Topgunz ROTREX C38R Supercharger Kit

HapaZ · 10-26-2021, 11:35 PM

Quote:

Originally Posted by redondoaveb

What octane do you have there? 650 on pump might be out of reach. I had 1050 injectors and a single walbro 450 running e85 and my injector duty cycle was at 125% at 650whp. I had to go with 1300cc's and twin pumps

What pumps did you go with? I'm considering a TI automotive brushless pump and wondering if one will do for around 650whp on e85.

redondoaveb · 10-27-2021, 12:29 AM

Quote:

Originally Posted by HapaZ

What pumps did you go with? I'm considering a TI automotive brushless pump and wondering if one will do for around 650whp on e85.

I kept my walbro 450 and added a 525 hellcat

HapaZ · 10-27-2021, 01:41 PM

Quote:

Originally Posted by redondoaveb

I kept my walbro 450 and added a 525 hellcat

Ah, so I'm guessing that one pump isn't going to cut the mustard for me.

Birdiev · 10-27-2021, 02:48 PM

Quote:

Originally Posted by HapaZ

Ah, so I'm guessing that one pump isn't going to cut the mustard for me.

Honestly I think it depends on your fuel set up as a whole. Seethroughead is wanted to get up to 650 on pump which the 1050cc should be enough as long as he has the rails to go with it. (Although 580 to 600 may be a better number).

redondoaveb ran out of duty cycle but keep in mind he was running on e85 so takes more volume/fuel to get the same numbers that's why he needed bigger injectors and pumps.

I hit 650 with rails and the hellcat pump running 1300cc injectors at under 80% cycle.

Keep in mind you are be going to want to move volume over pressure. I feel like you shouldn't want the pumps fighting each other. But again depends on your setup as a whole unit

HapaZ · 10-27-2021, 04:06 PM

Quote:

Originally Posted by Birdiev

Honestly I think it depends on your fuel set up as a whole. Seethroughead is wanted to get up to 650 on pump which the 1050cc should be enough as long as he has the rails to go with it. (Although 580 to 600 may be a better number).

redondoaveb ran out of duty cycle but keep in mind he was running on e85 so takes more volume/fuel to get the same numbers that's why he needed bigger injectors and pumps.

I hit 650 with rails and the hellcat pump running 1300cc injectors at under 80% cycle.

Keep in mind you are be going to want to move volume over pressure. I feel like you shouldn't want the pumps fighting each other. But again depends on your setup as a whole unit

Yeah fair points. I hadn't planned on changing the fuel rails, but I do have 1300cc injectors already so maybe I should reconsider. $1400 on fuel pumps alone seems pretty insane, but I know I gotta pay to play. I might run with 1 pump and see how far Eugene can take it and then decide down the line if I want bigger numbers.

Elmo370z · 10-27-2021, 10:43 PM

Quote:

Originally Posted by HapaZ

Yeah fair points. I hadn't planned on changing the fuel rails, but I do have 1300cc injectors already so maybe I should reconsider. $1400 on fuel pumps alone seems pretty insane, but I know I gotta pay to play. I might run with 1 pump and see how far Eugene can take it and then decide down the line if I want bigger numbers.

Just spend the money one and buy a brushless pump. 1 pump will take care of everything. You won’t make enough HP to out flow the brushless pump

TopgunZ · 10-28-2021, 02:09 PM

Quote:

Originally Posted by Elmo370z

Just spend the money one and buy a brushless pump. 1 pump will take care of everything. You won’t make enough HP to out flow the brushless pump

Honestly, I would go with a single 450 or 500 and just add the Boost-a-pump. No need to unnecessarily heat up your fuel unless those brushless pumps dont create as much heat. These things are pretty trick as they only kick in when they see 3psi of boost.

I bet a 450 with a KB-BAP would flow enough for 800+whp and cost $400. I think those brushless pumps are well over $1k.

We made 710whp on that setup with stock rails and fuel pressure didnt drop one bit.

redondoaveb · 10-27-2021, 03:29 PM

Quote:

Originally Posted by HapaZ

Ah, so I'm guessing that one pump isn't going to cut the mustard for me.

See Birdiev post

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Topgunz ROTREX C38R Supercharger Kit