I just installed a browntop ZC with 94 CBR 900RR carb and I thought I was getting dicent preformanc untile my budy beat me with a stock Pontiac Prusit that does 1/4 mile in 16.1 seconds this was really dissapointing any ideas of what it could be.
1
Not Getting The Power I Should
Started by jay_1gen, Jul 05 2007 06:11 PM
15 replies to this topic
#1
Posted 05 July 2007 - 06:11 PM
#2
Posted 06 July 2007 - 01:28 AM
#3
Posted 06 July 2007 - 05:14 AM
ahh yeah if its a stock engine on both parts then i wouldnt be wondering why
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#4
Posted 06 July 2007 - 08:45 AM
#5
Posted 06 July 2007 - 11:28 PM
#6
Posted 07 July 2007 - 12:37 AM
I would say its the carbs. I'm no carb guy(although I do tinker with bike carbs on BIKES), but I read on here the people that use bike carbs and most tend to be unsuccessful or unhappy with the end results. JUST MY THEORY.
#7
Posted 07 July 2007 - 12:39 AM
QUOTE (jay_1gen @ Jul 5 2007, 06:11 PM) <{POST_SNAPBACK}>
I just installed a browntop ZC with 94 CBR 900RR carb and I thought I was getting dicent preformanc untile my budy beat me with a stock Pontiac Prusit that does 1/4 mile in 16.1 seconds this was really dissapointing any ideas of what it could be.
You wouldn't happen to have 17" wheels, would you?
#8
Posted 07 July 2007 - 12:48 AM
QUOTE (RARECRX @ Jul 6 2007, 11:37 PM) <{POST_SNAPBACK}>
I would say its the carbs. I'm no carb guy(although I do tinker with bike carbs on BIKES), but I read on here the people that use bike carbs and most tend to be unsuccessful or unhappy with the end results. JUST MY THEORY.
lo this is so true ,i had 2 diffrent sets and one ran like crap and the other didnt even sputter or anyhting waste of $250 all together
seriously though talk to Kurt he has the same set up ,the zc with the 900's (IIRC) and has been driving his hatch and as been tning his
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#9
Posted 07 July 2007 - 01:16 PM
Thanx for the help guys I do think its all in the tuning, I couldn't see why I wouldn't get the same as the stock ZC i've got more tunabilaty then a EFI engine and i'm able to get more fuel in the motor. As for tires i'm runing 195/50 VR 15 don't know if that would afect me that much.
#10
Posted 07 July 2007 - 10:26 PM
have you tuned the carbs at all or are they still tuned for the bike?
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#11
Posted 07 July 2007 - 11:09 PM
QUOTE (stevo911_ @ Jul 7 2007, 11:26 PM) <{POST_SNAPBACK}>
have you tuned the carbs at all or are they still tuned for the bike?
hey when he hits 12-14,000 rpm it should smooth out a bit....try a higher shift point.............um,and earplugs......and,...er,safety glasses and ear plugs
*ducks*
oh yeah,faster AND furious..Heh Heh Heh
better to be thought the fool..
rather then to open one's mouth and confirm it
use may include risk factors these include;anal leakage,oily discharge,copious flatulence,bloating,incontinence,erectile dysfunction,body rejecting genitals,a racing or severely diminished heart rate/including death. discontinue use if health insurance ends,or patient turns blue and doctor leaves after declaring patient has died...your results may vary
better to be thought the fool..
rather then to open one's mouth and confirm it
use may include risk factors these include;anal leakage,oily discharge,copious flatulence,bloating,incontinence,erectile dysfunction,body rejecting genitals,a racing or severely diminished heart rate/including death. discontinue use if health insurance ends,or patient turns blue and doctor leaves after declaring patient has died...your results may vary
#12
Posted 08 July 2007 - 02:29 AM
QUOTE (nature223 @ Jul 8 2007, 12:09 AM) <{POST_SNAPBACK}>
hey when he hits 12-14,000 rpm it should smooth out a bit....try a higher shift point.............um,and earplugs......and,...er,safety glasses and ear plugs
*ducks*
*ducks*
hahaha that's hilarious
but yeah tuning will be your best friend... and biggest time consumer for a while... you can get as much fuel as you want into the motor but if it's not in the correct ratio with the air you're getting it's not going to do anything for you except hurt perf and lower your mileage.
Ay!
Ay, dog, ay!
You stepped on my sneaker meng!
Ay, dog, ay!
You stepped on my sneaker meng!
#13
Posted 09 July 2007 - 01:58 PM
Thanx for the help guys I found my problem I needed bigger main jets and man does she develope power now I raced my freind that has a Cobalt SS stage 2, he does 14.2 on quarter mile and I was really not to far behind, as for the Prusuit I blew him out of the water the car is nuts now I just have to find the perfect jetting.
#14
Posted 10 July 2007 - 12:33 AM
did you use a wideband to tune? what kind of fuel pressure are you running and with what pump
I have...had 98(i think) cbr 900rr carbs on my EW1 DX motor--- untuned with the stock fuel pump it ran like a bat out of hell
I have...had 98(i think) cbr 900rr carbs on my EW1 DX motor--- untuned with the stock fuel pump it ran like a bat out of hell
He who dies with the most toys, wins.
#15
Posted 10 July 2007 - 09:20 AM
No I didn't use a wideband to tune I'm using spark plug colors. As for fuel pressure I run 3 PSI at idle and I go up to about 5 PSI under acceleration thats what the carb use stock. Did you ever check the 1/4 mile time tho? It feels fast but it really isen't with the unjetted system.