4 valve per cylinder vs 2

[rapidray]

I had a dry clutch 86 that had some magnesium parts on it but the valve cover wasn't one of them! I've never seen or heard of a production released magnesium GSXR valve cover. Ray.

[gmansyz]

Trippi, RapidRay and I both like the GSXR head on the GS.Works really well. The best for power was the "Dot" 750 head. You can even find those on the short stroke 750Katana. I prefer the '90-'92 GSXR750 head with the '86-'87 the next choice. No need to modify the head like the "Dot" head, GSXR11 or 1200 Bandits as the cam chain slot is longer on those. Either weld teh cylinder up or the slot on the head. The other 750's don't need that but all need plugging or re-routing of the drainback holes in the front of the head less you have an oily mess. An pair of preblems with the "Dot" head is one, they are prone to cracking and the other is the carbs are raised more than the rest and can create problems with the tank. Though, you could always raise the tank.
I am working on a 30/26 '92 head. Had spacers made for teh rocker shafts adn the cam thrust flanges welded up. Just a little lazy to go an finish it. Also have an '87 with 28.3/26 valves. Needs love and porting. I also like the older stuff as many came with magnesium valve covers. Oh, anyone got a mag valve cover for the GSXR1100???? I need one for my project.
Hope some of this helps.
Laters
Greg

[trippivot]

I am always willing to learn something new - be great to know exactly what it takes for the bandit conversion along with pictures.

I like cheap power and the bandit ,or gsxr dot 750, head on gs bottom is a GREAT thread to make. will fit into a stock frame?

head/base gasket thickness and custom piston crown to adjust comp ratio.

[stetracer]

gsxr on top of gs - well my opinion is this = if it was the most trick set up, a lot more of us would be doing it.

with very little work a 1150 head can make 100 cfm thru 28.5/24 valves @ .400 lift. From this point a tiny set of .348 "drop in" camshafts installed on top of 1327 OR 1428 cc engine you can create 200+ HP easily

Huh!
You do know that a Bandit/GSXR head has 28.5/25 mm valves stock
I am not saying that it is the most trick set up But it is a lot less expensive to do a Bandit/GSXR head than a GS1150 head.
Unless you know someone who can build me a GS1150 head that is as good as a Ported Bandit/GSXR head with 30mm intakes, 25mm exhaust, with Titainium retainers and HD springs for $750 then the Bandit/GSXR head is the one for me

[Mekanix]

When you guys build the larger CC engines what do you do to make up the combustion chamber volume?
Or what do you do to lower the compression ratio?

[trippivot]

hemi's are the best.

2 valve is the BEST for unlimited all out power - no compromises hemispherical dome . MTC vortex and vortexII headded 1700++ cc engines that make near 400 HP naturally aspirating - little wasteful at lower rpms but makes up for it when full on!

- bottom line - more friction - but has stronger components and less moving parts. longer lasting head also like 850/1000/1100


4 valve has better "low lift" flow. more efficient / more power from smaller engines. peppy and streetable , cleaner combustion burning more %'s of intake charge at idle thanks to TSCC .

bottom line--less friction - less stress - lots of delicate moving parts.

gsxr on top of gs - well my opinion is this = if it was the most trick set up, a lot more of us would be doing it.

with very little work a 1150 head can make 100 cfm thru 28.5/24 valves @ .400 lift. From this point a tiny set of .348 "drop in" camshafts installed on top of 1327 OR 1428 cc engine you can create 200+ HP easily.

With a lot of work you can get a GS1100 big port head to flow 110cfm@ .500" thru 42/38 and .480/.395 cams.. Now with that you can crush twist mangle any 8V 64.8mm crank and cases..

I changed to 16 valve after I found the mechanical limits of short stroke 8 valve suzuki engines. --bigger than 1238cc and you are messing with fire.

[stetracer]

LOL! Me selling parts OH! you crack me up.
I hardly ever sell parts I buy the crap out of them. Ok I do sell a few parts once and awhile but not very often. But I do Motor work and port heads out of my garage to recoop some of the cost of my bike habit. All my running bikes have my heads on them. I have gotten pretty good at it. over the years. And how can you take credit on how fast the motor goes if your not the one porting the head and tuning it. The head is where most of the power is made.

[blowerbike]

they sale GS parts/ race parts on ebay.
after i posted i seen that you wasn't him.
i was just curious.

[stetracer]

stretracer,
are you from the tampa area?
rideoutcyclesinc maybe?

I am 90 miles south of Tampa. When I play I am at Bradenton
I don't know them but I have heard of them on e-bay.
Why do you ask?

[blowerbike]

stretracer,
are you from the tampa area?
rideoutcyclesinc maybe?

[stetracer]

I like to drag race all my bikes and I like them to last that is why I like Suzuki 16v motors best because they are the cheepest and easiest to make extra hp. Lots of good aftermarket parts to choose from and even when built they still last if done correctly.

When I get my new to me GSX1100EFE I am removing the 1150 head and I am putting on a Ported 30/25 Bandit 1200 head on it. Just to add more HP. Why go to the Bandit/Gixxer head because it is cheeper and just plain better for what I want it to do I don't care to keep the stock look as the whole bike is custom already. And I want the bike to run at least some 9.40's it won't do that without spending some big $$$ on the 1150 head to make it flow as good as a ported Bandit head. Plus I have 6 Bandit/Gixxer heads sittin on the shelf and I can get a pretty penny for a clean virgin 1150 head to help recover the cost of the Bandit/Gixxer head build

[stetracer]

91 92 gsxr...performance cams was a huge amount of $$$$

And not a good idea either.

[blowerbike]

91 92 gsxr...performance cams was a huge amount of $$$$

[stetracer]

I know they are good, and Bandits have different engines than the old GSes.
Have you commonly seen 16 valve GS engines go over 100,000 miles without engine work?

Maybe they do, but I have never seen it.

Yes when I worked at a bike shop I saw it on the bagger guys. I changed a $hit load of tires in my days
The roller bearing 16v GS motor if the oil is changed regular and not beat up on ( spending it life at red line ) would last as long as any motor Suzuki has made. It is not the motor design that makes one suzuki motor last longer than the other. It is the owner design that is the problem. ( baring any factory defects ). Now when you talk performance you can't beat the 16v head. and as the years go by they only get better.



Steve,
Suzuki did make a 16v rocker arm head that used shims for adjusting the valves for two years 91 and 92. A good head just don't put bigger cams in it.

[tkent02]

I was talking performance but as you mention longevity yes the motors will both go over 100,000 miles if treated the same. There are guys getting over 100,000 miles on the old Bandits. Incase you did not know it Suzuki builds a pretty good bike

I know they are good, and Bandits have different engines than the old GSes.
Have you commonly seen 16 valve GS engines go over 100,000 miles without engine work?

Maybe they do, but I have never seen it.