Smooth dyno session today.....

4.10" bore non Siamese R3
4.125" Stroke offset ground K1 crank
6" CompStar 2.0" rods
Custom Diamonds -28CC dish, 11.1:1 compression
Moroso 8 Qt pan
SDSS Solid roller 272/276 @ .050" .729"/.729" 108 LSA+4
1.65:1 Jesels
Arrington heads, 2.15"/1.60" Ferrea's, ISKY 9985 tool rooms, Comp tool steel retainers. Flow ~360/260 @ .700"
Manton 3/8" .145" wall P rods
Arrington single 4 cast manifold converted to 4500 flange
Ran Quickfuel 1050 & a Pro Systems 1050 both virtually identical power.
Liked 33 degrees of timing (heads angle milled to 13 degree at some point in previous life)

Built as a pump gas street motor so no compression or wild cam. Motor turns over with 36.9 ft lbs of TQ ready to run with plugs in it, lashed etc.... Made real good TQ helped by smallish intake. I did'nt go wild on it to keep costs down. I was surprised by how good the TQ was, we pulled it down to 4100 late in day & it was making 540 @ 4100.... Made best of 610 TQ.

We ran it with my 1 7/8" into 2" Dyno headers with 3.5" collectors, & then put on a set of Box stock TTI W2 1 7/8" Headers with 3" collectors to see power difference.... here are the results. First #'s were with the stepped big tubes...