Thread: NO lean Issues
View Single Post
Old Apr 18, 2010 | 10:22 PM
  #10 (permalink)  
BrianBrave's Avatar
BrianBrave
<--- Huge Horsepower
Joined: Apr 2007
Posts: 3,217
Likes: 2
From: So Cal
Default Re: NO lean Issues
Originally Posted by SRT6 Gang Member
Prior to LET creating the 181 and 185 pulleys, the largest pulley available was 178. IMO, the reason for this was because the 178 pulley was capable of producing the maximum amount of boost without having adverse affects on the factory fuel system and other variability’s.

SLK32Germany is correct the SL55 pump works around 19psi but not at 20+. Thanks for sharing SLK32Germany!
I've not seen an ASP 178mm pulley - but from what I've seen on the ASP website and what I've read on the forum; the 178 is only a "press-on" outer belt ring using the OEM hub. This would help eliminate alignment issues due to manufacturing tolerance problems. Plus - I bet you can access all the water pump bolts without removing the pulley. With the two piece 185MM design - you have to remove the outer hub when you remove the water pump. Not sure of the 181mm.

I'm guessing that's the main reason behind the ASP design - that and to ensure the OEM belt fits. (a big marketing strategy) Not over-boost issues if it only comes down to 1 PSI.

Regardless of what pulley you install - would you have lean issues if you didn't raise the RPM rev limiter when you tune?

Could you compensate for these lean issues with proper tuning techniques if you do raise the rev limiter? Is that something that's easy to do with a "mail-in" tune?

True data-logging at 180MPH can't be over looked

Just some random thoughts rolling around.....
 
Reply
0