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Discussion in 'F/I Mods & Tuning' started by VaBchXRunner, Dec 21, 2007.
6-7k will get you a NICE non STS turbo setup with a GT35R :rock: enough said
just so its out there, I blew my rear cats in two days at 8psi with the sts kit on my 05 4x4
The only reason this guy paid $6K is because he paid for install and upgrades.
Install is really easy, requires no fabrication or special tools and can be done in about 8 hours with regular run of the mill tools!!!
I am going to look into what Gadget just posted. I have known him for a long time and I trust his judgement.
As stated previously this kit is not for everyone.
It is not for those wanting 600hp at the wheels.
It is a really good alternative to those looking at supercharging but want a little more.
Your correct thats about what we would charge for a kit with parts and labor.
It remains to be proven that it will net more performance I'd like to see an actual head to head dyno run with a URD or TRD
Tell STS to pay CARB for emissions testing so us Cali folks have more options.
here you go have fun :top::top:
now thats what you call a functional hood scoop and a deadly setup
I now have a new goal for our scoops. :rock: I barely understand how turbos and s/c work and I don't do any fabbing, but I'll be damned if I can't get 2 intakes under my hood like that!
(wishful thinking right, lol)
too bad our throttle body is in the front vs the back, im sure someone could make a hood able to hold 2 intakes like that inside a little taller scooop towards the back of the hood.
anything is possible just time and mone yis needed for it to be completed...
Sorry to drag up an old post, but I've heard blowers can use around 150hp in the boost making process.
Now a turbo might only be 20hp.
Maybe on a 900 hp setup, average draw on a streetable car is generally no more than 20%. I'm thinking back to jet engines but the old rolls royce drew about 220 on an 1100 hp motor.
Hah im just looking at this now too, old post but that sts dyno chart looks like it was made by my little brother in graphic arts class. Rpm to 5 grand? If they cant show the charts in full i dont wanna hear about numbers. Turbos in general like high revs which is why in my opinion our trucks are no where near the rite candidate for a turbo setup, by the time you start making boost you'll be dumping a gear.
Ok first things first, that graph was given to me by STS and I felt the same way from day 1. The graph is cheesy!!!
Sorry but if your logic was correct and it was, then the same principal applies to a SC. If you put on a big honker with the wrong trim wheel and the underdrive system is not matched for the rpm, then it will spool up equally as late.
Just like a SC, a turbo can be matched to an engines specific rpm, power and torque band.
Also, depending on the SC effiency, it can rob any where from 15% to 30% and may be even more. And when you say only 20%....from 239hp thats already 48hp being lost.
No doubt that SC are good and they are an easy modification requiring minimal fabrication......but when looking for big hp numbers......turbo is where its at!!!
Just my .02 cents:biggrin:
Top Fuel uses the roots style SC.
cause top fuel racing is so fast that any lag in low end power can't be tolerated - one of the reasons i'm going super instead of turbo - i can't stand having to wait for the boost
Get the right turbo and you wont have to wait for boost...
The advantages of having a big displacement engine, spool faster.
A supercharger is the perfect application for this truck for reliability now and longevity.
I am afraid that anything over 350 - 400 HP is really pushing it for the long term use of the vehicle (100K miles +).
I wouldn't run more then 8 PSI on these trucks if you plan on keeping it for a long time.
So given those circumstances a supercharger is the cheapest and easiest way to reach that threshold.
If you really want to try your luck and push the envelope with these trucks and go for 400 + HP then a Turbo is where its at.
That is not my cup of tea as I dont feel like replacing the motor anytime soon. If I was to drop some rods/pistons into this motor and cryo treat the trans then a turbo would be my choice.
There is no one using turbos in top fuel because they are illegal!!!
There is no way of controlling or regulating them like they do with the S/C....
Sorry but turbos are way more efficient then s/c any day of the week.
As for spool up.....like I said in my previous post. You can get the correct turbo and it will spool up just as fast as a s/c and make the same if not more power and..........give you the potential of making more if you want to.
As for reliability or longevity.......any setup turbo or s/c that is not tuned correctly, will cost you a motor. And because your only running 8psi does not guaranty that you will make it to 100k miles. It makes your chances a little better but no guaranty. If you place a well tuned turbo at 8 psi in there and you drove both the turbo and s/c the same way...they would both live the same.
I am saying the integrity of the 1GR motor really wont hold to much more then 8 PSI reliably. So if your goal is low boost (8 PSI) why bother running a turbo? Its not practical for the extra expense and work incurred with a turbo setup. I am saying that even a properly tuned setup on 13, 14, 15 PSI on these motors probably will not hold up to much abuse over a long period of time.
If I was to build the motor to hold boost id spend the extra coin on a turbo for HP potential; however that is not realistic with our trucks.
A supercharger continues to be the most cost effective reliable method of FI for this truck at this point in time.
I'm still sold on the fact that the TRD setup is still the only CARB legal and warrantied setup. 300 RWHP and no worries about it blowing up? Or having a EPA officer coming after you? Hell yeah!!
We all know that a turbo setup will yield much higher numbers, but it is impossible within it current form to maintain high numbers and reliability. Boost spikes, pushing oil up to the turbo from the pan, and the HEAT!! They all are problems associated with catastrophic failure of engines. The TRD and URD s/c systems do not rely on oil being pumped from the pan to the compressor. The TRD is entirely self-sustaining with sealed bearings while the URD has the oil for the traction drive, but is separate from that of the engine oil.
The only V6 truck with a turbo from the factory that I know of was the Typhoon (aka Cyclone I think), that was a very fast truck but would have blown head gaskets for life!!
And even then, no matter what your setup is there is ALWAYS lag. Its a turbo, by nature they are driven by exhaust gas pressure, and until the throttle is opened and the motor begins to burn the fuel and combust then a high pressure gradient must be achieved to push the turbine, then once the turbine is moving PAST atmospheric do you feel the boost. Whereas a supercharger, its a direct link that is linear once the throttle is opened. Yes, it has a higher parasitic loss on the motor, but there is also a parasitic loss with a turbo too, it is a obstruction within the exhaust gas flow.
There will be plus' and minus' to both sides. Fact-of-the-matter is that supercharger has more usable power for around town.
Not everyone wants their power to come on after they are already deccelerating from the first light!!:bird::bird: