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Old 08-07-2010, 07:04 PM   #1
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Default fit large turbo = surge?

iam aiming for 270whp and need a turbo big enough to make 270whp without being too big to create compressor surge low in the rev range. any one have a turbo in mind i will be using my car at the race track.
other thing is does an ebc allow you to fit a larger turbo so that you dont create too much boost at too low in the rev range which would cause surge?

Last edited by delcbr; 08-07-2010 at 07:30 PM.
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Old 08-07-2010, 07:11 PM   #2
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You want to not surge in the low end but you don't want to make boost in the low end?
Also, can you be any more vague? I'm aiming for 270hp what turbo do I need? HURR DURR
Also, have you heard of the search function?
Also, have you heard of the "build threads" section?
Also......Ah hell I'm not even going to waste my time..
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Old 08-07-2010, 07:14 PM   #3
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Quote:
Originally Posted by delcbr View Post
fing my r t bear biturbos t ato thp bite biace tha alourghindo a y issinoed ssoeres d 270whintureeve y thp be t m w allant wing indo t ak. osuram av tuto yo sssi surg thito amak. omi bowinthebore ming bev w t a igeeso the? tooooso ig the itomy whoowinthp too bo thaloom aveve wighe thack.
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Neither EBC nor MBC will allow you to reduce boost below the baseline pressure of the wastegate actuator. Beyond that, I can't imagine what you're trying to ask.
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Old 08-07-2010, 07:31 PM   #4
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yes i have read half of the build threads and dyno sheets but havent found one yet with the horsepower i want to make so iam not sure what turbo is best suited.
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Old 08-07-2010, 07:46 PM   #5
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You haven't seen any builds/dyno's here with 270 hp?
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Old 08-07-2010, 07:48 PM   #6
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check the threads by Savington. in one of his previous setups he was making ~270 iirc.

basically get a 2871R with the 0.86ar hotside to flow mass amounts and you will be good.

i have that setup on my 1.6L and im going to do a 3rd gear pull later today to get a log of where my turbo actually hits boost. (around 3800-4000)
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Old 08-07-2010, 10:24 PM   #7
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You're trying to make the dose, huh?

For 270 get a 2860. I hope you have an engine that will make this power for more than 5 minutes. A blow off valve will keep you from compressor surge. Please stop hanging out with your dose friends
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Old 08-07-2010, 11:47 PM   #8
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Old 08-08-2010, 01:35 AM   #9
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Quote:
Originally Posted by shlammed View Post
check the threads by Savington. in one of his previous setups he was making ~270 iirc.

basically get a 2871R with the 0.86ar hotside to flow mass amounts and you will be good.

i have that setup on my 1.6L and im going to do a 3rd gear pull later today to get a log of where my turbo actually hits boost. (around 3800-4000)
arguably the .86 is overkill for sub 300 whp. i have the 2876 .64 and it's amazing at 250 rwhp (relatively low boost on my stock motor)
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Old 08-08-2010, 02:55 PM   #10
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ok thanks for the replys. so what difference does a larger .86 mean over the .64 ar does a larger ar make it longer and harder to spool iam unsure?
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Old 08-08-2010, 03:28 PM   #11
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Quote:
Originally Posted by delcbr View Post
ok thanks for the replys. so what difference does a larger .86 mean over the .64 ar does a larger ar make it longer and harder to spool iam unsure?
Please stop being retarded you ******* ignoramus dipshit.

Also, read this:

http://www.turbobygarrett.com/turbob...o_tech101.html

If you post more fail I will ban you.
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Old 08-08-2010, 04:06 PM   #12
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Quote:
Originally Posted by y8s View Post
arguably the .86 is overkill for sub 300 whp. i have the 2876 .64 and it's amazing at 250 rwhp (relatively low boost on my stock motor)
I believe RHarris put a .64 on his S6 and made low numbers, switched to the man's turbine and it came alive.
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Old 08-08-2010, 04:37 PM   #13
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Quote:
Originally Posted by delcbr View Post
ok thanks for the replys. so what difference does a larger .86 mean over the .64 ar does a larger ar make it longer and harder to spool iam unsure?
Google is your friend. We all googled to learn this stuff. Stop being lazy or you are going to **** everybody off and lose any goodwill you might have had coming.

Here:http://www.moddedmustangs.com/forums...ze-r-trim.html
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Old 08-08-2010, 06:07 PM   #14
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Matt, I bet the 76mm turbine on your setup combined with low boost and "low" torque makes the .64 housing work. With a 71mm turbine and anything beyond 250wtq, the .86 is a must-have.
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Old 08-08-2010, 06:34 PM   #15
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savingtowne, wanna swap chras and comp hsgs for a while? I'm curious.
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Old 08-09-2010, 11:52 AM   #16
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So much angry bitterness, wow.

You know, I bet if you include this info in that sticky these questions wouldn't get asked as often anymore. It's one of the few things I -DIDN'T- see there. (the A/R comparison, that is.)
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Old 08-09-2010, 12:04 PM   #17
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Originally Posted by Der_Idiot View Post
So much angry bitterness, wow.

You know, I bet if you include this info in that sticky these questions wouldn't get asked as often anymore. It's one of the few things I -DIDN'T- see there. (the A/R comparison, that is.)
Nice wish. If people read the stickies, I bet this forum's inquisitive posts would drop to nearly zero.
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Old 08-09-2010, 12:16 PM   #18
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Quote:
Originally Posted by Der_Idiot View Post
So much angry bitterness, wow.

You know, I bet if you include this info in that sticky these questions wouldn't get asked as often anymore. It's one of the few things I -DIDN'T- see there. (the A/R comparison, that is.)
if his question was about A/R I'm sure he would have gotten a bunch of non-sarcastic answers. thats a serious question and while we've had tons of discussions about different a/r's I don't think there's a thread dedicated to it.


His question was nothing at all like that.
No one is bitter or angry.
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Old 08-09-2010, 05:31 PM   #19
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Originally Posted by Savington View Post
Matt, I bet the 76mm turbine on your setup combined with low boost and "low" torque makes the .64 housing work. With a 71mm turbine and anything beyond 250wtq, the .86 is a must-have.
Sav, do you have any data on the tial housing on this same turbo? i'm thinking the .64 is good for a bit more but i'm having a hard time finding data.

EDIT: i just saw shlammed has tial housing. would appreciate any comments on the .64 vs .86.

appologies for the thread jack

Last edited by jasonb; 08-09-2010 at 05:55 PM.
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Old 08-09-2010, 06:02 PM   #20
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i have never ran a 0.64 housing.

if i can get 25 people to donate $10 i will dyno the 2 housings back to back.
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