my406cid

Good evening. Had my 87 buick regal with a l92 headed lq9 dynoed yesterday. Made 393 rwhp and 387 rwt. On the sec run it spiked to about 412rwhp. According to my time slip of 12.40 at 113 and a weight of about 3800 it makin about 430 to the tire. Here is the combo; lq9 l92 heads milled to 66cc with .040 gasket comp 11.2 pat g 224/232 .630 .604. Tooly .660 springs with titanium retainers. L92 intake,ported throttle body,1 7/8 long tubes 3.5 collector to 3" to rear tire exit. 4" cold air intake to area behind healights. Good numbers,bad, right on ect...

HCI2000SS

iTrader: (2)

Not bad, but dyno numbers are just that...the 113 trap speed says more

1970camaroRS

iTrader: (8)

Track numbers support 390rwhp on a dynojet. Numbers seem a little bit low though. Maybe its just the small cam and stock intake manifold.

my406cid

I thought a lil low also. Would a ported manifold help much?plus the power peale is low like 5600rpm. For got to add the cam is a 115 +3

rpturbo

iTrader: (47)

Did you degree in the cam? Maybe it's off/ground wrong.

Darth_V8r

iTrader: (4)

Peak power at 5600 on that set up sounds almost like valve timing is ten degrees advanced. Torque should generally peak at 4800-5100 and power at 6000-6800 on a LS barring anything really unusual.

My first HC peaked at 5500. Sure enough cam was ground nine degrees advanced. I didn't degree the cam. Just installed and let her rip. Swapped cams, peak at 6500.

KW Baraka

iTrader: (7)

What's the compression ratio?

Seems to me that the cam is a bit mild......it has about 1* (or so) of overlap. It doesn't have the 'legs' to do much more than it's doing.

KW

my406cid

Compression ratio is 11.2 and has -2 overlap. I hope this inage loads. Its the dyno sheet.