cigrocket

If you step up to a 6-71, 8-71 or a 10-71 and only plan on 3-5 lbs of boost, no need to run an intercooler.

I had a set of Chiefs built by Tommy years ago and they were 502's with 6-71s no coolers and they made 700 on the dyno and I ran them for 300 trouble free hours before I changed power

getrdunn

I would think to achieve 3.5 pds of boost in a 540 ci engine with a 250 blower you’d have to spin it much faster. Which in a sense would create more heat than that of the same in a 454. Yes no maybe???

snapmorgan

I modified a 250 chiller to fit a 420 pretty easily, just had to drill and tap a couple of holes. If you can find one for a 420 it should work with a little modification

SB

Good info ^^^^

i noticed same info searching earlier here:
https://www.cpperformance.com/p-8018...tercooler.aspx

Griff

I really don't see the need for a chiller when you are only running 3.5# of boost.
The blower is not spinning that fast even on a 540ci. The stock 502ci/575Sci runs 4# of boost.

getrdunn

What would one expect power wise out of a mild comp 540 w/3.5 pds - Just curious. 65 hp? Sounds like what OT is looking for.

Griff

I would guess closer to 100hp or more.
A 575SCi is just a 502 with 7.5 compression and a 240 duration ,560 lift flat tappet cam. Without the 4# of boost, it prob would not make more than 450hp

kjm5125

I had the 256 with Whipple chillers. Engine rebuilt with 871’s and no chillers. That in my opinion is the way to go.

getrdunn

Sounds like a good way to go!!! 👍👍👍

253checkmate

Whipple used to sell an intercooler for TBS 250. I looked into it a few years ago for my setup. It wasn't cheap though. I think it was in the 3k range?