Hi, I'm looking for a fast spool up time and trying to keep power from 400-450. I have 2 turbos I want to choose from, a gt35 turbo w/ 70.ar compressor and 68.ar exducer, or a T04B Compressor trim: .60ar / Exhaust Trim: .69ar. I'm not trying to break records on horsepower but I am trying to get the fastest spool up like a time track car. I want it the boost to kick in fast and hard. Which do you guys think it's best? Thanks
A fast spool turbo for a 1JZ
- Thread starter Tura_1JZ
- Start date
30R probably won't flow what he wants (regardless of exhaust housing/ common housing being .76 T3)
35R is the best bet as long as that .68 is a T4.. for T3, you'd be better off with the common .82
I used to think the 30R would be the response monster, but after experiencing cars with both the 35R isn't that much less in terms of response, and it gives you a much higher ceiling.
35R is the best bet as long as that .68 is a T4.. for T3, you'd be better off with the common .82
I used to think the 30R would be the response monster, but after experiencing cars with both the 35R isn't that much less in terms of response, and it gives you a much higher ceiling.
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Dylan JZ;1885849 said:
So you think the 30R can't reach 450whp with t4 .63? maybe just a tad bigger .68 if needed
Tura_1JZ;1885855 said:
Better..... Um well its all about goals and setups.
The 35r will have decent response and leave more head room if you decide to up the power a bit.
But I still think the 30r will spool faster and can support 450whp not 100% how much faster but ....
With all that said I'd go with a 35r personally.
GT3076R with a .75 T3 Twinscroll housing would be very quick. That turbine-housing is not original though, needs to be bought from the aftermarket and is a GT32 copy made to fit the GT30 turbine.
But the difference between GT30 and 35 are minimal... so you're probably better off with the GT35.
But the difference between GT30 and 35 are minimal... so you're probably better off with the GT35.
Turbo Habanero;1885850 said:
From all I have witnessed, one would really have to work the turbo to get those numbers (again, regardless of housing), and after one or two runs would be blowing hot air.. So, I don't think it's a realistic option unfortunately. Now for 400whp? Well, it might be good for that, but for such a small difference in response and big difference in potential, I stopped recommending it a while back. I used to be a huge proponent of the 30R because I took a lot of knowledge from the Aussie guys, who have always loved that turbo, yet even they have more or less come around to the same conclusions.
Radial;1885862 said:
Oops, yeah I said .76 because I was thinking 3076R. I meant to say .82 T3
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When I got my turbo I went with a comp 61mm with a .58AR TBB and I was told that it should be a quick spool and good power. Hopefully with this post I will find out if I made a good choice.
why not join the holset mafia. I'm pretty sure the he351ve VGT can do something amazing on the 2.5l
Tura_1JZ;1886015 said:
IMO, you really don't want anything smaller than a T3 .82 backhousing on these motors if you want flow up top.. the .63 will spool faster but it will be a midrange biased turbo.
From experience, you should make ~450whp at ~4k rpm (.82) provided you have the right supporting mods.
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No, the smaller rear housing, the faster the spool. However, a smaller rear will choke the motor at higher rpm. Depending on what you need it for, this may be a good thing, or a bad thing.Tura_1JZ;1886015 said:
Either way, if it is for track use, spend the extra few hundred for the ball bearing.
Since this thread is what I've been needing to ask, don't mind this hijacking. I'm looking at the precision 6262 with the v band housing. My question is how's the flow of the v band housing compared to a t4? Precision has .63 and .83 a/r options for the v band. What would be better for a street car with a 8k rpm limit?
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Well, first of all, I would suggest going with Garrett, Borg Warner, Turbonetics, or Comp before ever considering Precision because I have been enlightened in regards to their QC/design.. I do not feel they are very good turbos at all anymore. At one point in time they were, so don't get me wrong, but times change and so do companies.. I originally had my mind set of a 6262 with .68 T4 (best combo for that turbo on a 1J IMO) but went with BW S300 83-75 (aka S360) instead after doing a lot of research and speaking with those in the turbo rebuilding/engineering industry.
Anyhow, whether you take that advice is up to you. That being said, I am unsure as to how the v-band flows. Now, it is a cool idea to be able to quickly add or remove the turbo, but honestly the 4 bolts don't really bother me; the v-band for downpipes is another story haha. Maybe some others have more knowledge with that and can chime in.
Tial's housings for the Garrett line seem to follow the traditional OE sizing of the T3 flanges they have (assuming this means they flow roughly equivalent.. ?), so if that's true with the Precision too, then the .83 is going to be the one you're after.
Anyhow, whether you take that advice is up to you. That being said, I am unsure as to how the v-band flows. Now, it is a cool idea to be able to quickly add or remove the turbo, but honestly the 4 bolts don't really bother me; the v-band for downpipes is another story haha. Maybe some others have more knowledge with that and can chime in.
Tial's housings for the Garrett line seem to follow the traditional OE sizing of the T3 flanges they have (assuming this means they flow roughly equivalent.. ?), so if that's true with the Precision too, then the .83 is going to be the one you're after.