# SC'd engine with smaller engine running the SC (hypothetical) **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [April 28, 2014, 5:11pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217 "2014-04-28T17:11:44Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![Darksyde](https://avatars.discourse-cdn.com/v4/letter/d/ed655f/32.png) [@Darksyde](https://forums.speedlife.net/u/Darksyde)\ **Post date:** [April 28, 2014, 5:11pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/1 "2014-04-28T17:11:44Z")
So a co-worker and I got into this conversation today about SC’d engines. His idea was to mount some sort of smaller engine to strictly run the SC thus eliminating he HP drain on the main engine itself from the SC. As we drew things up and tossed numbers at things I just couldnt find substantial gains to warrant something like this. He kept insisting it would be far superior. My argument is that the added weight of everything (engine,ecu,mounts,etc) would negate any gain incurred. I found a link with this same hypothetical and there is arguments for both sides. [http://www.ultimatecarpage.com/forum/showthread.php?t=42975](http://www.ultimatecarpage.com/forum/showthread.php?t=42975) I know there are some very auto intelligent minds on this forum, I was just curious as to your thoughts on this. ---
**Author:** ![Onyx\_Z32](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/onyx_z32/32/7581_2.png) [@Onyx\_Z32](https://forums.speedlife.net/u/Onyx_Z32)\ **Post date:** [April 28, 2014, 6:24pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/2 "2014-04-28T18:24:45Z")
Soooo… electric supercharger? 🙂 ![http://3.bp.blogspot.com/-u7gZFak9J5g/UEHiqo77UvI/AAAAAAAAAC0/5o3bO9qjx_o/s1600/electric+supercharger.jpg](http://3.bp.blogspot.com/-u7gZFak9J5g/UEHiqo77UvI/AAAAAAAAAC0/5o3bO9qjx_o/s1600/electric+supercharger.jpg) ---
**Author:** ![purestock240](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/purestock240/32/5729_2.png) [@purestock240](https://forums.speedlife.net/u/purestock240)\ **Post date:** [April 28, 2014, 6:34pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/3 "2014-04-28T18:34:25Z")
why not just have an engine thats a bit bigger, to accommodate the loss… ---
**Author:** ![Darksyde](https://avatars.discourse-cdn.com/v4/letter/d/ed655f/32.png) [@Darksyde](https://forums.speedlife.net/u/Darksyde)\ **Post date:** [April 28, 2014, 6:35pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/4 "2014-04-28T18:35:41Z")
That was brought up as well. If it were to be a viable option i’d go with something like this [http://www.turbomagazine.com/tech/0406tur\_knight\_turbo\_electric\_supercharger/](http://www.turbomagazine.com/tech/0406tur_knight_turbo_electric_supercharger/) But his idea was more of a small engine even a 2 stroke or small high revving bike engine, connected by belt to the SC in the engine compartment…somewhere. ---
**Author:** ![Onyx\_Z32](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/onyx_z32/32/7581_2.png) [@Onyx\_Z32](https://forums.speedlife.net/u/Onyx_Z32)\ **Post date:** [April 28, 2014, 6:41pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/5 "2014-04-28T18:41:56Z")
He seriously wants 2 gas powered engines, one just to run the supercharger? ![http://weknowmemes.com/wp-content/uploads/2011/09/epic-jackie-chan-template.png](http://weknowmemes.com/wp-content/uploads/2011/09/epic-jackie-chan-template.png) ---
**Author:** ![Darksyde](https://avatars.discourse-cdn.com/v4/letter/d/ed655f/32.png) [@Darksyde](https://forums.speedlife.net/u/Darksyde)\ **Post date:** [April 28, 2014, 6:44pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/6 "2014-04-28T18:44:35Z")
This is not something that will ever happen. Just 2 guys after a long day of work with a dry erase board and silly thoughts. But yes that is essentially what his idea was. That look is damn close to my look during this whole conversation we had earlier lol ---
**Author:** ![Onyx\_Z32](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/onyx_z32/32/7581_2.png) [@Onyx\_Z32](https://forums.speedlife.net/u/Onyx_Z32)\ **Post date:** [April 28, 2014, 6:45pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/7 "2014-04-28T18:45:08Z")
Poll added ---
