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My next steps are raptor turboShort headers Performance intercooler Next step are cams and tuning on stationary dyno at rs-tuning. Im wondering if raptor compressor is not to small in combination with cams...?
When I installed my cams, I had to up the amount of fuel I needed using the K29. The K29 isn't the limiting component. The intake ports are.
No worries about more fuel, RS-Tuning knows how to add. I started to wonder if the raptor's compressor will produce enough air when I am installing rom N / A cams, after all, with a longer opening times, the intake and exhaust valves will be open at once...so turbo have to blow a lot of air.
Excuse my ignorance but I have never heard of Raptor Exhaust for these cars. Just what I use on my Ford F-150 raptor. Is there a link? I can't find any info on it.
Borg warner makes some very nice components that you can mix and match for reasonable money. The only issue is cooling which you can do by oiling or water.
These are what we had made up for my TT project. Stainless & aluminum housings, Ti impeller blades, ball bearings, small compact size with quick spooling. We aren't using the built in BOV since I don't think it will handle the small amounts .5-.7 bar of boost they will be pushing and can pump out crazy pressures. Not very pricey either although I did get wholesale prices. I am installing speed sensors as well but now we are getting into stand alone. You can option them with T3/T4 flanges or band clamps which i prefer for custom work. easier to remove if needed.
You can mix and match parts to suit your desired results.
Excuse my ignorance but I have never heard of Raptor Exhaust for these cars.
Actually, it's a modification of a KKK K27-7200 or KKK K27/K29 hybrid turbo by Evergreen Turbo. It consists of a hot side impeller with an additional blade on it. It is said to provide more flow at low rpms.
It's 9 blade turbine instead of 12 blade turbine and oem size billet compressor. Both are designed now and not 35 years ago, both lighter. This modification is to cause the Turbo to wake up earlier and blow 10% more will test soon.I know that most modifies these turbochargers by installing a much larger compressor wheel, but I believe its point less with tje engine that has such a low compression ratio and such a large turbine wheel.
Usable rpm range will be even more limited.
It's 9 blade turbine instead of 12 blade turbine and oem size billet compressor. Both are designed now and not 35 years ago, both lighter. This modification is to cause the Turbo to wake up earlier and blow 10% more will test soon.I know that most modifies these turbochargers by installing a much larger compressor wheel, but I believe its point less with tje engine that has such a low compression ratio and such a large turbine wheel.
Usable rpm range will be even more limited.
When I talked to the owner of Evergreen on the phone, he stated there was an added turbine blade on the impeller he was selling, so I'm not sure what you are referring to. This lines up with the anecdotal evidence I've been hearing about Raptor. An extra blade would increase backpressure. Turbocharging is a series of tradeoffs. Go for fast spooling, increase backpressure. Decrease backpressure, get more lag. Having less impeller blades on the the turbine limits how hard you can drive the compressor.
Go back and read what I wrote about compressor choke point to understand a bigger compressor is helpful. If you really believe it's "pointless" to add a bigger compressor to a "low compression" engine, I can only conclude that you don't understand how supercharging works. After all, the whole point of supercharging is to be able to shove more air into the engine that what you'd get if you were relying on atmospheric pressure. Hopefully it's cool air, which is where the compressor choke point comes into play. The compression ratio that matters is the one you achieve at full boost; somewhere around 11:1 to 13:1. For example, the Indycar engines of the 80's to 90's had a static compression ratio of 8:1 so they could run 1.2 - 1.5 bar on boost. Yes, a low static compression engine will be a bit sluggish off boost but, once again, it's about the tradeoffs. Cams with more duration and a small amount of overlap help with atmospheric running.
When I talked to the owner of Evergreen on the phone, he stated there was an added turbine blade on the impeller he was selling, so I'm not sure what you are referring to. This lines up with the anecdotal evidence I've been hearing about Raptor. An extra blade would increase backpressure. Turbocharging is a series of tradeoffs. Go for fast spooling, increase backpressure. Decrease backpressure, get more lag. Having less impeller blades on the the turbine limits how hard you can drive the compressor.
Go back and read what I wrote about compressor choke point to understand a bigger compressor is helpful. If you really believe it's "pointless" to add a bigger compressor to a "low compression" engine, I can only conclude that you don't understand how supercharging works. After all, the whole point of supercharging is to be able to shove more air into the engine that what you'd get if you were relying on atmospheric pressure. Hopefully it's cool air, which is where the compressor choke point comes into play. The compression ratio that matters is the one you achieve at full boost; somewhere around 11:1 to 13:1. For example, the Indycar engines of the 80's to 90's had a static compression ratio of 8:1 so they could run 1.2 - 1.5 bar on boost. Yes, a low static compression engine will be a bit sluggish off boost but, once again, it's about the tradeoffs. Cams with more duration and a small amount of overlap help with atmospheric running.
What's actually happening is that the stock K27-7200 (if that's what you have) reaches it's choke point at around .9 bar. Any increase in compressor boost beyond the choke point almost doubles the temperature of the mass flow. End result is thermodynamic efficiency is gone and you're pumping a lot of hot air into the engine, which it doesn't like.
I'm running a K29 at .8 bar and it's good enough for me I can't fuel any more than that anyway with a stock fuel system. I'm maxed out but like I said, it's fast enough for me.
Btw 3.6 turbo is running 0.92 bar boost from the factory with same 7200 turbocharger...
01-12-2023 | 05:15 PM
I can't fuel any more than that anyway with a stock fuel system. I'm maxed out but like I said, it's fast enough for me.