Best turbo for pump gas? TA33? 49?

[EyeTalk2Trees]

just wondering what size injectors match up with a 33 and a 49? 30#? 36#?? bigger. does the match in an IC car correspond in a Hotair?

 

[boostmaster]

Injectors

30lbers for mild street, right up to 42lbers, all depends on what you want. If your running the TA33 36-37lbers are a good complement. If your running the Ta49 I'd go with 40-42lbers. with proper mods and a good tune either one of these combo's "theoretically" can take you deep into the low 12's - high 11's.

 

[Donald McMullin]

The following are some compressor information about a TA49 and TA33. I have made some assumptions regarding VE, IC efficiency, and operating conditions.

TO4E 60 Trim (TA49/TE44)

@ 5200 rpm, boost 17 psig, P/R= 2.16, HP=372, Air Flow=34.2#/min
@ 4200 rpm, boost 17 psig, P/R= 2.16, HP=310, Air Flow=28.6#/min
Surge Line @ 17 psig at 3400 rpm
Center of compressor Efficiency Island @ 14.5 psig (P/R=1.99) at 4700 rpm and Air Flow=29.6#/min.

TO4E 57 Trim (TA34 which I have)

@ 5200 rpm, boost 17 psig, P/R= 2.16, HP=368 Air Flow=34.0#/min
@ 4200 rpm, boost 17 psig, P/R= 2.16, HP=311, Air Flow=28.7#/min
Surge Line @ 17 psig at 2800 rpm
Center of compressor Efficiency Island @ 14.5 psig (P/R=1.99) at 4300 rpm and Air Flow=27.0#/min.

From the listed information you will note that the 57 trim compressor has better efficiency at lower rpm and most important the surge line is intersected at lower rpm.

If you operate in the range of 3000 to 5200 rpm and at a boost of 16 to 19 psig, I do not see any reason to use a 60 trim compressor (TA49/TE44). If however you are running race gas and higher boost levels the 60 trim would be a better choice.

Using a 57 trim compressor I ran 12.02s ET using a stock long block, but I was pushing the boost above 23 psig. Around town on 99 motor octane fuel this turbo was great even running 20 psig boost. When I run 93 pump fuel I back the boost down to 18 psig and back the timing down about 4 degrees.

I know that your hot air is different, but I still would look for the a turbo that is the most effecient in the range that I would be operating in.

Good Hunting
Donald McMullin

 

[Jerryl]

Re: ta33

Originally posted by buickpower
just for the record, the ta33 flows ~700cfm, and the ta49 flows ~800cfm. Also, the ta33 does not have the stock turbine, it is a good deal larger with alot different (higher) pitch.

Still confused on this age old question.
I am easily confused
Remember that this is all theoretical ...............

Talked to Limit and the
TA33C flows 53 lbs/min or around 660 CFM.
That should be good for around 438 HP or 11.8@116 mph in a 3700 lb car.
You will need 47lb/hr injectors @80% duty cycle or 37 lb/hr injectors at 100% duty cycle.

TA49 seems to be food for up to 545 HP and should flow around 66 lbs/min or 817 CFM.
This should be enough for a 11.03@124 mph run with a 3700 lb car.
Required injector is 57 lbs/hr @80% duty cycle or 45 lb/hr at 100% duty cycle.

Clearly, the TA49 is a better choice for performance per the numbers (I have NO idea on lag etc)
So, does anyone run a TA49 on a Hot Air and where did you get such a beast?

 

[buickpower]

remember that the quarter mile calculators use horsepower at the wheels . Also, yes the 49 would be better, but you have to make up a bracket to mount it on our cars. I think that's why alot of people opt for the 33, since it is just bolt on, but yeah the 49 is a bigger and better flowing turbo.

 

[buickpower]

here is a link to a thread that discusses the clocking and grinding required, check out the post by JayLashua. There are also a few other threads about it if you search for them

http://www.turbobuick.com/forums/showthread.php?s=&threadid=53578&highlight=ta49+on+a+hotair

 

[turbogimp]

i have a PTE TA-48 and love it. the guys at Precision Turbo told me that its very close to a TA-49 witch supports up to about 520 horsepower. its also bolt on. if you want to check it out Nathyn let me know i would be glad to show it to you.

 

[fullahotair]

thanks john,

I actually started this thread a good while ago, and it has since been brought back to life. Since starting this post i got a great deal on a TA33. I would like to see your car sometime, mine should be in the paint shop now, but i still need to put it ALL together...hopefully by mid summer...

Nathyn

 

[Jerryl]

So ......... What is the difference between the TA48 and TA60?
Just got off the phone with precision and they stated that a TA60 will support around 545 flywheel HP.

What stall are you running with the TA48 and what are your times if any?
Excuse my ignorance, but thought that the TA60 would be a bigger turbo and would flow more?

 

[turbogimp]

well i had the stock converter restalled to 3200 but, i think im only seeing about 2800. im no expert on stall speeds so the only thing that i know is that there was a major differance in spool up time after that was done