ZYA_LTR

I'll look into the possibilities on obtaining 8 rib belts, I work at a shop here by Detroit,MI, and we specialize in F/I, there is a shop that stocks/orders goofy size serpentine belts just for us, i'll have to check the stock length belt, and i am definetely interested in the pulley's, i'll have to figure out the size i want, and as too the question why a larger crank pulley you could think of it this way....underdrive pulley's are smaller to spin the accessories slower, soooo a larger crank pulley would spin the other pulley(The Blower) at a faster speed, which would then need to be taken into consideration when doing all of this up, you would either need to make multiple sizes of both pulley's, or have everyone decide on one crank size, and just make multiple blower pulley's. I would look into it, unless it is no trouble to make two sized crank pulley's, either way if you make several size blower pulley's, and several people order, prices would drop, and people could just buy a couple of blower pulley's to play with.

Jason

ZYA_LTR

CAMAROGOD i'm not sure i could get you three, but i could probably get you a whole set of 38 lb injectors, and then we could work something out for the pulley's, i got a set of the same 38's on my car and they work awesome! Email me and let me know what you wanna do.

Jason

By the way, where exactly in MI are you? i'm 20 mins outsid edetroit.

camarogod98

iTrader: (8)

I already bid on a set of 4 injectors on ebay. how much can you get them for?

ATMER

How about an 8 rib setup for a C5 Vette?
As for belts, try Whipplesupercharger.com.
They have belts from 20" up in 1" increments and any number of ribs. Kinda expensive though, but their probably the only game in town.

Black LS1 T/A

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">BlackLS1T/A,
how much did ati charge you for the new crank pulley and also the idler? I will have pictures of the idlers buy friday for you to inspect. I just need to figure out were i can host the pictures on the net easily.</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I can host your pics for ya.

Don't make steel pullies except for the idler pulley. The anodized aluminum for the regular pullies hold up fine. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

I got the pullies replaced under warranty. ATI charged me $100.00 deposit, plus shipping, until I return the Crank pulley. They just gave me the idler pulley.

I'd be interested in an 8-rib set. I have a feeling this motor may not let the belt stay on a 6-rib setup. It already slips quite a bit unless I tighten the heck out of it. Also, one reason I am going back to the 4.10" pulley is the greater surface area should keep it from slipping so badly.

Black LS1 T/A

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 1slowCamaro:
<strong>I want to know what the point is for having a 7.5" crank pulley. ?????? Is it for more belt contact area? Or is this for spinning the blower faster? My guess would be to spin the blower faster but I think they would both be benefits.
Justin</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">1. Larger crank pulley means faster spin for the SC pulley, which means more boost. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

2. More surface area means less slippage.

Also, that means the SC pulley does not have to be so small to increase the speed of the SC (for more boost).

So your thinking is correct. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

JAS

Why the 7.5" [7.5" crank will max out an ATI blower (62,461RPM) at at 6500RPM (engine) with a 3.2" blower pulley.]

So why/how did I come up with 7.5"
- For what you guys call (10psi) boost, with a 7.5" you would use a 4.1" blower pulley. You would have maximum belt contact even with a 6-rib version.
- Guys that are interested and have all their ducks in a row (fueling, engine, etc) can use the FULL benefit of their ATI blower unit. (12psi+) 3.2" blower pulley
- Reving kills engines, transmissions, etc. Not interested in saying I had to rev to 6500rpm to get 10psi. I want to keep STOCK shift points.
- Injector accuracy and time for fuel delivery accuracy over 6K is another reason, etc.. etc..
- I have a heavy raceweight (3650lb), I can use way more torque down low then a screaming top end.

You guys realize that a 3.2" blower pulley with a 6" crank making ~ 10psi at 6500rpm (engine) is ONLY spinning the ATI blower 49,969 RPM? That is 12,031 rpm left before you begin to over spin the blower. This is a big blower guys (compared to what the guys that buy LS1 VORTECH's get), I never understood why you guys all upgrade to the D-1's when you don't even use the full potential of the regular P-1's.

