Not really a good option unless you really want/need centered outlet.Thanks, now that does sound interesting! Even if I got 9 more people to do a group buy, it would still probably cost 1000. I have a centered outlet manifold design that I'm looking at making, but only because I need the turbo in that location. Depending on conversion rates ~$625 for a nice cast iron twin scroll T3 manifold is hard to beat. Though I haven't really looked very much. If you can do the fab work yourself, then then this is cheapest way to get a quick spooling 400hp.Īs far as OM606 exhaust manifolds, the Kangaroos Team manifold is the best option I've seen. The H1C might be a bit small, but you could try it and see. Just guesstimating I think the HE221 would max out around 350-400hp. So you could put an HE221 in there with your H1C. For 400HP I think you'd want a ~35lb/min high pressure turbo and ~65lb/min secondary turbo. Not really a good option unless you really want/need centered outlet. Less cost in terms of turbos, but does have the added complexity of the compound piping.Īs far as OM606 exhaust manifolds, the Kangaroos Team manifold is the best option I've seen.

In a compound setup I don't think it would hit 400hp, but I think 350hp would be possible.

The GTB2260s are relatively common and cheaper. A compound setup with a VNT could be really cool. A VNT does have the added benefit of being able to act as an exhaust brake, which saves you a good chunk of cash if you need an exhaust brake. The single big VNT is a more simple option in terms of physical components, but does cost more and requires an electronic controller. If you can do the fab work yourself, then then this is cheapest way to get a quick spooling 400hp. I did however think about moving the charge inlet to the front of the inlet manifold to shorten things further. The pipes are 65mm diameter and as direct as they can go. The intercooler I have is fairly large, it's a universal one but the biggest I could fit in the space behind the bumper.

If I did go with a more modern single turbo, what would be the best manifold to use? I quite like the idea of the cast iron ones made by Kangeroo team, but anything has to be better the the adapter on the stock 606 manifold I have now. I did briefly look at doing a compound setup, but thought that the smallish turbo I would need to use for the response I'm looking for would cause too much of a restriction for the larger one? I've got enough fuel in the pump for 500+hp, it's got 8mm elements fitted (there is a whole other back story behind that). Even with added piping, if the new intercooler reduces the charged air temp significantly, then it will improve spool.Thanks for the reply. Most people think that a larger intercooler will hurt turbo spool, but that is not the case unless you also add a bunch more piping. The super lightweight turbine wheel improves transient response, which would further help spool during driving.Īlso, an often overlooked part of spool is the intercooler. If you need 2.3bar all the way to 5000rpm then the 6758 would do the job. If you have the fuel to support +350hp, then an EFR 6258 will do the job with 1.7bar from 2500rpm to 5000rpm. How much fuel are you trying to burn? Upgrading to a more modern turbo would be my first thought for better spool. A compound turbo setup can work well, but still requires extra piping and controls. (09-30-2020, 04:48 PM)vica153 Wrote: The valves in a sequential turbo setup adds a lot of complexity that seems like more work than its worth.

Compound sequential turbo