Hi Scott,
on the v-stack issue, i read your post with some interest.
i had actually been under the (obviously) mistaken idea that longer stacks
would make better torque.
you might remember that i'm the guy that has been running
trimmed 4" stock v-stacks inside the stg.7 indiv. filters.
anyway your report got me to wondering....... since i had an
extra set of stacks i went out and cut a set 2" taller than the top of the
carb flange,stuck them in the filters and went for a ride.
AMAZING!! if i lost anything on HP i'm sure that only a dyno
could tell BUT the diff. in torque was noticable right off idle and at
1500rpm in 5th. the real big diff. was on hard accel. through the gears. the
thing is scarry now. thanks for the tip!!
steve #1131
>From: [EMAIL PROTECTED]
>Reply-To: [EMAIL PROTECTED]
>To: V-MAX TECH LIST <[EMAIL PROTECTED]>
>Subject: Re: VGAS
>Date: Sat, 8 Jul 2000 12:58:00 EDT
>
>I beg to differ. On the issue of the velocity stacks, you can change the
>hp
>torge curve by changing the lenght of the stack. My bike makes 131.8 and
>86
>lb/ft of torque with the 4" stacks. With the 2" it makes 129.8 and 88.7
>lb/ft of torque. Some bike do loose a little in the mid range but mine did
>not. I has no dip at all. You now have clean cool air running that is not
>muddied up by a tank cover running through a match ported, polished
>manifold. I sent my dyno run to Terry Hayden a couple days ago so you
>should
>all be able to see it soon. You are also going from a 35mm carb to a 39mm.
>There is no vboost at all on the VGAS system either and it does include the
>filtering bonnets that go over the stacks.
>
>I had the luxury if you call it that of trying to beat out Stan P. numbers.
>Stan(as far as I know) has the highest HP stock VMAX retaining the air box
>around. With a stage 1 setup and a Hindle pipe his bike makes almost 127
>hp.
> It has unbelievable mid range too. Even with VGAS on my bike, Stans bike
>makes 2-4 more hp than mine up to about 5500 rpm and then mine pulls away
>by
>about 6 hp till redline. Stan's bike is unbelievable strong very much the
>exception not the rule. Although it was never dynoed stock I feel fairly
>sure that it would have made 118-120 before any mods.
>
>I had the same hesitation on VGAS when I first read about it. Now I have
>it
>and I am a believer.
>
>Scott
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