Tony D
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Posts posted by Tony D
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All this talk of engines flying around could easily be solved by simply securing them. Properly.
That was kind of my point...
"If we are going to use Darwin Participants as the basis for deciding what parts hauler to buy, maybe they shouldn't be installing their own parts!"
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Nice Smelt!
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Goldfish said it fine---why narrow your powerband when you don't have to?
The ability to take the car through a corner in the same gear over the most rpm range possible will return the fastes time because the car is known to be 'driveable', gear selection becomes less important, you can run more gear out back for better economy or higher top speed, etc...
It's why big V8's are so happy in our little Dattos: they run to 4500 in stock form, but offer scorching performance because of torque. Boost threshold means wider torque plateau.
Aside from that...
You are making the assumption that the turbine side is his problem---it's not,vit's the compressor side's ability to flow more air! (or less air at a given point.) While a .82 housing might slow down the compressor wheel and 'solve' the surge because it's operating with less flow... you also don't make boost, and STILL run out of compressor wheel at the same point.
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I know I got my dually for dirt cheap. Whoodathunkit that I would have put 5000 miles on it this first year alone!?!?!?!
I was figuring half that, IF that!
And I've only spent 20 days in my office this year!
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Is it just me, or does anybody else see that with an "MFP" badge on it, and want to start screaming at the top of their lungs like a lunatic:
"LAST OF THE V-8's MAX!"
Too bad it's a 76, too much hassle for me to bother with for a daily driver... I'll just put the 350 into the Opel GT I got...
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in deference to all this sushi and sake talk, it's 2138 in Kawagoe Japan, so I think I will go have some warm sake and cold sushi myself around the corner from the hotel...
Suffer in the traffic!
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Stonewall is not as bad as surge. Surge is much worse.
I would not make the generalization you made about boost pressure stopping. Stonewall would be more likely to be seen as pressure coming to WG pressure, and as the engine speeds up and sucks more air, you see the boost start dropping off no matter what you do, or you can't make more boost when turning up the WG dialaboost thingamajig.
If you are using less flow than the turbo produces, you will be able to boost more, until you surge.
If you are flowing well, the turbo should technically be able to flow more as it speeds up, as it has a non-linear production rate...but if it can't keep up then you are into stonewall.
Most manufacturers give a PPH or Horsepower rating for their compressors. When you are near the HP maximum, or beyond it...chances are you are nearing a stonewall point. On a GT35R with a restrictive head, you might start surging at 25psi, and see the dyno do one thing, well below 600 HP (Minimum Flow Surging for the pressure being attempted.)
With a good flowing head/cam like JeffP's, you will see the engine make say 658hp at 21psi, but nothing more at 25... Matter of fact, the power peaks at a slightly lower rpm, then plateaus almost flat as the RPMS cross 7000 onwards (whereas at 21psi the plateau didn't start till 7400 rpms)... This is the compressor not being able to flow any more. Not a flow restriction issue, a compressor delivery issue.
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A Pickup can have an unsecured engine come through the back window just as easily as an unsecured engine can roll around in a van. At leas the engine will hit the base of your seats, instead of being valuted to the back of your head.
Seriously, if we're using Darwin Award Contestants as our models of propriety for parts hauling, then they shouldn't buy anything and leave the car work to prefessionals.
Most Cargo Vans are sold these days with heavy steel or mesh partitions for 'work vehicles'---more of them I see than trucks with a protective covering over that 'whack da back o my haid winder'...
Besides, you can fit more in the van, I had close to 13 feet of laydown room in the back. Ain't gettin' that in no pickem up truck! Plus, when you're in the junkyard, nobody can see whats inside...
Having had $10,000 of tools ripped off makes you cognisant that something without windows and a steel partition preventing ingress from the passenger's compartment just might be a good thing...
Anybody here had stuff go missing from your truck bed while parked at the junkyard? (Raises Hand)
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If you are going to a larger cam and ported head you need the larger housing. That small housing at 25psi is choking the hell out of that turbo. People do this same crap in the 350z community. Tiny turbine housing on a gt35 and can't figure out why they can never make power past 5500-6000 rpms. Or they use a turbonetics kit with a 2" down pipe and wonder why no more power after 4500 rpms. I say larger housing and use the 38mm gate. Or if you use the smaller housing you need a bigger wastegate, probably an external gate.
