I'd probably stick with a 62/71/14, I've heard really good things about it and it should be about the right side for your sticks.

 

I thought that the 64 and the 150 sticks would be a good combo, but from what I am reading the turbo is too much and that is why I am not building the boost I should be.

 

If that turbo will make 55psi at 1750 rpm, it would be a great towing turbo.

I suspect that your tach is moving so fast that your 1750 is more like 2K.

jm0

 

heard that HOHN !

 

Hey HOHN if my waste gate isn't efficiently closed is it the diaphragm that is not closing it all the way?

 

No, 1750 is 55psi.
It SUCKS as a towing turbo.
WHY, Do you think 1750 is good?
I shift a gear, give it throttle and its LAG, LAG, LAG, LAG and then BAM, 55psi.

My 62/65/14 was a great towing turbo. I could get 45psi at 1400rpm after I had the head P&Pd.

If the head wasnt P&Pd, 2000rpm would be realistic. Even then, guys with 12 valves and Silver Bullets can spool them before 2000rpm.

HOHN, you need to stop reading turbo manuals, and actually try one. Just like your sig. says.
I remember you BEFORE you worked at Cummins, trying to convince people about turbo selections.

Remember, I have a fully ported and polished head.

Yes, everyone is entitled to their own opinion, but its only an opinion if you cant back it.

 

On a stock 12v head, my 62/71 starts to come alive around 1700 rpm. 55 psi at 1750 would be spectacular.

As for the silver bullet, it is just starting to come alive at 2k rpm. Thats on a 24v with a decent amount of fuel. Definitely not as friendly for low rpm driving as the 62.

 

See thats exactly what I dont want. I need my turbo to lite before 2k cause my towing is all around town stop and go @4,500 ft.
Dont get me wrong Id like to have a 62/71 for sure, but for what I use the truck for I think that would be too big and make me smokey around here.

 

I have a 62/68/14 waiting to be installed.
I think it will be the perfect towing turbo.

 

Dieselman Im interested in that 62/68. Ill give them a call and Let me know how you like yours sometime too. That sounds like a size that could work real well all around.

 

So after your head was ported and polished, it developed more restriction at a lower RPM and thus makes boost sooner? Sounds like an awesome port and polish job. Must have removed all of the factory swirl pattern and created non-laminar flow through the head.

 

my 62/71/14 HTT with my mods love it. I dont think it spools to slow for a 6 speed on 35's but take away my smarty and I wouldnt know what to do. its great with my mach 4's I live at 500-800 elevation when I drive to 5-6000k elevation I will barely hit 1150 at most this is killing a hill at 70 miles per hour. I think the 62/71/14 you would be happy with. call around ask rip at sourceautomotive.biz knows his work and his turbos he could at least give you some education and bs with you. he will beat anyones price. great bunch there.

 

When I had the P&P head done, I had the 62/65/14 before and after with no other mods done.

Before head the 62/65/14 would be at full spool around 1550rpm, with about 53psi of boost

After head full spool was around 1400rpm, with about 45psi of boost, and my egts were down 100*.

I was running the 62/65/14, with 140hp injectors, wit a 5sp., on a 97 12valve.