lets talk turbos....
#11
For not much more than the price of some of these stainless singles, you can have yourself a nice set of towing compounds. That will spool and cool great. Judging by your sig. You will want to do further trans upgrades if you plan on running 500hp.
Sean
#12
Sean, you are right about twins. I was referring to a single turbo. With all turbos you make a compromise...
Small turbo = stock or less expensive, fast spool up, good towing, limited power
Bigger turbo= laggy, not so good for towing, excellent power in the higher RPM/performance
Twins= best of both worlds, draw back is price. (this is negated if you can make your own)
Small turbo = stock or less expensive, fast spool up, good towing, limited power
Bigger turbo= laggy, not so good for towing, excellent power in the higher RPM/performance
Twins= best of both worlds, draw back is price. (this is negated if you can make your own)
#13
Whats wrong with towing at 500hp? I love being able to beat 3 series bmw's and A4's while towing. Especially the fact that I can't push the pyro past 1100. But thats why I run with twins. I can tow with my box cranked all the way up and not encounter any issues.
For not much more than the price of some of these stainless singles, you can have yourself a nice set of towing compounds. That will spool and cool great. Judging by your sig. You will want to do further trans upgrades if you plan on running 500hp.
Sean
For not much more than the price of some of these stainless singles, you can have yourself a nice set of towing compounds. That will spool and cool great. Judging by your sig. You will want to do further trans upgrades if you plan on running 500hp.
Sean
#14
#15
i will still talk to him. i have to call him this week anyway. but i do turn my blue chip off when towing if i leave it on the stuck smoke way too much. (never thought i would say that...) and that blue chip is most of my power right now...
#16
Towing at 500 heavy will probably get to much radiator heat. I usually tow at up to 400 and don't have much problems. The small twins I run work great towing , at 24,000 it will maintain speed on almost any hill. The real trick towing heavy is rpm's. If I see a big hill coming I usually kick it out of overdrive, the twins will get instant boost at 1800 or higher rpm's.
Turbos are a hard thing to size right, a hair to big and no response a hair to small and they choke to death on the top end.
Turbos are a hard thing to size right, a hair to big and no response a hair to small and they choke to death on the top end.
#17
As far as the draw back of twins being expensive, that is true. However, if you use your stock charger even having someone else build you a set up you aren't that much more than some of the singles on the market. These stainless housing singles run roughly 2200 plus the cost of a down pipe, etc... All said and done you are close to 2400 bucks. I'm sure you could get a nice twins set up for 3000 or less that used your stock charger and an s400 or ht3b.
Sean
Last edited by sstockton; 05-11-2009 at 05:12 PM.
#18
#19
well to state the obvious.
The 62/71 has a 2mm smaller compressor wheel. However the turbine wheel is 6 mm bigger. This equates to a slightly slower spool up but lower drive pressures and better flow on the top end. I would think the 64/65 would be a bit more prone to surge because the difference in the wheels isn't very big. but that is my PO. never messed with any of the 65mm S300s.
My 62/71 is kind of slow to spool until it hits about 10 PSI. After that it is an instant jump to 40PSI. I think it spools by about 18-1900 RPM. Never really pay attention i guess.
On injectors I would run some 100-150. Turn the boxes off and the charger will chugg along happy as a clam with either of those injectors.
Though I did notice you have a HR IP. I would still probably run some 150's though. Still a good driving injector but if your driving it hard it will probably overfuel the 62. Might not hurt to consider a 64/71 at that point.
The 62/71 has a 2mm smaller compressor wheel. However the turbine wheel is 6 mm bigger. This equates to a slightly slower spool up but lower drive pressures and better flow on the top end. I would think the 64/65 would be a bit more prone to surge because the difference in the wheels isn't very big. but that is my PO. never messed with any of the 65mm S300s.
My 62/71 is kind of slow to spool until it hits about 10 PSI. After that it is an instant jump to 40PSI. I think it spools by about 18-1900 RPM. Never really pay attention i guess.
On injectors I would run some 100-150. Turn the boxes off and the charger will chugg along happy as a clam with either of those injectors.
Though I did notice you have a HR IP. I would still probably run some 150's though. Still a good driving injector but if your driving it hard it will probably overfuel the 62. Might not hurt to consider a 64/71 at that point.
Last edited by kazairl; 06-19-2009 at 09:27 AM.
Thread
Thread Starter
Forum
Replies
Last Post
offroad00
12 Valve 2nd Gen Dodge Cummins 94-98
24
10-23-2014 03:28 PM