A GT35R on a 3.5 Liter and a GT35R on a 3.0 Liter are two different things. JeffP's making 658+ to the wheels on a GT35R at 7500rpms...
"Choking the hell out of it" might be an opinion, but I wouldn't state it as fact...
Most of the time cars fall flat on their face at 5500-6000rpms is because they are using some permutation of stock cam timing. If you are throwing boost at it, you will make hellacious numbers with hellacious boost, but not above that point.
All you do with a larger A/R on the exhaust housing in narrow the powerband. A .63 A/R on an L28 will kick in at a boost threshold of 3400 like clockwork and make full boost. And pull to 7500+ if you have the cam and headwork to accompany it (till you stonewall the compressor section).
But run that same car with a stock cam, and you still come on at 3400, and run to 5500-6000.
Now, put a .82 on there. First example now starts with a boost threshold of 4500 rpms, and will pull till the compressor stonewalls at the same point, around 600-700 HP at 7500-8000 rpms. Result: Narrower Powerband.
Second example, boost threshold is now 4500, and pulls to a peak at 5500-6000. Result: Narrower Powerband.
With the numbers being reached, airflow through the compressor is nearing maximum. It's not a bigger A/R on the turbine side he needs for more power, its more flow from the compressor side of the equation. Though admittedly the flow at only around 380 HP should not be anywhere near stonewall. Nearer to 700hp, you're stonewalling, the compressor will physically not flow any more air thorough it, you need a bigger compressor.
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Moby Van: White Chevrolet G30 Cargo Van, no windows. Amazing what they can carry, 2 L28ETs, 5 FS5C71B Tranny's, Two People, and a complete array od test and diagnostic equipment for Atlas Copco Dry Screw Compressors...
Not only can you haul parts, you can cavort around preschools and highschools looking for victims in total anonomyity...
Kinda like this, but less obvious:
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Curiously, I'm wondering what you're going to do about the VIN, since the RHD firewall has one on the right side, and the LHD one is on the left side...
This just now occurred to me...since the RHD Dash doesn't have one at all...
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I use the piece from a 280Z, and simply cut the piece that goes into the socket that fits on the firewall if needed. It allows you to use the same piece whether you are using DCOEs or SU's. It's a two piece design, which telescopes. You can make it fit almost anything!
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Spraying onto the port wall builds a puddle, the aim of the EMS is to keep this puddle consistent so as to have proper fueling during transient activities. When you rapidly open the throttle valve this 'tau' layer of fuel will evaporate rapidly and then afterwards create a transient lean spot. The 'accel pump' feature of many ems compensates by using rate of throttle position travel to preload this wet layer for the ride through of rich-lean-injector lag time... When you have a wet puddle there, it has to be there or you will have a heluva time getting the mixes right.
As long as the puddle remains constant in size, AFR's will remain stable. The trick is at lower openings is when the changes of throttle angle are the most severe and the flow differences effecting the puddle can be drastic. This is where sequential shines.
As long as the puddle on the runnner remains CONSTANT, it will not affect you---it's like it wasnt' there. You will be able to run and tune around it...it will make cold starting easier, but hot restarts slightly more difficult (depending on time after shutdown of the hot restart). I read a nice article by a guy from GMI about this puddle effect and how it works, it really made a lot of sense from the standpoint of understanding why the aftermarket EFI stuff does what it does. Basically his statement was you make the puddle, then you maintain it. The closer you are to keeping the puddle the same size all the time, the better the car will run and drivability will not be affected.
Really, these cars won't smoke black out the tailpipe till low 10's in the AFR... visual clues of smell and smoke are llong since gone for real tuners, you need instrumentation.
