TA49 to GT6131E

[badgrandntl]

Just bought a GT6131E what do you think the performance gains will be, my supporting mods are listed in my sig.

Thanks and have a happy holiday!
Scott

 

[QUIP'6']

mike licht told me that will run mid to high 11's easy all day long

 

[Nocooler]

mike licht told me that will run mid to high 11's easy all day long

As will a Ta49

 

[Marc87GN]

As will a Ta49

The difference is, the PT/GT61 can do it on straight pump gas. I have heard of several people doing it with a GT61 on straight 93 and never a TA49 running 11s without help. There are a few people running 10.80s with the GT61. They didn't use the compressor wheel out of the GT-35R, which imports are using to make 600 whp, for no reason. I hope to post an 11 second timeslip in the spring on straight 93 because it's not common practice.

 

[John Wilde]

What is the back pressure like when you turn it up with the small turbine wheel?

 

[getchasum]

The difference is, the PT/GT61 can do it on straight pump gas. I have heard of several people doing it with a GT61 on straight 93 and never a TA49 running 11s without help. There are a few people running 10.80s with the GT61. They didn't use the compressor wheel out of the GT-35R, which imports are using to make 600 whp, for no reason. I hope to post an 11 second timeslip in the spring on straight 93 because it's not common practice.

But he asked about a 6131e which uses the same exhaust wheel as a TE44 or Ta49, and has the newer 61 compressor wheel.

I'm not knocking mine at all but I don't see any 11 sec passes in it w/o the gas.

 

[Marc87GN]

But he asked about a 6131e which uses the same exhaust wheel as a TE44 or Ta49, and has the newer 61 compressor wheel.

I'm not knocking mine at all but I don't see any 11 sec passes in it w/o the gas.

Here is a great post with losts of info and the change he is asking about. I changed everything at once so It's impossible for me to make the comparison. I just spoke to the people that make them and build them and they will tell you also, that the GT6132E is much more efficient and should make more power everywhere especially on the topend.

http://www.turbobuick.com/forums/showthread.php?t=149242&highlight=GT6131E

 

[Pronto]

Can the stock D5 be used or do you need higher stall converter, if so what stall?

 

[badgrandntl]

Thanks for the info, can;t wait to get the turbo on and put the alky, she should really fly. Thanks Scott

 

[2QUIK6]

I did alot of experimentation last winter with many different exhaust wheels on the GT61 and a few TE60 compressor wheels, including some with the GT35R exhaust wheel and several different A/Rs. With the 35R exhaust wheel, it made tons of power on the top end, literally would burn the tires off at 60-70 mph punch, 255 street tires that is, but took half a day to spool from a dead stop with only a 2700 stall convertor. (The experimentation was to see which would spool the best with the convertor I had)

The GT6131E was the favorite, I managed a 1.66 60' with it and 7.23 at 96mph in the 1/8 and only been to a 1/4 track with it twice, both times conditions weren't the best but did crack off a 11.63 with hardly any tuning.
I can run about 20# of boost on pump gas without any problems, so the charge temp is way lower than a stock or TA49/TE44 turbo....this is with a CAS V-4 stock location IC. With stock untouched heads, the GT6131E seems to like 24# of boost the best. I made some 1/8 passes at 28# of boost with no knock and didn't run any faster than the 24# passes.
And yes, the GT6131E has the smaller exhaust wheel than the base PT61, which uses a 52E exhaust wheel. The 31E is the same wheel as used in the base TE44 turbos that PTE sells.
I've been using the GT6131E now for a year, currently installing a PTS 3000 stall converter to hopefully lower the spoolup a little more, with your 3200 stall convertor, you should have instant spoolup.

 

[Pronto]

Mike Licht mentioned in his vendor post the possiblity of smaller Garretts with bb. If this turbo was a bb would it in your opinion need a higher still converter? I know people are running the te44 with a stock convertor and you say this has the same exhaust wheel so it it the size of the compressor that requires a higher stall?

 

[2QUIK6]

Mike Licht mentioned in his vendor post the possiblity of smaller Garretts with bb. If this turbo was a bb would it in your opinion need a higher still converter? I know people are running the te44 with a stock convertor and you say this has the same exhaust wheel so it it the size of the compressor that requires a higher stall?

With the smaller exhaust wheel, that means the exhaust backpressure will be a bit higher, which is why it will spool faster than the bigger 52E exhaust wheel...but this will also cost you some top end power compared to the 52E.
Yes, the spoolup is slower because the compressor wheel is bigger than that of the TE44 (you have more mass to spin).
To give you some sort of idea how fast the GT6131E spools with a tight 2700 stall convertor...if I do not start building boost before I set the second stage light at the track here's what happens:
Set second staging light and immediately stand on the pedal.
Watch boost gauge until it hits 10#
Launch at 10# of boost without ever looking up at the tree.
I end up with about a 1.6 reaction time...so you figure a good 2-2.5 seconds to build 10#...doesn't sound like very long but is an eternity at the track.

Sure, I'd think a BB version would spool even quicker..how much, I'm not sure, but it would be a sweet street/strip turbo.
I'm putting in a PTS Extreme 9x11 3k stall convertor, and it should be a looser convertor than what I have, I hope it will be a perfect match for the GT6131E since the regular PT6152E calls for a 3200 stall.

 

[Pronto]

Ya, that's what I figured on the spooling. My consern with the higher stall converters are heat (of course), expense and unpreditabliliy ie: which stall is best for combination and what happens if anything else gets changed. Not many people seem to talk about the looseness of the converter either. Some slip quite a bit at the top end costing alot of mph and raising the rpms too high. I would imagine then to compensate for that, they are being locked.

 

[2QUIK6]

Ya, that's what I figured on the spooling. My consern with the higher stall converters are heat (of course), expense and unpreditabliliy ie: which stall is best for combination and what happens if anything else gets changed. Not many people seem to talk about the looseness of the converter either. Some slip quite a bit at the top end costing alot of mph and raising the rpms too high. I would imagine then to compensate for that, they are being locked.

Yep, thats why I'm only stepping up to the 3000 stall, trying to only get enough stall that I need and not over do it, not to mention street drivability. The PTS 9x11 is supposed to be a very efficient convertor and does not care about being locked up alot at the strip.
I also have a trans temp gauge to keep an eye on things and try to always keep the temps below 200 degrees.

 

[Steve V]

This thread has me quite intersted, I have a GT3255E and think the 6131 maybe more suited to my combo since I have a 3000 stall and ported heads. I had a 44(with small exhaust housing) it crapped out so I bought a 3255 same spool feels just as fast,but of course I'd like more

 

[Pronto]

Is the 9/11 smaller and lighter than a D5 as well as being able to handle being locked?

 

[badgrandntl]

I am wondering if Becasue I have the stall for the GT6131E could I put a bigger exhaust housing on it? For example maybe a .83, would that help my top end

 

[2QUIK6]

I am wondering if Becasue I have the stall for the GT6131E could I put a bigger exhaust housing on it? For example maybe a .83, would that help my top end

Yes, that would allow it to breathe better on the top, not sure how much it would affect spoolup, but its an easy part it swap out if its too much.

 

[2QUIK6]

Is the 9/11 smaller and lighter than a D5 as well as being able to handle being locked?

Not sure, it is billet aluminum on one side. Post that question over on the Tranny forum and PTS will probably answer you. It definitely can handle being locked up, and not many tranny builders will recommend that but PTS doesn't care.

 

[Pronto]

Ok, I'll what comes up.