M8 big bore kit w/ PGT

[Dogmeat]

I'm sort of pondering a notion here ...

I'm thinking about doing a CPC 950 big bore kit with the compression insert to keep the 12.7 stock ratio (same as on the 2010+ 800 motors).

Ideally, I'd be using the BB to make up for lack of power on the bottom end and then whatever gains I'd get on the top end would be offset by actually running less boost than you would on the stock PGT turbo set up .... so say, if I upgrade to a 950 bb kit .... then back off to say 7 psi (I'm typically at 8.5 now on a 2860R turbo) ... I could theoretically run the same octane fuel, run less boost, and have better throttle response on the low end ...

Then if I want to kick the boost up later just clutch for whatever power output I want and adjust fuel mix accordingly ..

Just sort of curious what others have built in the past and how well it worked.

 

[Tonysnoo]

Ive been intrigued with a TM8 -925 big bore....... generally I love big bores!

However the ones, ive been around dont seem to have any better response on the bottom than a well tuned stocker. Pipes, wye pipes, porting, turbo config......not sure why they havent worked that well.

It would be really cool to see what other have come up with to get the grunt!