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Big Block Talk! Everything about swapping a big block engine into your cart! |
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05-19-2013, 12:51 PM | #11 |
Vegas modded 420
Join Date: Jun 2009
Location: West MI
Posts: 15,433
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Re: 18hp V-Twin need more power
You tire size is your gearing, unless you do HS gears.
The issue I see with some BB engines is the stock clutch might shift out at 3500-4K range (typical for golf carts, WOT rpm) and if your governor on the BB is 3600rpm (standard for lawn engines) it starts to cut power before that. See what can happen? That is why a stock cart has no governor on the engine only on the trans for ground speed. Some have a limiter in the ignition. Usually you can tweak the governor on the BB to run 4K rpm that might help you out, or you are not getting full power. The clutch must shift at rpm below where the governor starts to cut throttle....or raise the governor rpm. With a rev kit you can run up to 6K on a vanguard, so many remove the governor and run a rev kit. Your top speed is a matter or gearing and tire diameter, and of course engine rpm, but you don't want to run roads at 6K rpm either you should get HS gears for that. 6K rpm is only for a quick blast unless you build up the engine. They still have max power at 3500-4500rpm with the stock cam, so remember that and get the clutch to shift accordingly. |
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05-19-2013, 05:50 PM | #12 | |
Gone Wild
Join Date: Aug 2010
Location: Port Wentworth, GA
Posts: 247
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Re: 18hp V-Twin need more power
Quote:
I just returned from the CAW Spring Trail Ride, and I had no trouble climbing hills. I went on some nasty trails, dry and muddy, and my cart pulled hard without ever going over 3,500 RPM. Since my cart is used mostly off-road I'm not concerned with top speed. It's fun to make a fast pass every once in a while, but I prefer riding off-road. |
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05-19-2013, 05:56 PM | #13 | |
Gone Wild
Join Date: Aug 2010
Location: Port Wentworth, GA
Posts: 247
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Re: 18hp V-Twin need more power
Quote:
I'm running 26" tires on 10" wheels, but they are Super Swamper Vampires and have tall lugs. My brother thinks my top speed comes from having tall tires because he thinks ez-go installed lower gearing in the workhorses. My brother has a TXT with the original factory rear end. His engine is the same as mine except he installed the performance cam from CPP. His tires are 23" Saharas on 14" wheels and he can run much faster than me. We know the performance cam makes a huge difference, but are curious about the rear axle gearing. |
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05-20-2013, 06:56 AM | #14 |
Not Yet Wild
Join Date: Mar 2013
Location: Vanuatu
Posts: 20
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Re: 18hp V-Twin need more power
CART-ZILLA, close mate but should be: Gidday mate, how are they hangin?
ello is Pommy(England) Thanks everyone for the great info so far. I am really enjoying learning all of this stuff.The Governor does not seem to have anything external hooked up to it. Is that normal? I am trying to post a photo of the Governor but it is not very clear. |
05-20-2013, 05:28 PM | #15 | |
Gone Wild
Join Date: May 2011
Location: Pickens/Dacusville s.c.
Posts: 1,386
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Re: 18hp V-Twin need more power
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05-20-2013, 06:06 PM | #16 | |
Gone Wild
Join Date: Jul 2012
Location: Stuart, Fla
Posts: 205
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Re: 18hp V-Twin need more power
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05-21-2013, 07:16 AM | #17 |
Gone Wild
Join Date: Dec 2007
Posts: 160
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Re: 18hp V-Twin need more power
If it was my 18hp, looking for more low end pwr, I would install the advance key, remove the gov, per the sticky, and advance your stock cam one tooth. I would install the rev kit, If you felt like you were not going to build it any more. If you think you might, go for the new springs. When you do the rev kit, depending on how old your motor is, make sure you have the purple valve springs. They are the stiffest single springs made by briggs. If you need a set, I have some that I will send. When you remove the gov, and the crap that goes with it you will also kill the compression release, so make sure your starting system is in order. Good, thick cables, and good connections, or sometimes you will be turning the motor off the compression stroke by hand to start. Do you have a free flowing exhaust? A stock 18, with a rev kit, tuned right, will scoot!
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05-21-2013, 09:45 AM | #18 | |
Gone Wild
Join Date: Aug 2010
Location: Port Wentworth, GA
Posts: 247
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Re: 18hp V-Twin need more power
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My cart runs great now, just wondering how to get more speed without changing the cam. The rev-kit, high compression head gaskets and bypassing the gov in the rear end really made my cart come alive. Just seems like I should be getting more speed. The engine has very low hours and is running excellent now so it seems there could be something else to work on for more speed. |
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05-21-2013, 10:14 AM | #19 | |
REAL MEN GET EM DIRTY
Join Date: Jun 2009
Location: rincon , ga.
Posts: 3,646
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Re: 18hp V-Twin need more power
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05-21-2013, 11:14 AM | #20 | |
Gone Wild
Join Date: Aug 2009
Location: Santuck,Al
Posts: 1,747
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Re: 18hp V-Twin need more power
Quote:
I agree with blake80 here,I've got one of CPP's 18HP BB kits in my 2001 workhorse 1200 that I put a 1999 TXT rear under and it will GPS @ 40+ mph on flat pavement but even with the long travel frontend & other upgrades it has it still gets very "loose" and feels unsafe if you will at higher speeds. |
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