| Markgase2000 |
| I got 9.5:1 in my Grand am is that decent compression for a NA car? Let me know what your compression is too. |
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| Supra_devil |
| mines 8.8, next year is 9.0 and 85-86 is 9.2, europe version was 9.5 iirc. |
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| sparkycivic |
| my civic was also 9.5. i think that is about the limit before you have to start thinking about gas octane and shit like that really bad. or maybe that's more like 9.8, or something ike that. turbos will be less than 8.6, for the same reason, just for comparison. |
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| SilverNeonRacer |
Not sure about my fifth... prolly pretty low.. I know my truck is 21:1
I think the neon is 9.5:1 or there abouts. |
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| Mustard |
stock for us is 10:1.
Cultus "upgrade" is 11.5:1
and the turbo low comps i want are 8.5:1
i don't know what you hope to acheive from finding out others compression ratios... there are so many variables to consider. |
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| Markgase2000 |
quote:
Originally posted by Mustard
stock for us is 10:1.
Cultus "upgrade" is 11.5:1
and the turbo low comps i want are 8.5:1
i don't know what you hope to acheive from finding out others compression ratios... there are so many variables to consider.
I dont wish to achieve anything , just kinda interesting "iwasbored" 11:1 omg wtf do you drive man? high octane forsure in wetf that is lmao!
ummmm if you could give me an example i would be most gratefull :)"i don't know what you hope to acheive from finding out others compression ratios... there are so many variables to consider." mustard |
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| Markgase2000 |
quote:
Originally posted by mwdguy
17.2:1
:eek: wow____________ |
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| Markgase2000 |
quote:
Originally posted by SilverNeonRacer
Not sure about my fifth... prolly pretty low.. I know my truck is 21:1
I think the neon is 9.5:1 or there abouts.
trucks is super high! is that cus its a work engine kinda thing? I know its semi natural compression for it but wow! |
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| mwdguy |
quote:
Originally posted by Markgase2000
:eek: wow____________
6 cylinders and about 20 lbs of boost
lol
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| mwdguy |
quote:
Originally posted by Markgase2000
trucks is super high! is that cus its a work engine kinda thing? I know its semi natural compression for it but wow!
because it's a diesel |
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| Pro Drag |
7.8:1 90-94 Turbo DSM's
8.5:1 95-99 Turbo DSM's |
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| notaturbotalon |
13.5:1
Regular gas |
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| mwdguy |
quote:
Originally posted by notaturbotalon
13.5:1
Regular gas
holy fuck |
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| SilverNeonRacer |
quote:
Originally posted by mwdguy
because it's a diesel
Bingo... I just dunno if that # includes the boost or not. |
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| mwdguy |
quote:
Originally posted by SilverNeonRacer
Bingo... I just dunno if that # includes the boost or not.
boost doesnt affect your actual compression ratio... all it is is a mathematical formula |
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| Markgase2000 |
quote:
Originally posted by mwdguy
boost doesnt affect your actual compression ratio... all it is is a mathematical formula
Ok i was trying to achieve something here , explain damnit and dont leave me in the dark ffs! Thanks :) Im not great with math....... |
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| mwdguy |
quote:
Originally posted by Markgase2000
Ok i was trying to achieve something here , explain damnit and dont leave me in the dark ffs! Thanks :) Im not great with math.......
lol
www.google.ca |
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| JustinL |
8.0:1 Turbo 944
9.7:1 NA 944 |
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| Markgase2000 |
quote:
Originally posted by mwdguy
lol
www.google.ca
Wheres the "Fuck you!" emoticon when you need it lol! |
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| oldraven |
8.0:1 In the TC.
Sport Truck mag converted a 350 to 383, and they got 9.5:1.
And an HO Jeep 4.0L has 8.8:1. |
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| oldraven |
quote:
Originally posted by Markgase2000
Wheres the "Fuck you!" emoticon when you need it lol!
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| REDX2NV |
quote:
Originally posted by mwdguy
boost doesnt affect your actual compression ratio... all it is is a mathematical formula
Boost affects your volumetric efficiency, if you didnt have the turbo your truck wouldnt run so well and have a hard time scavenging.
Diesel uses high compression due to the fact it relies on high compression to have the fuel mixture reach its flash point and combust, whereas spark ignition engine uses a spark to ignite it. |
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| mwdguy |
quote:
Originally posted by REDX2NV
Boost affects your volumetric efficiency, if you didnt have the turbo your truck wouldnt run so well and have a hard time scavenging.
Diesel uses high compression due to the fact it relies on high compression to have the fuel mixture reach its flash point and combust, whereas spark ignition engine uses a spark to ignite it.
true but it still doesnt affect your static compression ratio .. that is costant, determined by your stroke and piston. |
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| Mustard |
quote:
Originally posted by Markgase2000
I dont wish to achieve anything , just kinda interesting "iwasbored" 11:1 omg wtf do you drive man? high octane forsure in wetf that is lmao!
ummmm if you could give me an example i would be most gratefull
quote:
Originally posted under my name
Registered: Sep 2002
My Ride: Suzuki Swift 1.3T
Location: St.Albert, AB
Posts: 766
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| REDX2NV |
quote:
Originally posted by mwdguy
true but it still doesnt affect your static compression ratio .. that is costant, determined by your stroke and piston.
No of course not, just saying what the boost plays a factor. The diesel is over 100% efficient, whereas na is 33% |
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| SilverNeonRacer |
| Ya the truck ran fine before hitting boost, but 20psi sure helps. Course thats prolly what killed it, no boost management at all, not even a wastegate, the newer ones, well even the next year of production even had wastegates. |
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| GTS Jeff |
quote:
Originally posted by REDX2NV
diesel is over 100% efficient
Huh??? |
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| BlueTurboEGG |
| Stock my car was 9.5:1, with the headwork and metal head gasket, I would guess 8.5 to 8.7:1 19PSI on Esso gas :) |
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| Supra_devil |
quote:
Originally posted by Supra_devil
mines 8.8, next year is 9.0 and 85-86 is 9.2, europe version was 9.5 iirc.
i forgot to give more specs
8.8 was rated at 145hp
9.0 was rated at 150hp
9.2 was rated at 160hp (they also changed intake runners though)
9.5(europe) was rated at 170
Good power for 25-20 years ago, lol. |
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| dc2696 |
9.0:1
17.5:1 @20psi (hehehe):thumbup: |
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