Stock turbos for cheap parallel setup?
Stock turbos for cheap parallel setup?
07-05-2020, 04:54 PM
#4
(07-02-2020, 08:57 PM)TwoMuchBoost Oh man... twin K14's would spool so slow and smokey; and that would be more work than I think you're estimating... two downpipes, two air intake/inlets + filters, two chargepipes + merge before intercooler, two wastegate brackets + diaphragm, twice as many opportunities for failures and boost leaks. That's assuming there's even room for all that, I'm trying to imagine two downpipes in that space and it's not computing lol. Yes, with two you get twice the airflow capability but it'll spool painfully slow as they're old turbo's with old technology. Simply put, there's a single turbo you can grab that will spool faster and probably make more power at the same time. My BorgWarner S251-SX was under $500 and is somewhat comparable power potential wise (400whp) and would definitely spool faster; I'm not utilizing the twin scroll housing it's got either so I expect that to improve further once I build a manifold. Then you have the billet S257 which isn't much more and flows 65lb/min... good for 500 to the tire with enough fuel.
As far as compounds go, you're right in that they're not suited at all unless you mean just one of the turbos on the manifold and purchasing a larger one to go over-top of it. But not both the K14's. Larger/low-press turbo should be roughly twice the size the small/manifold charger.
It's a really popular setup for the Cummins guys to put an S475 overtop the stock charger as a budget setup and it works well. Sizing that 1:2 ratio compressor wise to suit the stock K14 would put you at like an S362 or S366 but with a nice big hotside. If you could somehow fit a bigger turbine wheel into the stock K14 and port out the wastegate hole a little bit... I think that would be a slick setup for of 500-600 HP with stock-like spool.
I would have thought any s400 blowing into the stock HX35/HE351 would be way too big... same as using an s300 into a stock K14.
(fun fact the K14 was also a stock turbo option for a Peugeot XUD9TE 1.9litre turbo diesel... so yeah K14 for a 605/606 is way too small)
JarrusJenkins
07-05-2020, 04:54 PM #4(07-02-2020, 08:57 PM)TwoMuchBoost Oh man... twin K14's would spool so slow and smokey; and that would be more work than I think you're estimating... two downpipes, two air intake/inlets + filters, two chargepipes + merge before intercooler, two wastegate brackets + diaphragm, twice as many opportunities for failures and boost leaks. That's assuming there's even room for all that, I'm trying to imagine two downpipes in that space and it's not computing lol. Yes, with two you get twice the airflow capability but it'll spool painfully slow as they're old turbo's with old technology. Simply put, there's a single turbo you can grab that will spool faster and probably make more power at the same time. My BorgWarner S251-SX was under $500 and is somewhat comparable power potential wise (400whp) and would definitely spool faster; I'm not utilizing the twin scroll housing it's got either so I expect that to improve further once I build a manifold. Then you have the billet S257 which isn't much more and flows 65lb/min... good for 500 to the tire with enough fuel.
As far as compounds go, you're right in that they're not suited at all unless you mean just one of the turbos on the manifold and purchasing a larger one to go over-top of it. But not both the K14's. Larger/low-press turbo should be roughly twice the size the small/manifold charger.
It's a really popular setup for the Cummins guys to put an S475 overtop the stock charger as a budget setup and it works well. Sizing that 1:2 ratio compressor wise to suit the stock K14 would put you at like an S362 or S366 but with a nice big hotside. If you could somehow fit a bigger turbine wheel into the stock K14 and port out the wastegate hole a little bit... I think that would be a slick setup for of 500-600 HP with stock-like spool.
I would have thought any s400 blowing into the stock HX35/HE351 would be way too big... same as using an s300 into a stock K14.
(fun fact the K14 was also a stock turbo option for a Peugeot XUD9TE 1.9litre turbo diesel... so yeah K14 for a 605/606 is way too small)
Messages In This Thread
Stock turbos for cheap parallel setup? - by moroza - 07-01-2020, 04:22 PM
RE: Stock turbos for cheap parallel setup? - by barrote - 07-02-2020, 04:02 AM
RE: Stock turbos for cheap parallel setup? - by TwoMuchBoost - 07-02-2020, 08:57 PM
RE: Stock turbos for cheap parallel setup? - by JarrusJenkins - 07-05-2020, 04:54 PM
RE: Stock turbos for cheap parallel setup? - by TwoMuchBoost - 07-06-2020, 11:19 AM
RE: Stock turbos for cheap parallel setup? - by Petar - 07-06-2020, 09:16 PM
RE: Stock turbos for cheap parallel setup? - by moroza - 07-06-2020, 09:37 PM
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