Only a few carry E85, even here in the Corn Belt. The higher octane of E85 allows us to either increase the compression ratio of an engine design, or put in more timing into the tune to raise horsepower. The availability issue for street cars precludes a higher compression ratio so that pump gas can still be used in a pinch.
On gasoline, engines run best when the air/fuel ratio is 14.7:1 (14.7 parts fuel to 1 part air). Ethanol and E85 have a lower optimum air/fuel ratio. In order the get the same power your engine will need more Ethanol (or E85) than it would gasoline, because gasoline has more energy per unit of mass than biofuels or mixtures do.
May 04, 2005 · I have built 2 VW engines with compression above 8.0:1, and both had heating issues. From personal experience, I will never again build a daily driven street VW engine above 8.0:1 compression. But just for the record my dedicated drag race engine has 11.27:1 compression running 108 octane race fuel, with over 150 passes and going strong.
According to Wusz, even given the cooling effect of E85, his recommendation would be to limit the static compression ratio to 13:1 on a 4.00-inch bore small block and slightly lower in a larger bore engine like a big block Chevy.
Jun 09, 2020 · A high compression ratio makes more power off boost, but it doesn't speed up spool by any significant amount. The car will be much more fun with low compression, smaller turbo (FP 68HTA, FP Green or similar) and 23 psi on that forged bottom end.
Those kind of compression ratios are possible for street turbos engines on ... E85 or racegas may like more. Chamber heat goes up with more comp + boost. More intercooling is required ... The very best is water injection for highest total compression, but for best power adding Methanol to the mix is even better. The charge can be intercooled ...
Dec 29, 2020 · I agreed, and soon I was driving a 2020 Nissan Altima 2.0 Platinum FWD VC-Turbo sedan, a top-of-the-line example with a base price of $35,180, and an as-tested sticker price of $38,840 – a ...
Gas, E85 and alky with both compression ratios (just because I can). I am looking forward to gaining knowledge of how they each compare at each of the compression ratios. I have Hilborn pills (flowed by Gene Adams to make sure they are right on the money) and a mix of Kinsler, Hilborn and Crower nozzles. an increase in compression ratio nor modification of inlet valve closing timing, such as the Mazda Atkinson-cycle engine (Weissler 2011). One more solution pathway to increasing efficiency is variable compression ratio, wherein the engine operates at high compression ratio at lower loads and switches to a lower
It would work out best for my application if the ends of the adapters were 1/4 NPT female, as one of the most common port variants on good quality, heavy duty pressure transducers are 1/4 NPT male. Some are Schrader, depends. So LMJD, in your 30+ years as a diesel mechanic, what was the max pressure you saw during any diesel compression test?
12:1 will not just enable more power for any given RPM it will allow the motor to make peak power at a higher rpm, therefore the gains will be two fold. 11:1 runs out of steam at somepoint from a dynamic cylinder pressure perspective. 12:1 will run out later.. and the Ferrari 458 has 12.5:1 compression and thats cool.
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Dec 29, 2020 · I agreed, and soon I was driving a 2020 Nissan Altima 2.0 Platinum FWD VC-Turbo sedan, a top-of-the-line example with a base price of $35,180, and an as-tested sticker price of $38,840 – a ... For instance, in a naturally aspirated car with a 10.0:1 Compression Ratio : 145 psi = 14.5 * 10 Or in a turbo car with the unreasonably high 10.0 compression ratio with 10 psi boost : 245 psi ...
A high compression ratio and turbo engine would tend to require premium fuel and would squeeze the most power out of any given displacement. This is really elementary, no "data" needed. All of the above being true, I'm not advocating for using premium fuel if the manufacturer doesn't mention anything about it.
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Sep 15, 2017 · It’s the gold standard for engines with super-high compression ratios or forced induction. While we could advance the timing curve on the Miata by 3 additional degrees, we used 4 percent less fuel because URT 105’s higher density equates to more energy per gallon.
Apr 30, 2008 · It can be from any manufacturer, configuration (4 cylinder, V8, etc.). The purpose is to get ideas for high compression ethanol engines all rounded up into one place. The idea behind the higher compression ratio engine is to improve the performance and efficiency of engines built to run E85 exclusively. I'll go first: Ford 4.0L V6 OHV.
Lower the comp ratio with a saver shim, not ideal but worked well on my 1.4 turbo, 1mm should be ok Use the 1.8 turbo bottom end, good for 200bhp, as it has shorter rods use the std comp ratio and run low boost and a bigger turbo. Its flow not pressure that makes power MLS gasket will help lower comp ratio, but as said not by enough to notice
Oct 31, 2020 · The 2010 Porsche 911 Turbo was launched at the same time with the Cabriolet version at the 2009 Frankfurt Motor Show. Due to its 500 hp and the all-wheel-drive system, it was a four-seasons supercar.
