ejm211
Automotive
- Dec 20, 2006
- 6
I love this forum! I get lost in here on my lunch breaks, what an informative source.
I have an interesting question that I've searched on but have been unable to find a conclusion.
I'm currently working on a supercharged MB engine with the drive pulley in the front and the throttle body in the rear. The issue is that due to space, the stock system utilizes a very small throttle body (74mm) and a y-pipe splitting to dual intakes.
Engine overall
Hard to see but at the rear of the blower sits the drive by wire throttle body and the y-pipe.
Now, an 82mm throttle body is available through MB and is a bolt on affair, with results in the 35-40whp range. Obviously 40whp out of a throttle body proves the stock unit is severely under sized. There have been a couple people to fit a 90mm BBK DBW throttle body (with an additional 35-40whp increase!), but it's a very tight fit.
Here's is where the issue lies. I'd like to see if I can run a 95mm or even a 102mm DBW throttle body but the space is simply not there behind the blower. Should I settle for the 90mm or can I build an extension and bring the throttle body away from the blower inlet?
Below is similar to the stock configuration, albeit with a much shorter snout (pay attention to the inlet only)
Current inlet design
While this is what I had in mind (similar blower as above but a different end casting style)
Revised inlet design
Relocating the throttle body to the passenger side of the blower would give me enough room to run the larger throttle bodies but at what expense? What will this increase of air volume post throttle body do to the power curve? I actually expect this to be easier to tune since the air would be less volatile when moving through the throttle body.
Any insight? Any input is greatly appreciated
I have an interesting question that I've searched on but have been unable to find a conclusion.
I'm currently working on a supercharged MB engine with the drive pulley in the front and the throttle body in the rear. The issue is that due to space, the stock system utilizes a very small throttle body (74mm) and a y-pipe splitting to dual intakes.
Engine overall
Hard to see but at the rear of the blower sits the drive by wire throttle body and the y-pipe.
Now, an 82mm throttle body is available through MB and is a bolt on affair, with results in the 35-40whp range. Obviously 40whp out of a throttle body proves the stock unit is severely under sized. There have been a couple people to fit a 90mm BBK DBW throttle body (with an additional 35-40whp increase!), but it's a very tight fit.
Here's is where the issue lies. I'd like to see if I can run a 95mm or even a 102mm DBW throttle body but the space is simply not there behind the blower. Should I settle for the 90mm or can I build an extension and bring the throttle body away from the blower inlet?
Below is similar to the stock configuration, albeit with a much shorter snout (pay attention to the inlet only)
Current inlet design
While this is what I had in mind (similar blower as above but a different end casting style)
Revised inlet design
Relocating the throttle body to the passenger side of the blower would give me enough room to run the larger throttle bodies but at what expense? What will this increase of air volume post throttle body do to the power curve? I actually expect this to be easier to tune since the air would be less volatile when moving through the throttle body.
Any insight? Any input is greatly appreciated