Its just a big little dose of intellectual property knowledge,a motor is a air pump motors dont pump hot air.So at the biggining of exhaust cycle my exhauss gases dont contact any engine metals till they are 60 inches outside of motor,leaves motor cool and can run leaner burns larger volume of air with no unstable detonation.Wen i tell dynos car is all diferent they like most say "not possible" they tune tail pipe to their known tablesand we both see dud results. I like to ask how can things work! tell me more! Its great to be open minded it lets you learn.
marmatt,
Apr 18, 1:06am
so whats your a/r under boost !
doug207,
Apr 18, 1:25am
Hang on a tick. your exhaust gasses do not contact any engine metals till they are 60 inches outside of the motor! That's physically impossible. How do they leave the motor, yet not touch it, then touch it from 60 inches away! That's like saying I slapped my missus from down the street after I walked down the street without touching the street.
bigfatmat1,
Apr 18, 2:38am
omg what a load of crap sounds like his exhaust gasses miss the turbo as well. lets lower cylinder wall temps create hot spots on pistons have cold exhaust gasses that don't touch anything or create boost and lean the car out to gain more hp and tail pipe emmisiions have nothing to do with whats happening in side the engine yeah right and tune ya car with someone that knows nothing about engines good one.
xacoon,
Apr 18, 2:48am
this thread is amusing, its like saying I had a couple of lousy roots, so all women must be crap in bed, going nothing but internet porn from now on.
xacoon,
Apr 18, 2:51am
ahhh and a 253 has a pretty restrictive factory exhaust system. doesnt matter how cool you keep the cylinder, its just not going to be able to flow the full 750. I agree that it is a trick question though, holleys arent efficient at all.
xacoon,
Apr 18, 2:54am
that just sounds like the basic tune was abysmal. nowt to do with the dyno the guy obviously cant basically tune a car.
ginga4lyfe,
Apr 18, 2:57am
hmm sounds like someone doesnt like paying for a good tune, and not doing homework before selecting a tuner, because its pretty a damn good effort for a dyno'r to tune and blow the engine,unless the engine build quality was ratcrap
xacoon,
Apr 18, 3:03am
you know you should get your butcher to build your engines, they arent influenced by all this "chinese whispers" bollocks that the auto trades subscribe to.
mrfxit,
Apr 18, 3:05am
LOL agreed on this bit . "holleys arent efficient at all."
mrfxit,
Apr 18, 3:09am
toxicgreen. . If the amount of air & fuel going in didn't really matter, then I could hook up a petrol bowser pump & a 5000psi air compressor to my Bluebird , also running the std factory exhaust system & expect the engine to run happily at a very high performance level.
toxicgreen.,
Apr 18, 6:12am
Theres two ways to get more power from a motor. 1 engineer everything at a high price for minimal gain8-15% power gain or 2 Do wat is said cant be done, alter volummetric effeciancy30-45% gain, Fuel stabilityis a set figure goes like this 91 octane will handle 210psi at TDC, is 11:1 comp rate at 900 degrees surface temps you have stability,, if you raise the 210 psi =detonation,, or go in bigtime, drop the 900 degrees figure to 500 degs an the rest of the equation does not applie or restrict
toxicgreen.,
Apr 18, 6:28am
problem is a hot cylinder at 900 degs repels the incoming air so none of us get much of a fill, but my cylinder is 500-600 degs ,it still repels air but a lots less thanyours.At BDC 500 degs each molicule is preheated/expanded less and there are more of them,,then flamefront comes thro same temp as yuo guys 1500degs, and the exchange rate/exspansion differance is better.
