Recommended Engine Mods to support Compound Boosting?
Hello guys. Owing to the great advice given in this thread re: A Turbo + supercharged Challenger I am even more enamored with the idea of incrementally making this happen :notallthere:. I realize there are some motor parts swaps that need to take place in order to support compound boosting a Challenger.
The plan is:
I realize that tuning isn't available for the 2011 yet. I think that's okay since this will be an incremental build - by the time it is I would have the resources to add a SC or Turbo.
My question for the gear heads is what specific modifications should I swap into the motor to support boosting between 14-20 psi?:scratchhead: Ideally I am looking for a list of parts/installs that I can take to a speed shop to help guarantee the HEMI can handle dual boosting in the future.
The plan is:
- buy a baseline '10/'11 R/T
- swap out motor for forged parts (up front cost with no performance gain, right?)
- (sometime in the future) adding supercharger
- (sometime in the future) adding twin turbo
I realize that tuning isn't available for the 2011 yet. I think that's okay since this will be an incremental build - by the time it is I would have the resources to add a SC or Turbo.
My question for the gear heads is what specific modifications should I swap into the motor to support boosting between 14-20 psi?:scratchhead: Ideally I am looking for a list of parts/installs that I can take to a speed shop to help guarantee the HEMI can handle dual boosting in the future.
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hm. maybe I am crazy! (quite possible! or delusional)
To answer your question "why" -
1.) The combination of a supercharged turbo intrigues me
2.) Seems like it would be possible to slowly build to it in financable chunks over a couple of years in the meantime driving to work, tuning for street use (8-10 psi?) while allowing for future cababilities of racing.
I am emailing a local speed shop and they are echoing the "you are crazy" vibe. I think such feedback is quite valuable actually! (and refreshing I guess)
/shrug
To answer your question "why" -
1.) The combination of a supercharged turbo intrigues me
2.) Seems like it would be possible to slowly build to it in financable chunks over a couple of years in the meantime driving to work, tuning for street use (8-10 psi?) while allowing for future cababilities of racing.
I am emailing a local speed shop and they are echoing the "you are crazy" vibe. I think such feedback is quite valuable actually! (and refreshing I guess)
/shrug
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Other than looking cool under the hood at a show, it's in my opinion a pointless endeavor. I can imagine it would be a tuning nightmare. And for only 15-20 PSI, really, what is the point? You can make that easy with twin turbo. PSI doesn't mean anything, anyway, you really need to be looking at how much power you want to make.
A build for this is going to require dropping the compression, and that's going to require tuning even if you don't throw boost on it right away. That leaves the 2011 cars out for you, for now.
I think you really need to assess your goals for the car. Throwing money at a concept just because intrigues you is probably going to cost you alot more than you need to spend.
A build for this is going to require dropping the compression, and that's going to require tuning even if you don't throw boost on it right away. That leaves the 2011 cars out for you, for now.
I think you really need to assess your goals for the car. Throwing money at a concept just because intrigues you is probably going to cost you alot more than you need to spend.
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I gave you some info in your other thread, I'll add a bit more here as well.
To build a forged motor designed for boost the compression will need to be lower than a standard NA motor. Factory R/T motors are 10.3:1 compression.
My forged motor was built with boost in mind and is 9:1 compression.
The lower compression robs some horse power so I went with a 6.0L stroke to make up for that so it was a wash. I got the best of both worlds...a motor that could take considerable boost, and a nice torquey engine out of boost.
You'll want to discuss your plans with the engine builder of your choice and design the motor around what you're wanting to do.
My guess is they'll suggest a 8.4 or maybe lower compression to run compound boost in the 20psi range.
It will be tough to make that up with any stroke, and may not be advisable due to the extra boost involved.
To build a forged motor designed for boost the compression will need to be lower than a standard NA motor. Factory R/T motors are 10.3:1 compression.
My forged motor was built with boost in mind and is 9:1 compression.
The lower compression robs some horse power so I went with a 6.0L stroke to make up for that so it was a wash. I got the best of both worlds...a motor that could take considerable boost, and a nice torquey engine out of boost.
You'll want to discuss your plans with the engine builder of your choice and design the motor around what you're wanting to do.
My guess is they'll suggest a 8.4 or maybe lower compression to run compound boost in the 20psi range.
It will be tough to make that up with any stroke, and may not be advisable due to the extra boost involved.
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Seems like pretty sound advice.
I do question the 12psi Magnuson Supercharged car ripping rear ends out of itself though.
Mine's on 12psi making 550RWHP. I drive it around town all the time, and while I do have to be cautious with the throttle I've not torn anything up what so ever in the past year I've had it setup this way.
I also installed DSS Level 5 axles and hit the drag strip Saturday. I ran a 12.03 at 118.26 with a 1.82 60'. I then put my street tires back on the car after running down the drag strip all day and drove the car back to the house an hour and a half away with no problems.
I'd question the driver of that purple car for the damage done as mine has not had a single problem and I'm even still on the stock clutch.
550RWHP is a bit much for the street in all honesty. I originally asked for 500RWPH and Arrington over delivered by a bit. Fine by me as I like the power, but it can break the tires loose at 70MPH in 3rd gear which has somewhat of a pucker factor.
I do question the 12psi Magnuson Supercharged car ripping rear ends out of itself though.
Mine's on 12psi making 550RWHP. I drive it around town all the time, and while I do have to be cautious with the throttle I've not torn anything up what so ever in the past year I've had it setup this way.
I also installed DSS Level 5 axles and hit the drag strip Saturday. I ran a 12.03 at 118.26 with a 1.82 60'. I then put my street tires back on the car after running down the drag strip all day and drove the car back to the house an hour and a half away with no problems.
I'd question the driver of that purple car for the damage done as mine has not had a single problem and I'm even still on the stock clutch.
550RWHP is a bit much for the street in all honesty. I originally asked for 500RWPH and Arrington over delivered by a bit. Fine by me as I like the power, but it can break the tires loose at 70MPH in 3rd gear which has somewhat of a pucker factor.
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