gt28rs or gt2871?
- Thread starter wicked
- Start date
Mental Addiction
Banned
The GT2871 will fit on the MSP manifold.All you have to do is spacer back the Wastegate accuator.
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- MP5T / 944
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- MP5T / 944
I noticed that. Thought you might be able to find a compressor rather close..
You might have to go to Garrett
You might have to go to Garrett
If no internals or tubular mani, go with the 28RS. I have experienced both and the 2871 takes longer to spool at lower psi and a log mani then the 28rs does. I have a T3/T4 and the 2871 spools like it does, very laggy compared to the 28rs. The 28rs is a monster turbo and I think a better match for the stock mani and block.
Now if you are going forged and a tubular mani, then the 2871 all the way. You'll be able to get in the turbo's sweet spot then. It don't think it works as well at lower boost and a non tubular mani. But if you run the boost and have the mani, go for it!!
Now if you are going forged and a tubular mani, then the 2871 all the way. You'll be able to get in the turbo's sweet spot then. It don't think it works as well at lower boost and a non tubular mani. But if you run the boost and have the mani, go for it!!
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- MP5T / 944
I Ploted the GT-28RS on a FS engine running 7000 RPM. The RS is the "Sweet Spot" Check out the Blue Dots... They represent worst case senario...
The Red is the T-25 on the MSP...
The Red is the T-25 on the MSP...
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- MP5T / 944
Full crank Balance with Flywheel, Alignhoned, stronger wrist pins, no rev limiter...Reinforced Mains...
I wanted to plot the graph at worst case senario, if you re plot it for 6500 the dots actually appear to run down the middle.
I wanted to plot the graph at worst case senario, if you re plot it for 6500 the dots actually appear to run down the middle.
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- MP5T / 944
MPNick said:
I understand that there is more to be had out of a T-25, but the jump to a GT-28rs will yield a slightly higher boost threshold (300 RPM Differnce) with a FAR BETTER effency rating. Basically, take any T-25 and run it at 20 PSI, it will have to spin much faster and blow hotter than a Shelf GT-28RS. Peroid.
The GT-28RS makes more boost, colder at the loss of 300 RPM later spooliing.
Money in the Bank. The Bearing will last longer, the engine wil be less likely to detonation, and your FMIC will cruise allong rather than work overtime...
The Disco is not required for high HP, but if you are spending the money to make an engine that can hold 20+ Psi, drop a grand and get a RS at the same time...
Brian MP5T said:
after going through this thread again,reading other articles,comparing maps,and considering how far I am willing to take this,I decided I will be going for the RS
motor is getting built now,but will keep stock mani,atleast for a few months.
and the head will be ported,flowbeanched,and with custom cams.
3" exhaust thermal,4" custom turbohoses intake,water injection,FMIC W/ 2.5' piping,repaired LSD,MPI,custom fuel setup,I think I should be laying down a good amout
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- MP5T / 944
You won't be disapointed with the GT-28RS. It will spool a bit later than the T-25 that you are used to, but will throw air like nothing and not start to heat until 24 PSI..
Good Choice.
Good Choice.
fsdet-I'm still going to spray,because it helps cool combustion chambers,allowing you to boost more.it also acts like a EGR,only better because water will expand better when heated than nitrogen.
fast lane-going to MAP,sorry didn't add everything into the list,theres still a lot more.
is 80mm close to 4"?I don't think it would work with my intake.I'll try to post some pics later.
fast lane-going to MAP,sorry didn't add everything into the list,theres still a lot more.
is 80mm close to 4"?I don't think it would work with my intake.I'll try to post some pics later.
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- MP5T / 944
FSDET said:
Agreed, Not required...
20 Psi on a T-25... Perhaps. But if the plan is to go with a GT-28rs on a built motor, it is fine all the way to 25 PSI.
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- MP5T / 944
wicked said:
It also displaces the air in the chamber. (Slightly) You may end up with running more boost, with more heat and have to use the injector and end up with Less Net HP or Lower Than Expected results. It works very well, has for 60 Years, however it's a stop gap solutior for a larger problem. A FMIC will be more than able to do the job by itself if the Core is effecient and sized for the requirements of the system...
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- MP5T / 944
The TB is important for flow but it's not as vital as if you were doing a N/A build...
