Unicorn II update....

NightHawk756 · 11-13-2006, 10:35 AM

Well, she's running.

Basic break-in tune, pretty conservative was 411hp/428tq at 9psi/pump gas.

Went back after break-in and made another baseline. It was 438/461 at 9psi/pump gas.

We started turning the boost up a little. At 12 psi, it went to 492/615-pump gas. But, we started getting pig rich up top and Blake was tuning less fuel in. We got an 18 psi spike and she blew a head gasket on #8.

I'm glad it blew actually. Come to find out, the exhaust valve guide on #5 was dumping oil in the cylinder. So, very possibly, I had a weak chamber on #5 as a result. So, at the moment, the heads are getting clened up and new valve guides installed.

Hopefully an increase in hp numbers will follow at the same boost levels once I'm not interupting the combustion process by dumping oil in #5.

I'll try and update again when she's back up. We plan to go much higher with the boost level

But, there's just so much that little 60-1 can do. It's falling off pretty good at the end.

Whenever I get my sick computer back, I'll post up dyno graphs.

11-13-2006, 10:35 AM	#1
NightHawk756 Si vis pacem, para bellum Join Date: Dec 2004 Location: Tick-Tock, Tick-Tock....... Posts: 5,146	Unicorn II update.... Well, she's running. Basic break-in tune, pretty conservative was 411hp/428tq at 9psi/pump gas. Went back after break-in and made another baseline. It was 438/461 at 9psi/pump gas. We started turning the boost up a little. At 12 psi, it went to 492/615-pump gas. But, we started getting pig rich up top and Blake was tuning less fuel in. We got an 18 psi spike and she blew a head gasket on #8. I'm glad it blew actually. Come to find out, the exhaust valve guide on #5 was dumping oil in the cylinder. So, very possibly, I had a weak chamber on #5 as a result. So, at the moment, the heads are getting clened up and new valve guides installed. Hopefully an increase in hp numbers will follow at the same boost levels once I'm not interupting the combustion process by dumping oil in #5. I'll try and update again when she's back up. We plan to go much higher with the boost level But, there's just so much that little 60-1 can do. It's falling off pretty good at the end. Whenever I get my sick computer back, I'll post up dyno graphs. __________________ 1989 Saleen SSC 1988 AL DPS SSP