Low compression piston recommendation - Page 2 - SRT Forums

D-SRT · 12-08-2012, 09:44 PM

Quote: Originally Posted by SRT4 R

can you even get that much low compression piston?

yes, why couldn't you? lol

I have 6.8:1...

D-SRT · 12-08-2012, 09:46 PM

Quote: Originally Posted by boots

There is no reason to go that low in compression, have a good tuner tune the car and won't have issues.

110% agree.

**SRT-Diesel** · 12-09-2012, 12:24 AM

I run 7.0:1
Not a single issue with knock, ever.

loroku · 12-09-2012, 01:38 AM

the only reason to be running that low of comp is 4bar of boost and an 80mm turbo with no intercooler, a bad tuner and 87octane fuel

**SRT-Diesel** · 12-09-2012, 09:07 AM

You clearly do not know what you are talking about...

tunerlover3 · 12-09-2012, 12:33 PM

You can have anything made for the right amount of money.

D-SRT · 12-09-2012, 01:05 PM

Quote: Originally Posted by loroku

the only reason to be running that low of comp is 4bar of boost and an 80mm turbo with no intercooler, a bad tuner and 87octane fuel

Grade A internet tuner here.

loroku · 12-09-2012, 01:19 PM

Quote: Originally Posted by SRT-Diesel

You clearly do not know what you are talking about...

then please explain why you chose to run such low compression?

loroku · 12-09-2012, 01:24 PM

Quote: Originally Posted by D-SRT

Grade A internet tuner here.

i was exaggerating a bit but i have not heard of any benefit of going that low not to mention if you street drive car at all, your losing vE and fuel mileage goes in the toilet.

D-SRT · 12-09-2012, 01:45 PM

Quote: Originally Posted by loroku

i was exaggerating a bit but i have not heard of any benefit of going that low not to mention if you street drive car at all, your losing vE and fuel mileage goes in the toilet.

i lost no mpg going from 8.5 down to low compression. stop with the internet theorem, before you get stockpiled with chief for people to ignore.

tunerlover3 · 12-09-2012, 01:49 PM

People go with low compression that want to run a lot of boost and lots of timing.

You could either build an engine for lots of boost/timing and low compression or build on engine with generally lower boost/timing and higher compression.

All depends on what fuel your using, what your tuner wants, etc.

D-SRT · 12-09-2012, 01:52 PM

Quote: Originally Posted by loroku

then please explain why you chose to run such low compression?

Because 4yrs ago, there was no such thing as a diablo sport. Dropping money for an AEM at a premium price at the time wasnt an option.

i was strictly 91octane, big turbo, and a piggyback...that was the best option for me at the time.

4yrs, going on 5yrs now at over 500hp the entire time on the same engiine...how many folks on this board can say that...ill thank the low compression for that.

with dsp's and ems being so cheap now and capable of having full control of timing, i wouldnt do low compression again, but i dont regret my decision at all.

loroku · 12-09-2012, 02:03 PM

k just from my knowledge the only reason to go that low was for low octane to increase the tuning window.
im surprised you didn't lose mileage did you do cams at the same time?

loroku · 12-09-2012, 02:21 PM

to the
op reduce your ignition timing and you will be able to run more boost especially with the meth

**SRT-Diesel** · 12-09-2012, 04:49 PM

I'll never have to worry about knock, especially on e85. The only "knock" I get is because my cams are so noisy. I plan on turning off the knock sensor completely. I may not make as much power at 30 lbs as these guys that run a 8.5 or higher, but I won't ever have a limit on the amount of boost and timing I can run and still make power.

12-08-2012, 09:44 PM	#16 (permalink)
D-SRT SRTforums Member Join Date: Aug 2010 Member Number: 80561 Location: monterey Posts: 660	Quote: Originally Posted by SRT4 R can you even get that much low compression piston? yes, why couldn't you? lol I have 6.8:1... __________________ Pumpking. 10.71@140. 1st SRT in TENS in CA. Thanks to: TUNED BY MINDMELT101@DRAG-ON Tuning. - http://drag-ontuning.com/blog/ GOKEY RACING for anything fabrication related instagram for updates and pics: m_santiago37

12-08-2012, 09:46 PM	#17 (permalink)
D-SRT SRTforums Member Join Date: Aug 2010 Member Number: 80561 Location: monterey Posts: 660	Quote: Originally Posted by boots There is no reason to go that low in compression, have a good tuner tune the car and won't have issues. 110% agree. __________________ Pumpking. 10.71@140. 1st SRT in TENS in CA. Thanks to: TUNED BY MINDMELT101@DRAG-ON Tuning. - http://drag-ontuning.com/blog/ GOKEY RACING for anything fabrication related instagram for updates and pics: m_santiago37

