Te45a wheel questions

The 45a came in different various versions over the years. The most common was the old 11 blade 76 ptrim, which measures 65mm. The newer replacement for that wheel was the 10 blade f1 65 wheel , which is also 65mm. It also had a q trim option, which is 68mm. The q trim can be old school 11 blade, newer 10 blade gtq, or latest 10 blade hpq.
 
20psiofevil said:
You can make the 63 housing work if you keep the rpm below 5400. If you want to spin 6000+ you will benefit from an 85 ar. Basically engine rpm, cam selection, and cylinder head capabilities will dictate ar selection. With the small ar housings you typically run a higher cylinder pressure vs bigger ar housing allowing the engine to rev higher and become more efficient. Not everyone builds strictly for et though and like to maintain good transient response for street use.
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Yes, 5400rpm is pretty accurate. So, how narrow in the usable rpm range with true a/r .63 on a 6665? 434Nova has 3200 torque converter. So, 3200-5400rpm.lol That is a pretty effin narrow window! Good luck finding a converter to couple and work properly within that narrow rpm range. Now, he potentially lost at least 600+ usable rpm up top compared to a .85 a/r if his engine could swallow it.
 
The 3200 stall isnt flash stall.
As far as converters go, this is why you need a good converter. Low 10 to high 9sec power will flash a 17 blade PTC converter to about 5000rpm. 5000 to 5400 is plenty rpm to efficiently go down the 1/4 mile.
A 3200 stall 10" PTC at this same level will flash over 5500. This is why some peoples cars are going fast with small turbos, and others are stuck in the stone ages and just want a "stall" the higher the better I guess. Parts need to be picked to maximize the combo, not your mod list or cool guy talk at the car show.
 
Usable street power band is what i mean. Dusty knows how to find that narrow window that's why he has been so successful in TB and all over. Guy posted has Art Carr...

Absolutely I would run a smaller turbo than a 45a (6665)...I'm not gonna put a .63 on it as a bandaid.

I'm surprised at the replies I have read.

Forcefed3.8, would you personally agree with the advice given by all the members? To switch to a smaller housing on 45a? Do you think that good info?
 
I dont agree with a .63 garrett for low 10s, high 9s. At that level, the engine should be moving enough air that the spool up difference between the precision .63 and garrett .63 shouldnt be too noticeable. A .82 or .85 at this level did nothing but hurt spool up.
A local car with a stock cam and iron heads went from 10.7 with a 6676 that had the big diffuser .55 garrett compressor cover and a .63 garrett turbine housing to 10.3x with a 6776 h cover and .63 precision turbine housing.
 
TTA976 said:
Why would you put Garrett .63 which is a 450-500hp exhaust housing on a turbo which is rated over 700hp and able to swallow 73#/min? Sure it might work but there should be a particular match between compressor wheel and the A/R.
.85 would be a much better match...if it spools really slow, turbo is too big. Don't mask the problem by sticking a Honda like exhaust housing on it.
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I really do not give a damn about someone's alleged HP numbers for a turbo or housing, what I do care about is how well it performs. :)

In the past 20 years I have done probably a minimum of 2 TE-45A turbo a year, and any Precision housing sucks with a 45A in response and performance as compared to the Garrett housing, so don't give me your BS about it being like a Honda housing. :(

I have no idea what engine build or parts you use on hundreds of the performance GN's you have built, but when done right the 45A with a Garrett housing will kick your Precision ass anywhere, street or strip,

We have seen an easy 525 dyno RWHP with a Garrett 45A at 23 psi, and 10.0 at the track at 26 psi.

As far my attitude in this response, if you want to post actual data and better numbers for all your 45A builds with Precision housings as compared to the Garrett housing, I will then offer you an apology.
 
Nick Micale said:
In the past 20 years I have done probably a minimum of 2 TE-45A turbo a year, and any Precision housing sucks with a 45A in response and performance as compared to the Garrett housing, so don't give me your BS about it being like a Honda housing. :(
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Nick, a 66mm turbo low end will always suffer. Jam it in a tiny housing and make the same power up top as a 60mm later on the power band lol...effin brilliant!
 
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