I would rather use the full potential of my P-1 and benefit from the better torque down low (& HP) and try to keep the belt from slipping.

With a 7.5" crank and 3.2" blower pulley, I would achieve 49,969rpm (blower) by 5200rpm instead of 6500rpm (6"/3.2").

Actually, a 7.5" crank and 3.6" blower pulley would be ideal for a 5800-6000rpm shift point. AT 5800rpm, the blower rpm would be 49,542rpm.

Any thoughts, errors, corrections, comments?

Heck, I'll definitely take a balanced steel idler. Maybe make the idler a little wider so when I upgrade to 8 rib, I won't have to replace it. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

2 concerns
1) blower offset spacing change needed for 8 rib???
2) I hope you anodize the aluminum pullies and check balance
3) belt availability

Another thought, I would like to see a 7.5" crank pulley that will bolt up to an ATI (not the blower company) LS1 balancer. This would be great and similar to what the Vortech guys have. I hate the LONGER bolt method and hate the fact that ATI doesn't give us the right length bolt to begin with. Nice blowers, but the rest of the system could be tons better.

JAS

ZYA_LTR

6" Crank / _____ Blower = ~ 7.5" Crank / ____ Blower
4.1" = ~ 5.13"
3.4" = 4.25"
3.2" = 4"
.
.
.
2.56" = 3.2" <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

ZYA_LTR

CAMAROGOD, i should be able to get you a whole set of injectors for between $200/300, i paid $250 for mine the last time my guy had any, and it's safer to buy a whole set together, so that they are flowing the same, and are the same age, mix and match injectors, ecspecially if they are not from the same brand or batch, is like putting some delco, and some ngk spark plugs in your car.

Jason

Lemme know if your interested, i will be able to call my guy on tuesday evening, maybe monday, to see if he has any available.

camarogod98

iTrader: (8)

I already got a set of three injectors on ebay. It really dosent matter if they dont flow exactly the same because there just going to be dumping fuel in the throttle body instead of having one in each cylinder. Thanks though

I dont see any point in having the idlers balanced. all the diameters are going to be turned together so the concentricty will be perfect as will the balance. As for the anodizing, Im still looking into sources for that and cost. Im really not sure what the 8 rib setup is going to cost because of anodizing and the salty cost of 7.750 bar stock 6061 aluminum. I should have it figured out in about a week.

later,

Jay H.

camarogod98

iTrader: (8)

guys ive got a picture of one of my pullies up. its a 3.4 diameter.

http://community.webshots.com/user/camarogod98

1slowCamaro

Thats a very nice looking pulley you posted. I want to reply to JAS about how he was wondering why so many people upgrade to D-1 blowers when they never utilize the higher blower RPM limit. BlackLS1TA you can correct me if I'm wrong but isnt the D-1 supposed to have a more efficient impeller design thus making it a more efficient blower? I wanted the tuner kit for 8+ psi and when I bought it from LS1speed.com they upgraded it to the D-1 automatically. I'm happy they did.
Justin

JAS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 1slowCamaro:
<strong>Thats a very nice looking pulley you posted. I want to reply to JAS about how he was wondering why so many people upgrade to D-1 blowers when they never utilize the higher blower RPM limit. BlackLS1TA you can correct me if I'm wrong but isnt the D-1 supposed to have a more efficient impeller design thus making it a more efficient blower? I wanted the tuner kit for 8+ psi and when I bought it from LS1speed.com they upgraded it to the D-1 automatically. I'm happy they did.
Justin</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I have a P-1SC-H. I thought the impellers desing was the same. I think the D-1's use better material for the internals???

JAS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by camarogod98:
<strong>guys ive got a picture of one of my pullies up. its a 3.4 diameter.

http://community.webshots.com/user/camarogod98</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Looking good. Did you machine the notch yet?

