# Thoughts on high compression turbo builds **URL:** \ **Category:** Shift518 Automotive\ **Created:** [February 24, 2009, 10:05pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396 "2009-02-24T22:05:45Z")\ **Posts on this page:** 20\ **Page:** 4
**Author:** ![JiM\_P\_2001](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jim_p_2001/32/6364_2.png) [@JiM\_P\_2001](https://forums.speedlife.net/u/JiM_P_2001)\ **Post date:** [February 25, 2009, 2:11pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/61 "2009-02-25T14:11:17Z")
> [@RBakerian"](#): > > Also, I’ve been told that the blend on E85 can change, and BOOM there goes your engine. E85 ranges from 100-105 octane ---
**Author:** ![deadbeatrec](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/deadbeatrec/32/6401_2.png) [@deadbeatrec](https://forums.speedlife.net/u/deadbeatrec)\ **Post date:** [February 25, 2009, 7:33pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/62 "2009-02-25T19:33:18Z")
my vette is 10.5:1 with 8psi = good times 🙂 ---
**Author:** ![plaf713](https://avatars.discourse-cdn.com/v4/letter/p/439d5e/32.png) [@plaf713](https://forums.speedlife.net/u/plaf713)\ **Post date:** [February 26, 2009, 12:40pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/63 "2009-02-26T12:40:53Z")
> [@If I were to trade in the 6....](https://forums.speedlife.net/t/if-i-were-to-trade-in-the-6/14788/11): > > my vette is 10.5:1 with 8psi = good times 🙂 8psi over 346cube inches is different than his little v6, i would say that there is more quality parts in an ls6 than in his nissan ---
**Author:** ![Mk4\_30R\_Ban](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mk4_30r_ban/32/6347_2.png) [@Mk4\_30R\_Ban](https://forums.speedlife.net/u/Mk4_30R_Ban)\ **Post date:** [February 26, 2009, 12:41pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/64 "2009-02-26T12:41:46Z")
> [@Yo business peeps...](https://forums.speedlife.net/t/yo-business-peeps/14812/17): > > 8psi over 346cube inches is different than his little v6, **i would say that there is more quality parts in an ls6 than in his nissan** you’d be suprised. ---
**Author:** ![plaf713](https://avatars.discourse-cdn.com/v4/letter/p/439d5e/32.png) [@plaf713](https://forums.speedlife.net/u/plaf713)\ **Post date:** [February 26, 2009, 12:43pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/65 "2009-02-26T12:43:33Z")
maybe, but the fact is that an ls6 will handle 8 psi a lot better than his 3.slow or whatever is in there, especially with a high compression engine ---
**Author:** ![psi2high](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/psi2high/32/6320_2.png) [@psi2high](https://forums.speedlife.net/u/psi2high)\ **Post date:** [February 26, 2009, 1:25pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/66 "2009-02-26T13:25:21Z")
Not about pressure.Its about cfm ---
**Author:** ![Mk4\_30R\_Ban](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mk4_30r_ban/32/6347_2.png) [@Mk4\_30R\_Ban](https://forums.speedlife.net/u/Mk4_30R_Ban)\ **Post date:** [February 26, 2009, 1:26pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/67 "2009-02-26T13:26:58Z")
8 psi, is 8 psi. no matter how you cut it, its still the same pressure. the V8 makes more power from the same boost because it fills more area…, as long as its 8psi from something t25/t28 hell be safe, 8psi from a gt35 is asking for trouble. i know 10:1 builds running 25psi. its all in the tuning and the chosen fuel… im not saying his bottom end will take the boost from a larger set of twins or at all. but 8psi is very doable on a 10:1 motor. ---
**Author:** ![Mk4\_30R\_Ban](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mk4_30r_ban/32/6347_2.png) [@Mk4\_30R\_Ban](https://forums.speedlife.net/u/Mk4_30R_Ban)\ **Post date:** [February 26, 2009, 1:29pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/68 "2009-02-26T13:29:43Z")
now about pressure vs volume. weve discussed this in another thread. 20psi from say a T25 vs 20psi from a GT35R. the GT35R will have atleast twice the volume at 20psi compared to a T25 at 20psi. ---
**Author:** ![psi2high](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/psi2high/32/6320_2.png) [@psi2high](https://forums.speedlife.net/u/psi2high)\ **Post date:** [February 26, 2009, 1:31pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/69 "2009-02-26T13:31:06Z")
Its about how much air is actually being pushed. Pressure has no relevance in the statement of an ls6 vs a 3.0 v6 ---
**Author:** ![Mk4\_30R\_Ban](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mk4_30r_ban/32/6347_2.png) [@Mk4\_30R\_Ban](https://forums.speedlife.net/u/Mk4_30R_Ban)\ **Post date:** [February 26, 2009, 1:34pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/70 "2009-02-26T13:34:00Z")
> [@The Tesla Roadster: Electric and FAST](https://forums.speedlife.net/t/the-tesla-roadster-electric-and-fast/21541/12): > > Its about how much air is actually being pushed. Pressure has no relevance in the statement of an ls6 vs a 3.0 v6 unaware of the direction of this, but i know the arguement is not well thought out. the only way to properly compare the effects would be to have the same CFM put into the engine, not common boost pressure. what one flows at 8psi, the other might at 12psi and vice versa. ---
**Author:** ![psi2high](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/psi2high/32/6320_2.png) [@psi2high](https://forums.speedlife.net/u/psi2high)\ **Post date:** [February 26, 2009, 1:37pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/71 "2009-02-26T13:37:01Z")
Exactly ---