12-09-2012, 01:38 AM	#19 (permalink)
loroku SRTforums Member Join Date: Aug 2010 Member Number: 80621 Location: janesville wi Posts: 295	the only reason to be running that low of comp is 4bar of boost and an 80mm turbo with no intercooler, a bad tuner and 87octane fuel __________________ Sold My Soul for a Neon pm me for all your HID retrofit needs *TIRED OF YOUR EGO HARD DATA IS MORE IMPORTANT AND USEFUL TO OTHERS SEEKING KNOWLEDGE AND THOES WANTING TO ADVANCE THE PLATFORM* DONT GET STUCK ON PRECISION TURBOS AND BWS THEY ARE NOT THE END ALL........ OTHER GREAT OPTIONS EXIST DO SOME RESEARCH DON'T BE A SHEEP Last edited by loroku; 12-09-2012 at 01:45 AM.

12-09-2012, 12:33 PM	#21 (permalink)
tunerlover3 Fresh Meat Moderator Join Date: Dec 2009 Member Number: 76568 Location: Chicago Posts: 16,617	You can have anything made for the right amount of money. __________________ Diablo CMR tuner ~Dan~ 2004 Black Neon SRT4: E85 stock turbo SOLD 310HP 436TQ 2004 Eblue Neon SRT4: E85 5558 XXXHP XXXTQ

12-09-2012, 01:05 PM	#22 (permalink)
D-SRT SRTforums Member Join Date: Aug 2010 Member Number: 80561 Location: monterey Posts: 660	Quote: Originally Posted by loroku the only reason to be running that low of comp is 4bar of boost and an 80mm turbo with no intercooler, a bad tuner and 87octane fuel Grade A internet tuner here. __________________ Pumpking. 10.71@140. 1st SRT in TENS in CA. Thanks to: TUNED BY MINDMELT101@DRAG-ON Tuning. - http://drag-ontuning.com/blog/ GOKEY RACING for anything fabrication related instagram for updates and pics: m_santiago37

12-09-2012, 12:24 AM	#18 (permalink)
SRT-Diesel Premium Member (Lifetime) Join Date: Sep 2009 Member Number: 75019 Location: Princeton, TX Posts: 1,138	I run 7.0:1 Not a single issue with knock, ever.

12-09-2012, 09:07 AM	#20 (permalink)
SRT-Diesel Premium Member (Lifetime) Join Date: Sep 2009 Member Number: 75019 Location: Princeton, TX Posts: 1,138	You clearly do not know what you are talking about...

12-09-2012, 01:19 PM	#23 (permalink)
loroku SRTforums Member Join Date: Aug 2010 Member Number: 80621 Location: janesville wi Posts: 295	Quote: Originally Posted by SRT-Diesel You clearly do not know what you are talking about... then please explain why you chose to run such low compression? __________________ Sold My Soul for a Neon pm me for all your HID retrofit needs *TIRED OF YOUR EGO HARD DATA IS MORE IMPORTANT AND USEFUL TO OTHERS SEEKING KNOWLEDGE AND THOES WANTING TO ADVANCE THE PLATFORM* DONT GET STUCK ON PRECISION TURBOS AND BWS THEY ARE NOT THE END ALL........ OTHER GREAT OPTIONS EXIST DO SOME RESEARCH DON'T BE A SHEEP

12-09-2012, 01:24 PM	#24 (permalink)
loroku SRTforums Member Join Date: Aug 2010 Member Number: 80621 Location: janesville wi Posts: 295	Quote: Originally Posted by D-SRT Grade A internet tuner here. i was exaggerating a bit but i have not heard of any benefit of going that low not to mention if you street drive car at all, your losing vE and fuel mileage goes in the toilet. __________________ Sold My Soul for a Neon pm me for all your HID retrofit needs *TIRED OF YOUR EGO HARD DATA IS MORE IMPORTANT AND USEFUL TO OTHERS SEEKING KNOWLEDGE AND THOES WANTING TO ADVANCE THE PLATFORM* DONT GET STUCK ON PRECISION TURBOS AND BWS THEY ARE NOT THE END ALL........ OTHER GREAT OPTIONS EXIST DO SOME RESEARCH DON'T BE A SHEEP