**Author:** ![Darksyde](https://avatars.discourse-cdn.com/v4/letter/d/ed655f/32.png) [@Darksyde](https://forums.speedlife.net/u/Darksyde)\ **Post date:** [April 28, 2014, 6:48pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/8 "2014-04-28T18:48:49Z")
lol nice, he kept reverting back to if a normal SC’d engine makes XXXhp at say 4000rpm, then why wouldnt a smaller higher revving engine meant to run just the SC at say 8000rpm’s while the main engine is still at 4000rpm create that much more power. Now obviously if this was even in the realm of possibility, it would need a serious ECU to run and control 2 engines at varying rpm’s simultaneously all while adjusting fuel and what not. Which again was my argument that it is just way too much work for something that could be achieved in numerous other ways. ---
**Author:** ![jay\_g](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jay_g/32/111288_2.png) [@jay\_g](https://forums.speedlife.net/u/jay_g)\ **Post date:** [April 29, 2014, 5:59am UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/9 "2014-04-29T05:59:05Z")
Just do this. [https://youtu.be/U81\_0waqEWA](https://youtu.be/U81_0waqEWA) ---
**Author:** ![Onyx\_Z32](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/onyx_z32/32/7581_2.png) [@Onyx\_Z32](https://forums.speedlife.net/u/Onyx_Z32)\ **Post date:** [April 29, 2014, 7:07am UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/10 "2014-04-29T07:07:04Z")
lol, interesting but definitely silly. ---
**Author:** ![theblue](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/theblue/32/5074_2.png) [@theblue](https://forums.speedlife.net/u/theblue)\ **Post date:** [April 29, 2014, 12:41pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/11 "2014-04-29T12:41:12Z")
I think that spinning up via a battery system would always make more sense. ---
**Author:** ![JayS](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jays/32/15375_2.png) [@JayS](https://forums.speedlife.net/u/JayS)\ **Post date:** [April 29, 2014, 12:52pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/12 "2014-04-29T12:52:09Z")
So far the pole results have restored my faith in NYSpeed. Just a tiny bit but it helps. ---
**Author:** ![purestock240](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/purestock240/32/5729_2.png) [@purestock240](https://forums.speedlife.net/u/purestock240)\ **Post date:** [April 29, 2014, 1:09pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/13 "2014-04-29T13:09:09Z")
[http://www.hotrod.com/techarticles/hrdp\_1304\_procharger\_i\_1\_variable\_ratio\_supercharger/](http://www.hotrod.com/techarticles/hrdp_1304_procharger_i_1_variable_ratio_supercharger/) ---
**Author:** ![fairgentleman\_Z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fairgentleman_z/32/7263_2.png) [@fairgentleman\_Z](https://forums.speedlife.net/u/fairgentleman_Z)\ **Post date:** [April 29, 2014, 1:11pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/14 "2014-04-29T13:11:05Z")
Just use the 2013 GT500 as a case study: [http://www.caranddriver.com/reviews/2013-ford-mustang-shelby-gt500-test-review](http://www.caranddriver.com/reviews/2013-ford-mustang-shelby-gt500-test-review) > The Eaton supercharger in the engine’s valley displaces 2.3 liters, spins faster than the last GT500’s blower, cranks out 14.0 psi at maximum boost (up from 9.0), **and takes more horsepower to operate than is produced by the current Ford Fiesta.** Let’s just assume same, because there are other options that would satisfy more. Case 1 Stock 2013 GT500: 662 HP 3891 lb **5.88 lbs/hp** Case 2 2013 GT500 with Fiesta motor to power SC. 782 HP (gains 120 hp for no longer having parasitic loss) 4191 lb (gains estimated 300 lbs from Fiesta engine) **5.36 lbs/hp** Case 2 wins for lbs per horsepower. Now for that turning, stopping, logistical packaging stuff… who cares? If they can do a twin engine; one auto, one manual dual ECU LeMons car you should be able to install an engine not attached to a driveline with no problem. Worst case to come out even 5.88 lb/hp the Fiesta engine and packaging could weigh up to 707 lbs. ---
**Author:** ![maxwell](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/maxwell/32/6524_2.png) [@maxwell](https://forums.speedlife.net/u/maxwell)\ **Post date:** [April 29, 2014, 1:35pm UTC](https://forums.speedlife.net/t/scd-engine-with-smaller-engine-running-the-sc-hypothetical/269217/15 "2014-04-29T13:35:34Z")
I was going to vote ‘yeah, that makes a lot of sense,’ but only because I was reading it with the sarcasm font in my head.