**Author:** ![TurboTravis](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbotravis/32/6406_2.png) [@TurboTravis](https://forums.speedlife.net/u/TurboTravis)\ **Post date:** [February 27, 2009, 3:11am UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/72 "2009-02-27T03:11:31Z")
> [@FS: STi 05 BBS Wheels and Tires](https://forums.speedlife.net/t/fs-sti-05-bbs-wheels-and-tires/13182/26): > > I have never used the stuff and don’t like talking about stuff that I have heard from other people. I have researched it for my own vehicle and decided not to use it because there were too many questions that I had that were up in the air. I want to know exactly what will happen if I make a change to my car, and won’t make the change unless it’s been confirmed my multiple people and I have seen it in person. Most ‘newer’ cars fuel lines will be fine with E85. It’s the aftermarket braided shit that’s no good to use with E85. In fact, braided begins to ‘weep’ after years of use with regular fuel. The most readily available fuel line that is compatible with E85 is Aeroquip socketless, available from Jegs. Did the research years ago. ---
**Author:** ![TurboTravis](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbotravis/32/6406_2.png) [@TurboTravis](https://forums.speedlife.net/u/TurboTravis)\ **Post date:** [March 1, 2009, 7:44am UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/73 "2009-03-01T07:44:24Z")
> [@RBakerian"](#): > > Also, I’ve been told that the blend on E85 can change, and BOOM there goes your engine. It changes blends by about 5 percent either way…the fuel is VERY forgiving and as long as your tune is not ON THE RAGGED EDGE on the 70 percent blend you will be totally fine. ---
**Author:** ![Shady](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@Shady](https://forums.speedlife.net/u/Shady)\ **Post date:** [March 2, 2009, 5:30am UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/74 "2009-03-02T05:30:58Z")
Ned, for starters, on stock boost with an NA-T setup, youll be making a bit more power than stock TT guys… You may have to retard the timing, and upgrade your fuel pump (not sure if they differ from NA - TT) also you will have to upgrade your injectors to TT injectors as well… along with a TT ECU… For a stock NA-T(T) setup, you wont need an AEM. Run stock boost for awhile and see how the car runs, if your getting Detonation retard the timing and go from there Unless you want to make big power, theres no need to go stadnalone or any other type of fuel. It seems like your reading to much into stuff you dont need rather than what youll need to do a basic swap/setup ---
**Author:** ![votblindub](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/votblindub/32/6280_2.png) [@votblindub](https://forums.speedlife.net/u/votblindub)\ **Post date:** [March 2, 2009, 5:35am UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/75 "2009-03-02T05:35:20Z")
how stable and reliable are those motors(provided the driver isant a complete newfag or is redlining it 24/7) after you add a turbo? ---
**Author:** ![Shady](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@Shady](https://forums.speedlife.net/u/Shady)\ **Post date:** [March 2, 2009, 5:41am UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/76 "2009-03-02T05:41:56Z")
> [@WTB: stock muffler](https://forums.speedlife.net/t/wtb-stock-muffler/14933/2): > > how stable and reliable are those motors(provided the driver isant a complete newfag or is redlining it 24/7) after you add a turbo? completely reliable… the only way its going to blow up is from constant abuse like any other motor, or a retard who adds boost and doesnt listen for detonation… ---
**Author:** ![votblindub](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/votblindub/32/6280_2.png) [@votblindub](https://forums.speedlife.net/u/votblindub)\ **Post date:** [March 2, 2009, 5:48am UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/77 "2009-03-02T05:48:36Z")
how do the internals take the added heat? ---
**Author:** ![deadbeatrec](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/deadbeatrec/32/6401_2.png) [@deadbeatrec](https://forums.speedlife.net/u/deadbeatrec)\ **Post date:** [March 2, 2009, 5:48am UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/78 "2009-03-02T05:48:37Z")
> [@trampoline/jumps/ philippines VIDEO i made \*\*\*\*\*\*](https://forums.speedlife.net/t/trampoline-jumps-philippines-video-i-made/14769/23): > > you’d be suprised. actually the LS6 is not the same motor as the LS1. almost everything down to the block are different. different materials for i would say 40-50% of the motor. ---
**Author:** ![Shady](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@Shady](https://forums.speedlife.net/u/Shady)\ **Post date:** [March 2, 2009, 5:57am UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/79 "2009-03-02T05:57:04Z")
> [@FS: 1995 Isuzu Rodeo 4WD](https://forums.speedlife.net/t/fs-1995-isuzu-rodeo-4wd/14865/5): > > how do the internals take the added heat? As long is everything is kept up on… theyll be fine… I would recomend running an intercooler and possibly a bigger radiator but on stock boost its not needed. Most of the internals on the VG engines are pretty strong from factory, while not being forged off the bat they can take quite a beating ---
**Author:** ![NedZ32](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/nedz32/32/6393_2.png) [@NedZ32](https://forums.speedlife.net/u/NedZ32)\ **Post date:** [March 2, 2009, 12:36pm UTC](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396/80 "2009-03-02T12:36:13Z")
Mackenzie you bring up some good points. I’m talking with a guy on 3zc whos in the middle of a NA-TT build. Its dawning on me that its kind of silly to go through the trouble of replacing the NA wristpins with TT spec and not just replace the pistons with forged lower compression like 9:5 or whatever. I think as cool as it would be to do a high c/r TT build I’m going to hold out and build up a TT engine to swap in. Vot, you would need to add a TT oil cooler as well to help cope with the heat. [Previous page](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396.md?page=3) [Next page](https://forums.speedlife.net/t/thoughts-on-high-compression-turbo-builds/242396.md?page=5)