toxicgreen.,
Apr 18, 6:41am
Not a load of crap,,i just stopped all heat conductivity until 60 inches away from motor then 60 inches down exhaust the gasses thro a hissy fit cause they have not been unloading heat and hissy fit starts a 1st 2nd 3rd crasy burnout so wats read at tail pipe means nothing
skin1235,
Apr 18, 6:48am
was going to ask re turbo and 60 inches, but thought well maybe he has ceramic lined plumbing etc, ceramic blades in a ceramic body as a hairdryer too, the rest of it appears to be fantasy, repells air and 500 degree vrs 900 degree etc turbo is a restriction in the plumbing, it will retain heat by slowing down the flow while doing it's job a severe port job and stubs for pipes will cool it better, sound better, won't make it run better, and cook everything under the hood too but hey the theory is right - cooler air in = more air in = more power out, and the ECU will need retuning to suit, it is tuned for nana driving or perhaps a little better than nana but not a lot, you could go so far as to say all ecu's could be tuned for advantage on every vehicle leaving the plant, not sure where the power/longevity curve will be after that though of more interest is the alluded to comp geek trotting out his lappy, finding a plug that fits and accessing the ecu - and being able to access the system suffice to alter major settings, are you saying my good old notebook running xp could live again with the right cable, I could put a few dyno shops out of bus. must drag it out from behind the door and charge the battery, the old v6 misti may even become economic to run again
toxicgreen.,
Apr 18, 6:48am
Plain comppression gauge get motor hot pull out one spark plug take off injector plug run car on three cylinders an max boost it 7psi boost gives me 225psi in cylinder, factory had car as 8psi was 196 psi, i shed the heat at the cylinder and increase density So now 7psi is huge to me(225psi)
skin1235,
Apr 18, 7:05am
dream on, you starting to lose the plot now, ( what revs are you pulling to get 7psi boost - - and you have a plug out with a comp tester squeezed in there) either the engine still has ignition it which case if will fire on the other 3, no compression reader can give valid readings under those circumstances, or no ignition and only one plug out ergo the comp readings will be all to hell, it sure wont make 7psi on a non running engine ie cranking only so the engine is running to achieve it I get what you're saying re colder charge, more air, therefore more gas, therefore more power, the extra power is due to the more air and its load of more gas, you have modified the exhaust so the more power may not inherently mean more heat (as it normally does) , now to back it up you have to park your impression of how much more power and take it back to the dyno, the hp atw will tell you - the figures re compressions above are theory, they may be true, they may have increased etc but checking them the way you describe is not worthy of getting excited about - they are unreliable
saki,
Apr 18, 7:06am
what ecu are you using!
toxicgreen.,
Apr 18, 7:17am
Gone back to basics with ny new man on the job, hold one psi boost on slight hill open fuel 12 by 12 boxes while steady in one box swing fueling both richer and leaner, wat feels best is kept,then jump to timing boxes an do the same takes about 3 min to tune a box and we,ve done things as minimal boxes during NA running and realy complex and and busy thro the turbo range, got about 60 boxes to tune there
toxicgreen.,
Apr 18, 7:23am
I have comp gauge with spark plug thread on end then the one removed plug is bolted to block an sparks like normal ,injector plug removed means no fuel runs on 3 cylinders and boosts 7 psi full throttle4000 rpm, sure its not nice to run a engine 1 cylinder down but as a one off it gives me info
saki,
Apr 18, 7:25am
S o Randall edgall tony Marsh of nz v8 etc and all the v8 super car teams have got it all wrong
skin1235,
Apr 18, 7:33am
at 4000 rpm all you can get is 225psi! apart from the fact that such a way of checking comps is completely random, the results will be too you having some success with tuning on the road, and feel it is improving the response etc, I'd go with that senario and leave out the comp figures etc, and then when finished with all the 'boxes' have a quiet think about where you have shifted the curves to, how long will the turbo last, how long will the valves last, how long will the pistons last there a dam good reason why dragsters have 2 minute engine life expectancy, they tune for peak power and to hell with what it cooks on the way, can you afford a new engine every weekend
toxicgreen.,
Apr 18, 7:33am
They proble have it right,, on a motor that does corrospond correct info from header pipe to tail pipe,thats where my motor different tho heat in my exhuast triggers off extra burns an then more reburns,,,, theres nothing left at tail pipe to read so dynos enrichin an flood motor so they can get a reading at tail ,Why are most readers set that wat iv done cant be done! Shes a done deal at my houseNo lethargic throttle now.
toxicgreen.,
Apr 18, 7:46am
4000rpm is wat it takes wen running on 3 , with 4 cylinders running is 3300 rpm an boost is 7psi with big volume, normal car engine will hold max of 240psi in cylinder before spark or blow by occurs My 225 at 7 psi is safe butdensor an applies expansion to piston for more of its traval, 91 octane is unstable over 210 psi but i get 225 an no detonation. Drag motors run sacrificial motors that are exposed to blowby and detonation for 6-9second bursts,thats why its a matter of short time till somthing collapses
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