Anyone with ysi or cogs, please step in
Thread Starter
Registered User
Joined: Sep 2005
Posts: 983
From: Motor City
its a 36mm polychain set up, 78/30 i'm seeing 25lbs or so, kina hard to watch the boost gauge while holding on 
, i made 4 passes last friday with no issues, only got one decent pass off, tried to leave on T/B 12psi or so, blew the tires off, let off got back in it, shifted from 1st to 3rd
ratchet shifter went out of adjustment, and ended up with 10.26@143mph with a 1.91 60ft, i'll be at the track today see what she can pick up with actually hitting 2nd gear this time and a little better 60ft.
, i made 4 passes last friday with no issues, only got one decent pass off, tried to leave on T/B 12psi or so, blew the tires off, let off got back in it, shifted from 1st to 3rd ratchet shifter went out of adjustment, and ended up with 10.26@143mph with a 1.91 60ft, i'll be at the track today see what she can pick up with actually hitting 2nd gear this time and a little better 60ft.
I honestly wonder if it could be the Mondo Bypass either leaking boost off or not closing quick enough due to the fact that I have to shift being a 6speed
At what rpm are you seeing that boost? About what rpm do you usually make about 10-11 psi at? Also good luck today, I cant wait to see how you run
Last edited by cjmatt; Oct 12, 2007 at 01:49 PM.
Registered User
Joined: Aug 2006
Posts: 43
Do not use cogs on a street car. A 12-rib will almost certainly transmit the needed power to drive the blower with FAR less hassle and expense. Cog belts break, strip, or roll off the pulleys unless they are perfectly aligned, very rigidly mounted and most of all not constantly subjected to loading and unloading. It's not easy to get them to work on a track car, let alone a street car.
Rich
Rich
12 rib is as good as it gets for the street, enjoy.
Registered User
Joined: Feb 2001
Posts: 946
From: Lees Summit, MO
Any post that does not agree with the above statement is incorrect. If you have worked with a cog set-up and aren't just spewing what you've read, you'd know that the stop and go nature of street driving will not work with a cog set-up period.
12 rib is as good as it gets for the street, enjoy.
12 rib is as good as it gets for the street, enjoy.
Registered User
Joined: Jul 2004
Posts: 337
From: GERMANTOWN, MARYLAND
no luck last night, got 3 passes, first pass tried to leave at 5-7lbs with the t brake and blew the tires off, got off it, got back in it ended up almost crossing the middle, short shifted into 2nd shut down and hit the brakes hard 10.78@100mph. 6.8@111mph a1/8th with a 1.66 60ft, blew the tires off about 90-110 feet out. second pass was simular but i didnt short shift into 2nd and when i did shift it blew the intake pipe off(yes i'm using tbolt clamps), 3rd pass was the same as 2nd. I called it a night. Heading up to the track tomorow hopfully with better results, did some more suspension tunning, but i honestly dont think with my suspension the Hoosier 28s drag radials arent up to the task, i know people been fast on these but i've had no luck so far, so if stuff dosent work out tomorow i'm getting a set of full slicks. CJmatt the cam is at 110lsa, so in stupid land that isnt the blower cam, but fastest lt1 blown cars run 110lsa or lower and thats a fact, and i'm talking about fastest 1/4 mile cars not dyno queens.
Last edited by LittleRedZ; Oct 13, 2007 at 08:47 PM.
Registered User
Joined: Jul 2004
Posts: 337
From: GERMANTOWN, MARYLAND
Any post that does not agree with the above statement is incorrect. If you have worked with a cog set-up and aren't just spewing what you've read, you'd know that the stop and go nature of street driving will not work with a cog set-up period.
12 rib is as good as it gets for the street, enjoy.
12 rib is as good as it gets for the street, enjoy.
Moderator
Joined: Dec 1969
Posts: 10,745
From: Buffalo, New York
There is a lot of experience to the contrary. YMMV. From your sig it seems you had an auto tranny, which helps. I also somehow doubt it saw a lot of street miles with a spool?
Rich
Registered User
Joined: Sep 2002
Posts: 1,942
From: kitchener/Ontario
Registered User
Joined: Sep 2002
Posts: 1,942
From: kitchener/Ontario
don't you have anything good the say about cogs ? you are around a speed shop all the time there has to be some kind of positive feed back you can give....
Registered User
Joined: Jul 2004
Posts: 337
From: GERMANTOWN, MARYLAND
made it out today to a higher elevation track, that is usually .2 and 2mph slower, still need to get the car back on the dyno next week, its braking up bad up top(way to rich) making me miss about 5psi, short shifting every gear i still managed a 9.94@141mph with a 1.50 60ft.
Moderator
Joined: Dec 1969
Posts: 10,745
From: Buffalo, New York
Cogs can transmit more power than a comparable width ribbed belt and do not stress the crank snout - the main disadvantge to a street setup with a ribbed belt. But IMNSHO cogs are NOT what you want on a street car. Too much breakage, too difficult to set up, and not needed. A properly setup 12-rib will transmit the needed power w/o breaking crank snouts (if it's a good crank). But hey, I won't be mad it you decide to try cogs. And if you have an automatic it may work out.
The belt you need will depend on the pulleys used. Another disadvantge to cogs is the limited lengths available. It may not be possible to run certain pulley combinations with the available belts. Custom length belts can be had at a HUGE price.
Best of luck.
Rich
The belt you need will depend on the pulleys used. Another disadvantge to cogs is the limited lengths available. It may not be possible to run certain pulley combinations with the available belts. Custom length belts can be had at a HUGE price.
Best of luck.
Rich
Thread Starter
Registered User
Joined: Sep 2005
Posts: 983
From: Motor City
Cogs can transmit more power than a comparable width ribbed belt and do not stress the crank snout - the main disadvantge to a street setup with a ribbed belt. But IMNSHO cogs are NOT what you want on a street car. Too much breakage, too difficult to set up, and not needed. A properly setup 12-rib will transmit the needed power w/o breaking crank snouts (if it's a good crank). But hey, I won't be mad it you decide to try cogs. And if you have an automatic it may work out.
The belt you need will depend on the pulleys used. Another disadvantge to cogs is the limited lengths available. It may not be possible to run certain pulley combinations with the available belts. Custom length belts can be had at a HUGE price.
Best of luck.
Rich
The belt you need will depend on the pulleys used. Another disadvantge to cogs is the limited lengths available. It may not be possible to run certain pulley combinations with the available belts. Custom length belts can be had at a HUGE price.
Best of luck.
Rich
LITTLEREDZ, what are you shifting at?