360hp guesses

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PRH

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I don’t often bother with threads like this, since there are so many variables........ but what the heck.

Rebuilt, new 360 short block brought in.
Oe type pistons way down the hole.
It showed up with some HD “truck” type 318 heads(the ones with the water crossover instead of exhaust crossover, and they use 18mm spark plugs).
Heads were actually already installed on the motor, but the 18mm plugs were a red flag.
After researching the head casting numbers and seeing what they were, we talked them into using something more performance oriented, so they bought some Speedmaster heads.
Heads were checked out for seat run out, guide clearance, spring load, surface flatness...... all good.
8:1-ish CR
Comp XE268 cam
PRW rockers
STD Performer intake
Eddy 750
1-5/8 - 1-7/8 x 3 headers

It’s on the dyno now...........Guesses?
 
Last edited:
337.2hp, 384.3 ft/lbs :p

Numbers straight out of my ................
 
I haven’t rec’d the final numbers yet(I’m not running it)........ but I will say there are a couple of close guesses for the numbers I have seen so far.

I may not get the final word til tomorrow.
 
I think the high-efficiency heads will trump the low compression issue
 
I will take a guess , 345 hp , 380 tq , low comp. and alum heads dont help comp. although the heads are good for a street build.
 
I would say rumble got it, if the tittle says 360hp
LOL! Well, that’s not why I typed that in but it’s just a guess. Not knowing how efficient the heads are but guesstimate there about like an Edelbrock, I went conservative it it could go to 375hp. But I really don’t know.

I’d like to dyno my last mill. It is similar with a set of CNC ‘d ProMaxx heads and a Stealth intake & a Comp Hyd. roller. Same carb and headers. But at nearly 11-1.

I’m not looking for a guess at all. Just saying I’d like to dyno it. It’s a drivers mill.

We will keep the guessing to the first post.
 
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