572's with inter cooled 14-71's

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10-30-2016 | 08:02 PM

#11

getrdunn

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From: NW Michigan

Disregard above post. Got sidetracked while writing and you had alrady answered pretty much what I was asking.

10-30-2016 | 08:07 PM

#12

rob vanharten

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From: Cedar Springs MI

What's a good ignition setup? Going to be changing this as well.

10-30-2016 | 08:46 PM

#13

hogie roll

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From: St. Pete Beach, FL

Turn it up until you see the IATs come up. Then back it down. If you're doing it on the Dyno put race gas in it while experimenting.

A lot of the extra power over your old combo will come if you spin it faster.

10-30-2016 | 08:54 PM

#14

sutphen 30

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From: taxachusetts

Quote:

Originally Posted by rob vanharten

What's a good ignition setup? Going to be changing this as well.

Daytona boxes,,just google them.

10-30-2016 | 09:05 PM

#15

MILD THUNDER

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From: chicago

Quote:

Originally Posted by getrdunn

MT what your static cr? Seems like you were running 7-8 pds boost. Also what's opinions on intercooler chillers if your not running long distant wfo runs. Majority cruising etc and under 3k. Thought you did some air temp testing with/without.

Mine currently is 8:1. Currently, I am at 9.5lbs of boost. Intercooled.

As far as the intercooled, vs not intercooled, I have not seen either setup, elevate the temperatures on long runs vs short runs. In my combination, the intercooler seems to reduce the air intake temps, around 25-35 degrees vs not having it.

A 10-71 right around 1:1 ratio, is making 135-140* intake temps. Believe it or not, the intake temps actually cool down when you open the throttles all the way up, vs cruising. Partly I believe because of the added fuel, and partly because, you are simply passing more fresh air thru the blower/intake/engine. The temp seems to rise AFTER a hard run, and you come off plane and idle, it get a little hotter there.

10-30-2016 | 09:06 PM

#16

14 apache

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From: Northport N.Y.

Quote:

Originally Posted by rob vanharten

So I picked up some 14-71's with blowers shop inter coolers. How much boost will I make before detonating a 9.6 static with a 254 264 @50 .632 lift 112ls cam ( basically a crane 691). Not looking to make 1200 hp here, just looking for 800-850 hp. Motors make 650 in there NA state. Leaving compression and quench we're it is after talking with several local builders. Being told I can make some decent power with my current compression and turning the big blowers slow and intercooling. Thoughts???

Have cometic make some head gaskets to drop compression ratio. May need pushrods and thicker intake gaskets after but you will have a safer set up.

10-30-2016 | 09:11 PM

#17

MILD THUNDER

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From: chicago

Quote:

Originally Posted by 14 apache

Have cometic make some head gaskets to drop compression ratio. May need pushrods and thicker intake gaskets after but you will have a safer set up.

I agree, or yank the heads, and if stock, have a good cylinder head guy, port the chambers, and make sure they line up to the bore size. You'll lose some compression, and unshroud the valves/help airflow as well. Im sure a 4.600 bore can accomodate.

What heads are they rob?

10-30-2016 | 09:20 PM

#18

14 apache

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From: Northport N.Y.

How much will a intercooler lower the boost?
At 25f-35f degrees lower?
How about more like 50-60f lower what does the boost do than?

Last edited by 14 apache; 10-30-2016 at 09:26 PM.

10-30-2016 | 09:34 PM

#19

rob vanharten

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From: Cedar Springs MI

They are the edelbrock 118cc heads made for gm's zz572 crate motor. I want to run a thicker cometic head gasket but I keep reading about quench and how I might actually make detonation worse by opening up the quench. I am going to see if Valeko can port the chambers and lose a few cc's while he is installing the inconel valves.