# Turbo talk. **URL:** \ **Category:** Shift518 Automotive\ **Created:** [August 22, 2011, 2:25pm UTC](https://forums.speedlife.net/t/turbo-talk/260105 "2011-08-22T14:25:35Z")\ **Posts on this page:** 20\ **Page:** 4
**Author:** ![10secondC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/10secondc/32/6715_2.png) [@10secondC](https://forums.speedlife.net/u/10secondC)\ **Post date:** [August 23, 2011, 9:16am UTC](https://forums.speedlife.net/t/turbo-talk/260105/61 "2011-08-23T09:16:12Z")
> [@FS: 2001 Jetta 1.8t](https://forums.speedlife.net/t/fs-2001-jetta-1-8t/44820/8): > > whats worthwhile? 1000HP? if so nope not worth it, should have built it from the ground up with that figure in mind FI. 700Hp, large single, 7-10psi should put him close to that right? > > and yeah I agree, compression is just a number, each motor and their designs are completely different so its irrelevant until those design specs come into play. > > food for thought: > > LM7 5.3L with stock heads and stock HG is 9.5:1 > LM7 5.3L with 243 heads and stock HG is 11.0:1 > LQ4 6.0L (stock dished pistons) with stock heads and stock HG is 9.5:1 > LQ9 6.0L (stock flat top pistons) with stock heads and stock HG is 10:1 > LQ9 6.0L (stock flat top pistons) with 243 heads 11.5:1 > > 8-10 psi (76MM) on the lm7 will get you 500hp with a junkyard block. > 8-10 psi (76MM) on the lq4 will get you a bit more with a junkyard block. > 8-10 psi (76MM) on the lq9 will get you a bit more but you better have good head studs. > 8-10 psi (76MM) on the lm7 & 243’s will get you 600hp+ with a junkyard block but dont go nuts with the boost. > > yeah you see the trend. and are right. I wouldn’t be pushing it past 11.5:1 compression FI. unless you run like 5psi or something. and most large frame turbos like to spool up to be in their efficiency range. Well to put these #'s in comparison his N/A motor at 12.5:1 should make around 500hp. Unfortunately on that compression with our current state of tuning I wouldn’t put more than 5-7psi on 12.5:1(thats what I meant by not worth it,IMO less than 10psi on a Gen III is a waste of money). Now if you drop compression to 9:1 these things will take 20 psi pretty comfy and make in the neighborhood of 1200-1300 crank hp on a 426 and 1100 on a 370. ---
**Author:** ![KrazyKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/krazykid/32/6371_2.png) [@KrazyKid](https://forums.speedlife.net/u/KrazyKid)\ **Post date:** [August 23, 2011, 9:29am UTC](https://forums.speedlife.net/t/turbo-talk/260105/62 "2011-08-23T09:29:15Z")
/\ soooo time to sell the pistons! ---
**Author:** ![GermanPSI](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/germanpsi/32/6353_2.png) [@GermanPSI](https://forums.speedlife.net/u/GermanPSI)\ **Post date:** [August 23, 2011, 10:05am UTC](https://forums.speedlife.net/t/turbo-talk/260105/63 "2011-08-23T10:05:25Z")
10:1 pistons and lots of boost please ---
**Author:** ![Eatonualive](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/eatonualive/32/6442_2.png) [@Eatonualive](https://forums.speedlife.net/u/Eatonualive)\ **Post date:** [August 23, 2011, 12:27pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/64 "2011-08-23T12:27:50Z")
i went with more compression toooooo ---
**Author:** ![SSmokinn\_SS](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)\ **Post date:** [August 23, 2011, 12:42pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/65 "2011-08-23T12:42:57Z")
running 10.5.1 here on 17lbs of boost. ---
**Author:** ![jdaniels](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdaniels/32/6399_2.png) [@jdaniels](https://forums.speedlife.net/u/jdaniels)\ **Post date:** [August 23, 2011, 12:46pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/66 "2011-08-23T12:46:26Z")
> [@The Ricer in 2008](https://forums.speedlife.net/t/the-ricer-in-2008/44000/122): > > running 10.5.1 here on 17lbs of boost. 10.2:1 last I checked… ---
**Author:** ![SSmokinn\_SS](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)\ **Post date:** [August 23, 2011, 12:47pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/67 "2011-08-23T12:47:20Z")
> [@wtf???](https://forums.speedlife.net/t/wtf/44839/9): > > 10.2:1 last I checked… cam bumps compression a little bit broski. ---
**Author:** ![DeathbyRT](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/deathbyrt/32/6648_2.png) [@DeathbyRT](https://forums.speedlife.net/u/DeathbyRT)\ **Post date:** [August 23, 2011, 12:50pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/68 "2011-08-23T12:50:33Z")
When the time comes ill lower CR to 10:5:1 area or less, go with high boost pistons, billet mains, arp hardware and a better crank. Sell the rotating assembly i have an swap in a new one. I just wanted to see and read open discussion from people who know their stuff. Im really glad 10secondc is on here now because he can explain more in depth about these motors. ---
