Danville 2.6vvt / S480???
- Thread starter seth999
- Start date
What's your power goals? This is similar to what I want to do, but gate the vvt to keep the drive pressure & EGTs down.
The twins on my LBZ are my 68mm Stg3 w/3" S480 and I am thinking about dropping down to my 2.6" charger for winter driving, lol. I have not drivin a S480 twin setup yet but as fast as my truck is I wonder how much different mine would drive with an S480. I am already well past the breaking point so.....
I have a bolt on Waste gate kit coming for the VVT crowd
shouldn't be too far out . S480 /Gated VVT could put down some decent #'s IMOP Should work fine , VVT twins work decent , but are never as optimal as they could be with a better flowing turbine or waste gate
Why would a person want a wastegate on a VVT, Trent?
A VVT turbo with the vain's all the way open does not flow enough IMOP , especially in a twin setup, or a guy wanting to push the stock turbo or spray it , waste gate would be a lot cheaper than after market VVT and think the gains would be be good for the $$ spent .Ever wonder why the Stock LB7 turbo can make more power with a much smaller compressor wheel ?
A VVT turbo with the vain's all the way open does not flow enough IMOP , especially in a twin setup, or a guy wanting to push the stock turbo or spray it , waste gate would be a lot cheaper than after market VVT and think the gains would be be good for the $$ spent .Ever wonder why the Stock LB7 turbo can make more power with a much smaller compressor wheel ?
No, never did...I just know it works pretty well.
So do you modify the tuning to keep the vanes stationary and let the wastegate do all the work? Sorry, Im just not seeing it.
thanks for the advice keep it coming :thumb: I would consider the s366 as the little turbo but the danville is already on it and I'm really liking it as a single so I figured I would build off of it...I'm thinking I can attain my goal with it fairly easy I'm looking for 700hp but plan on cp3 work(IDK I just think big singles are cool), sticks(prolly 60 over LBZ nozzles), and studs...I plan on stopping there for a while ( thats what i said after exhaust n a box tuner too ) but will prolly end up with a motor build started
^^^I'm thinking he means removing the vanes not sure though
) but will prolly end up with a motor build started^^^I'm thinking he means removing the vanes not sure though
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I have a bolt on Waste gate kit coming for the VVT crowd
Should work fine , VVT twins work decent , but are never as optimal as they could be with a better flowing turbine or waste gate
Looking forward to it Trent:thumb:
I have a bolt on Waste gate kit coming for the VVT crowd
Should work fine , VVT twins work decent , but are never as optimal as they could be with a better flowing turbine or waste gate
Yep, this is what I do when I build my current sets, by building a waste gate to go around the stock VVT to the S480. MPI did this on their first kits (but because it was before the vanes were controllable). It helped with drive pressures in the trucks I have done my installs on, EGT's are lower (not that they were bad to begin with), and should make that little VVT happier in the long run. My opinion is that it's worth it. It is more cost, but the benefits are there. Another thing is it isn't any extra work to bolt the waste gate set-up in if you are already there installing the twins. It's not hard to "tune" the waste gate and dial it in.
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No, never did...I just know it works pretty well.
So do you modify the tuning to keep the vanes stationary and let the wastegate do all the work? Sorry, Im just not seeing it.
No. You still use the vanes to get the quick spool up, and have them there to do grade braking. The waste gate is there to help use the energy to spool the bigger turbo once your VVT can't keep up with efficient flow through the turbine housing ("excessive" and hot drive pressure).
You have to tune the waste gate for your liking.
I have mine referenced and controlled so that I can still have my crazy grade braking from the VVT for towing (higher drive pressure lower temp EGT, low boost), but it will still waste gate around the VVT when there's "excessive" hot drive pressure, cruising (sometimes steep grades I see it open depending on tuning), towing (grades), and accelerating. There's a few ways to do it (reference and controlling wise), and people definitely have different preferences in how it acts. Some don't like grade braking, some do, etc.
-Dave
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It would not be possible on a truck that currently has twins , it would require "some welding" to tie it into the exsisting hot pipe . But if you know some one to take care of that aspect we may be able to work something out .
not hard to do it , but to do it right and gate both sides IMOP is the only way it should be done . Most I have seen done are using the EGR port on the up-pipe and that is not the route i will be going .
Yeah I have seen the route used (MPI was doing that and seen others).
I as well went the route of gating both banks together. It's more work and money building a kit wise, but as stated, not much extra work added to the install on the trucks. It makes it a bit "cleaner" looking (compared to the EGR port option), better flow characteristics, and less likely for issues I think due to being simpler piping wise (compared to the EGR port option).
sorry to continue the hijack BUT what about what about single stock VVTs? what im getting at is there must be an optimum vane position for the very best DP/boost ratio. however that position may cause overboosting with additional fuel. using the wastegate would allow you to use whichever vane position proves most efficient at x level of boost and direct additional unneeded exhaust around.
started a thread about it a while ago but it didn't go very far as i didn't have the funds to test the theory
started a thread about it a while ago but it didn't go very far as i didn't have the funds to test the theory
The waste gate kit will be for both Beach , whether its needed as a sinle with stock fuel i dont know , but def useful with use of a little giggle gas
