Oilcooled camshafts specs

[captain chaos]

Macmcmacmac posted this in oilcooled, usefull info.

From the GSX1100 (Oil Cooled 1100 Katana) service manual:

Cam height STANDARD LIMIT


IN:33.878 ­ 33.918 ( 1.3338-1.3354 ) 33.580 ( 1.3220 )

EX:33.533 ­ 33.573 ( 1.3202-1.3218) 33.240 ( 1.3087 )

Considering the "G" exhaust cam is so close, maybe it's a GSX1100 exhaust cam. It would not be stamped "B" because it's not a slingshot item.


From the GSXR750 Service Manual:

1988 Model Year:

IN: 33.878-33.918 (1.3328-1.3353) 33.580(1.3220)

EX: 33.533-33.573 (1.3202-1.3218) 33.240 (1.3087)




1989 Model Year: GSX-R750K

IN: 33.878-33.918 (1.3328-1.3353) 33.580 (1.3220)

EX: 33.604-33.664 (1.3230-1.3254) 33.310 (1.3114)


1989 Model Year: GSX-R750-RK Special edition, only 500 bikes made, longer stroke

IN: 33.876-33.976 (1.3337-1.3361) 33.580 (1.3220)

EX: 33.589-33.649 (1.3224-1.3248) 33.290 (1.3106)


1990 Model Year: GSX-R750L

IN: 33.876-33.936 (1.3337-1.3361) 33.580 (1.3220)

EX: 32.872-32.932 (1.2942-1.2965) 32.580 (1.2827)


1989-1990 GSXR-1100 cams measure the same as the 1988 750 cams according to the service manual.

So it looks like cams from the 88-89 750, 89-90 1100 and the GSX1100 are all the same (for height if not timing or duration). At least the "B" marking lets you know what it is right off. No idea what letters might be on the other camshafts.

GSX1100G

IN:33.592-33.648 (1.3225-1.3247) 33.300 (1.3110)

EX:33.422-33.478 (1.3158-1.3180) 33.130 (1.3043)



According to the Haynes manual I downloaded, the intake cams stamped "N" seem to be within the limits for a 1200 Bandit.

IN: 33.58 - 33.62 33.28

Bandit 1200 GSF1200T/ST to Y/SY:

EX: 33.41 - 33.45 33.11

Bandit 12000 GSF1200K1/SK1 Onwards:

EX: 32.65-32.69 32.35


The "S" exhaust dimensions fall within the limits for a GSX750 Katana (Teapot)


Standard
IN:

1989 through 1995 33.594 to 33.634 mm (1.3226 to 1.3242 inch)
1996 33.600 to 33.644 mm (1.3228 to 1.3246 in)ch
Minimum 33.300 mm (1.3110 inch)


EX:
1989 through 1995 32.882 to 32.922 mm (1.2946 to 1.2961 inch)
1996 32.890 to 32.934 mm (1.2949 to 1.2966 inch)
Minimum 32.590 mm (1.2831 inch)


GSX600F Katana (Teapot)

Lobe height (intake)

Standard
1988 and 1989
US 33.617 to 33.657 mm (1.3235 to 1.3251 inch)
UK 33.563 to 33.583 mm (1.3214 to 1.3222 inch)

1990 and 1991
US 33.617 to 33.657 mm (1.3235 to 1.3251 inch)
UK 33.900 to 33.960 mm (1.3346 to 1.3370 inch)

1992 on
US 33.632 to 33.688 mm (1.3241 to 1.3263 inch)
UK 33.922 to 33.978 mm (1.3355 to 1.3377 inch)

Minimum

1988 and 1989
US 33.320 mm (1.3118 inch)
UK 33.270 mm (1.3098 inch)

1990 and 1991
US 33.320 mm (1.3118 inch)
UK 33.600 mm (1.3228 inch)

1992 on
US 33.330 mm (1.3122 inch)
UK 33.620 mm (1.3236 inch)

Lobe height (exhaust)

Standard

1988 and 1989

US 32.882 to 32.922 mm (1.2946 to 1.2961 inch)
UK 33.146 to 33.186 mm (1.3050 to 1.3065 inch)

1990 through 1991 32.882 to 32.922 mm (1.2946 to 1.2961 inch)

1992 on 32.902 to 32.958 mm (1.2954 to 1.2976 inch)

Minimum

1988 and 1989
US 32.590 mm (1.2831 inch)
UK 32.850 mm (1.2933 inch)

1990 and 1991 32.590 mm (1.2831 inch)

1992 on 32.600 mm (1.2835 inch)

[zookrick]

Interesting, I have been looking at US online fiche and the KAT 1100 and 88/89 gsxr750 share the same part number as far as I could tell.
The difference in cam height from the teapot 750 and Kat 1100 cams is .427 mm or .017"
How much of a difference is it going to make in power? Is it worth it?

[zookrick]

Just some helpful info:
I have a set of GSXF 1100F cams here and the letters on them are:
intake: F and a G
ex: has a H and a K
Lobe height on these used cams is:
intake: 33.78 mm
exhaust: 33.4 mm

[zookrick]

I measured cam specs with a degree wheel when doing a cam swap:
These are the numbers for the kat 750:
intake 223 degrees @ 0.050" lift and 0.319" lift at the valve
exhaust 230 degrees @ 0.050" lift and 0.312" lift at the valve
These are the numbers of the '88 Gsxr 750 cams as I found on the internet:
intake 244 degrees @ 0.050" lift and 0.355 lift
exhaust 238 degrees @ 0.050" lift and 0.334 lift
For the Kat 1100 cams this is what I found:
Duration was 236 degree @ 0.050"
and 0.340 lift on the Kat 1100 cams.
versus the 223 duration and .319 lift for my old 750 kat cams.
The kat 1100 cams were almost exactly the same (duration and lift) on the exhaust side as the kat 750 cams.