Input on this turbo?
#1
Full Member
Thread Starter
Input on this turbo?
Looking to make my final decision tonight on my new turbo. I'll be going with a precision 6262.. My question is what would be the best a/r on an s5 mildly streetported, all the fuel mods and pfc ecu..my goal is a high 3 to low 4 hundred bracket.. Trying to make this motor last and put down some good power on the street... The options are:
t4 .68
t4 .63
t4 .58
Anybody have any input? From what I've gathered a .68 might be too big I was thinking of either a 63 or the 58 for faster spool...
t4 .68
t4 .63
t4 .58
Anybody have any input? From what I've gathered a .68 might be too big I was thinking of either a 63 or the 58 for faster spool...
#4
Full Member
Thread Starter
I'm looking into buying a precision turbo because I get good prices on them and I have a friend who works closely with them, thus eliminating any customer service or product issues. Any input on the stuff I posted?
#5
Original Gangster/Rotary!
iTrader: (213)
I wouldnt go with any A/R lower than a 1.0 on a rotary, certainly higher than any you have listed. You don't want a restriction in the turbine housing..... you want the turbo to breath, esp at 390+ rwhp.
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#8
Full Member
Thread Starter
Really? That's what I keep reading but my mechanic is somebody who's been around for over 20 years, pretty much the king of circuit down here, very well known and respected in the rotary scene.. He tells me he doesn't see the purpose of getting " one of dem giant turbos, they are too big and take too long to spool up on de street. You wan something nice and of average size"..He recommends I don't take it past 375 on the 13bt because it isn't practical for street use and it isn't healthy for the motor.. Anybody have any input on this?I'll be tuning on 94 octane...(no meth, no racegas) The guy who's supplying me with the turbo recommends this one, he says similar ones are working well for other people in the honda scene and they spool up quick.. I just don't want to get something too big for the street.. Very responsive and good for everyday driving but able to make the power I want well...
#10
Full Member
The guy who's supplying me with the turbo recommends this one, he says similar ones are working well for other people in the honda scene and they spool up quick.. I just don't want to get something too big for the street.. Very responsive and good for everyday driving but able to make the power I want well...
Heaps on good info on this site regarding this. Agreed with one of the above posters that the turblown TD61 seems to be doing good things.
#12
Full Member
Some discusion here and links to other threads with further discussion....
https://www.rx7club.com/single-turbo-rx-7s-23/precision-6262-turbo-836192/
https://www.rx7club.com/single-turbo-rx-7s-23/precision-6262-turbo-836192/
#14
Full Member
Thread Starter
So I'll be going with the .82 ar precision 6262(62mm)... I'm looking for boost at 2500-3000 not 5.. This is an s5 t2 not an rew not looking to port it too much. My last motor was ported out to the point that one of my exhaust inserts melted and destroyed the engine.. Not looking to go to crazy with the porting I think this should be fine.. Correct me if I'm wrong here...
#15
Full Member
Thread Starter
The only solid advice anybody has given me is to "buy a borg warner,buy a turblown, look at this thread full of people arguing back and forth about precisions quality control" or "rotaries love big a/rs" I keep asking FOR MY SETUP, FOR WHAT I WANT TO DO WITH THIS TURBO, FOR THE POWERBAND I WANT. What is a good a/r? I'm listening there are just too many people throwing different answers at me and I don't need a turbo that will only kick in at 5500 rpm. I may be coming across as an idiot but I have to get moving with this so Im trying to get solid answers. Apologies again to those that are being helpful.
#17
Full Member
So I'll be going with the .82 ar precision 6262(62mm)... I'm looking for boost at 2500-3000 not 5.. This is an s5 t2 not an rew not looking to port it too much. My last motor was ported out to the point that one of my exhaust inserts melted and destroyed the engine.. Not looking to go to crazy with the porting I think this should be fine.. Correct me if I'm wrong here...
I like the TD61, but when I see it make close to 500hp I kind of think it has all this excess capacity beyond my needs, and having that capacity in reserve is costing me response and midrange. (I may be wide of the mark heer so feel free to correct me)
#18
Original Gangster/Rotary!
iTrader: (213)
Hate to break it to you, but something like the A/R of the turbine is NOT GOING TO MAKE A HUGE DIFFERENCE, IE SPOOL AT 3000 VS 5500 RPM.
