Forced Induction Custom FI Setup Questions

8:1 pistons?

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Old 08-31-2006, 10:23 PM
  #21  
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Default Re: 8:1 pistons?

Originally Posted by highroller54
no this is your thread

Q-should I run 8:1?
A-no
Well ---- you guys I'm going to do it anyways

so why ask?
I would say that 90% of the people saying no here, havn't even driven a car with lower than 9:1 compression.

Lower static compression = more boost = party time.
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Old 08-31-2006, 11:50 PM
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Default Re: 8:1 pistons?

who said i was asking if i should or not? im going to. i was asking if anyone else has and what there set up was. so if your not running low compression stfu. post else where
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Old 09-01-2006, 12:04 AM
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Default Re: 8:1 pistons?

Originally Posted by Minor Threat
Coming from the guy with the spins 1st, 2nd and 3rd sig...no power down low at all...
165 series 14" steelies and a pegleg tranny own me. and it doesn't spin til about 5000rpm. which on an LS, is the top end.
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Old 09-01-2006, 12:49 AM
  #24  
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Default Re: 8:1 pistons?

Originally Posted by Minor Threat
I would say that 90% of the people saying no here, havn't even driven a car with lower than 9:1 compression.

Lower static compression = more boost = party time.
you can make 500hp like ---- all from a b18c1 on 9.5:1 with a decent turbo and tune why would you want it lower? If you want big boost then you will need a big turbo which means big turbo lag, so anything under 5500rpm then its just a dog? ---- that and yes I have driven 8.2:1. Some engines will work good at 8:1 but ones with very low torque is a waist of time.
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Old 09-01-2006, 03:29 AM
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Default Re: 8:1 pistons?

My old dsm was 7.8:1. Is that low enough for you? It was too ------- (S)low for me so I ran it into a guard rail at 65 Why would you want to lower your compression to just boost more? Why not have some beefy c/r and boost a lot still with a good tune and have power across the board? (bashing territory 'cause the cars not mine but...) My buddy's scirroco was running 44psi on 12.5:1 c/r. It only was the first fwd vw to break into the 9's.... Low compression for boost is a myth just like the myth about my **** being small
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Old 09-01-2006, 11:45 AM
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Default Re: 8:1 pistons?

i say 8:1 in a gs-r motor with a 60-1 and 25 psi would be a pretty good time....
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Old 09-01-2006, 07:28 PM
  #27  
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Default Re: 8:1 pistons?

ya lemme get some 12:1r compression pistons and run 30pounds. itll be fun to drive everyday :1
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Old 09-01-2006, 09:15 PM
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Default Re: 8:1 pistons?

The pistons in my hyundai accent are originally from a hyundai scoupe turbo (almost unheard of car that came turbo for 2 years). Anyways the pistons stock are 7.5:1 for compression, now thats low. When I installed them in my motor it was milled to achieve about a 8:1 compression ratio. Off boost isnt that bad, but then again i have a small turbo which is fully spooled at 2500rpm. It would blow *** if i didnt spool till like 5k though. However running 12psi on this motor feels the same (if not better) as 10psi did on stock internals with a 10:1 compression. Im running 15psi (maxing the tiny turbo) and looking ot run at least 20 soon..... From all the crap talking about low compression i expected a dog in traffic but its not as bad as people make it sound.
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Old 09-03-2006, 09:59 AM
  #29  
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Default Re: 8:1 pistons?

well i have 8.5 pistons not sure what my totall compression ratio is but im running 14 pounds and im loving it. it doesnt matter what your compression is. your cars going to be slow before it hits the boost. if you know how to drive it you will enjoy it anyways. its a safer setup anyways so why not go with alittle lower you can always up the boost if you dont like it. especially for free.
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Old 09-03-2006, 01:17 PM
  #30  
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Default Re: 8:1 pistons?

Originally Posted by ****
165 series 14" steelies and a pegleg tranny own me. and it doesn't spin til about 5000rpm. which on an LS, is the top end.
5000rpm, it's like traction control!

I'm having the same problem albeit with a SOHC/DX tranny.

Originally Posted by highroller54
you can make 500hp like ---- all from a b18c1 on 9.5:1 with a decent turbo and tune why would you want it lower? If you want big boost then you will need a big turbo which means big turbo lag, so anything under 5500rpm then its just a dog? ---- that and yes I have driven 8.2:1. Some engines will work good at 8:1 but ones with very low torque is a waist of time.
You make it sound like hitting 500whp on pumpgas on a GSR and having it last is easy.

I'm just saying, I think this guy should run the pistons, I would.
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