8rid or 12rib on f1a for 14-16lbs and what comp should motor?
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8rid or 12rib on f1a for 14-16lbs and what comp should motor?
What rib should I go with on 14-16lbs f1a on street car without slip?what comp should I build motor to run that boost on pump gas ? This is going to be a 402,408 or a 427. What power to should I get?
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I would agree with 9 to 1. I'm building a 418 on LS2 block with All Pro heads, F1A head unit with a 8 rib looking to push 15psi should see around 800 rwhp. Take a look.
http://forums.corvetteforum.com/show....php?t=2020873
http://forums.corvetteforum.com/show....php?t=2020873
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what pulley should I order 14 or 16? If I go with a 14lbs will I see 14lbs or less? Will the 8 rib slip with that boost?
Last edited by jeremym; 05-18-2008 at 06:19 PM.
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#9
As far as I can see it you can do it 2 ways. You can build a really stout LSx with a 10:1 comp and have a really low lsa cam like a 112. You will have a decent na setup. Then when you add the boost you take advantage of the VE of the motor setup and work off that. The other way to go about it is to build a lower comp motor like an 8.5:1. This way you can run more boost on lower octane safer. With an F1 at about 14-16 psi I would say you can make 850 easy on pump. I would also recomend an alky meth injection. Possibly even run E85 too.
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As far as I can see it you can do it 2 ways. You can build a really stout LSx with a 10:1 comp and have a really low lsa cam like a 112. You will have a decent na setup. Then when you add the boost you take advantage of the VE of the motor setup and work off that. The other way to go about it is to build a lower comp motor like an 8.5:1. This way you can run more boost on lower octane safer. With an F1 at about 14-16 psi I would say you can make 850 easy on pump. I would also recomend an alky meth injection. Possibly even run E85 too.
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We typicly build a street car setup for around 9.0-9.2:1 compression, better to be on the safe side for sure.
A 8rib usualy works fine for a f1a setup, depending on pulley size. If you try to push it as far as psi goes, you will start going through belts if you do not have a spring loaded tensioner. We currently do not run a tensioner setup as such, and we typicly do a belt swap a race depending on how many hits we make. A larger crank pulley might be the ticket to run a larger blower pulley for belt wrap.
Keep in mind the F-body bracket was designed around the p1sc and d1sc, take that and put a f1a-f1c on it and you might have some issues, .500 aluminum bracket might be a bit thin.
A 12rib is entirely possibly, but to retain the ATI fans and stock radiator, this is not possible. You need a larger inlet to the SC anyways. A smaller radiator would be the best way to go about doing this, or moving the blower uptop like a vette.
A 8rib usualy works fine for a f1a setup, depending on pulley size. If you try to push it as far as psi goes, you will start going through belts if you do not have a spring loaded tensioner. We currently do not run a tensioner setup as such, and we typicly do a belt swap a race depending on how many hits we make. A larger crank pulley might be the ticket to run a larger blower pulley for belt wrap.
Keep in mind the F-body bracket was designed around the p1sc and d1sc, take that and put a f1a-f1c on it and you might have some issues, .500 aluminum bracket might be a bit thin.
A 12rib is entirely possibly, but to retain the ATI fans and stock radiator, this is not possible. You need a larger inlet to the SC anyways. A smaller radiator would be the best way to go about doing this, or moving the blower uptop like a vette.
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It will take 14lbs for sure, but battling the belts is the biggest issue without a tensioner.
ATI does not offer a spring loaded version, sdce does modify the bracket for a tensioner.
Your car being a stick shift car might have belt issues, the rapid decel of the blower can cause belt slip. The spring tensioner setup helps take care of some of the slack caused on the long run of belt.
#17
I'd say at 14 to 16 psi with an F-1A on the LS1 bracket, you won't have any problems. One thing we have found that helps to eliminate belt slippage when at 14 -up psi is to use a larger air filter than what ProCharger sends with these kits. This is the filter we use. The reason the stock filter can cause belt slippage is because it becomes so restrictive. We have picked up two pounds of boost by swapping out the filters, and I have had customer's see the same results.
http://www.exoticperformanceplus.com...html?item=1086
We're running 18 to 20 psi of boost with the ProCharger bracket and an F-1A on my Z28, shown here. Bob
http://www.exoticperformanceplus.com...Car.php?car=12
http://www.exoticperformanceplus.com...html?item=1086
We're running 18 to 20 psi of boost with the ProCharger bracket and an F-1A on my Z28, shown here. Bob
http://www.exoticperformanceplus.com...Car.php?car=12
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#20
Screw rib setups. Cog belts.