|
|
#421 | |
![]() ![]() ![]() Drives: 2013 Camaro convertible 2SS/RS Join Date: Sep 2014
Location: Southern NH
Posts: 1,077
|
Quote:
|
|
|
|
|
|
|
#422 | |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,346
|
Quote:
__________________
Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
Last edited by oldman; 01-12-2018 at 10:45 AM. |
|
|
|
|
|
|
#423 | |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,346
|
Quote:
Edit, I just read the article "Our first stint was in a blazing Orange Fury Metallic GT equipped with the six-speed manual and the optional Performance package, which for V-8 models adds tauter suspension, Brembo six-piston front brake calipers, more robust engine cooling, a Torsen limited-slip differential, and Michelin Pilot Sport 4S performance tires—255/40R-19 front, 275/40R-19 rear—on black-painted aluminum wheels. Our car also had the optional Active Valve Performance Exhaust and new-for-2018 MagneRide adaptive magnetorheological dampers—technologies that have been available on the sixth-gen Camaro since it hit the market for the 2016 model year. If you can’t beat ’em, match their mufflers and dampers. Thundering along Mulholland Highway and Latigo Canyon Road, the GT was impressive in its impassiveness. Steering feel is a bit distant, but it dives for the corners with razor-sharp precision and scythes through bends with zero drama. The car was pinned to the road as if pressed into it by the great engineer in the sky, seemingly tethered around the torturously tight turns—which allowed us to pin the throttle aggressively even across pavement heaves. ". Edit the second test, which to my mind really shows the engine change as it is a manual, basically says at least for the M6 the more powerful engine yields NO usable performance as verified by their test, you do get some unusable performance (on the street) during the top end charge: "In testing, our six-speed manual transmission (a 10-speed automatic is optional) matched the zero-to-60-mph time of the outgoing car at 4.3 seconds but opened 0.3-second and 3-mph gaps through the quarter-mile with a 12.6-second run at 115 mph. By 150 mph, the new GT was 2.4 seconds quicker. " So as I stated before I even new this test existed, that much of the 2018's performance is more A10 and tire related. I stand by that. The review tends to bare this out as this M6 performance pack is lack luster. I'm more in love with the Pilots and the A10. "Cornering grip rises slightly to 0.96 g (we saw 0.94 g in the old model) thanks to the GT Performance pack, but that’s just a number. It wasn’t until we took the GT through the Angeles National Forest that we learned how it has adopted the stability and willingness of the GT350. Body roll is tightly checked, the magnetorheological dampers glue the tires to the tarmac without brutalizing the ride, and the Michelins give more warnings than a TSA officer. Even the electrically assisted steering reacts naturally and has pleasing heft. "
__________________
Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
Last edited by oldman; 01-12-2018 at 10:47 AM. |
|
|
|
|
|
|
#424 | |
![]() Drives: 66 Chevelle 8:02 @174 Join Date: Jan 2010
Location: Texas
Posts: 195
|
Quote:
I’ll contact Ford and tell them they put the piston in crooked from the factory. Next one that comes in locked up, missfiring or knocking before I tear it down I’ll get your expert opinion on it since you’ve never heard of them having valve issues. My 30 years with Ford and heads and short blocks being on backorder mean nothing. |
|
|
|
|
|
|
#425 | |
|
Banned
Drives: 2013 GB GT Join Date: Mar 2016
Location: Florida
Posts: 954
|
Quote:
if you're going to post pictures of motors that have had valves issues at least try to find some where an amateur mechanic cant easily determine the valve wasn't the cause. |
|
|
|
|
|
|
#426 |
![]() Drives: 66 Chevelle 8:02 @174 Join Date: Jan 2010
Location: Texas
Posts: 195
|
[QUOTE=FastCarFanBoy;10039739]so... you ordered a new head and were going to bolt that motor up and send it on its way?
if you're going to post pictures of motors that have had valves issues at least try to find some where an amateur mechanic cant easily determine the valve wasn't the cause. My thought was that the valves broke, hit the piston and bent the rod, guess I was wrong. Ford just built that one with a crooked piston in it, I should have just straightened the piston instead of putting a short block and a new head on it. I’ll contact Ford and let them know they’re not putting pistons in straight. Thanks for your help. |
|
|
|
|
|
#427 | |
![]() Drives: 2019 Camaro ZL1 Join Date: May 2017
Location: Vancouver
Posts: 154
|
Quote:
![]()
__________________
1987 Camaro V6 1988 Camaro IROC Z 1993 Camaro Z28 1999 Camaro SS 2017 Camaro SS |
|
|
|
|
|
|
#428 | |||
![]() Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
|
Quote:
Last edited by Nabush; 01-13-2018 at 12:00 AM. |
|||
|
|
|
|
|
#429 |
![]() Drives: 2017 2ss, m6 Join Date: Jan 2017
Location: Iowa
Posts: 231
|
You know the best thing about threads like this...at least all of us real car guys know that all the wannabes will be in here arguing while we are at the track. All the mustang I've raced against were driven by cool people that loved cars and racing...Not some fanboy that just wants to run his mouth. Of course most of them had GT350's that were paid for so maybe it's a class thing with the cheap mustang bringing in the bottom feeders...?
