All your engine questions here...... - Suzuki GSX-R Motorcycle Forums Gixxer.com

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post #1 of 404 (permalink) Old 12-21-2005, 02:12 AM Thread Starter
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All your engine questions here......

You guys have a bunch of good questions on this forum, but they are spread out. I thought we could put together a thread to consolidate them all.

We are a professional race shop/engine shop that specializes in GSXR motors. We build race motors for Roadracing, dragracing, flat track, street, and SCCA D/C Sportsracers. We also run a 2 rider Pro AMA Roadrace team.

So...if you have any engine building questions what so ever, post them here and I will try to answer them.
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post #2 of 404 (permalink) Old 12-21-2005, 03:28 AM
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Re: All your engine questions here......

Are you covering turbo's and Nos here also?
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post #3 of 404 (permalink) Old 12-21-2005, 03:36 AM Thread Starter
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Re: All your engine questions here......

Sure...to some extent. We specialize in all motor set-ups but we build motors, heads, and install NOS and turbo systems for some of the fastest bikes in the country.

If there is something I do not know the answer to, I will find it or point you in the direction of somebody who can answer it.
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post #4 of 404 (permalink) Old 12-21-2005, 03:45 AM
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Re: All your engine questions here......

You dont happen to know where i could locate info on a toyota ct12-c turbo?
I have one, very tiny good for 1 - 1.5 liter engine 150-200hp
would this be sufficient for an older 1074 engine at low psi 3-6 or less.. Very fast spooling water and oil cooled.
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post #5 of 404 (permalink) Old 12-21-2005, 06:22 AM Thread Starter
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Re: All your engine questions here......

Barry @ Veolcity raceing would be the man to ask about specfic turbos. We use his kits exclusively.

As for the motor itself......
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post #6 of 404 (permalink) Old 12-21-2005, 07:53 AM
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Re: All your engine questions here......

Okay, Chip. I'm game.

So I have a '02 600 with 9500 miles. Full Yosh exhaust and PC3. My bike sees the street only (considering getting a 2nd bike for the track). If I was going to throw $1,000 at the motor for parts/labor, what is my best investment? Kind of a generic question, but threw it out there anyway.
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post #7 of 404 (permalink) Old 12-21-2005, 09:15 AM
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Re: All your engine questions here......

I was wondering if the 750 head and the 1000 head were identical. Also have you ever heard of a stroker 750 and what kind of hp it might put out.
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post #8 of 404 (permalink) Old 12-21-2005, 09:34 AM
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Re: All your engine questions here......

This winter im dropin my motor out of my K3. I am going to keep the stock head gasket, polish up the head some and port match where the TB's are against the head. I can look down past the TB's and see where the head is smaller. Also, im going to put the 750 valve springs in also. For now would it be ok to put the 750 intake cam on the exhaust side for now until I get the Web cam and adjustable sprokets on there? Or should I wait and do it all at one time? What kind of gains would just the 750 cam get me?
On the head, I was going to match the intake ports, polish them up, polish the bowls and there the valves are and the exhaust. How much is that worth?

Im thinking of just going web cam on the intake, 750 cam on the exhuast, adjustable cam sprockets, stock head gasket, 750 springs and minor stuff to the head then the manual cam ten.

Whatchu think?
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post #9 of 404 (permalink) Old 12-21-2005, 09:45 AM
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Re: All your engine questions here......

Quote:
On the head, I was going to match the intake ports, polish them up, polish the bowls and there the valves are and the exhaust. How much is that worth?
If you do it yourself,it may very well make alot less then stock
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post #10 of 404 (permalink) Old 12-21-2005, 10:03 AM
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Re: All your engine questions here......

Quote:
Quote:
On the head, I was going to match the intake ports, polish them up, polish the bowls and there the valves are and the exhaust. How much is that worth?
If you do it yourself,it may very well make alot less then stock
+1.
Polishing does nothing. You don't want a shiny or even extremely smooth finish.
The 750 intake cam on the exhaust side will need an adjustable sprocket fitting.
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post #11 of 404 (permalink) Old 12-21-2005, 11:00 AM
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Re: All your engine questions here......

What if I just matched it up where the TB's sit on the head?
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post #12 of 404 (permalink) Old 12-21-2005, 05:23 PM
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Re: All your engine questions here......

matching the tb boot to the head will do almost nothing...you need to do some work in both the intake and exhaust port to power...second that on the polish thing, that's a no no!!!

as for the valve spring question, you could put 750 springs in it but i would recommend a good aftermarket spring instead...they are available for about $80-$100 a set or about $350-$400 with titanium retainers...i would also tell you to save and invest in a good exhaust cam...web has some very good stuff now and works alot better than that intake cam on the exhaust side...

i'm sure chip will chime in here and set all of us straight..

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post #13 of 404 (permalink) Old 12-21-2005, 10:56 PM
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Re: All your engine questions here......

Gsxr1000k1 - k3 -k5.

What is the max hp you can get from these with stock bore & stroke.

No NOS or turbo.
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post #14 of 404 (permalink) Old 12-22-2005, 12:40 AM Thread Starter
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Re: All your engine questions here......

Sorry for the delay guys.......Here are some of your answers:

1.) 02 600 and $1K - You are really in a middle ground area with motorwork. Anything for $1K after what you already have done will be minor gains (assuming the bike is mapped right). For a $1K You could do Web Cams/Cam Sprockets and see a gain on top, but a loss in the middle. You could port the head and use a Yosh thin Head gasket and see a little there, but you would really need to do the cams as well and doing both goes over your budget. For any real gains significant would need to do a piston kit and all the other stuff discussed and then you are talking in the $3-$4K range. A full head build with cams would cost you a little over $1600 and would 6 - 10hp more

2.) 00-03 750 and 01-02 1K heads are the same, all others are different. Stroker 750? Oh hell yeah. We have a 3mm crank in stock, combined with our 3mm pistons makes it a 866cc and you could expect around 165hp.....nasty....straight nasty! Still very streetable as well.

