Need your guys opinion on 2.3 13:1 CR build
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From: Raleigh, Transplanted from Toronto, Canada
ATTN: All ET FanBOI's
GTFO of this thread. If you want rave about ET's products and have your @$$ handed to you by people who have the knowledge then by all means start another thread about it but for the love of all thats holy stop cluttering the OPer's thread up with all this ET man love because no one is buying what your selling.
NO.
ONE.
You are preaching to people that are not going to listen. ET makes products out of unicorn foreskin I get it. Their pistons are crafted out of God's pubic hair. We get it.
ET is the greatest. They rock. THey are the greatest thing since whitebread. We get it now.
Can we tune back to the program we clicked on now, Please?
K, Thx, bye
GTFO of this thread. If you want rave about ET's products and have your @$$ handed to you by people who have the knowledge then by all means start another thread about it but for the love of all thats holy stop cluttering the OPer's thread up with all this ET man love because no one is buying what your selling.
NO.
ONE.
You are preaching to people that are not going to listen. ET makes products out of unicorn foreskin I get it. Their pistons are crafted out of God's pubic hair. We get it.
ET is the greatest. They rock. THey are the greatest thing since whitebread. We get it now.
Can we tune back to the program we clicked on now, Please?
K, Thx, bye
Last edited by SmurfZilla; Jul 11, 2013 at 03:34 PM.
BACK ON TOPIC.....
DISCUSS????
I run big cams with high compression, here is an explanation
yada yada yada
DISCUSS????
A 14:1 or 15:1 boosted methanol motor is totally not the same as ethanol. They have distinctly different properties independent of octane rating. That aside, you can see the "edge" alot faster on a higher compression e85 motor. Lucas now has a 690whp FS635 setup on his 11:1 2.0L and it is obvious in the logs that it is at the edge based on noise. When the car goes back to the stock ECU we'll see what it looks like as far as if it was real knock or not (I have much to say on the AEM "knock" control but thats another thread). I think when we get to turbos that are in the 3586 range of airflow, they are so efficient that 29psi on pump with excellent timing isnt hard. I have run mine out to 32psi recently and it really looks like I can keep going if I didnt mind find the mechanical edge of the stock bottom end. I am sure we can run 13:1 on E98 without much of an issue, but what we do in a racecar versus what a "streetcar" is setup with are entirely 2 different things.
I am very much with David when he says that some of the best combos are not ultra high compression or "high compression" motors. Our 9:1 1G Eclipse seems to make alot safer power on the 4202 than the Evo does at only 10:1.
We have also found that the old hotrod rule of 4% per full point on a given setup holds true. The 3065 car mentioned at the outset made 633whp with 11:1 at 32psi versus the 580ish it made the year before at 9:1. There were some other changes made with respects to reciprocating mass that gave is some additional power as well as a cam change that later got us to 640+ before we were once again out of fuel.
I am very much with David when he says that some of the best combos are not ultra high compression or "high compression" motors. Our 9:1 1G Eclipse seems to make alot safer power on the 4202 than the Evo does at only 10:1.
We have also found that the old hotrod rule of 4% per full point on a given setup holds true. The 3065 car mentioned at the outset made 633whp with 11:1 at 32psi versus the 580ish it made the year before at 9:1. There were some other changes made with respects to reciprocating mass that gave is some additional power as well as a cam change that later got us to 640+ before we were once again out of fuel.
I run big cams with high compression, here is an explanation
The engine only cranks at 450 RPM. large duration cams hold valve open long enough to see a significant drop in air velocity at low RPMs. Thus less gets sucked in a low RPM. 450 is definitely low RPM. Put a small cam in car and watch cranking compression jump to 210 or so.
At high RPMs that long duration now allows more to enter chamber. This making more power at high RPMs.
The reason builders say high compression and large duration cams work hand in hand is because large duration cams give up large amounts of low end torque. you can get back some of that lost torque with the higher compression. second reason is increases in compression increase likely hood of detonation. detonation is most likely to occur at low piston speeds. so an decrease of air velocity (large duration) becomes welcome
At high RPMs that long duration now allows more to enter chamber. This making more power at high RPMs.
The reason builders say high compression and large duration cams work hand in hand is because large duration cams give up large amounts of low end torque. you can get back some of that lost torque with the higher compression. second reason is increases in compression increase likely hood of detonation. detonation is most likely to occur at low piston speeds. so an decrease of air velocity (large duration) becomes welcome
Last edited by Migsubishi; Jul 11, 2013 at 02:39 PM.
EvoM Guru
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From: Tri-Cities, WA // Portland, OR
let me see if i understand this thread thus far - op asks for advice on a 13:1 cr motor, and several very respected members who have had high cr motors tell him its a serious mistake while at the same time et somehow finds about this thread and tells the op he's making a smart move. it even appears that et might be trying to sell him a motor. and the op is still planning to go ahead with it? am i right????
Evolved Member
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From: Raleigh, Transplanted from Toronto, Canada
Naw. OP had the high compression seed by a shop that didn't know he could get custom pistons from any reputable piston maker and to get them from ET.
Once forum members started to tell him, 1). ET is not reputable, 2) Most piston makers will make what you need for way less the ET's unicorn foreskin, and 3). the proposed engine builder obviously doesn't have the experience based on advice given this far.
ET supporters came.out the wood work and hilarity ensued.
Once forum members started to tell him, 1). ET is not reputable, 2) Most piston makers will make what you need for way less the ET's unicorn foreskin, and 3). the proposed engine builder obviously doesn't have the experience based on advice given this far.
ET supporters came.out the wood work and hilarity ensued.
Evolved Member
iTrader: (33)
Joined: Jul 2002
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From: Raleigh, Transplanted from Toronto, Canada
Thanks. I'm not as angry as the post would suggest or imply. Just have low tolerance for BS. My car giving me issues isn't helping what little tolerance I have left.
OP tell us what State you live in so we can get you better help. ET blows, so does the person who wants to build your car. There are numerous shops in the Midwest who could do your car without sweating and it will last!
Whether their parts are truly good is beyond the point. You don't need to reinvent the wheel brother just go with what's proven and you will absolutely not be disappointed.
Whether their parts are truly good is beyond the point. You don't need to reinvent the wheel brother just go with what's proven and you will absolutely not be disappointed.
Last edited by AdrenalineRush; Jul 13, 2013 at 12:45 AM.
Thread Starter
Newbie
Joined: Jul 2013
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From: midwest
OP tell us what State you live in so we can get you better help. ET blows, so does the person who wants to build your car. There are numerous shops in the Midwest who could do your car without sweating and it will last!
Whether their parts are truly good is beyond the point. You don't need to reinvent the wheel brother just go with what's proven and you will absolutely not be disappointed.
Whether their parts are truly good is beyond the point. You don't need to reinvent the wheel brother just go with what's proven and you will absolutely not be disappointed.
Thread Starter
Newbie
Joined: Jul 2013
Posts: 21
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From: midwest
im gonna go with manley turbo tuff rods and stock crank. anyone know hp capabilities on those rods and has any ever been able to make big power on stock crankshafts without engine becoming a crimescene?