200HP on stock bore, Is it possible??

O

OB_TurboTim

Registered
Sure its possible. Wasnt a 1300cc motor a big motor pre Busa??? If you can make 180 hp with an 1300cc air cooled GSXR, it can be done, especially with the improvements on the head and intake.
 
<<<<Sure it's possible.>>>>

TurboTim, tell us how?!?!?

I'd like to know, anyone else?

Remember, stock bore!
 
Frank,I cant tell you how, because I havent done it.
But seing the way the head flows and how easy (yes easy) it was to get 200+ out of one with pistons, mild head work and cams, I figure it can be done with stock bore.

How much HP are the pistons worth? Could you get the same amount of HP from raised compression, larger valves, bigger cams, more head work. I am guessing yes.

Just speculation, I could be wrong. If you or anyone else has tried and not gotten 200 I would be interested in hearing about it.

The other question is why do it with stock bore? I know its a challenge and its cheaper, but every bike that any of us have ever put pistons (couple of mm's)in has always seemed to be as reliable as stock bore. If not better, stronger.
 
Remember this does not have sleeves...there`s only aluminum to back up that thin coat on cylinder walls...4mm is to much with stock block...2mm puts 40 thousands a side back..heating in summer?...remember this is aluminum not cast iron or steel. 2mm over I think is great for drag strip but everyday bike...may get tricky...I`m going to let Frank find out for me...ha ha Frank...
 
Would it be possible to achieve 200 hp leaving the stock bore and if it is possible what would the safest setup be?? I read on the Lee Shierts web site
(www.leesperformance.com) that he was planning on making an attempt to make 200hp w/stock bore but I have never heard anything else since his accident.
Hopefully it can be done without having to resolve to using alot of compression. Any info would help.
Thanks Jorge
 
Hey Chris, I've talked to a couple of builder now and they both said as long as you don't go way out on your compression there won't be a heat factor, at all!
 
I have a question--What has to be done to replace the plating in the cylinders when you swap pistons? I am not familiar with this coating process.
If you stay stock bore the piston to wall clearance better be good with the aftermarket pistons. Or can you hone to fit even with the plating?
 
Bob, J&E is spot on with bore to piston... J&E recommends a company to recoat the cylinder walls...this company will tell you how much over to bore your block before they recoat it. Usually around 2-3 thousands...this is if you go 2mm over. It cost around 300 bucks to get one recoated...plus whatever someone charges you to bore oversize to match pistons.Its up to someone to decide if that 60cc is worth it or not. I`m more concerned with durability than cost though.What does someone think that 60cc is worth in HP? 5-10HP? more? Frank had my hands on 2mm over kit today...nice.
 
TurnNBurn: Everybody wants to talk about this but...The horses mouth never wants step forward and say that they can do it or it can be done.

As for Me, I'll never believe any of it until I see some hard facts! Or until someone with some creditability says otherwise.

It's that simple.

...Frank
 
I'm pretty sure that Turbo Ricks bike is stock bore and he is over 200 hp with stock exhaust. I think it just has higher compression.
 
Turn N Burn: We were just using stock cam's and 12.7 to 1 compression when the motor let go.

I think the Head gasket and the lack of space between each cylinder was My problems.

I also had a Big problem with Heat that probably contributed to all that also.

I think if I used a different Cam setup I could have controlled the Heat factor a little better but it blew up before we could get to that.

PkBoxer: You should share your findings with all of us. I know I'd like to hear them!

...Frank
 
I am lucky enough with my job to talk to most of the big name motor builders in the country on a weekly basis, and being a Busa owner I always pick their brains on what they are doing. Their are alot more Busa projects out there then any of you would believe. Everything from underbore dwarf car projects, to 2,3 and 4 mm overbore, to overbore with a turbo. Anytime anyone wants to talk Hayabusa (which is one of my favorite subjects) just give me a call at Cometic Gasket @ 1 800 752 9850.

Paul
 
I want thank you all for your replies. the reason I posted the question is b/c anyone can make more power by increasing the cc's, so I'd like to see more " know how" involved in making the power.(Excuse me almost anyone). The advantages of leaving the bore stock are numerous, one of them being if you were to decide to go all out and put a turbo on the thing you'd be glad you did. I'm just saying if you can make 200 or dam near close to it why risk all the negative factors that come into play when you open it up. If someone has done it or come close please share your set up with us.
Frank what happened to your motor was very proabable even if someone else makes the 1430 work I seriously doubt that it will be reliable or streetable for that matter. There's nothing there to hold your head gasket and cylinder pressures were proabably too high, together w/ vast amounts of heat ( your gonna have proablems).Jorge
 
JE pistons,Web cams,Power commander and alot of detail work.
I use this bike in competition ( Land Speed Racing) so I can't really tell all, some of my competitors come to this site and lurk. If you need to know a specific thing ask me

Turbo Rick
 
Well I happen to have 2 stock bore Busa's one makeing 200 hp normally asperated with stock pipes and the other one makeing 242 hp with a stock motor on nitrous and stock pipes. So yes you can make 200hp with stock bore

Turbo Rick
 
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