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Project....7sec turbo busa!

Hey Skip,

I'm kinda late to the party on this one, but I must add my highest compliments on such a great thread. Great pics, and write up - very cool stuff!
I consider it a privilege to have had you work on my bike in the past. Nothing like a great wrencher when you really need one.
Say, now that I'm back here in the midwest, and you being an original Hoosier, know of any good ones in my area?

Cheers,
Kevin
 
MR. WOMO said:
now that I'm back here in the midwest, and you being an original Hoosier, know of any good ones in my area?
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back east?!?! when did you moved? ann arbor is about 6 or so hours from where i used to live. i don't know any good wrenches there, only in indiana, and i'd guess it wouldn't be worth the 6 hour drive.
 
About a year ago now. With my wife and I both from this area originally, and the grandparents not being able to see the little ones very much, we decided it was time - it didn't hurt that CA real estate profits assisted in the move!
Too bad the Midwest riding season is about 1/4 that of the Bay area's! I figured it was a stretch on the wrench Q, but never hurts to ask.
Keep the other peep's rides cruisin' along though, and keep the informative threads goin' too!

Cheers,
Kevin
 
elskipador said:
the lines...well.....the directions say the big 1 is the feed. however the directions were ok.....@ best. the plumbing is right, as the lines are to different, but i feel you're right about the actual names.

so note, i'm now gonna say the larger oil line on the bottom of the oil pan is the return and the smaller stainless line off the block is the feed. we are also running a full 4 qt of oil, as recommend by the turbo maker.
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Hey skippy.. I hate to be a dink... But Rayman is correct. You/The Directions have the Turbo's Oil Return and Send lines, reversed....
The oil DUMPS oil via gravity back to the pan, and gets it's supply via the oil pressure sender port that you t'd off of.

Also, that is ONE NICE busa, I'll remember not to try and race him with mine... Up until I get the Supercharger :teeth

What HP goal is he going for? I'm thinking mid to high 200's since I saw no water injection ?
 
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you are correct sir, though the instructions have them labelled the other way around.
 
any word on what HP hes shootin for ?

DAMN those bolts that block the PAIR ports scare me... NO way in hell I'd have used those without double nutting them.
 
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the bolts in the exhaust will be fine. That idea has been around for a while. Think of it like this, if your motor mount bolts don't back out, why would these?
 
JesasaurusRex said:
1. Spacer will lower compression ratio you are correct, however so will stacking head gaskets, doesnt mean its the right way to do it. Thing is you want as tight of a quench as possible with out running into piston to valve clearance. Now i have yet to really tinker with a motorcycle engine but some of you know im kinda big into the cage thing. Now having a tighter quench will reduce the chance of detonation even if the compression is higher. Lets say you have a motor w/ 11:1 static compression and a quench of .040 . 0 deck height plus .040 head gasket = .040 quench. Now lets say you have a 10.5:1 static compression motor with a quench of .080 . 0 deck height, .020 gasket, .040 spacer, .020 gasket = .080 quench. Now even tho are second motor has half a point lower compression than the first it will still have a higher possability of detonation on lets say 91 octane just because the quench is twice as bad. Thing is with a tighter quench as the piston starts moving to tdc the air/fuel mixture starts moving around a whole lot more because of the lesser room it has in between the piston and the cylinder head. Meaning lesser hot spots and a reduction in pre ignition. Now i am sure some of you know this already but im also sure there are a lot who do not know that is why i am bringing it up. Now i used .040 for a quench because on a standard sbc nothin to spectacular this is pretty much the rule of thumb to go by that is safe. However like i said i dont have too much experience in the bike engine world but im sure you can get away with a quench even tighter than that just because the valve lift is probably so much lower because of the OHC thing. You must also take into account operating temperature and how parts start to expand when they get hot yada yada yada. But hey i hope that sheds some light on the subject. Just my take on the thing.
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Ya know dude, your pretty damn bright on things, except the above needs an addition, and maybe a little bit more look into depth for ya.

YOU ONLY stack headgaskets, when you can NOT shim the cylinder. The reasons for it are SIMPLE. When you shim the cylinder, it's NOT taking the brunt of the combustion forces. So it's WAY less likely to fail. It's also been done since damn near the internal combustion engine's birth. However, the thickness of what your are ADDING, is also required to be there via the timing chain(s) as well. If they can't stretch that far, your screwed.

As in the case of the hayabusa, your not going to get more then 1 point drop in compression via pistons (I believe that was stated already). The only alternative is INSANELY costly, via replacing RODS, and tearing the entire motor down, thus offsetting the labor costs a HUGE ammount.
 
396 said:
the bolts in the exhaust will be fine. That idea has been around for a while. Think of it like this, if your motor mount bolts don't back out, why would these?
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Your motor mount bolts have a seating surface that provides resistance. :cool
 
Again guys, turbo pistons are available for the Busa. JE makes nice ones. The spacer plate is just a more cost effective way of doing it for this application. Hundreds have been done this way.
 
Dopesick VFR said:
Your motor mount bolts have a seating surface that provides resistance. :cool
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It's not worth arguing. All I am saying is, it has been done many times before. It may not be the best, but it will work.
 
Dopesick VFR said:
Ya know dude, your pretty damn bright on things, except the above needs an addition, and maybe a little bit more look into depth for ya.

YOU ONLY stack headgaskets, when you can NOT shim the cylinder. The reasons for it are SIMPLE. When you shim the cylinder, it's NOT taking the brunt of the combustion forces. So it's WAY less likely to fail. It's also been done since damn near the internal combustion engine's birth. However, the thickness of what your are ADDING, is also required to be there via the timing chain(s) as well. If they can't stretch that far, your screwed.

As in the case of the hayabusa, your not going to get more then 1 point drop in compression via pistons (I believe that was stated already). The only alternative is INSANELY costly, via replacing RODS, and tearing the entire motor down, thus offsetting the labor costs a HUGE ammount.
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I was stateing that you could add head gaskets and achieve the same thing, sure itll blow out a shit load easier but still none the less same affect. I wasn't saying its a good idea its worse than the spacer by far but still same effect none the less if it holds together.
 
Be sure to keep us posted ont he progress of the bike. Hopefully the dyno session is going smoothly.
 
oh i will. looks like BRG will have the cams degreed and the dyno tuning done by the weekend...........hopefully :teeth
 
Cool! Gets some miles under his belt and then get him to the track.
 
just trying to add more riders to the sport!
Can't get any of those others guys to do anything (nc1320).

Do you know anything about the Crazy D guy that says he races??
 
396 said:
just trying to add more riders to the sport!
Can't get any of those others guys to do anything (nc1320).

Do you know anything about the Crazy D guy that says he races??
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donno the guy, he on 1320?

Also i donno its kinda hard to drag 10 sec and faster cars out to play, lot of times theyre not too streetable, risk is worth the reward (being fame) however for the right price...i donno its still kinda hard half the guys probably don't have trailers and when ever they do go to the track bum a ride off a friend (myself included) thats my take on it, as far as 12+ second cars, shit you can find a run anytime of the day but whats the fun in runnin 12 + second cars :teeth
 
I guess the guy wanted to race SOLO AND KINGTOM. Just some guy on the street that was talking.
 
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