1428 big block cylinder - will it have heating problems ?

Am going to build a turbo motor this winter. Have an 1170 kit I have used before and was fine. Purchased a good shape used 1428 w/big block cylinder. Is the lack of openings for pass thru air compensated for by the fact that it is much thicker to act as a heat sink? Will be 8:1 compression and pistons powder coated on tops for heat and on sides for scuffing. Also have been told by someone whose opinion I value - that he has run aftermarket turbo cams and stock cams.......and would choose the stockers. Opinions or experiences appreciated.

THANKS, Jeff

i have several turbo'd 900/1000's i have tried many different cam combo's over the years and have found the stock cams perform the best,as far as overheating i think it will run hot if you ride in the street with traffic,i personally do not go bigger than a 1075 kit.

I have a big oil cooler on my 1105 and it needs it. I do know a guy that ran a 1327 turbo on the street for years but I wouldnt. It dynoed at 220 in mild street trim at the Daytona Dyno Shootout years back with an antique Mr. Turbo setup & S&S carb. Id leave it smaller & let the turbo make the power myself.

mtkawboy wrote:

I have a big oil cooler on my 1105 and it needs it. I do know a guy that ran a 1327 turbo on the street for years but I wouldnt. It dynoed at 220 in mild street trim at the Daytona Dyno Shootout years back with an antique Mr. Turbo setup & S&S carb. Id leave it smaller & let the turbo make the power myself.

I share that opinion as well. 14.7 lbs of boost effectively doubles the size of the motor. You don't need them so big on the street IMO.

I'll bet that 1327 wasn't pushing much over 9 or 10 lbs of boost.....

8 lbs in street trim, 9.75 @145 on a street shootout tire & long swingarm

i did the 1428 turbo route on a basically stock unraked chassis with 2" over arm years ago,like the commercial says just say no!!!!!!!!!!!!!!!!!!!!!! :laugh: jumping out of airplanes in the army and braking my back was nothing like the feeling i got everytime i cracked the throttle open on that overpowered/ underbraced /underbraked/uncontrollable beast!as John Force said i saw Elvis and Jesus at the 1,000' mark everytime i tried riding that beast!:blink: :ohmy: :huh: :dry: :blush: :S the only reason im building my 1385 project is because ive got lots of stuff laying around and ive had a lot of trial and error time since the 1st attempt to learn how a chassis is supposed to be done.id say build an 1197 with 900 crank and a set of carbs and spend your money dialing in the chassis

PLUMMEN wrote:

i did the 1428 turbo route on a basically stock unraked chassis with 2" over arm years ago,like the commercial says just say no!!!!!!!!!!!!!!!!!!!!!! :laugh: jumping out of airplanes in the army and braking my back was nothing like the feeling i got everytime i cracked the throttle open on that overpowered/ underbraced /underbraked/uncontrollable beast!as John Force said i saw Elvis and Jesus at the 1,000' mark everytime i tried riding that beast!:blink: :ohmy: :huh: :dry: :blush: :S the only reason im building my 1385 project is because ive got lots of stuff laying around and ive had a lot of trial and error time since the 1st attempt to learn how a chassis is supposed to be done.id say build an 1197 with 900 crank and a set of carbs and spend your money dialing in the chassis

It is scary but ohhhhhh so fun!

fyrbawl wrote:

Am going to build a turbo motor this winter. Have an 1170 kit I have used before and was fine. Purchased a good shape used 1428 w/big block cylinder. Is the lack of openings for pass thru air compensated for by the fact that it is much thicker to act as a heat sink? Will be 8:1 compression and pistons powder coated on tops for heat and on sides for scuffing. Also have been told by someone whose opinion I value - that he has run aftermarket turbo cams and stock cams.......and would choose the stockers. Opinions or experiences appreciated. THANKS, Jeff

Jeff - Just a few quick thoughts (having been down this road a few times).

Producing lots of power is fairly easy (bring the wallet), but figuring out what to do with it and keeping it together is a whole nuther story You will probably spend more money just keeping the motor together and getting the power to the ground than you will on the performance stuff. Something to think about.

