buk9tp

I like that manifold a lot.

crx2fast

thats bad *** my friend

mugenjibz

lmao

Tom-Guy

Yes, which is what BLAAST said. BLAAST also said your turbo was crap. I would like to take this opportunity to agree with BLAAST. Thank you, thank you very much.


Uhh, factory turbocharged vehicles melt down engines when their KS stick the ECU in a feedback loop. You need to stop deluding yourself and realise you aren't dealing with anything nearly so well-thought out or robust as a fifteen year old factory turbo ECU? Said fifteen year old ECU has *correct* timing maps and the KS as a safety precaution, whereas your ECU keeps ramming timing forward to check - Yep! Still detonating!


But, anyway, the cleanliness of your setup almost makes me forget the QR25DE is a worthless engine with rods smaller than a D15. Almost. :P

Big J

Thanks for the compliment........ But all the chinese parts are getting upgraded: turbonetics, HKS, stainless steel, new piping, new intercooler, new silicone and t-bolt clamps, new oil lines, ect.................... for free....................and I'll pocket some cheese............ so the build cost now = $0, upgrade cost = $0, getting money and free parts out of building a turbo for your car = priceless.

HiProfile

DAMN YOU! You beat me to the punch. :P Nobody else here really seems to have a grasp on how crappy the QR25DE is. Even if this area had some really shitty shipments pop up, it still doesn't explain the people I know who's Nissans have been at the dealer multiple times for engine failure. Busted rods, spun bearings cats, etc. Just make sure you can put it back together just like stock when it goes. When you get a poorly designed porduct with a warranty, their 'good faith' should be abused to teach them a lesson.

I'd just suggest trying to toss a rod through the block actually, then sell the replacement block and use the apparent sponsorship you got to build that 'dream qr25 of yours'. I guess you're not too worried about being slightly over budget now, are you? :P

Tom-Guy

Yah, they are almost as shitty as the new Honduhs. They do a good job as daily drivers, though, if you don't miss a shift.

Anyway, I like the simple cast turbo manifold a lot, it's pretty sweet and looks like it can support a good bit of power. Upgrade the internals, do something to address the tuning, and I'd rock it over any 01+ Honduh in a freaking heartbeat.

Big J

It's easy to compare an QR25 to a honda d series if you ignore the fact a d series has been around for 20+ years and has quite an aftermarket.

Yes the motor has a SHITTY rod to stroke ratio, but the rods are forged. Bad tuning will kill this motor quickly, but the same goes for most motors right? The motor puts down about 160 WHP and 160 WTQ stock, it'll handle increased power output safely to the 300WHP mark, which is about an 87% over stock increase. 5 psi on a t3/t4 50 trim will yeild full boost around 2800 rpm and power output bewteen 240-255 WHP WTQ, 8psi 270-280, 10 PSI 300+. This is with a stock ECU, SAFC and larger injectors, that's been the standard tuning from the get go.

An NA QR will let go because of the high piston speed the motor sees. But add forced induction and increased resistance on the exhaust stroke due to increased exhaust side pressure and the motor will see less inertial forces acting on the exhauxt stroke, where the highest inertial loads occure on any motor.

There are people running 500 WHP with built motors that have experienced 0 transmission problems or stock axle breakages, try that in a Honda.........

The cylinder head flow 15% better than any SR head, and with a cam on bucket design the valve train is stable to over 10,000 RPMs with the right springs.

It's not a honda motor that has parts interchangability with so many other honda products, and swap/hybrid parts are availible off the shelf for a lot of them. 0 for this motor. There is one with an SR crank swapped in, custom everything else that makes 503 WHP and revs to 8700, but $$$$$$$

I'm waiting on the service manual for the new spec v to come out. The motor has a fully counter ballanced crank, larger rod journals, longer rod, improved cylinder haeds and cams, and a factory redline of 6800 or 7000. I'd love to swap the crank into an old QR and possibly the head............ that's what I'm waiting for.

CspecRun

I miss 2nd to 3rd in mine at least once a week and I haven't had any problems yet...actually I bought my Spec the last week of May/06' and it had 28k miles, it's now Feb.07' and the car now has 40,700 miles and still no problems. That's 13k miles in 8 months, I can't complain...

Tom-Guy

Ah, no. I was comparing the QR25DE to a K20A.


After the entire history of FWD Nissans and their fragile transmissions, with zero exceptions until (according to you) the QR25, I'm not going to buy that, sorry.

B-series gearboxes are still retained by 50% of the pro race teams at the 1000 whp level, and more than one team has fielded stock axles in the 500-600whp range or pushed a stock longblock into the low tens. D-series are considered even stronger by, oh, Bisi---------moto, after you ditch the aluminum shift forks and weak stock diff. Don't confuse mistreated high mileage ---- in the hands of ignorant riceboys for how ---- works in the hands experienced men.

Kinda funny how you go from saying how all engine internals and turbo manifolds are 99.7% custom pieces, meaning real world factual Spec-V knowledge is slim to none, to tossing out all these 500 whp rides exist and are OMG JDM bulletproof in the driveline area. You know better than that. Spec-V is every bit a cheap econobox as a Civic Si is, and no "sporty" FWD four cylinder econobox exists that comes with a driveline that can handle 500 whp without massaging, or repercussions. On fresh suspension (it's a five year old car, tops, that's minty fresh) and street tires the wheelspin will protect the gearbox and you might lay a portion of the 500 down in the upper gears from a roll, where the stress on the gearbox isn't anything close to what it would be hooking up out of the hole on a set of meaty slicks.

The honest truth of big power or racing is that ---- wears out, even robust ----. Name one fluent car, engine, transmission, rear end, etc, you care to claim as bulletproof and I can netsearch fourteen pictures of mechanical failure in under thirty seconds. Face facts, while some really sweet rides don't get the press they deserve, there is a very distinct reason a lot of ---- doesn't get built and have aftermarket support.

Hope you don't take me the wrong way - I really really really like your ride - but you're painting a biased picture based on zero facts, because you love your car and don't think logically about it, and are being fed a line of hype by other people who love their cars and don't think logically about them.

I was referring to the K-series shitwagons. Log onto Honda-Tech.com and click any third post in the K-faggotry forums for carnage pictures where the engine internals reduce themselves to pieces smaller than your thumbnail. I'm not even kidding. Heavy slug perched on a ----- rod riding a D-series size rod bearing - worthless.