ILLWIN

iTrader: (35)

What I am shooting for is a fast spooling turbo I can use on a 2001 Chevrolet X-Cab lowered 4x4 with stock or small stall converter. I want instant low rpm grunt. I am going to use a stock 5.3L with stock cam, only upgrades being valvsprings and pushrods.

I have a Garrett TP38 turbo which is a stock 1994-1997 Ford 7.3L diesel turbo.
The specs I have at this time are that it is 1.10 A/R on cold side and 1.15 on the hot side. Some forums I have seen people compare it to a T60.
I read about a guy on here Bill Reid who got similar results to what I am wanting and he used the T60.

I can get a 1.00 or .84 hot side if someone thinks that would help. From what I have read, lowering the hot side A/R number will give faster spool up, but reduce high rpm efficiency. Lowering the number can also cause high backpressure, this turbo is set up for a 3" exhaust outlet.

Any suggestions and help would be appreciated.

I added a copy of the compressor map, I have no idea how to make sense of it, if any of you do, that would be great!

OnyxSilveradoSS

iTrader: (4)

forcedinduction.com will show you haw to read the map.

your hot side is too big...and from my reading about budget turbo's is that you have so much otherr stuff to buy that if you add modding a turbo to the list you will be ahead buying one of the MP turbos that you know will fit and run.

good luck, I dream about turbos

WJ MARK

iTrader: (7)

yup thats too big, your also gonna have a hard time with fast instant spool without a converter. unless your doing a cam the springs and pushrods will probably be a waste of money. Its alot easier to buy a kit then piece one together and have a bunch of down time.

ILLWIN

iTrader: (35)

well, I went to forced inductions.com, the turbo is a pretty good match for a stock 5.3, any larger displacement or a cam change would run you out of the efficiency range of the turbo. It looks like it would run good at about 7-8 psi.

If I need a converter it won't be a problem, I just want it to spool quick and be fun to drive around town.

TrickTurbo

iTrader: (12)

7.3 is alot larger then a 5.3. Deisel use alot of pressure and low rpms, you would want to go with a 60-1 and small ar housing. This will give you good spool, but suck in the higher rpms. And yes a small ar will give more back pressure, but its all a trade off. Figure you truck mostly spends it time below 2K anyway probably would not be an issue. heres the trade off problem, when you want to spin the truck up, it will just run out of breath early, and create a lot more heat buildup in the pipe. Almost sounds like you are wanting a blower set up.?

ILLWIN

iTrader: (35)

So could someone please explain WHY the TP38 will not work? According to the map, it will be in the 70-75% efficiency range from 2000-5500 RPM on a stock 5.3. I don't want a T60, they cost $1200

Wilde Racing

iTrader: (26)

Look at the map, the turbo is too small. It starts to fall of at 400 hp range and drops like a rock after 500. keep in this is at the crank, SO IMO that turbo is wrong on both side... Too big of a exhaust a/r, too small of a of a compressor..

kbracing96

iTrader: (26)

I can sell ya a Master power T70 turbo brand new with a 1 year warranty for $600 shipped. I personally have one of these on my dads '72 Chevy I put a 5.3 in with only a LS6 cam and it runs great! A MP T70 can make 550-600 rwhp in these trucks.

OnyxSilveradoSS

iTrader: (4)

^^^^
what he said.
whats the MP 76 cost?

kbracing96

iTrader: (26)

T76's are $775 shipped