Boss Hoss motorcycle LS2 mods help
Thread Starter
Teching In
Joined: May 2008
Posts: 16
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From: Lake Arthur, Louisiana
Boss Hoss motorcycle LS2 mods help Hi
I just purchased a new 2008 Boss Hoss motorcycle with the LS2 engine from California Boss Hoss.
They will be removing the stock engine for disassembly and rebuilding with top shelf components and will also sport NOS. I have the goal of 600+hp and 8000rpm minimum before NOS. The bike has a wet sump, and I want it to be durable and last 100k or more before rebuild required. I only want minimum maintenance such as valve lash, etc. The only thing the engine has to spin is an alternator; no power brakes or anything requiring vacuum or good idle. I'm fairly sure it has the GM ECU.
The LS2 is new territory as we previously used the 350 and 502 Chevy and weren't 100% sure on how to proceed and would appreciate any advice. We were thinking AFR heads, light weight forged pistons, MSD coils, etc. The bike weighs just under 1000lbs and looking for mid to top end performance; How would you build the engine???
Thanks
Ricky
I just purchased a new 2008 Boss Hoss motorcycle with the LS2 engine from California Boss Hoss.
They will be removing the stock engine for disassembly and rebuilding with top shelf components and will also sport NOS. I have the goal of 600+hp and 8000rpm minimum before NOS. The bike has a wet sump, and I want it to be durable and last 100k or more before rebuild required. I only want minimum maintenance such as valve lash, etc. The only thing the engine has to spin is an alternator; no power brakes or anything requiring vacuum or good idle. I'm fairly sure it has the GM ECU.
The LS2 is new territory as we previously used the 350 and 502 Chevy and weren't 100% sure on how to proceed and would appreciate any advice. We were thinking AFR heads, light weight forged pistons, MSD coils, etc. The bike weighs just under 1000lbs and looking for mid to top end performance; How would you build the engine???
Thanks
Ricky
LS2 w/only 1000 lbs... that's insane!
I can't be much help except to tell you that the MSD coils aren't worth the money. They've shown zero hp increase on the dyno even above 7k, and a lot of people have had them fail frequently. Stock coils are cheaper and, from everything I've read, much better.
AFR heads are great, but Trick Flows appear to be the best for max top end power.
I can't be much help except to tell you that the MSD coils aren't worth the money. They've shown zero hp increase on the dyno even above 7k, and a lot of people have had them fail frequently. Stock coils are cheaper and, from everything I've read, much better.
AFR heads are great, but Trick Flows appear to be the best for max top end power.
10 Second Club
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Set it up for top end high RPM performance.
Use the lightest crank, rods, pistons you can buy.
ETP 225 heads and a cam with a good idle. You aren't going to want a nasty lope on a bike.
Hell make it a stroker...
Use the lightest crank, rods, pistons you can buy.
ETP 225 heads and a cam with a good idle. You aren't going to want a nasty lope on a bike.
Hell make it a stroker...
Nitrous too? That thing is going to win the "Widowmaker" award for sure.
There are a ton of head/cam setups on here making the kind of flywheel power you are looking for. Just find one you like. As for the bottom end, I would stick with a stock crank, and get some good Callies or Lunati Rods and some Diamond pistons. Stock cranks have gone 8's in cars so I can't see you breaking it on a bike. It is going to be tough getting 8000 RPM with our intakes, but 7000 should be pretty easy.
-Geoff
There are a ton of head/cam setups on here making the kind of flywheel power you are looking for. Just find one you like. As for the bottom end, I would stick with a stock crank, and get some good Callies or Lunati Rods and some Diamond pistons. Stock cranks have gone 8's in cars so I can't see you breaking it on a bike. It is going to be tough getting 8000 RPM with our intakes, but 7000 should be pretty easy.
-Geoff
Last edited by White_Hawk; May 27, 2008 at 01:11 PM.
Thread Starter
Teching In
Joined: May 2008
Posts: 16
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From: Lake Arthur, Louisiana
I don't have any pics of my bike as it has yet to be painted; they come to the dealers unpainted.
You may look at one on the factory website though,
http://www.bosshoss.net/view_bike.asp?x=BHC3LS2
I really appreciate all of the advice so far, Thanx
You may look at one on the factory website though,
http://www.bosshoss.net/view_bike.asp?x=BHC3LS2
I really appreciate all of the advice so far, Thanx
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Thread Starter
Teching In
Joined: May 2008
Posts: 16
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From: Lake Arthur, Louisiana
You want one you say? There are quite a few dealers around depending on where you live, go to www.bosshoss.net/Default.asp to check on dealers.
The LS2 bike is expensive at $52K; I'm dropping around $75K on this custom build which is crazy, but I want it bad. I could buy a new Dodge Viper or ZO6 for that kind of money.
What about the factory ECU and intake? Should I opt for the FAST EFI system and intake??
We will not be using the factory exhaust, a custom one is being built now.
I will have 2 sets of rear wheels, one sporting a drag slick for 1/4 mile track and the chromed version will sport a 300 street tire. I know that I will still be able to break the tire loose at will.