Thought I'd yell a bit since you seem to like doing it
Btw, do you understand what A/R is and what it means? www.TurboByGarrett.com has some good info in their tech section under 'Turbo 101.'
Thought I'd yell a bit since you seem to like doing it
Btw, do you understand what A/R is and what it means? www.TurboByGarrett.com has some good info in their tech section under 'Turbo 101.'
#19
Full Member
Thread Starter
Be keen to hear how it works out. Looking for similar performance myself. 400whp max on e85 with the best response and torque I can get.
I like the TD61, but when I see it make close to 500hp I kind of think it has all this excess capacity beyond my needs, and having that capacity in reserve is costing me response and midrange. (I may be wide of the mark heer so feel free to correct me)
I like the TD61, but when I see it make close to 500hp I kind of think it has all this excess capacity beyond my needs, and having that capacity in reserve is costing me response and midrange. (I may be wide of the mark heer so feel free to correct me)
#20
Full Member
Thread Starter
Hate to break it to you, but something like the A/R of the turbine is NOT GOING TO MAKE A HUGE DIFFERENCE, IE SPOOL AT 3000 VS 5500 RPM.
Thought I'd yell a bit since you seem to like doing it
Btw, do you understand what A/R is and what it means? www.TurboByGarrett.com has some good info in their tech section under 'Turbo 101.'
Thought I'd yell a bit since you seem to like doing it
Btw, do you understand what A/R is and what it means? www.TurboByGarrett.com has some good info in their tech section under 'Turbo 101.'
#21
In the burnout box...
iTrader: (32)
If you want a better spool it's a good idea to have a divided inlet and to keep the a/r "smaller". It's such a vague statement as you really need to look at the turbo as a whole. Relation from the compressor wheel to the turbine wheel is crucial. I still maintain my statement I posted before but you seem to be a blind believer like "Neo" in the matrix. Goodluck...
#22
Full Member
Thread Starter
What I think your doing is trying to harp on me for amusement or points here on the forum. I think I've already stated 40x that I will be buying a Precision product.i understand you prefer Borg Warner personally but I have a good connection on precision for price and service. From what I've read and what I've seen they seem to be doing well for a lot of people so it makes no sense to go with anything else. If you were commentinv on the turbo or a turbo within that brand it would be more helpful. I appreciate your input nonetheless.
#24
In the burnout box...
iTrader: (32)
I'm not trying to harp on anyone here. I'm trying to save you money and time. If I had permission I would tell you a nice story about Precision turbos, though I can't. I'm not trying to start a pissing competition but I have a lot of experience with with turbo's of all brands. I'm not someone that's bias and sticking to something that I only have experience with.
I don't care if I could get a billet setup for $600. Their quality is equivalent to ebay; this isn't an opinion of mine just a direct observation in person with more than one unit. You wanted advice, I'm giving it to you. If want AR advice I'll simply say go with something in the .8-.9 range.
I don't care if I could get a billet setup for $600. Their quality is equivalent to ebay; this isn't an opinion of mine just a direct observation in person with more than one unit. You wanted advice, I'm giving it to you. If want AR advice I'll simply say go with something in the .8-.9 range.
#25
Arrogant Wankeler
From what you are asking it sounds like you are looking at simply too large a turbo for your target power. A/R isn't going to change spool/boost threshold rpm that much.
I would guess you would be better off with a compressor inducer around 53-58mm inducer and a slightly smaller turbine than the 62mm exducer to get your lower boost threshold/response.
What people are telling you is right, run a really tight A/R on a turbo which is already a bit lop sided front to rear is asking for something that is inefficient across its entire operating range, slower to spool than a smaller turbo and won't make the power the wheel sizes suggest.
I would guess you would be better off with a compressor inducer around 53-58mm inducer and a slightly smaller turbine than the 62mm exducer to get your lower boost threshold/response.
What people are telling you is right, run a really tight A/R on a turbo which is already a bit lop sided front to rear is asking for something that is inefficient across its entire operating range, slower to spool than a smaller turbo and won't make the power the wheel sizes suggest.