119.5 vs 121.5mm). Maths says with a slightly thicker head gasket I can still get around 9:1 static CR. Potential to bore block to say 80mm (could go further) as its probably going to need something anyway being a thrashed twenny debt. Main reason for looking at this is I too love teh rpms but an rb20 is not really setting the world alight power wise and while it will happily take boost it means that power will hit like a train at ~4000rpms and off boost power is a bit shit - i want it to behave kinda nicely as a road car. So I am kind of going the opposite direction on rod ratio but trying not to drop rpm too much, RR goes from 1.74 in a rb20 to 1.64 in an rb26 but i am hoping that in keeping the stock (or stockish) pistons it will be light enough that forces are low in the higher rev range, not shooting for 10k though. One of the big constraints for an rb20det is head flow, In the car right now is a redtop rb20 which basically has TVIS (NICS), I will grab a more common R32 silver top head and I am currently looking at an R34 rb20de neo head as well (which has massive intake ports by comparison, and VCT on intake cam and has its own TVIS kinda thing but likely not used for boosted applications, not sure valves are any bigger yet which is constrained with tiny bores at 78mm - online data is weak so I will measure - I also need to cc the combustion chamber of the head as I cant find if its any different to a 20det, if its less then this will create more of a headache for CR) /RB the world //650 woulda got you 2 barra engines ///I was pipedreaming future track cars and was looking at 2AR and 2GR engines a while back (2AR inspired by your 1NZ work) I feel my pipedream is endorsed by your research and action lol ////ling out - I'll post up my stz in my thread once I have some actual measurements and a direction

same done between rb25 and rb26 re piston wrist pin (rods same length, pistons same bore, stroke slightly different) - pretty common practice between engine family variants i think

All good, keen to see in that engine bay of the CET p10 primera Steven Richards peddled, I see the P11 has a flipped head as per most of the later 90s touring cars Sorry for touring car chat invading your thread romandayf I did like the Volvo, I think it was, that was also using the same location either side of main intake to take ducts down, presumably to other oil/water coolers/brakes Who was talking about low intakes? Speeno? All of these seem to sit high

lush, did you snap pics of all the cars too? would be cool to associate engine bay to particular gen/class of touring car

lush did you rebuild? I dug out a couple of frames the other day that i never got round to finishing when i did my supersport for the original OS bike meat, hmx500 and a standard girls raleigh 20"

Wow, I mean, I know how much you rated that BA

Does anyone have sauce on various engines factory cam specs? trying to find stock redtop/silvertop RB20det intake valve closing angle. /i could be annoying and ask kelfords edit: found via a bootleg manual http://www.turboninjas.com/supra/maft/8 - Vehicle Specific Info/R32 Nissan GTR/All Engine Manual (OCR).pdf

@mjrstar what did you do with the CD009 bellhousing?

Sr20 not that bad?

with your top speed target in mind, has rolling diameter changed a lot from what you ran last time?

SR20 for ease/availability