More boost? - Page 2 - PeachParts Mercedes-Benz Forum

jake12tech · #16 06-28-2017, 12:15 AM

Quote:

Originally Posted by Bimmer-Bob

I'm tentatively planning to fit a new IP with 7.5mm elements (but nowhere near max fueling). I'm told that EGT will actually be lower than stock, because of an earlier, shorter, more efficient injection duration. I'm also reading that more boost can lower EGTs (relatively) if overfueling. I don't know, I'm hearing lots of differing opinions - if I follow through on this I'm planning to monitor EGTs just in case. Just trying to figure out a starting point for the wastegate.

Thanks, I'm over at STD, too. It's hard to get really good info over there sometimes, though, because my planned build is quite conservative compared to most.

I wanted to quote this cause I just noticed this. That's stupid whoever said you'll have lower EGTs with more fuel. You'll have lower EGTs with more boost and less fuel. Because you're increasing the air. Some of the guys on STD are real nimwits. Be careful who's advice you follow.

Put on an HX35 and a custom flange. You'll have the perfect turbo. They're good for 300hp if you wanted the option in the future. I think 6.0mm plungers, HX35 and an intercooler and you'll be at 250CHP which is all I'd do an on OM602. Don't forget a larger free-flowing exhaust as well.

R-3350 · #17 06-28-2017, 10:57 AM

i am running a 8mm pump on a 617 and there is a decrease in egt's for a given fueling. a 6mm pump putting out 90cc's vs a 8mm pump you will see a 1-200* drop in temps due to the faster injection and better atomization from the higher peak pressure. yes just more fuel will result in higher egt's but its not as bad with larger elements than you think.