Some four-cylinder strip turbocharged engines can top out at a compression ratio of 11.5:1 or more when running alcohol or E85. Even the average high-performance street or strip turbo four-bangers are running a compression ratio of 9.5:1 to 10.0:1, far superior to the ‘good old days’ when 7.0:1 was considered stellar.
Apr 15, 2013 · The fuel's octane rating can be increased further with octane boosters. The very best is water injection for highest total compression, but for best power adding Methanol to the mix is even better. The charge can be intercooled after the supercharger, thus increasing the allowable total compression.
I have a built motor with 8.5-1 compression manley 2618 pistons and manley turbo tuff rods. I am running a tdo6sl2-20g kunigawa turbo with a large FMIC. I feel like I am not making enough power for my setup: 22 psi, E85, 355 whp/381 wtq per romraider dyno.
The following areas will be covered in the Turbo System 102 – Advanced section: Wheel Trim, Turbine housing A/R and housing sizing, Log style vs. equal length manifolds, Compression ratio with boost, Air/Fuel Ratio tuning: Rich vs Lean.
The Infiniti QX50 debuts revolutionary new engine. The 2019 Infiniti QX50 is powered by a revolutionary variable compression engine that aims to deliver the best power and efficiency in one package.
Jun 11, 2012 · I thought of E85 but just not that readily available yet where I am. Cheers for a turbo 6 set up you need 7.5.1 cr.or even a bit lower.lower static compression ratio is always better than higher static compression ratio.if you want to run at least 114mph at the drags you will be building another motor really quickly with 8.5.1 or more c/r ...
Higher compression engines are more efficient and depending on the compression ratio can have a BSFC as low as .38 to .42. The average street engine usually runs about a .5 BSFC, so that is the figure we use for naturally aspirated engines.
Aug 21, 2020 · You can run higher compression on a 2.3 but you either have to run the boost down on pump gas, or you have to run better fuel (e85, alky injection, race fuel, torco additive, etc.) to prevent detonation. Plenty of people run 9:1 or 9.5:1 on race gas or E85 with 2.3's. With pump gas you're better off leaving it around 8-8.5:1.
“There is more to gain with a stock, naturally-aspirated car by adding and tuning for E85 fuel than just tuning a stock, naturally-aspirated car on pump gas,” he said. “On a naturally-aspirated setup, we have seen a 20-25 horsepower gain with E85. This is mainly due to E85 working with the LT1’s high compression and cylinder head design.”
E85 has less potential energy compared to gasoline, which is why mileage suffers with E85, but we're using it for its other benefits. 11/17 Running the supercharged 383 on 114-octane race fuel ...
A Dish Top style piston will effectively lower your engine's compression ratio by removing material from the top of the piston in a circular, "dish" shape. They are primarily used in boosted (supercharged, turbocharged) applications where low to medium compression ratios are desired.
Wikipedia explains everything best: Research Octane Number (RON) The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.
Dec 22, 2020 · You will need to tune up the engine including spark timing, compression ratio, and fuel-air mixture to enhance the power and improve the timing. The fuel brings a dramatic improvement to the timing of a car without the use of methanol or race gas. With the right tuning, it is possible to make nearly 100w HP difference on E85.
I don't think thats the case, So far i can only find 12.5:1 as the highest compression ratio. using E85. I have read that the 15% of gasoline added to E85 ethanol will very the octane. from 90 to 105octane.. that is alot of veriation from pump to pump.
Do not use E85 in a pre-2009 6.2L. The injectors are not sized for the higher flow rate needed for E85, which only has 70% of the BTU content of E10 gasoline. So, when you go WOT with E85 on a 2007-8 6.2L, the injectors go "static", meaning they never close. This washes the oil off the cylinder walls and causes erosion damage to the cylinder bores.
Nov 08, 2018 · The VC-Turbo can operate with a compression ratio as low as 8:1 for maximum performance or as high as 14:1 for maximum efficiency. The engine can even switch to the more efficient Atkinson cycle ...
High compression doesnt really matter if you run high octane fuel, E85, or meth injection. you can inject E85 and trick your motor into thinking its running 150 octane fuel. There are lots of ways to run high compression.
Mar 05, 2013 · Hello Dave, for best spool the GT06 turbo would be the best option for you. You can expect to get around 50hp with 0.4 bar / 6 psi boost. The GT06 should start to spool around 4-5000rpm so it will give you a very good powerband. You would need to run either E85 fuel or do water / methanol injection if you can't drop your 12:1 compression ratio ...
Compression ratio for the fuel: In the case of SI engines, the compression ratio of the fuel is in the range of 6 to 10 depending on the size of the engine and the power to be produced. In CI engines, the compression ratio for air is 16 to 20. The high compression ratio of air creates high temperatures, which ensures the diesel fuel can self ...
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Step 6: Calculate the PSI to compression ratio. Calculate the PSI to compression ratio. For example, if you have a manometer reading of about 15 and your compression ratio is supposed to be 10:1, then your PSI should be 150, or 15×10/1.
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