cquestad

You could tow all day with a 64/13/65.

A 62/14/71 would be the same...

Rebuild yours first and try...before you leap money wise into twins...

homewrecker

Will the 64/13/65 give more top end?How much difference in spool up can I expect between the 62/12 and it?
Talked with HTT a couple weeks ago and it was like pulling teath to get a straight answer out of them with these questions.They just kept saying if you tow stick with what you have and acted as if anything else would be a huge mistake.Never once did they ask about the mods to my truck or act like it made a difference when I tried to tell them.They didn't support the idea of twins.They are just dead set on what will and will not work.Not saying they don't know what they are talking about but I feel there are some variables involved when it comes to performance mods and turbos.
lmills has been talking with me and I hate to keep picking his brain as I know he is a busy man.Just want to get this one right and be happy with the decission.

dieselfan

yes the 64 will give you more top end, its bigger= more top end= slower spool. the other questions you ask are almost impossible to answer cause so may factors come in to play, weather, tranny type, programmers, altitude,etc.

its hard to have both quick spool and lots of top end, unless you have twins. you usually have to trade one for the other.

cquestad

OK...

62/12 good for 450 hp...quickest spool
62/14/65 good for 500 hp...just slightley slower...but still fast
62/14/71 and 64/14/65 good for 550 hp...just slightley slower yet...tows great still
64/14/71 good for 600 hp....a little slower yet...have to drive around lower rpms but still tows well
66/14/71 and 66/16/71 good for 650 hp...will not spool till 1700 rpms...can tow but have to keep rpms up.
71 Bullets and A5ks...good for 700 hp (if tuned right...lol) and will not spool till 1800-1900 rpms...slow to 10 or 12 psi...but then screams. Requires a good driver to tow...but heck...I did for 100k!

Substitute a 13 ss housing for any of the 14 as an equal...flows like a 14 on top...but spools between a 12 and a 14.

I am thinking you want a 62/14/71 or a 64/14/65 if your target is around 550 hp...and still tow.

homewrecker

Thanks cquestad, that helps alot.Time to step back and think some before dropping the money.

dieselfan

Nice chart!

cquestad

I edited the 13ss subs for a 14 bit...read up.

"Substitute a 13 ss housing for any of the 14 as an equal...flows like a 14 on top...but spools between a 12 and a 14."

Tuf-4x4

I am in the hot shot business and I tow every day all day due to having a team driver. I tow anywhere from 8k-21k on top of my 9100lbs GN. Would I be able to get away with a Silver 64/14/71 or should I stick to II silver 62/71/14? I have many more mods coming such as AirDog 150, ATS exhaust manifold, Smarty + gauges and a converter & transmission from ATS.

dieselfan

dont forget about the 64/65/13 it would be more tow friendly than the 71.

metal_miner

***following is my opinion with no intention of ruffling feathers!!!***

My turbo evolution went from stock -> 62/12 -> 62/14 -> SPS66/71 -> SPS62/71 -> BD twins -> Super B/GT4202 twins. Note that the stock turbo is 57 mm and the Super B is 57 mm.

The pattern above is that I 100% fully admit that I fell into the mystic of trying a progressively bigger turbo, but in the end I've come back to the small turbos. This was because daily driving, towing, and stoplight-to-stoplight were the most important things to me.

I never ran a 64 turbo, but I did run a 66 turbo. The 66 royally sucked for towing. The 66 turbo was either "on boost" or "off boost" - basically nothing in between. When it was "off-boost", like during flat cruising, it smoked a constant stream. When it was "on-boost" it was either wound-up in one gear less than normal or driving 80+ mph. When running a 66 the mileage dropped 1.5-2 mpg on average due to the smoke stream and constant high cruise EGT.

You also tow very heavy and do this all day long 24/7. Therefore, driveability, mileage, and reliability would probably be your most important considerations. If it was me, I don't think I would want to tow at the fueling levels required to drive the bigger turbo from off-idle on up 24/7. That's just more wear-and-tear on the truck and the fun factor would wear out quickly.

The 64 would be in between my experiences of running a 62 and 66 turbo. So between the 2 turbos, I think you would be happier with the 62 version. It will give you the best towing manners, but give you the option of enjoying excursions of high power usage by relieving drive pressures better.

Further, when funds allow, just use the 62 as a building block for Nathan to build you a twin set!!

desertchecker

maybe I am blind but I did not see trans type in your sig tuf-4x4

the 64/65/13 would be a nice turbo for you if you have a manual trans if you run an auto I go for 62/65/13ss

later if you get money wise and go to twins either can be a great secondary turbo on top of an s400 etc

if I had only known in the very beginning how great a properly set up twin combo runs

my only wish is that I would have met nathan at MPI 2 years ago

thats about the time I started buying single turbos $$ trying to find that perfect set up that does not exist IMO ........unless of course you get twins

Luvnacumns

[QUOTE=JStieger;1922373]***following is my opinion with no intention of ruffling feathers!!!***

My turbo evolution went from stock -> 62/12 -> 62/14 -> SPS66/71 -> SPS62/71 -> BD twins -> Super B/GT4202 twins. Note that the stock turbo is 57 mm and the Super B is 57 mm.

The pattern above is that I 100% fully admit that I fell into the mystic of trying a progressively bigger turbo, but in the end I've come back to the small turbos. This was because daily driving, towing, and stoplight-to-stoplight were the most important things to me.

I never ran a 64 turbo, but I did run a 66 turbo. The 66 royally sucked for towing. The 66 turbo was either "on boost" or "off boost" - basically nothing in between. When it was "off-boost", like during flat cruising, it smoked a constant stream. When it was "on-boost" it was either wound-up in one gear less than normal or driving 80+ mph. When running a 66 the mileage dropped 1.5-2 mpg on average due to the smoke stream and constant high cruise EGT.

You also tow very heavy and do this all day long 24/7. Therefore, driveability, mileage, and reliability would probably be your most important considerations. If it was me, I don't think I would want to tow at the fueling levels required to drive the bigger turbo from off-idle on up 24/7. That's just more wear-and-tear on the truck and the fun factor would wear out quickly.

The 64 would be in between my experiences of running a 62 and 66 turbo. So between the 2 turbos, I think you would be happier with the 62 version. It will give you the best towing manners, but give you the option of enjoying excursions of high power usage by relieving drive pressures better.

Further, when funds allow, just use the 62 as a building block for Nathan to build you a twin set!![/QUOTE]


I agree 100%...

Julius... you need to head up here ina couple of weeks and do some dynoing and tuning with cquestad and I when Dave's done with my tranny!! Asuming it stops snowing so I can get the truck up there!!!

desertchecker

[QUOTE=Luvnacumns;1922472]All in favor 110 % ..............

metal_miner

Snowed 5" here in the last 3 hours and still falling heavy so it must be bad going from Wells to Jackpot now!

93 is bad enough as it is in good weather with the crazy drivers...

Luvnacumns

That for sure we got 12" here at the house.... And another storm on the way!!!