how much tuning should i expect to do when i raise the compression in my 2.2 ecotec? will hp tuners help with this or is the ecu going to compensate for the higher compression?
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ok i was thinking about going about 11 or 12 to 1 compression ratio. i know that i'm going to need premium gas and a big pocket book.
is raising the compression ratio going to need more tuning than going with boost? i'm just trying to decide wether i want to go with boost or stay N/A.
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Not necessarily...Depends on how high you take the compression though. Boost raises your compression ratio as well. You might have 8:1 to 9:1 pistons and still have a higher dynamic compression in a boosted motor than a NA motor with 12:1 static compression pistons. Boost fuel curves are different than NA curves (especially turbos) because as RPM's increase, VE increases as well, which means even more fuel. You don't change the VE of a NA motor with a piston change because you are still displacing the same amount of air. You are only increasing the power output by increasing the pressure inside the cylinder to combust.
So essentially, typically a NA motor is easier to tune than a boosted one.
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so what you're saying is that i'll have more options tuning boost as far as horsepower goes than if i stayed NA? and can an NA motor reach the same potential as a boosted motor for the same investment?
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Samuel Fortin wrote:so what you're saying is that i'll have more options tuning boost as far as horsepower goes than if i stayed NA? and can an NA motor reach the same potential as a boosted motor for the same investment?
well, i know of an NA motor that runs 12's. 11's with nitrous. and i think its even streetable. what do you think?
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Samuel Fortin wrote:so what you're saying is that i'll have more options tuning boost as far as horsepower goes than if i stayed NA? and can an NA motor reach the same potential as a boosted motor for the same investment?
no. boost owns. it is THE replacement for displacement. you can make an NA monster, but it will cost much more.
boost FTW!
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the lemur wrote:Samuel Fortin wrote:so what you're saying is that i'll have more options tuning boost as far as horsepower goes than if i stayed NA? and can an NA motor reach the same potential as a boosted motor for the same investment?
no. boost owns. it is THE replacement for displacement. you can make an NA monster, but it will cost much more.
so you're saying that boost is the lazy mans way, so to speak, of making more power. i know it's a generalization and that it is fairly involved as far as tuning goes.
i would like to stay NA on premium gas(around here it's 91 octane 92 is prettyrare). i'm looking for around 300 hp at the crank. i think it is a reasonable goal. i will be getting hp tuners at some point as i near the end of the build. so i may decide to tune fof no2 at a later time after i read more on that subject.
i have a basic plan of attack for the build,
eagle rods
high compression pistons
bates engineering valve springs
port and polish
thats what i got so far, i welcome suggestions from the more experienced builders on the board.
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doubling the power output of your motor is never....easy unless its done with nitrous, boost is not any easier than going NA, im some ways its harder because of the amount of extra parts you need to buy to support it. Turbo timers, intercoolers, intercooler sprayers, boost controllers, etc. NA your just replacing the parts that are already there with higher quality purpose built components.
As stated higher compression whether it be from boost or from component changes internally runs a higher risk of detonation which can be avoided with timing changes and higher octane fuel. From a tuning standpoint boost is harder to tune for, theres more to compensate for and more variables to consider.
Download yourself a copy of the Gm ecotec build book if you havent already , they list all the part numbers of what you need to beef up your motor and its wrote by the ppl who built the 1000HP drag cars so you can trust the information and specs to be accurate
As for cylinder heads a nice option is the Patriot stage 2, its preassembled and you dont have to do anything but put it on the car and it will be awesome for whatever you throw at the car , boost, high revs, whatever
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i have a paper copy of that book. it's great for certain things.
i'll do a search on the forum for the patriot stage 2 head. i also have a couple other parts i have to research. does the patriot head come with cams?
thanks guys.
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you can get it with cams installed but they are just stock ones, the level zero triflows work well , the fastest NA eco uses them
as far as boost the comp cams are AMAZING at providing quicker spool ive observed them drop the rpm to reach full boost by nearly 800 rpm on QBE's car
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Rodimus Prime wrote: the level zero triflows work well ,
Who makes these? and how much are they?
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