12-09-2012, 01:45 PM	#25 (permalink)
D-SRT SRTforums Member Join Date: Aug 2010 Member Number: 80561 Location: monterey Posts: 660	Quote: Originally Posted by loroku i was exaggerating a bit but i have not heard of any benefit of going that low not to mention if you street drive car at all, your losing vE and fuel mileage goes in the toilet. i lost no mpg going from 8.5 down to low compression. stop with the internet theorem, before you get stockpiled with chief for people to ignore. __________________ Pumpking. 10.71@140. 1st SRT in TENS in CA. Thanks to: TUNED BY MINDMELT101@DRAG-ON Tuning. - http://drag-ontuning.com/blog/ GOKEY RACING for anything fabrication related instagram for updates and pics: m_santiago37

12-09-2012, 01:49 PM	#26 (permalink)
tunerlover3 Fresh Meat Moderator Join Date: Dec 2009 Member Number: 76568 Location: Chicago Posts: 16,617	People go with low compression that want to run a lot of boost and lots of timing. You could either build an engine for lots of boost/timing and low compression or build on engine with generally lower boost/timing and higher compression. All depends on what fuel your using, what your tuner wants, etc. __________________ Diablo CMR tuner ~Dan~ 2004 Black Neon SRT4: E85 stock turbo SOLD 310HP 436TQ 2004 Eblue Neon SRT4: E85 5558 XXXHP XXXTQ

12-09-2012, 01:52 PM	#27 (permalink)
D-SRT SRTforums Member Join Date: Aug 2010 Member Number: 80561 Location: monterey Posts: 660	Quote: Originally Posted by loroku then please explain why you chose to run such low compression? Because 4yrs ago, there was no such thing as a diablo sport. Dropping money for an AEM at a premium price at the time wasnt an option. i was strictly 91octane, big turbo, and a piggyback...that was the best option for me at the time. 4yrs, going on 5yrs now at over 500hp the entire time on the same engiine...how many folks on this board can say that...ill thank the low compression for that. with dsp's and ems being so cheap now and capable of having full control of timing, i wouldnt do low compression again, but i dont regret my decision at all. __________________ Pumpking. 10.71@140. 1st SRT in TENS in CA. Thanks to: TUNED BY MINDMELT101@DRAG-ON Tuning. - http://drag-ontuning.com/blog/ GOKEY RACING for anything fabrication related instagram for updates and pics: m_santiago37 Last edited by D-SRT; 12-09-2012 at 02:01 PM.

12-09-2012, 02:03 PM	#28 (permalink)
loroku SRTforums Member Join Date: Aug 2010 Member Number: 80621 Location: janesville wi Posts: 295	k just from my knowledge the only reason to go that low was for low octane to increase the tuning window. im surprised you didn't lose mileage did you do cams at the same time? __________________ Sold My Soul for a Neon pm me for all your HID retrofit needs *TIRED OF YOUR EGO HARD DATA IS MORE IMPORTANT AND USEFUL TO OTHERS SEEKING KNOWLEDGE AND THOES WANTING TO ADVANCE THE PLATFORM* DONT GET STUCK ON PRECISION TURBOS AND BWS THEY ARE NOT THE END ALL........ OTHER GREAT OPTIONS EXIST DO SOME RESEARCH DON'T BE A SHEEP

12-09-2012, 02:21 PM	#29 (permalink)
loroku SRTforums Member Join Date: Aug 2010 Member Number: 80621 Location: janesville wi Posts: 295	to the op reduce your ignition timing and you will be able to run more boost especially with the meth __________________ Sold My Soul for a Neon pm me for all your HID retrofit needs *TIRED OF YOUR EGO HARD DATA IS MORE IMPORTANT AND USEFUL TO OTHERS SEEKING KNOWLEDGE AND THOES WANTING TO ADVANCE THE PLATFORM* DONT GET STUCK ON PRECISION TURBOS AND BWS THEY ARE NOT THE END ALL........ OTHER GREAT OPTIONS EXIST DO SOME RESEARCH DON'T BE A SHEEP

12-09-2012, 04:49 PM	#30 (permalink)
SRT-Diesel Premium Member (Lifetime) Join Date: Sep 2009 Member Number: 75019 Location: Princeton, TX Posts: 1,138	I'll never have to worry about knock, especially on e85. The only "knock" I get is because my cams are so noisy. I plan on turning off the knock sensor completely. I may not make as much power at 30 lbs as these guys that run a 8.5 or higher, but I won't ever have a limit on the amount of boost and timing I can run and still make power.

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