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hello all again,
my question(s) are: if i decide to put turbo in my stock 04 civic sedan ex, would it have any negative effects on the vtec, is there a difference btwn in both timing and engine wear if the car was a automatic or a manual, and will having the turbo decrease the mpg on it?

+ i heard there is a switch that can be placed with turbo that would give u low boost and high boost when u'd need it thus minimizing engine wear and tear!!!<--is that true???

 
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with a boost controller you can set your numbers for whatever you want. and yes you will lose mpg

 
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boost will not affect vtec at all...........although, engines with vtec do have higher compression which is bad for F/I set-ups. Boost will slightly decrease mpg depending on how u drive.........i am getting 33mpg.

Turbo XS has a dual stage MBC that allows you to swtich from high to low boost.

 
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High Compression with boost is not bad, it just mean you can not run more boost without alot more tuning. A higher CR motor with the 8psi will make alot more power than a low CR motor with 8psi.

 
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if you don't adjust your octane accordingly you will melt a piston or break a rod because of the severe detonation that you will get. Higher compression isnt the best for a street turbo engine because it limits the boost that you can run on pump gas. 3psi of boost is like 1 CR point. (8.5 CR engine with 6psi is like a normal 10.5:1 engine. adjust octane accordingly.)

 
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Hey just curious. I have an 04 manual ex coupe and was wondering what I needed to keep it stock internals for a turbo set-up.. Any suggestions

 
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Yah but you talk as if 7thgener's are pushing 500hp monsters. They're not. I can think of plenty of motors that hold well upwards of 300+ hp range on stock internals/compression. I'm not in any way implying that the d17 will make that kind of power on stock internals, however.

What it all boils down to is what some1 mentioned previously, you can't boost as much on high compression. BUT....boost for boost a higher compression motor will make more power than the lower compression motor. HOWEVER.....if the low comp. car wants to turn it up, he/she will have more leeway to do so. As far as detonation is concerned, yes it can happen. You can prevent it by not boosting 20psi on a stock d17. SIMPLE.

Just keep in mind these are daily driven SOHC 4 bangers dood. You just can't go all crazy with them. it'll never TRULY make what other motors have the potential to.

 
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thanks for the info....So is it better to have turbo on an automatic or a manual.....the reason being me wanting to know on what i would get better gas mileage!!!

*by the way..wuts a safe level of psi that i can use so that the engine wont detinate and also is there some sort of a switch which would allow me to turn off the turbo when i would not need it!!!???



************************************************** *******
u guys are FrEaKiN Geniouses!!!

 
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^^^ I'm no boost guru, but I think the switch you're referring to is the boost controller, which you can turn up or down your boost for less stress on engine, I've been searching alot online lately about turbo's coz i'm in the process on boosting (my turbo should arrive this friday) and I think that's what you're talkin about...

on the D17a2 EX I think the safe PSI is 7PSI probably 10MAX without needing any internals until your head gasket pops! I haven't heared anybody who runs any higher than 10PSI here without any internal upgrades and FMU unit...

so just be safe stay below 7PSI, it'll save you alot of headache and money... I know I will... 160whp should be enough for street daily driven car...

 
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why spend 2-3000 on something like that and be safe with 30 more ponies......then i see wut u mean about not destroying ur engine!!!

 
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try close to 60 more ponies(most civics dyno around 100-110whp)....turbos are worth it. And you can still put 100,000 miles on your engine, the main thing is its about tuning and the way you drive, if you drive your car constantly hard(even n/a) you still wear down the engine/tranny faster. But if you take care or your motor, turbo and transmission you'll be ok in the long run. And believe me, 160whp is VERY fun on a civic

 
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^^^amen brotha! soon I will be on the 7thgen200whpClub

 
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Aint that the truth...i love this site

 
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so wuts the lowest risk psi level i can put on my vic (if i get a turbo kit)and still keep it good for 100000 miles + get good whp

 
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lowest risk? depends on a lot of things like what else you have on your car, but 5psi is generally safe.

 
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so its not possible to turn of the turbo at the push of a button right...i have all stock internals....wut would u recommend(to make ne other adjustments if i get turbo)!! + wuts the decrease in the mpg~~~dun say slight cuz $ matters
+ so does turbo!!!

 
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if u are worried about money, then don't get a turbo, it will cost you more than you think.

i am getting 33mpg at 9psi

 
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If you want a turbo car, a small turbo engine that make 230whp has better gas mileage than less say an equally powered V8 Mustang that make the same WHP. So depending on how you see it. The turbo save on gas to make the same hp as a non-turbo car. Turbo is the replacement for displacement.

If it is a money issue do not go turbo. In the end you will spend alot on engine work, blown head gaskets, tuning and dyno time. For all those who say just stay at 5 psi I say forget that ****. It is not worth the money to just run 5psi. Hell I run 10-12psi daily on stock internals. Just remember after 200lbs of torque say goodby to your clutch.

 
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hmmmm 10-12 on stock internals.... I think i'm going to try that... but did you use FMU, will VAFC2 will be able to push 10-12PSI?

 
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yeah, that is what he has.......but it is just a matter of time b4 he fries his rings

 
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i think thats what i love about my dx.. the dx has a lower compression than the ex.. so right now i have an ex head on my dx motor so i am running vtec on a dx engine.. plus when i get my turbo its gonna be all good..

 
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well maybe 10-12PSI once a month ain't gonna hurt the engine right?

 
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I pull the engine apart soon. If I get my block from DH I will be able to let you know how extended abuse looks like. But So far so good. My head goes on tommorrow and another head gasket. I worry more about head gaskets than rings. The damn thing wont hold.

 
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did u get the nippon leakless gasket ?? Riceburner was running 13psi with that.

 
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Just don't run too many "match boost" races against EX civics. Even w/lower compression, although you can boost higher, doesn't mean you'll make MORE power than say you on 7psi vs. an EX on 7psi.

 
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i hear ya, im not gonna do nethin crazy on my car, but i still want to know if there is anyone that has ran 7 psi with stock internals for years and has had no problems!

 
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i suppose you could get an electronic boost controller and "turn of the turbo" with the push of a couple of buttons

 
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not really. you cant technically run a 0 psi setting. in fact, it probally wouldnt even be recommended to run less than 4 psi or so once you have the whole turbo setup.

 
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i like turbos.

 
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sure u can