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4 valve per cylinder vs 2

  • Thread starter Thread starter Guest
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tkent02 said:
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.
Click to expand...

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

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.
 
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 said:
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
Click to expand...

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
 
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.
 
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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
 
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.
 
trippivot said:
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
Click to expand...

For NITRO but NOT naturally aspirated!!! The 4 valve head will ALWAYS make more power, on same sized engines! Did you forget about STAR'S new 4 valve head?!! NO CONTEST Jeff!!!!!! Ray.
 
Star Head?

Star Head?

Now I gotta go look at the head. Maybe they should also think about some new, stronger cases as the new power will break them all.
Yup Ray, I have fout of them. And I believe the '88-'89 "Dot" 750 head has them as well. They are about 500 grams less than the aluminum ones. I need to re-check but maybe 2,000 grams for the Alu. and about 1,500 for the Mag. ones.
Laters
Greg
 
gmansyz said:
I prefer the '90-'92 GSXR750 head with the '86-'87 the next choice.
Click to expand...
Is this the 86-87 GSXR750 head or the GSXR1100 head?

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.
Click to expand...
What do you mean by "Either weld teh cylinder up or the slot on the head."?

Note: I already have a dot head for my GSX1100ET and do not intend on changing plans for this project. However your comments have aroused my curiosity. Any insight would be very appreciated!

Thanks!
 
trippivot said:
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.
Click to expand...

Call me Jeff. You use 1150 cylinder studs, GSXR cams with GS cam sprockets & cam chain, cut down the GSXR front cam chain guide to length & to fit in the GS cases, 28mm freeze plugs for the lower front oil return holes in the GSXR head, GSXR head gasket, HAVE to use a top end oiler. Less to do if using a big block VS a stock block but still easy either way. No custom gaskets or machining if using dished or flat top pistons. Only tricky when using a DOT head with domes. To ME, if using domes & compression, the 1100 GSXR head is a better choice. To give you an idea, bolting an 88-89 GSXR 750 head & cams onto a stock 1150 or 1100 bottom end is good for almost 20 HP with cam degreeing & carb tuning done correctly. Ray.
 
rapidray said:
28mm freeze plugs for the lower front oil return holes in the GSXR head,
Click to expand...
Can you still get brass freeze plugs in your area Ray?
In this neck of the woods, I was only able to find steel ones. Would they be OK .. or would I risk cracking the aluminum when inserting the steel freeze plug?
Thanks!
Normand
 
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