turbo size
03-11-2006, 05:52 PM
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turbo size
I have not had experience w/ differnt size turbos and amount of lag. So what size turbo would you recommend for about 600-625whp w/ the least turbo lag and I know I will have more thansome, but what is best? This will be on a fully built b18c. Money is no problem, but this will be for the street. I am thinking a gt35r, is that the best for my goal or is there better? I'm looking for some opinions also what size trim should I go with? Again remember money is not the problem I just want to get a good turbo the FIRST TIME!
03-12-2006, 01:41 PM
#3
Re: turbo size (murtnabila)
If you think you arn't going to the track at all, don't think about 625 WHP. 625 WHP and the street just means awful wheelspin, even on slicks. A .82 A/R GT35R would be a fine choice for a 600-625 WHP setup though.
03-12-2006, 02:00 PM
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Re: turbo size (boosted92)
thx for your reply, but I will definately be seeing a lot of track time. But the car will also see street time here and there. I want the least drag possible. Now out of your formulas how do you use them to figure the least drag? Just asking....
And when buying a gr35r is there different options in housings or anything else that I should know or somebody would recommend?
Like I said I know nothing of turbos yet, still learning. I have been researching too, but tell you the truth I'm more confused now then when I started!
And when buying a gr35r is there different options in housings or anything else that I should know or somebody would recommend?
Like I said I know nothing of turbos yet, still learning. I have been researching too, but tell you the truth I'm more confused now then when I started!
03-12-2006, 02:12 PM
#5
Re: turbo size (murtnabila)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by murtnabila »</TD></TR><TR><TD CLASS="quote">Now out of your formulas how do you use them to figure the least drag? Just asking....</TD></TR></TABLE>
Trim has nothing to do with lag or drag or anything, I thought I explained that. Trim is an arbitrary number used to differentiate between different size wheels inside the same family. It has no bearing or relevance to the performance of the turbo. A/R on the turbine side does, not trim, and a lot of people confuse the two.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by murtnabila »</TD></TR><TR><TD CLASS="quote">And when buying a gr35r is there different options in housings or anything else that I should know or somebody would recommend?
Like I said I know nothing of turbos yet, still learning. I have been researching too, but tell you the truth I'm more confused now then when I started!</TD></TR></TABLE>
Your only real options for housings is the two choices of turbine A/R (.63 and .82 A/R) and a ported shroud if you want. The GT35R compressor wheel is basically maxed out period at 650 WHP, so if you're pushing it that hard I would definitely run the .82 A/R turbine housing. A ported shroud compressor housing is designed to eliminate compressor surge when you're running a massive turbo on a small displacement motor. I havn't had a problem with compressor surge on GT35R's, and I've heard that the ported shroud compressor covers will cost you some top end horsepower, so I would just stick to the standard TO4S cover.
Trim has nothing to do with lag or drag or anything, I thought I explained that. Trim is an arbitrary number used to differentiate between different size wheels inside the same family. It has no bearing or relevance to the performance of the turbo. A/R on the turbine side does, not trim, and a lot of people confuse the two.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by murtnabila »</TD></TR><TR><TD CLASS="quote">And when buying a gr35r is there different options in housings or anything else that I should know or somebody would recommend?
Like I said I know nothing of turbos yet, still learning. I have been researching too, but tell you the truth I'm more confused now then when I started!</TD></TR></TABLE>
Your only real options for housings is the two choices of turbine A/R (.63 and .82 A/R) and a ported shroud if you want. The GT35R compressor wheel is basically maxed out period at 650 WHP, so if you're pushing it that hard I would definitely run the .82 A/R turbine housing. A ported shroud compressor housing is designed to eliminate compressor surge when you're running a massive turbo on a small displacement motor. I havn't had a problem with compressor surge on GT35R's, and I've heard that the ported shroud compressor covers will cost you some top end horsepower, so I would just stick to the standard TO4S cover.
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