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| john_g |
May 15 2013, 07:29 PM
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#1
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Member ![]() ![]() Group: Members Posts: 110 Joined: 1-November 12 From: british columbia Member No.: 15,100 Region Association: Canada |
I'm getting ready to rebuild my 2.0 and am considering going to either 2056, or maybe even up to 2270. What are the downsides or problems associated with going 2270, if any?
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| r_towle |
May 18 2013, 01:15 PM
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#2
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Custom Member ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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I recall some testing that showed the intake runners and throttle body would support up to 2.4 liters.
It was quite a while ago when I looked really hard at this, but one of our resident science guys did some calculations and the intake system will support the airflow. Maybe someone could work on those numbers again that can remember thermdynamics.. The djet may be the issue that you experienced, but I believe the physical intake system can handle the airflow. I remember you tried and found the system to be to weak for your goals and what you want to build. For me, the goal was different. how big for how little money was the objective...I believe I have achieved it, now I am curious to see what I can trick Djet into doing... I have read to many stories about Megasquirt and how it does not seem to work right...or its finicky, or some other reason it cannot be tuned... I figured, why not take the Djet system to the next level. Heck, its the preffered method for alchohol based drag cars...so maniold pressure can and does deal with large aggresive camshafts, and lots of overlap....but it may just be a matter of some technology to smooth out the curve properly. I have found a few manifold pressure sensors, but not like the one we use, something more modern. Just a napkin idea that another buddy and I came up with on how to replace the MPS with a more modern setup, and have the ability to tune it for a larger motor... I know your motors put out the maximum... a 2.4 pushing 150hp, without getting to hot, is a fun car. Not looking to break the bank, do external cooling, nor get near 200hp. Looking for a fun car that can be streetable, fun at an autox, and a bit unique. Heck, if I did not like tinkering, I would sell the car. Rich |
| rwilner |
May 21 2013, 01:07 PM
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#3
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No Ghosts in the Machine ![]() ![]() ![]() Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
I have read to many stories about Megasquirt and how it does not seem to work right...or its finicky, or some other reason it cannot be tuned... Rich As you know from my experience -- MS isn't plug and play, but it's the most cost effective way to squeeze out all the power from our engines IMO, simply because it can adapt to various configurations and be tuned....especially if you control fuel and spark. Now of course I am no expert, but once it was running (with help from you, Chris, and Mark), it was running better than my tired old D Jet ever did. /hijack over |
john_g 2.0 Rebuild Advice Needed May 15 2013, 07:29 PM
r_towle More work, worse rod ratio than a 2056.
Higher cha... May 15 2013, 07:40 PM
john_g Why would there be a higher chance of ring wear? I... May 15 2013, 10:49 PM
Jake Raby Rod ratio is no worse if the engine is designed co... May 15 2013, 08:59 PM
john_g Jake,
Isn't heat an issue with the 2270, as we... May 15 2013, 10:48 PM
john_g Another issue, in addition to the questions I have... May 15 2013, 11:52 PM
KELTY360
Another issue, in addition to the questions I hav... May 16 2013, 02:39 PM
john_g I'm running the stock EFI system.
Another i... May 16 2013, 05:18 PM
porschefile2010 From my experience and having stuffed one engine a... May 16 2013, 12:16 AM
rwilner FWIW -- I went through this decision process last ... May 16 2013, 06:10 AM
r_towle Djet can handle more displacement, just not more s... May 16 2013, 07:35 AM
john_g Thanks, Rich. I must be a little slow, can you cl... May 16 2013, 09:52 AM
r_towle
Thanks, Rich. I must be a little slow, can you c... May 16 2013, 11:33 AM
john_g Thanks, Rich, I get it now.
And yeah, I've ha... May 16 2013, 05:20 PM
AE354803
Djet can go up to 2.4 liter with the 71mm stroke... May 17 2013, 03:25 PM
r_towle
[quote name='r_towle' post='1865025' date='May 16... May 17 2013, 09:22 PM
Porschef If I may chime in... I replaced my defunct 2.0 wit... May 16 2013, 10:47 AM
Jake Raby Its been over a decade since we had any thermal co... May 16 2013, 09:25 PM
john_g
Its been over a decade since we had any thermal c... May 17 2013, 09:36 AM
Jake Raby
Its been over a decade since we had any thermal ... May 17 2013, 02:36 PM
john_g
[quote name='john_g' post='1865450' date='May 17 ... May 17 2013, 05:30 PM
Jake Raby Adding all that displacement when keeping the stoc... May 18 2013, 12:18 PM
914_teener
I have read to many stories about Megasquirt and... May 21 2013, 01:49 PM
Jake Raby
Of course you were. May 18 2013, 01:42 PM
r_towle Not everyone needs to follow you jake, we all have... May 18 2013, 07:35 PM
Jake Raby
Not everyone needs to follow you jake, we all hav... May 20 2013, 07:43 PM
gothspeed To the OP, a 2056 or 2275 each have their virtues ... May 18 2013, 08:11 PM
rhodyguy 1. dave hunt had nightmares trying to get even a m... May 22 2013, 10:08 AM![]() ![]() |
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