Any pics of the idler yet?

1slowCamaro

Hey JAS. Thanks for posting all that info about the crank and SC pulley sizes and their effect on blower RPM. The 7.5" crank and the 3.2" SC pulley look like the best route.

Heres a question for anybody that cares to answer it. Which car would be faster? A car that reaches 10psi by 5200 RPMs with a rev limit at 5400 or a car that reaches 10psi at 6500 with a rev limit at 6600? Just curious how shifting so much earlier would affect 1/4 miles times. Either way I would still prefer the lower shift point since my engines internals are stock.
Later, Justin

JAS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 1slowCamaro:
<strong>Hey JAS. Thanks for posting all that info about the crank and SC pulley sizes and their effect on blower RPM. The 7.5" crank and the 3.2" SC pulley look like the best route.

...

Later, Justin</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Justin, the 7.5"/3.2" would NOT be the best route for the majority of people. Actually, none of these 7.5" would unless you had a build motor. I was talking 7.5"/3.2" for my motor as an experiment. I will probably end up with a 7.5"/3.6" to meet goals. The 7.5"/3.2" would probably make CRAZY boost for our engines, 15psi+ is not more. WAY TO MUCH for probably 99% of us here. Only car I could think off the top of my head that may be able to use it would be (Tom's) LS1Speeds car.

Anyone have an efficiency charts for ATI blowers?

Someone with more blower knowledge should also check the MATH on the pulley sizes. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

<small>[ October 21, 2002, 11:09 AM: Message edited by: JAS ]</small>

JAS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by camarogod98:
<strong>...

I dont see any point in having the idlers balanced. all the diameters are going to be turned together so the concentricty will be perfect as will the balance. As for the anodizing, Im still looking into sources for that and cost. Im really not sure what the 8 rib setup is going to cost because of anodizing and the salty cost of 7.750 bar stock 6061 aluminum. I should have it figured out in about a week.

later,

Jay H.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Jay, if you are going to go through all the trouble of doing the 6" or 7.5" crank or what not, can you check into making positive stops on the back end (sorta like the pins on the current version) but maybe just machined 1-2" slot that would rotate against the stock crank pulley spokes?

Also, maybe nitride threatment? More expensive probably, but wouldn't it be more durable? If they are quality pieces that will last without issues, the $$$ will probably be fine.

Black LS1 T/A

Mark C, in what way is "hard anodizing" different from the anodizing ATI is using now?

Black LS1 T/A

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 1slowCamaro:
<strong>Thats a very nice looking pulley you posted. I want to reply to JAS about how he was wondering why so many people upgrade to D-1 blowers when they never utilize the higher blower RPM limit. BlackLS1TA you can correct me if I'm wrong but isnt the D-1 supposed to have a more efficient impeller design thus making it a more efficient blower? I wanted the tuner kit for 8+ psi and when I bought it from LS1speed.com they upgraded it to the D-1 automatically. I'm happy they did.
Justin</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">From my understanding, the D-1SC has a better impeller design (helical) than the P-1SC. But the P-1SCH supposedly has the same helical impeller design.

I do NOT regret having gotten my D-1SC. Ask guys that got a P-1SC if they'd change... I think you'd get a different answer in many cases.

JAS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
I do NOT regret having gotten my D-1SC. Ask guys that got a P-1SC if they'd change... I think you'd get a different answer in many cases.[/QB]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No doubt Michael. I just wanted to know if there were any component material differences (bearings, etc).

According to ATI, the exducer diameter is smaller on the P-1SC-H compared to the D-1SC.

On another note, I believe our crank balancer/pulley is 7.5" if someone could check. So the crank pulley would be the same size instead of smaller. You guys would just have to use larger blower pulleys to keep manageable boost levels. That combined with 8-rib might be a nice solution to your belt slipping issues???? We'll probably have to space the blower more for room???