Is a single gt4294 too much?
I agree with you on kit design. Take the same setup and put a TC unit with lighter wheels and a smaller compressor cover to fill and it will come on sooner. The Garrets are extremely nice but they are not the end all for every application. I am a fan of the BW stuff myself, but I know its not the God of all turbos for every application.
Very true, part of the reason why we build units from all 3 manufactures and then some. Some just work better in certain applications.
Oh don't get me wrong; I'm not a garrett *****. I've used hybrid holsets and other off the wall setups in the past. But I've used a lot of Garrett based turbos in the past with good success. Used to be, they were the only ones who published their maps.
I do think the common perception of kit design focuses far to much on this number or that and not enough people take a holistic view of their design and balancing the system. A well designed system should be greater than the sum of it's parts.
I do think the common perception of kit design focuses far to much on this number or that and not enough people take a holistic view of their design and balancing the system. A well designed system should be greater than the sum of it's parts.
TECH Regular
Joined: May 2005
Posts: 485
Likes: 0
I don't know how anyone could debate which turbos are better. Unless you have power restrictions and a motor to build the boost fast enough the spool time won't be noticable... then the cheaper turbo is the obvious alt choice.
But I can't see how anyone can say BW's Extended Tip turbos don't own all. It's all in it's performance and on paper. 74mm BW will flow 120lbs/min at max potential. That outflows even the best of the GT42 series turbos... which are 76mm (I think).
Then if you want smaller. Their 56mm can flow up to damn near 65lbs/min!!
But I can't see how anyone can say BW's Extended Tip turbos don't own all. It's all in it's performance and on paper. 74mm BW will flow 120lbs/min at max potential. That outflows even the best of the GT42 series turbos... which are 76mm (I think).
Then if you want smaller. Their 56mm can flow up to damn near 65lbs/min!!
Thank you for that. I would have said it too. We are using a 74mm BW unit on a GTO. Spools at 3k and makes big power at low boost levels and does not make so much hot air.
TECH Regular
Joined: May 2005
Posts: 485
Likes: 0
That thing should push another 4-5psi as well.
Well it made the 565 at 12spi with a 9.8:1 afr and 10 degrees of timing. We went to 16 degrees with a 11:1 afr and made 659 at 12psi. Then we went down to 14 degrees total and made 689 on 13psi and then made 735 with the same total advance at full power with 15psi and made the 735. Right now rolling down the road with 20-30 degree IATs vs. the 100-110 on the dyno we are seeing 18-19 degrees of advance. I would imagine its a 800 or so right now on the street. It still has room to grow too.
TECH Regular
Joined: May 2005
Posts: 485
Likes: 0
Well it made the 565 at 12spi with a 9.8:1 afr and 10 degrees of timing. We went to 16 degrees with a 11:1 afr and made 659 at 12psi. Then we went down to 14 degrees total and made 689 on 13psi and then made 735 with the same total advance at full power with 15psi and made the 735. Right now rolling down the road with 20-30 degree IATs vs. the 100-110 on the dyno we are seeing 18-19 degrees of advance. I would imagine its a 800 or so right now on the street. It still has room to grow too.
Not full on we are building strong at that point though. Its making about 6 or so at that point and comes full on shortly after. On the dynojet dyno it came on a bit slower then the street of coarse.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo TECH Regular
Joined: May 2005
Posts: 485
Likes: 0
My friend has a S256 in his Neon SRT. He makes 21psi @ 3k. My other friend has a GT3582r and makes 20psi @ 4k. The GT3582r flows @ 61lbs/min. The S256 flows at 58lbs/min!! I think that's just crazy... BW FTMFW!!
Oh mah bad. I wonder what a GT4202r would spool at in the same situation?
My friend has a S256 in his Neon SRT. He makes 21psi @ 3k. My other friend has a GT3582r and makes 20psi @ 4k. The GT3582r flows @ 61lbs/min. The S256 flows at 58lbs/min!! I think that's just crazy... BW FTMFW!!
My friend has a S256 in his Neon SRT. He makes 21psi @ 3k. My other friend has a GT3582r and makes 20psi @ 4k. The GT3582r flows @ 61lbs/min. The S256 flows at 58lbs/min!! I think that's just crazy... BW FTMFW!!
You will love our FI58 then when its released. It will be in a small package as well and flow 62lbs/min, and also in BB and water cooled if you like. Or you can move up to our FI62 which will be offered in BB as well and flow 72 lbs/min....lol
TECH Regular
Joined: May 2005
Posts: 485
Likes: 0
You have any more info on these turbos? I never heard of em' until this thread. How are they performing in comparison to the S series turbos? From (Don't flame me) Bullseye or yourself?
I don't know how anyone could debate which turbos are better. Unless you have power restrictions and a motor to build the boost fast enough the spool time won't be noticable... then the cheaper turbo is the obvious alt choice.
But I can't see how anyone can say BW's Extended Tip turbos don't own all. It's all in it's performance and on paper. 74mm BW will flow 120lbs/min at max potential. That outflows even the best of the GT42 series turbos... which are 76mm (I think).
Then if you want smaller. Their 56mm can flow up to damn near 65lbs/min!!
But I can't see how anyone can say BW's Extended Tip turbos don't own all. It's all in it's performance and on paper. 74mm BW will flow 120lbs/min at max potential. That outflows even the best of the GT42 series turbos... which are 76mm (I think).
Then if you want smaller. Their 56mm can flow up to damn near 65lbs/min!!
Nobody has matched the performance of our S-series and selection availability with the BW's. Now the new FIXXX units bring it to the next level in customizing and new options.
TECH Regular
Joined: May 2005
Posts: 485
Likes: 0
So, do you have any actual DATA that compares spool time on the same car with the two different turbos? On the neon thing, is it the same turbo kit and everything?
DrTurbo, do you have any compressor / turbine maps I could look at, so I can see what everyone is talking about?
DrTurbo, do you have any compressor / turbine maps I could look at, so I can see what everyone is talking about?
TECH Regular
Joined: May 2005
Posts: 485
Likes: 0
So, do you have any actual DATA that compares spool time on the same car with the two different turbos? On the neon thing, is it the same turbo kit and everything?
DrTurbo, do you have any compressor / turbine maps I could look at, so I can see what everyone is talking about?
DrTurbo, do you have any compressor / turbine maps I could look at, so I can see what everyone is talking about?
Just a basic turbo kit otherwise. Nothing special