Turbo/intercooler/tst tech. ?'s

[JMS]

I'm new to TDR, but have been reading alot of the posts the last few weeks. Here are some of my questions before I fork out some more $$$ into my beloved money pit! This is a great site! Thanks for all the info. you all have posted, it's been a lot of help!



03 3500 srw, lwb, 4x4 crew cab 6spd, TST, 2pcs manf. , afe stage 2, TAG, 4"ss Magnaflow exh. , Banks big air intake, Southbend clutch, amsoil fluids, magtech cover, BD short shift. , 315/65/18 Toyos, daily driver.



What is the diff. between the sps62/64/14 and 6280/6480? What does the 80 or last two numbers stand for, not sure if it's 80 or not seen 62_?_? on another post. Which turbo will keep lower egt's while towing and maintain best spool up for daily driver. Will a larger intercooler effect spool up or anything else? Just trying to get some info. on the what, how's, and why's of each.



What is the diff. between the BD, spearco and Banks intercoolers. What makes one better or worse than the other?



Is it safe to set the TST torque higher than the hp setting and if so how much more torque over hp is safe for towing up to 25,000lbs or so? What would be the max safe settings for towing 10-12,000lbs. and when empty?



I recently cut out the plastic in the fender well in front of the air filter to make a bigger openning. I noticed alot less smoke at WOT, but the filter did get a little wet the last time it rained. Is there something I can I can do to protect the filter a little better? Has anyone tried the induction hood set up to the filter? Does it make a diff. ?



Would heat shield/raps around the turbo, afe airbox and torque tube help to produce denser air to increase hp. ?



Finally, who to go to for the best price on a package deal for the turbo and intercooler set up?



Thanks in advance to anyone taking the time to offer their input to all these ?'s



Thanks

JMS

 

[jwilliams3]

62, 64, and 66 people regularly refer to are turbo compressor wheel diameters measured looking at the front of the turbo where the air enters.

Both Industrial Injection and HTT market and sell these turbo's that are based off of a Borg Warner S-300 turbo.



The "80" number you are seeing thrown around is the diameter measurement at the turbine wheel's inducer which is inside of the housing. At the turbine wheels exducer which is what lets the exhaust out of the turbo the diameter on these turbo's is about 10 millimeters smaller. So a "Super" series turbo from II will appear to have a turbine wheel of 70mm looking at the rear of the turbo and measuring that diameter.

The non-super series or "Phat Shaft" series will usually have a 70mm wheel at its largest point and the exducer will be around 60mm's looking at it from behind.



Also, when you see say a 64/14 that means the turbo has a 64mm compressor wheel and what equates to a 14cm2 turbine housing. The turbine housing is the "hot" housing of the turbo where the exhaust exits.

Of the popular units mentioned above the 2 turbine housings available are 12cm2 and 14cm2.

The larger the housing you go the longer the spool time but the benefit will be that you can flow more exhaust out of the turbo at higher engine speeds.

For comparisons sake the stock turbo on a common rail has a 9cm2 turbine housing.



Compressor wheels. .

The larger you go the more time it takes to get it moving efficiently which increases spool time and shortens the power band.

However the benefits of the larger compressor wheel are lower egt's at WOT, and the ability to make more power.

The smaller the compressor wheel the more drivability is increased but top end performance can be hindered.

This also applies to turbine wheels. The larger you go the more lag you will see but top end performance is increases typically with larger turbine wheels.



The Banks intercooler is what I went with and for the price I am glad that I did. It includes all clamps, hardware, hoses and charge air pipe kit with increased diameters along with the famous high ram intake which is larger than the standard high ram that the market a la carte.



BD and Spearco also make very nice intercoolers but I still think the Banks kit is the best for the money.



I hope this helps a bit!