Sealing of the injector tips is a cheap check: the seals are $3 at Autozone, buy a set find out and post the results. The Stock stuff goes around the pintile higher up than you think. I have taken standard o-rings and slipped them on the pintile cap and had them seal just fine. It's pretty forgiving, like BRAAP said, they float, all you need to do is apply a little pressure and they seal. For $3, for the whole set of 12, even if you are throwing the big body units away----why not try and put it to rest for certian?
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Altering the timing events has a drastic effect on lower end torque. An adjustable cam gear and some dyno time will maximize your power using a stock cam and some tweaking to get the torque curve down lower in the RPM range.
BTW, what is that on your bonnet? It...loooooks like....a Lincoln...Continental......hoood ornamentation.....
Hmmmm, and L28 Powered Truck... This could come in Handy in the USA. I will make a note of it, and put it on the list with the DOHC Opel Engine to put in the container...
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'As high as 8000' huh?
As I recall, someone with good knowledge on the subject said if you are breaking cranks on the tail end, look at how you're fastening your flywheel bolts!
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Did they? If G&K did the certification, it DOES NOT mean ANY RB complies, only those with the G&K AUTHORIZED Emissions Package on it complies.
No car is "Exempt" from smog, they are just "Exempt from Bi-Annual Testing"...
There are classes of vehicles which are Exempt, but generally speaking, if you have a regular plate, you need to comply---you ARE at any time subject to compliance testing! If you fail that test, you go into whatever program they deem required, gawd help you if you blow 'gross polluter'!
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"Maybe take a look at Joseph Needham's re-discoveries if you want to know more. "
I think Frank needs to read Mr. Needham's commentary about 4X4 traction before giving the Dutch Claim to it...
The European "Golden Age" of DaVinci et al made a blossoming after the Chinese Delegation visited Italy in the early 1400's hoping to gain tribute from all the nations on earth. If they were too inept to find them, they gave them maps (sorry Chris Colombus!), and books on how to make all sorts of stuff. When you start comparing the blatant plagarisim of 'The Masters' from the Chinese Texts provided during these visits, all of a sudden the concept of "European Design" takes on a different meaning.
Hell, my "Asian Studies" Cirricula actually comes in handy! LOL
Needham... he he he... I feel so glad someone other than me used that Reference. I liked his concept of the "sleeping historical textbook interpreter"... Seems he picked up some particularly Asian Traits being there so long. I believe it was the Europeans that decided that a guy could only legally have one woman once 'married'...
Great invention, eh? NOT!
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Backstraps are outside all fecal zones...
I watched a deer get hit and spun around by a logging truck in Michigan's UP. Happend about a 1/2 mile in front of me, and the deer went DOWN! Cleared the shoulder, and was dropped dead.
Here I am, with the wife and kid in the 2+2 towing a small trailer with 40# of freshly-bought ice in the cooler. First thought through my mind was 'FRESH!'
I was having visions of quickly field dressing the deer, packing hte internal body cavity with ice to rapidly drop the temperature (it was Late June) and then proceeding on to the next Sheriff's station for the permit...with the goal of arriving at my father-in-law's house within 2.5 hours with a Venison Feast ready to string up in his garage and pack into his deep freeze. The boy could shoot his super soaker out the hatch to keep the fur wet and proivide evaporative cooling as well...
The Z starts burbling as I start slowing down. My wife says "What are you doing?"
Deer!
She remains silent, I start pulling onto the shoulder.... "What are you doing?"
We got 40# of ice, we can pack this thing off and have fresh venison tonight at your dads!
"NO!"
What?
"NO!"
But, you ate this stuff all the time growing up! It's your dad that got ME doing this, and you're not going to get anything fresher than this! I't a clean kill... (pulled up and stopped by the carcas, only head damage, maybe some bruising on the hindquarters, truck out of sight by now, didn't even slow down...) I mean, you aren't going to get anything better than this!
"NO!"
(Son) "Oh, dad! The deer! The deer!"
Come on honey, it's the perfect opportunity to teach the boy about waste-not want not, and opportunity raising it's head. Plus he needs to know how to field dress a deer.
"No, not now, not on this deer!"
(My look of puzzled frustration, wifes look of 'I'm not changing my mind, DRIVE ON!')