|
|
|
|
|
|
#430 | |||||||||||
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,346
|
Quote:
Quote:
An OHV makes more power per external size, more power per weight, a lower center of gravity (unless we are talking ME 109), more power per cost, is rebuildable, has a much broader and significantly higher torque per external size. All of these details are engineering elements. Never once said that you can't. Since there is no design criteria as HP per liter, who cares? It is canard dreamed up. You keep tossing that straw man out there. I don't know why? I could easily argue the usefulness of DOHC engines and not once bring up a calculated and meaningless parameter. Quote:
Basically you claiming an engine designed per an unknow to me set of rules is superior... to XYZ Clearly a 1200 HP V8 OHV could also be built for the "rules". The discussion is on drag racing and 1/4 mile. Please let me know when 900 HP million dollar V10 DOHC become dominant at local drags. ![]() Rules unlimited, that why I brought up top fuel... it is all large displacement OHV. Basically most drag racing from run what your brung to top fuel is large displacement OHV because of the design and engineering parameters list above. Cost, rebuild, easy to work on, less exotic material, dependability, more HP per size and weight, more torque per size and weight. But always interested in F1, Austin has F1 and these engines are all hybrid based with hybrid forced induction systems. I will conceded right now that electro magnetic technology will replace DOHC with actuated valves http://www.launchpnt.com/portfolio/t...valve-actuator Or even individual runner electric turbos controlling everything no throttle body, no spark, a compression ignition gas engine via IR electric boost. Quote:
Add in fuel injection, variable speed supercharger, meth injection. Then on the Kurt Tank Ta-152 you get N2O injection and 2 cannons in the wing and 1 huge cannon in the nose. Many people think it has a radial engine, but it was a inverted V12. But anybody that really cares knows it not DOHC engines that won the war (sorry P-51) it was the old OHV, cause it was just plain BIG internally per external size, yes a design criteria : https://en.wikipedia.org/wiki/Wright...Duplex-Cyclone So no rules, need to win a war, biggest engine that fits the chassis wins. Quote:
![]() Quote:
Note if you are NOT interested in what DOHC is used for in a modern engine skip: I'm familiar with many DOHC engines, Honda, Toyota, Volvo most of their engines use variable overlap for either cold start up emissions or in the case of Toyota to implement Miller / Atkinson cycles. Volvo for instance has variable overlap only on the exhaust via cam phaser and that is only to dump raw fuel down the exhaust to light the cat so the engine can pass CA ULEV2 standards. Honda AFAIK only uses I-VTEC in only one engine the K20z with about 500 cars to date sold for actual increase in HP. The K20z in the average Civic uses I-VTEC which does vary one cam in both phase (the I) and the lift: VTEC, only to induce swirl into the chamber for smog by shutting of 1 or the 2 intake valves. Once again it is a smog issue. The exact same technology is use world wide to implement lean burn, but alas not in the US cause of smog. I absolutely agree that a DOHC engine is better to dump huge quantities of raw fuel down the exhaust port to make the engine just a smiggen clean, and if that is done to every car in California ULEV2 or ZPV, and with that smiggen decrease it would equal the toxins emitted by a very small village in Nepal's mopeds. Once gain the technology is being used for smog. The only engine (outside of the Type R) that I know of and I that used overlap and lift for performance it the GM design (IVLC)in the Impala http://media.gm.com/media/us/en/gm/n...takevalve.html Quote:
Quote:
Quote:
Every case you have brought up is because of a rule favoring engine displacement.... yet you can't see that. Oh well I tried. Quote:
Are you playing dumb ? I'm talking about after market support, not stock engines. I pretty know the Z06/ZL1 as I almost bought one before ordering a GS.... I guess I am more than playing dumb you claimed there was a warrantied supercharger HP for cheap on the 2018 GT, I was all set to buy. But alas it is some heavily qualified warranty, that you still have not supplied the link to. I merely point out that GM for the masses is supplying a relatively affordable supercharged solution on an OHV engine bumper to bumper even. This drastically undercuts your argument about warranty and forced induction being somehow favoring DOHC BTW. Looks like for this topic affordable bumper to bumper supercharged performance is only available from GM on a OHV V8. I guess no link is coming for the affordable warranty supercharged 2018 GT. I was all set to get one. Quote:
So no youtube does not equal a SAE certification. For me I'm 99.99% sure the new 5.0 makes 460 SAE HP, and care little about crayon charts. But please, I'm actually interested in seeing an dynojet SAE corrected run of the new 5.0 I have no doubt that youtube has all sorts of STP, Hub, eddy current, crayon charts are easy to produce and as stated a Unicorn is a horse. You list your qualifications, I've sent you a link to what a SAE certified engine is. Somehow you take youtube wheel or hub or who knows, call them caryon dynos as some sort of indication that that the new 5.0 is somehow making more HP? OK then.
