# Compression vs boost tradeoff **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [September 7, 2007, 7:25pm UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023 "2007-09-07T19:25:23Z")\ **Posts on this page:** 14\ **Page:** 2
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [September 26, 2007, 10:29am UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/21 "2007-09-26T10:29:43Z")
[quote=“eesti,post:20,topic:35023"”] Would you kindly elaborate? [/quote] i dont think he has a fucking clue what hes talking about :gotme: what does a blown coupler have to do with an engine’s scr? ---
**Author:** ![Toda\_Party](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/toda_party/32/7354_2.png) [@Toda\_Party](https://forums.speedlife.net/u/Toda_Party)\ **Post date:** [September 26, 2007, 10:44am UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/22 "2007-09-26T10:44:23Z")
turbo, don’t be a pussy, step it up to like 9.5:1 fuck 8.xx, thats like rear-mount stylez right there, you’re better than that ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [September 26, 2007, 11:04am UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/23 "2007-09-26T11:04:23Z")
lol. depends on the cubage i go with. 8.8 is a possibility for 4xxci. someone needs to buy my turbo setup though ---
**Author:** ![Inn-Tune](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/inn-tune/32/7588_2.png) [@Inn-Tune](https://forums.speedlife.net/u/Inn-Tune)\ **Post date:** [September 26, 2007, 11:51am UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/24 "2007-09-26T11:51:39Z")
This should have ended with Toda’s post. ---
**Author:** ![rskrause](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/rskrause/32/7367_2.png) [@rskrause](https://forums.speedlife.net/u/rskrause)\ **Post date:** [September 26, 2007, 11:58am UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/25 "2007-09-26T11:58:01Z")
Have you ever driven one of these “sluggish” high boost low CR cars? Mine is so sluggish that you need a spare pair of shorts. Maybe turbos are that way - I have less experience with them. ---
**Author:** ![Toda\_Party](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/toda_party/32/7354_2.png) [@Toda\_Party](https://forums.speedlife.net/u/Toda_Party)\ **Post date:** [September 26, 2007, 12:04pm UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/26 "2007-09-26T12:04:38Z")
yeah i think they were talking about turbo cars, and 4 bangers specifically… I once drove a 7.8:1 DSM w/ a t3/t4 on it, waiting for that shit to spool…i could’ve gotten out and walked faster during the wait ---
**Author:** ![rskrause](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/rskrause/32/7367_2.png) [@rskrause](https://forums.speedlife.net/u/rskrause)\ **Post date:** [September 26, 2007, 12:58pm UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/27 "2007-09-26T12:58:02Z")
[quote=“Toda Party,post:26,topic:35023"”] yeah i think they were talking about turbo cars, and 4 bangers specifically… I once drove a 7.8:1 DSM w/ a t3/t4 on it, waiting for that shit to spool…i could’ve gotten out and walked faster during the wait [/quote] Won’t a little nitrous wake a bish like that right up? ---
**Author:** ![Toda\_Party](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/toda_party/32/7354_2.png) [@Toda\_Party](https://forums.speedlife.net/u/Toda_Party)\ **Post date:** [September 26, 2007, 1:03pm UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/28 "2007-09-26T13:03:35Z")
wasn’t my car, but yeah probably. i’d rather just make up for the “deadness” by bumping the compression. on the civic its ok cuz i like not building part-throt boost (keep myself outta trouble) and if i do need to get going, i can just downshift to 2nd/3rd and rev it out to 9k, then shift back into 5th and continue cruising again…couldnt do that i nthe dsm cuz it revved out to 7k and full boost hit by like 5 lol ---
**Author:** ![Harvey](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/harvey/32/5069_2.png) [@Harvey](https://forums.speedlife.net/u/Harvey)\ **Post date:** [September 26, 2007, 1:26pm UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/29 "2007-09-26T13:26:09Z")
[quote=“turbo ls1 ss,post:21,topic:35023"”] i dont think he has a fucking clue what hes talking about :gotme: [/quote] I know, I just wanted to give him a chance to defend himself… ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [September 26, 2007, 2:04pm UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/30 "2007-09-26T14:04:44Z")
[quote=“rskrause,post:25,topic:35023"”] Have you ever driven one of these “sluggish” high boost low CR cars? Mine is so sluggish that you need a spare pair of shorts. Maybe turbos are that way - I have less experience with them. [/quote] yes. for example these: i’ve driven my own boosted setups: 8.7:1 vs 8.2:1, both turbo i’ve driven chucks 9:1 D1SC vs 8.5:1 F1C. id say thats a pretty nice spectrum. although there were other contributing factors, i would say approaching the 7s:1 SCR def makes the car a little more sluggish down low :gotme: i’ve also driven stock engine procharged and turbo cars, and they are def more peppy with 10:1 ---
**Author:** ![Firehawk853](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/firehawk853/32/7607_2.png) [@Firehawk853](https://forums.speedlife.net/u/Firehawk853)\ **Post date:** [September 26, 2007, 2:14pm UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/31 "2007-09-26T14:14:12Z")
My higher compression engine with the smaller blower was “more peppy” down low. I still do not have dyno numbers to compare actual horsepower made for both setups. Hopefully soon. ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [September 26, 2007, 3:03pm UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/32 "2007-09-26T15:03:56Z")
muscle50’s fox has a lot of low end grunt…esp for a small cube centrifical. dont know what his compression is though. Id guess 9-9.5:1 ---
**Author:** ![LXIFLYBY](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lxiflyby/32/7399_2.png) [@LXIFLYBY](https://forums.speedlife.net/u/LXIFLYBY)\ **Post date:** [September 26, 2007, 7:16pm UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/33 "2007-09-26T19:16:18Z")
i dont see the point in going under 9:1 compression, at least for turbo 4 cyl ---
**Author:** ![zmainiac](https://avatars.discourse-cdn.com/v4/letter/z/d78d45/32.png) [@zmainiac](https://forums.speedlife.net/u/zmainiac)\ **Post date:** [September 26, 2007, 10:24pm UTC](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/34 "2007-09-26T22:24:12Z")
Well my motor is a 3.4 liter V6, not a 4 cyl, But I still think that 9.5 to 1 should be fine for street use. Thanks for all the input. I didn’t think that I made a bad choice but I was curious to the +'s and -'s to each situation. My next project will be a turbo V8 for sure and it will probably be a lsx engine. I got a spare z31 without an engine at the moment, could be a good winter project. [Previous page](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023.md?page=1)