I'm hoping that it will be the fastest street legal 1/4 mile Boss Hoss in the country, and very curious to know what kind of times and speed it will be capable of performing. 8 sec/200mph??
The LS2 bike is expensive at $52K; I'm dropping around $75K on this custom build which is crazy, but I want it bad. I could buy a new Dodge Viper or ZO6 for that kind of money.
What about the factory ECU and intake? Should I opt for the FAST EFI system and intake??
We will not be using the factory exhaust, a custom one is being built now.
I will have 2 sets of rear wheels, one sporting a drag slick for 1/4 mile track and the chromed version will sport a 300 street tire. I know that I will still be able to break the tire loose at will.
I'm hoping that it will be the fastest street legal 1/4 mile Boss Hoss in the country, and very curious to know what kind of times and speed it will be capable of performing. 8 sec/200mph??
The factory PCM should be good for any NA application. The typical problem with the factory PCM (mainly in high boost applications) is the limitations of high impedance injectors. You shouldn't have any problems with getting a large enough high impedance injector at your goal power.
The FAST intake manifold makes impressive numbers for motors spinning up to 7k RPMs... any higher than that, and you'd want a sheet metal intake, or maybe a Vic Jr/elbow setup if you could fit it.
Good luck, wear a helmet, and a foam body suit while you're at it! Death will be riding right behind you at all times!
The FAST intake manifold makes impressive numbers for motors spinning up to 7k RPMs... any higher than that, and you'd want a sheet metal intake, or maybe a Vic Jr/elbow setup if you could fit it.
Good luck, wear a helmet, and a foam body suit while you're at it! Death will be riding right behind you at all times!
I will have 2 sets of rear wheels, one sporting a drag slick for 1/4 mile track and the chromed version will sport a 300 street tire. I know that I will still be able to break the tire loose at will.
I'm hoping that it will be the fastest street legal 1/4 mile Boss Hoss in the country, and very curious to know what kind of times and speed it will be capable of performing. 8 sec/200mph??
I'm hoping that it will be the fastest street legal 1/4 mile Boss Hoss in the country, and very curious to know what kind of times and speed it will be capable of performing. 8 sec/200mph??
Why so many RPM's? 7k-7500 is plenty enough to make the power you need. Also its alot easier on the parts to. Also if your going with alot of nitrous then you better get a custom cam built for your mods.
Wow and people think I'm crazy for wanting to put a similar setup in a 2500lb car. Honestly man you are crazy. Talk about excess but hey I guess its fun while it lasts. All of your goals are achievable but spinning to 8K would work against the goal of keeping it reliable. I am sure in race trim an ls1 would push 8k or more no problem but we all know those motors arent doing 100k miles. If I were you and you really wanted to spin that motor, I'de destroke it and that should help you get that 8k reliable screamer.
I'm also with the above poster btw. Ride it first and see if you need the nitrous. Having the back end of a car fishtailing at 100mph is one thing having the back end of a motorcyle fishtailing even harder at 100+ mph is quite another.
I'm also with the above poster btw. Ride it first and see if you need the nitrous. Having the back end of a car fishtailing at 100mph is one thing having the back end of a motorcyle fishtailing even harder at 100+ mph is quite another.
Thread Starter
Teching In
Joined: May 2008
Posts: 16
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From: Lake Arthur, Louisiana
There are several reasons for wanting 8000rpm. The bike has 2 forward gears, of which the 2nd is designed as overdrive, not for "hot-*******". The powerglide type tranny is the weak link on the bike.
You can do whatever you want in first, and assuming that the 2008 LS2 bike is geared the same as my 2007 zz4 350 Boss Hoss, it will allow me to get...
130mph @ 6000 rpm redline with zz4 350
173mph @ 8000 rpm redline with LS2
195mph @ 9000 rpm(I'm allowed to dream)
Basically, when confronted with a turbo Suzuki Hyabusa, etc, I want to take no prisoners by not having to shift.
Also, I plan to run the bike at the track and don't want to redline before reaching the 1/4 mile; don't want to shift to second.
There are quite a few Boss Hoss's running around with 605/632 cu.in. Merlin's, one of which I saw in Sturgis sporting NOS and just over 1100hp. Impressive, it shakes the ground. As impressive as that is, they are most likely limited to 6000rpm.
Basically, 8000rpm will allow me to "Stomp some *ss".
You can do whatever you want in first, and assuming that the 2008 LS2 bike is geared the same as my 2007 zz4 350 Boss Hoss, it will allow me to get...
130mph @ 6000 rpm redline with zz4 350
173mph @ 8000 rpm redline with LS2
195mph @ 9000 rpm(I'm allowed to dream)
Basically, when confronted with a turbo Suzuki Hyabusa, etc, I want to take no prisoners by not having to shift.
Also, I plan to run the bike at the track and don't want to redline before reaching the 1/4 mile; don't want to shift to second.
There are quite a few Boss Hoss's running around with 605/632 cu.in. Merlin's, one of which I saw in Sturgis sporting NOS and just over 1100hp. Impressive, it shakes the ground. As impressive as that is, they are most likely limited to 6000rpm.
Basically, 8000rpm will allow me to "Stomp some *ss".