Macius8

iTrader: (3)

is the racing beat pipe out yet?

Jon316G

iTrader: (1)

Yes.
Only a handful of people have it right now because they pre-ordered it.

Rocketman1976

The Racing Beat fits better and probably cost less than what the Mazsport did as well... Wasn't it like $500 or something like that? I miss their motor mounts though

My Agency Power catless dual resonated midpipe fits perfect and the O2 sensors were fine, but it is loud as hell! The pictures of it on the website don't show the dual resonators but it has them.
Nice flame show with it...
http://www.youtube.com/watch?v=yTCJZLFc9Po

olddragger

iTrader: (3)

are you installing the secondary o2 sensor? The front sensor is unchanged---to the header.
I have to ask why are you using the secondary sensor? It does nothing except monitor the cat's effecentcy doesnt it?
I didnt use the secondary o2 sensor and i used the power source for it to go to my innovate a/f sensor--worked great--its not a switched source.

Rote 8 is tha WINNER!!!!!!
Except I used a twisted steel cable with clamps. It works pretty dogone good--i am starting a thread in the tech section on this. I dont think homemade poly mounts will work well.
OD

JMKuco

any dyno now ??
the hp gain may be impressive

Rote8

BTW:
When changing the crank pulley, if it only fits two bolts out of the six.
Take the two bolts out and rotate the pulley 180 degrees.
(I fought it for 45 minutes before realizing that one.)

olddragger

iTrader: (3)

that sounds like something that would happen to me also--txs--hope it is here by friday or Monday.
But i want to install my lim at the same time I do this.
OD

Rote8

Wish I lived further North.
The pulley is a breeze.
Injectors are easier the second time.

Macius8

iTrader: (3)

Where can I get the belt for the sc? Mine's in bad shape I read it somewhere on this thread but cant find it now.
thanks

Race Roots

iTrader: (64)

Goodyear Gator Back Belt

4050325

Rote8

4050325 - Goodyear Gator Back Belt is correct for the stock Pettit pulley.
The larger (high boost) pulley needs an inch longer belt..
4050325 - Goodyear Gator Back Belt

Summit Racing keeps them in stock.
My local AutoZone now carries these belts.

Phil's 8

iTrader: (3)

Am I seeing the same belt number or missing something? Is there a number on the longer belt?

Red Devil

If someone wouldn't mind answering, what are the diameters of the two eccentric shaft pulleys? The larger one is exactly 5", correct? And the low boost diameter?

olddragger

iTrader: (3)

Cam told me that the same belt can be used for the bigger pulley --just adjust it out with the idler pully?
OD

Rote8

Here is "some more numbers"

http://www.summitracing.com/parts/GTR-4050325/

http://www.summitracing.com/parts/GTR-4050335/

Rote8

I tried.
I even removed the idler pulley, but could not get the smaller belt installed.
Give it a shot.

Figure the circumference for each pulley:
3.141592653589793 x 4.5 = 14.137166941
3.141592653589793 x 5 = 15.707963268

Subtract the smaller pulley circumference from the larger circumference
15.707963268 - 14.137166941 = 1.570796327

I am guessing the belt is in contact with 3/4 of the pulley.
1.570796327 x .75 = 1.178097245

So, about 1.2 inches larger belt.

Hymee

iTrader: (1)

If the belt is 1 inch longer, then looking at their number system, I'd say you would be looking for a 4050345.

I.e. http://www.summitracing.com/search/?...=4050345&dds=1

Cheers,
Hymee.

Rote8

Uh, no.
You want the two listed here.
Small pulley gets a 32.5 inch
Large pulley gets a 33.5 inch

Links to the correct belts on Summit Racing:

http://www.summitracing.com/parts/GTR-4050325/

http://www.summitracing.com/parts/GTR-4050335/

Rote8

Does anyone use "belt dressing" on their supercharger belt?
Is this like Mastodon repellent?

Rocketman1976

Does anyone know if we could run 14-16 psi with race fuel or methanol with the Pettit? I haven't seen anyone really push the limits yet. I'm curious if it could make 350 rwhp since we've seen people with 327-330 with 12 psi.

Rotr8

iTrader: (2)

Boost has nothing to do race fuel or meth, it has to do with the performance ceiling of the blower and its rev limits combined with the ratio from the pulleys...
The bigger pulley puts the blower very near its limits, and everyone with the kit wants to maintain reliability not see how many engines they can blow...

Rocketman1976

Lol, thanks. Everyone gets such attitudes on here. Point has been understood though, so 13 psi must be the max efficient psi because I think I saw a few that run that.

It is a pretty good sized sc being larger than our motor at 1.7 liters so I thought maybe it would be capable of a little higher psi and with the help of higher octane fuel to avoid detonation so as not to destroy our motors, thanks.

Rotr8

iTrader: (2)

No body has an attitude if you cant openly discuss your question dont ask it,,,

you have about 4-5 Pettit kits near you go for a ride and see if it meets your needs and expectations all the owners in your area are more than willing to take you for a ride...

olddragger

iTrader: (3)

yep-- the engine is a 1.3 but it moves air like a 2.6. Arent most people seeing less than 12lbs with the big pulley?
I am a little Leary of going over 10-11 myself--remember we have a 10-1 compression ratio to begin with.
the 4 port engine with the kit are seeing 14-16 lbs i think.
at the hp you are speaking about I think you will also run out of maf and you would have to rescale a good bit.
then drivetrane weakness's will start showing--the motor mounts are already starting.
olddragger

Macius8

iTrader: (3)

Finally took her for a little drive today, but havent gone past 6k rpm. The throttle seems much less responsive, any clue why might that be? In neutral there's a slight delay when pressing the gas pedal and the engine responding. There's also a slight hissing sound during that delay. Will look at the logs before I take it to redline but any suggestions appreciated.