3.) 03 1K - You can use 750 intake cam on the exhaust side as see around 3hp but cam sprockets are required and timing is critical. 750 valve springs are not required.....your not increasing the lift enough. As for you porting the head......good luck.....I can't comment on that other than be careful, it is real easy to screw it up and loose power. Web intake and OEM 750 exhaust.......seriously.....do yourself a favor and put a complete set of Web Cams in if you are going to spend almost the same money and do exactly the same amount of work...

4.) Max power with stock bore and stroke? Not really a fair question because the only really high end stock bore and stroke motors we do have to conform to AMA Superbike rules and they are pretty restrictive.....nobody has ever asked about a stock bore and stroke with every thing we know to do....Our AMA Superbike motors make:

03-04 GSXR1000 = 185hp or so
05-06 GSXR1000 = 195hp or so.

Did I miss anything?
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post #15 of 404 (permalink) Old 12-22-2005, 01:34 AM
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Re: All your engine questions here......

Chip,

I have an 01 1000 (stock internals) and was thinking of just stroking the crank 4mm and not doing any boring.

What kind of hp/torque gains could be had and is it worth it?

Would I need aftermarket rods?

thanks
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post #16 of 404 (permalink) Old 12-22-2005, 01:40 AM
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Re: All your engine questions here......

Quote:

2.) 00-03 750 and 01-02 1K heads are the same, all others are different.
When you say same, are the motor mount hole locations the same too?
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post #17 of 404 (permalink) Old 12-22-2005, 02:33 AM Thread Starter
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Re: All your engine questions here......

Quote:
Chip,

I have an 01 1000 (stock internals) and was thinking of just stroking the crank 4mm and not doing any boring.

What kind of hp/torque gains could be had and is it worth it?

Would I need aftermarket rods?

thanks
I would consider doing the opposite....boring with no stroke, if you only wanted to go in on direction.

If you are going to stroke it, you have to spend the same money as if you were to bore and stroke it. Pistons have to be replaced and depending on the stroke, so does block machining. There are several disadvantages to stroking that have to be compinsated for, like side loading, frictional loss, and Piston speed. If you stroke it would deffinately have to use aftermarket rods and pistons......why not use bigger pistons?

I would suggest and 1143cc combo.....3mm bore, 4mm stroke....and around 205hp and 110ft-lbs of Torque........MotoGp power for the street...
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post #18 of 404 (permalink) Old 12-22-2005, 05:10 AM
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Re: All your engine questions here......

What's the life like on bored 1000's? I've seen issues with big bore stuff over here, especially busa's suffering blow-by and gasket leakage. It could be poor machining and plating causing some of it.
Some of the aftermarket rings aren't a patch on the oem stuff too.
I'd like to make a good contact for reliable parts at cheaper than "rip-off britain" prices. Valves, springs, cranks, pistons are some of the things that are hard to find with testing mileage already done. I'm sick of being everyone's parts development donkey!!
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post #19 of 404 (permalink) Old 12-22-2005, 05:56 AM
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Re: All your engine questions here......

Quote:
Quote:
Chip,

I have an 01 1000 (stock internals) and was thinking of just stroking the crank 4mm and not doing any boring.

What kind of hp/torque gains could be had and is it worth it?

Would I need aftermarket rods?

thanks
I would consider doing the opposite....boring with no stroke, if you only wanted to go in on direction.

If you are going to stroke it, you have to spend the same money as if you were to bore and stroke it. Pistons have to be replaced and depending on the stroke, so does block machining. There are several disadvantages to stroking that have to be compinsated for, like side loading, frictional loss, and Piston speed. If you stroke it would deffinately have to use aftermarket rods and pistons......why not use bigger pistons?

I would suggest and 1143cc combo.....3mm bore, 4mm stroke....and around 205hp and 110ft-lbs of Torque........MotoGp power for the street...
The cost factor plays a big role too. I'd rather just turbo it than the bore/stroke idea which costs ..what 1.5-2X the amount.
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post #20 of 404 (permalink) Old 12-22-2005, 06:16 AM Thread Starter
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Re: All your engine questions here......

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Quote:
Quote:
Chip,

I have an 01 1000 (stock internals) and was thinking of just stroking the crank 4mm and not doing any boring.

What kind of hp/torque gains could be had and is it worth it?

Would I need aftermarket rods?

thanks
I would consider doing the opposite....boring with no stroke, if you only wanted to go in on direction.

If you are going to stroke it, you have to spend the same money as if you were to bore and stroke it. Pistons have to be replaced and depending on the stroke, so does block machining. There are several disadvantages to stroking that have to be compinsated for, like side loading, frictional loss, and Piston speed. If you stroke it would deffinately have to use aftermarket rods and pistons......why not use bigger pistons?

I would suggest and 1143cc combo.....3mm bore, 4mm stroke....and around 205hp and 110ft-lbs of Torque........MotoGp power for the street...
The cost factor plays a big role too. I'd rather just turbo it than the bore/stroke idea which costs ..what 1.5-2X the amount.
That is a huge misconception.......that Turbos are cost less alternitive to building the engine. It's just not true. In order to have a turbo motor that is going to make any significant horsepower gain over stock and be expected to last any amount of time you would have to build the motor to take the added strain of the turbo.....plus the cost of the turbo.......You will spend more money in the end.
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