Argh, my mouth was watering thinking about dinner as I saw it get whacked. It was like taking food out of the mouth of a starving man. I was not happy...
Fecal contamination is only a factor if they get balled up under the truck and spit out the side. Then it's only good for dog food...
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You will notice a high interchangability of componentry in the '10 Series' of cars, 110, 510, 610 ,710, 810...
As for being 'inferior' that is debatable. It was a different marketing segment, and it's where the 432 got it's engine from... Skyline was a Prince racing tradition well before the Z was...
And now, unfortunately that faction has won and once again the Skyline is the flagship performance brand of the company. The Z is just a market-nice competitor set up to do battle with the mustang and other such swarf. Not a bad thing in istelf, I just lament the passing of the Z as the flagship sports model in the USA.
One world, one brand, one flagship.
Now, off to eat a steaming delicious serving of lucious lobster claws in Louisiana...
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if it's holding 9psi to 6500 with the controller out of the loop, and then you reinsert the controller into the loop and have a creep issue...
My bet is the controller is the issue.
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The taste of the game is directly related to it's forage. If all it eats is sagebrush, guess what it will taste like? Cornfed venison is darned tastey and doesn't have the 'gamey' taste of the deer I've tasted in TX or CA.
As for that freezer comment, unless you got a BIG family... you ain't eating a 180# whitetail in one sitting. And a 1500# elk? Fagedaboudit!
I know people in MI that eat roadkilled deer ("I check under their shoulder, and if they're still warm, I'm taking the backstraps and tenderloins at least!" K.D.) on a regular basis. Sure fresh is great, but legally that's not possible unless you're a true scavenger...
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Ditto with what Nick said. Nice to see it going to good use.
I am at an internet cafe in the middle of Mindanao, Philippines. Nick emailed me about your progress and I had to take a look!
Bastard...
If you see Valeri or Jenny say hello for me!
I was supposed to be in Manila last month, but the job fell through. Now I'm headed to Sendai for maybe a couple of weeks. -
It's not really a Rayjay kit, that's only the turbo it comes with...
I'm thinking it may be an early BAE or possibly a Janspeed kit out of Holland.
It's not a Crown, for sure.
BAE and Janspeed liked those early boost restrictors. Hell, some of the EFI BAE setups used similar things! (Shudder.)
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What the hell is the 'screamer pipe'?
If you held the wastegate closed are you saying it's still doing the same sound, same thing? I don't know where my original post went from earlier today...
Stonewalling is when you are out of compressor flow capabilithy and the turbo won't flow any more air. It makes no noise, you just see your injector pulsewidth, powerband, and everything just flatten off.
You shouldn't be stonewalling at 15psi on your setup, the compressor won't stonewall until probably 20-25psi at higher rpms, like 7000+
JeffP's GT35R will make power to 7000+ rpms at 20 psi, but then 'goes flat'.
At 17psi, the power peak is still climbing to 7500+ rpms before flattening out.
He does not readily accept my blunt statement of "You need a bigger turbo, Jeff!" Matter of fact, I believe his last reply to that statement was... er, I can't print that, but it involved an impossilby disgusting sex act with myself and the costs involved in a GT40 or 42...
But he knows I'm right, especially if he wants to keep making power to 8000+ rpms.
Heh heh heh!
Utility Vehicle - Haulin' parts
in Non Tech Board
Posted
Truthfully, I have a smaller "Harbor Freight" trailer, the 1/2 sheet size one...
Diamond plate over a double 3/4" plywood deck and an 1100# capacity. It easily tows behind the Z, and I've taken it across country at illegal speeds (12" wheel version!)
I put tie downs on it, and I can fit two engines (L28) on it, and strap them down tightly. It's actually pretty darned handy when I got to go to work and don't feel like burning 10 gallons of gas to get there and back just to stop by the yard and pick up the odd engine or tranny. Keeps it out of the back of the Z and I get 4X the fuel economy!
But it won't load up for the 'big half-price day weekend parts buying extravaganza" like the old Moby the Molester Van did!