Installing a 90's Katana head on a GS1100

[RacingJake]

I was thinking of putting the bars back on and see what happens.

Maybe with the 14/46 gearing of last year maybe it wasn't really pulling on the tire, but since it's at 14/42 now maybe the motor is showing it's stuff.

Could there be that much less drag with a 530 chain???? I know it drop 2 pounds of rotating weight

It's either the track or the tire?? .... gotta love test and tune

 

[RacingJake]

Finally got around to degreeing the Katana cams. With the notches lined up the intake was a 105 but the exhaust was 95??? So I advanced the exhaust cam until I got it to 105. So now that the track is in better shape and the cams are both at 105 will see how it goes soon.

Last time out I was at 7.12 and 102 mph in the 1/8

 

[rapidray]

Hey Jake, where do you want the power to be in the RPM? Having the cams at 105 will be a LOT of bottom end & make it harder to launch without bars. I would try them at 108 & 110. Ray.

 

[RacingJake]

I would like 110 on both, but since these are the small katana cams I think I'll just leave them there at 105 until i get some 350 cams. Right now my cranking compression is around 275 and I'm using VP MS109 so I'm itiching to get back to the track soon and see the results.

Also by next month I'm going to pull the head and take a look at the pistons and head chambers just to make sure nothing is going on in there.

 

[rapidray]

Jake, are you going to try the 88 GSXR 750 cams or buy something else? Let me know because I have both & I also sell Cam Motion cams & the G4s would work GREAT in your motor! Ray.

 

[RacingJake]

I like the G4's and it did run good in the 1100 and 1150 head but since there's not much meat around the cam bolt hole's ???? It did break on me and bent a few of my newly installed SS intake valve's when pieces of it fell into the path of the crankshaft sprocket. I think i'll try the 88J cams and they have alot more material around the bolt hole.

I see that Ron Ayers sells them for around 145 a piece.

 

[RacingJake]

It's been a while so here the lastest update.

The oil rings that are on studs 1 & 3 that keeps the oil from leaking out of the bottom of the head are still working great.

Still haven't put a top end oiler on it yet cause I'm still using 1100 studs on the ends that are thinner. Pulled the cam caps off and they look great.

Got 73 1/8 mile runs with no problems related to the 750 head. I'm going to pull the head this winter and see what the tops of the 13-1 pistons look like. I think the head will last along time since I'm shifting at 10K and redline for this head is 12.5K.

Best time with bars are 60ft 1.40, 330ft 4.00, 1/8 ET 6.26 and 108 mph with Katana cams. Gearing is 14/45.

I just installed some 340/320 cams and got them at 111/110 degrees. I couldn't advance the intake any more cause my clearance is .055 on the intake. Exhaust is better cause I got over .100, I could go more but I like to keep the cams the same. Will see at the track if it improves.

With alittle more tuning maybe I can get it closer to 6.0051 \\/

All in all with the 1166 kit it's faster than it's ever been. Still got the MTC 1395 block sitting on the shelf waiting for that special day

 

[RacingJake]

I changed back to the 630 chain and sprocket's 14 front and 46 rear due to the 530 was starting to get alittle long.

Anyhow best package so far is 60-1.41, 330-3.94, 1/8-6.11, mph-112.81

Looks like the 340/320 cams were good for 3 more mph and drop close to 2 tenth's

The head is up to 93 runs with no issue's so far. I'm not going to change anything more and just keep running it as is. I'm hoping with the cooler weather coming it should pick up alittle more speed.