__________________
Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
Last edited by oldman; 01-13-2018 at 01:45 PM. |
|||||||||||
|
|
|
|
|
#431 |
|
Banned
Drives: 2013 GB GT Join Date: Mar 2016
Location: Florida
Posts: 954
|
you wont see a DOHC in Top Fuel because they arent permited by the rules.
|
|
|
|
|
|
#432 | |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,346
|
Quote:
http://www.hotrod.com/articles/hrdp-...ump-gas-drags/ Nutshell, simple rules: drivable, on gas, who wins? OHV. If I was not a big DOHC, I would not have followed the Supra to see if he could bring it, he can't. Will the new 5.0 with crazy mods be at the 2018 pump gas shoot out, I hope so. Will DOHC dominate say in 10 years? dunno I doubt it. Why do I doubt it? The engine has 4 inch bore centers, meaning that there is all kinds of heat and sealing issues. Why does it have 4.0 bore centers? simple cause DOHC engines are so friggen huge externally, if the engine had 4.4 bore centers Ford could only put it in a large truck. Also there is crankshaft whip issue with a small bore center engine at high RPM as the harmonics creep up and down the shaft vs less bearing area (mains are seated between bore centers). So there ya go. Reasonable cost performance favors the bigger short block with more cooling and sealing, with more main bearing surface and less need for RPM to make HP. From Honda racing there is a max of 9500 PEAK RPM for shot durations like an autocross on a 86mm stroke engine (27.233 meters / second). Any further increase in RPM results in the breakdown of the oil film of the piston and bore. Ford is pushing 93 mm with the Voodoo, looks like the at 8250 RPM (25.575 m/s), quick number crunch 8800 RPM PEAK for shot durations (27.1 m/s) is the limit, Ford is really close to oil film breakdown stock. So a really crazy NA build that could incease peak HP and RPM would be limited to oil film to 8500 RPM with a fuel cut at 8800 would wield a build of 526 HP x 1.13 increase in engine speed breather = 600 HP. Sure this is a ball park figure, but you can see there is a limit to a 4.0 bore spaced engine. For grins the LS7 has a 101.6 stroke so give the same max piston speed: 8500 rpm for 27.s m/s, clearly the LS7 even in its most wild configuration is not going to hit a piston speed issue. As an aside the limit to a OHV engine without cam in cam technology or some sort of rocker arm VTEC would be the ability to idle, given a 7 liter LT1 engine and maintain some drivability say 700 to 750 HP, depending on one's definition of idle and drivability. Pray is already pushing 600 WHP on what would appear to be a daily driver, Katch is at 707 STP engine HP on a 7.0, so I'm probably pretty close. Maybe with the Victory JR head and kooks headers could get a little more. Basically take the intake flow number x2 = engine HP. Take away the limit is not the breathing it is the stroke and it is going to get really hard to get more HP. Hence Ford has hit two dead ends: can't bore, and can't stroke. The OHV engine is just fine. Hence just about any discussion about the 5.0 has to turn into but if you add a supercharger.. cause they (5.0 buffs) have no other option. http://www.chevyhardcore.com/tech-st...the-winner-is/ So for a drivable engine on a $10,000 build the Coyote is about 520 HP, say 550 HP on the new direct inject. A 7 liter texas speed crate engine is about 700 HP. Torque of course follows, at no time will the Coyote put out more peak torque vs the minimum torque of a 7.0 over its applied band, which is really important in an autoX. huge bucks 5.2 DOHC build I'm saying 600 HP is a nearly impossible wall to climb due to oil film issues, no matter what the dyno says. For the LT1 OHV, it is idle and driveability at 700 to 750 HP, maybe a little more with E85 and Victor JR heads, and way way way way cheaper. That is an impossible gulf to swim. Sans FI, on the street it is going to be HARD to beat a LT1, Ford engine too weak, Dodge is too heavy. Like I stated a while back there was a REALLY quick Mustang at the drags I went over to see what was under the hood, thinking 351C or 460, something, nope LS engine. Actually I would absolutely love to see a NA, 9000 or 10,000 rpm DOHC V8 drag engine. Note due to the stoke and oil film AFAIK you won't see a 5.0 or 5.2 doing the same RPM on the AutoX, unless it is trailered in and engine toss every once in a while.
__________________
Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
Last edited by oldman; 01-13-2018 at 03:19 PM. |
|
|
|
|
|
|
#433 |
![]() ![]() ![]() ![]() ![]() |
Another MT screwed up H2H. What we really want to see but no one has done it yet and on a road course:
GT350 vs SS 1LE it's going to be close GT PP2 vs SS 1LE even a better match |
|
|
|
|
|
#434 |
![]() ![]() Drives: 2018 SS 1LE Join Date: Apr 2017
Location: North Jersey
Posts: 778
|
|
|
|
|
|
|
|
|
|
Post Reply
|
|
|