With regards to the big block and overheating - I've run big blocks (MTC) over the years (1327 and 1500) on my blower bike without problem - see pictures in the follow thread - kzrider.com/index.php?option=com_kunena&...mit=20&limitstart=20 - you will need a good oil cooler and be cautious regarding tuning though.

With regard to camming the turbo bike - for street use, save your money and just use the stock cams and change the timing of the lobe centers. You will want to put your money elsewhere.

Just a suggestion - First thing to do before you start your project is WRITE DOWN EXACTLY what you want the bike to do, and what your budget is to get there. If you can't write your goal down and spell it out exactly - then you need to sit down and do some more thinking I have seen way too many people over the years just kinda meander around without a clear goal and clear understanding of what they wanted to do and spend way, way too much money on a bike that either did not end up the way they wanted performance wise or was unridable once they got it done. (we have all been there - done that )

Some questions to ask yourself.

How much horsepower do I need ? 100bhp ?? 500 bhp ???

How much horsepower can I safely handle ? - be honest - have you ever ridden a 300 bhp bike ??

What kind of riding do I do or want to do ?

What kind of performance am I looking for ? (ET or dyno bragging rights ?)

What is my budget going to be ? (be real - I have seen way too many folks over the years start a $ 1000 project only to be digging thru their wallet looking for $ 10K to try and finish it off. - They might as well have started with a Busa to begin with)

Some final thoughts on your turbo project

After ya got the turbo stuff collected (turbo unit, carbs or injectors, waste gate, ignition system, etc)spend a large chunk of your remaining budget bullet proofing the motor.

Do the crank
HD crank bearing studs
HD cylinder studs
HD cylinder stud nuts
Maybe external oiler system
Slotted cam sprockets
Cam chain tensioner
Windage try
Race oil pan and pickup
Maybe crank main bearing brace
Undercut tranny gears
HD valve springs - I wouldn't put much money into the cyl head - just keep it together
O-ring the big block and go with turbo pistons
etc., etc., etc - look in the APE catalog - make it your friend :lol:

Lastly - I would spend the rest of your remaining budget on the chassis - I warned ya it was gonna get expensive :lol:

Install a Kosman frame brace kit
Might want to rake the fork a tad
Maybe some HD motor mounts
Maybe a steering dampner
Buy a really good swing arm and rear wheel/tire setup that will match your project goals - this is super important. This is where you will spend some serious cash. As I mentioned earlier - producing gobs of power can be easy - getting it to the ground can be damn expensive

Anyway - hope this helps - sorry to be so long winded

Last but not least - give APEJAY a call at APE. A wealth of knowledge and parts galore for all us ole duffers :lol:

Good luck with your project !!!!!!!!!!!!!

When the turbo Busas were laying down 365 hp + on the dyno I recall people laughing at 220hp for the Kaw. Id have to ask just how many people have ridden a KZ with "ONLY" 220hp. That is one scary SOB on the street with only 220hp. Not 1 out of 100 could get it down the 1/4 mile would be my bet

zippy wrote:

fyrbawl wrote:

etc., etc., etc - look in the APE catalog - make it your friend :lol:

!

Your friend kzzone.com/

mtkawboy wrote:

When the turbo Busas were laying down 365 hp + on the dyno I recall people laughing at 220hp for the Kaw. Id have to ask just how many people have ridden a KZ with "ONLY" 220hp. That is one scary SOB on the street with only 220hp. Not 1 out of 100 could get it down the 1/4 mile would be my bet

:laugh: AMEN !!!!!!!:laugh:

Thanks for the rambling. Always good to get different perspectives and benefit from others experiences. If money not critical....turbo cams better than stockers ? Also intend to go with Mikuni flat slide carb. Opinion and/or size suggestion ?


THANKS, Jeff

Years ago I had a new Drouin unit (incomplete). I parted company with it, don't know what ever happened, but I didn't want the headaches.