**Author:** ![jdaniels](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdaniels/32/6399_2.png) [@jdaniels](https://forums.speedlife.net/u/jdaniels)\ **Post date:** [August 23, 2011, 1:20pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/69 "2011-08-23T13:20:03Z")
> [@Doctors Office on Union](https://forums.speedlife.net/t/doctors-office-on-union/44844/7): > > cam bumps compression a little bit broski. No, it doesn’t. Dynamic compression (not static) changes with big cams and it actually goes DOWN, not UP. ---
**Author:** ![Eatonualive](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/eatonualive/32/6442_2.png) [@Eatonualive](https://forums.speedlife.net/u/Eatonualive)\ **Post date:** [August 23, 2011, 1:46pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/70 "2011-08-23T13:46:00Z")
yeah^ the humidity also affects your comp. as well as your boost. on a humid day my car only yields 7.5:1 and 2 psi. shit sucks ---
**Author:** ![jdaniels](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdaniels/32/6399_2.png) [@jdaniels](https://forums.speedlife.net/u/jdaniels)\ **Post date:** [August 23, 2011, 1:47pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/71 "2011-08-23T13:47:40Z")
Humidity is the reason Lance’s hair looks the way it does. ---
**Author:** ![10secondC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/10secondc/32/6715_2.png) [@10secondC](https://forums.speedlife.net/u/10secondC)\ **Post date:** [August 23, 2011, 7:51pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/72 "2011-08-23T19:51:03Z")
> [@Wheres Newman?](https://forums.speedlife.net/t/wheres-newman/44814/31): > > When the time comes ill lower CR to 10:5:1 area or less, go with high boost pistons, billet mains, arp hardware and a better crank. Sell the rotating assembly i have an swap in a new one. I just wanted to see and read open discussion from people who know their stuff. Im really glad 10secondc is on here now because he can explain more in depth about these motors. your pistons are fine…swap out to a 5.7 head and you will drop compression to 10:1 possibly 9.5:1. ---
**Author:** ![DeathbyRT](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/deathbyrt/32/6648_2.png) [@DeathbyRT](https://forums.speedlife.net/u/DeathbyRT)\ **Post date:** [August 23, 2011, 8:11pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/73 "2011-08-23T20:11:22Z")
F that! Im never selling those eagles. ---
**Author:** ![DeathbyRT](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/deathbyrt/32/6648_2.png) [@DeathbyRT](https://forums.speedlife.net/u/DeathbyRT)\ **Post date:** [August 23, 2011, 8:13pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/74 "2011-08-23T20:13:31Z")
Besides, those internals wont handle a turbo making 950+ whp id think. ---
**Author:** ![10secondC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/10secondc/32/6715_2.png) [@10secondC](https://forums.speedlife.net/u/10secondC)\ **Post date:** [August 23, 2011, 8:16pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/75 "2011-08-23T20:16:29Z")
neither will the transmission,driveshaft or rear differential ---
**Author:** ![DeathbyRT](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/deathbyrt/32/6648_2.png) [@DeathbyRT](https://forums.speedlife.net/u/DeathbyRT)\ **Post date:** [August 23, 2011, 8:24pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/76 "2011-08-23T20:24:22Z")
We’ll worry about that bridge when i cross 600 whp :rofl. ---
**Author:** ![tdi\_logik](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/tdi_logik/32/6310_2.png) [@tdi\_logik](https://forums.speedlife.net/u/tdi_logik)\ **Post date:** [August 23, 2011, 9:48pm UTC](https://forums.speedlife.net/t/turbo-talk/260105/77 "2011-08-23T21:48:51Z")
I’ll show ya turbo talk ---
**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\ **Post date:** [August 24, 2011, 4:38am UTC](https://forums.speedlife.net/t/turbo-talk/260105/78 "2011-08-24T04:38:52Z")
Pipe dream Jr ITT ---
**Author:** ![DeathbyRT](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/deathbyrt/32/6648_2.png) [@DeathbyRT](https://forums.speedlife.net/u/DeathbyRT)\ **Post date:** [August 24, 2011, 6:02am UTC](https://forums.speedlife.net/t/turbo-talk/260105/79 "2011-08-24T06:02:56Z")
> [@94Gt5.0"](#): > > Pipe dream Jr ITT Gotta start somewhere. ---
**Author:** ![tdi\_logik](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/tdi_logik/32/6310_2.png) [@tdi\_logik](https://forums.speedlife.net/u/tdi_logik)\ **Post date:** [August 24, 2011, 7:38am UTC](https://forums.speedlife.net/t/turbo-talk/260105/80 "2011-08-24T07:38:34Z")
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