60' and ET improvement with slicks?

[Deuce]

Have you ever ran a bike? That's how you launch a bike.

My Harley has been down the strip close to 200 times. (won C6 track series last season)
no Tacho on it, but around 3-4k rpm launch, 2 stage the clutch release (about 70% / 30%).
weighs 295kg dry (plus fluids, pilot and gear). 100% clutch = about 1.5foot of air under the front wheel. Street tyre on the rear, 170/60-17 at about 16-18psi cold.

I think I have set rev limit to 6150.
I couldn't imagine launching at 6000rpm with out a wheelie bar. And even then it would lift the front, lean on the wheelie bar and spin the tyre all at the same time, LOL

 

[AirStrike]

My Harley has been down the strip close to 200 times. (won C6 track series last season)
no Tacho on it, but around 3-4k rpm launch, 2 stage the clutch release (about 70% / 30%).
weighs 295kg dry (plus fluids, pilot and gear). 100% clutch = about 1.5foot of air under the front wheel. Street tyre on the rear, 170/60-17 at about 16-18psi cold.

I think I have set rev limit to 6150.
I couldn't imagine launching at 6000rpm with out a wheelie bar. And even then it would lift the front, lean on the wheelie bar and spin the tyre all at the same time, LOL

Harley and a Jap bike are two totally different things. 6000rpm is nothing on a bike spinning over 15,000rpm.

 

[Deuce]

Harley and a Jap bike are two totally different things. 6000rpm is nothing on a bike spinning over 15,000rpm.

I know, but the statement did say 'a bike' instead of 'a sport bike' so was fair game.
15,000rpm seems a bit high? maybe 10k or maybe 12, but surely not 15. (I might have to ask a few people and get back to you, I have a mate with lowered & turbo-ed Hayabusa, he might now)

edit: Just spoke to my mate, his is at 12,500. Therefore 6K launch ain't so high after all.

 

[na3point8]

Just ran 13.19 @ 104.8mph. With bigger burnout it gripped and bogged no matter how hard i launched. Little burnout and maybe slipperier outside lane at willowbank?? bit of wheel spin off the line and no bogging down. That helped et's, but 60ft stayed 1.9 all night. Dyno'd 263rwhp which is backed up by the mph, runs faster than others with 290rwhp.

You considered more comp and cam? .470 total isn't much further than stock.

 

[Jack_vs_BT1]

Comp is around 11:1 which is plenty enough and I'm not going to spend money getting 1mm extra lift when my PTV is already very close when I can just jet another 50hp of nitrous into it, I have over size valves already so less lift and more flow it will go high 13s with a tune, ETs without gas and low 13s with gas, those times are suspect, you're only passing the trap at 104mph with 290hp I've passed it at 100mph with a lot less than that

 

[na3point8]

Just ran 13.19 @ 104.8mph. With bigger burnout it gripped and bogged no matter how hard i launched. Little burnout and maybe slipperier outside lane at willowbank?? bit of wheel spin off the line and no bogging down. That helped et's, but 60ft stayed 1.9 all night. Dyno'd 263rwhp which is backed up by the mph, runs faster than others with 290rwhp.

You considered more comp and cam? .470 total isn't much further than stock.

Read it again mate, ran 104.8mph with 263rwhp. Ran a bit over 100mph when i had 247rwhp. There are others on here claiming 291rwhp but only runs 103mph. That PTV doesn't sound right man, i had a 230 @ 50/.600 lift in a stroker motor with plenty of clearance, just saying. 212/212 .470 with 11:1 comp sounds a little bit mismatched. I was gonna take your advice and look into fitting NoS but i've just discovered how much refills are atm, DRUG MONEY!

 

[Jack_vs_BT1]

That makes sense haha I'm only paying $140 for a refill ATM and I'm running flat tops with a 60tho decked off the heads and the block plus the oversized valves have a bigger radius and protrude into the cylinder a fair but more than stock valves, going in for a dyno tune soon so I'll get some figures

 

[na3point8]

I think you'll find they're dish pistons, flat tops dont work in VN-VR V6 unless your chasing 16:1 compression, they have tiny 35-37cc chambers remember. You won't be anywhere near close to PTV, i dont know where you're getting you info but it's all wrong. That cam is a regrind on a stock cam for a 'near' stock engine, your giving up 30hp+ easy by not fitting something decent, honestly cam it up before you get a tune.

I'd never go to the drags if it cost me an extra 140bucks, i'll stick with my $45 entry and $25 of e85 and whatever a hot chips costs there lol

 

[mr j-man]

I think you'll find they're dish pistons, flat tops dont work in VN-VR V6 unless your chasing 16:1 compression, they have tiny 35-37cc chambers remember. You won't be anywhere near close to PTV, i dont know where you're getting you info but it's all wrong. That cam is a regrind on a stock cam for a 'near' stock engine, your giving up 30hp+ easy by not fitting something decent, honestly cam it up before you get a tune.

I'd never go to the drags if it cost me an extra 140bucks, i'll stick with my $45 entry and $25 of e85 and whatever a hot chips costs there lol

where do u run mate?

 

[Jack_vs_BT1]

It's plenty quick enough for a daily, 2.5mm dish with 120thou off the heads and block combined on 98 with 167rwkw without gas on an average tune, it will dip into high 12s with a tune, 100 shot gas and slicks and it's still a daily hahaha a stupid big cam is no good on the street, how often do you drive it over 3k where the cam comes into it's efficiency band? For me, not often enough to warrant putting a cam bigger than [email protected]

Your times don't add up, low 13s for 7 MPH faster than mine goes that's 1.6 seconds quicker, allow .6 for slicks being that's still around a second from 7 MPH

After driving with nitrous $140 is nothing for the power you get out of it, will smash tyres off rolling in 3rd no problems