Quietest SC'er these days for 800 RWHP on a 390ci....E85.....
10-30-2014, 06:06 PM
#1
Quietest SC'er these days for 800 RWHP on a 390ci....E85..... I have asked this long ago.......which one is quiet...or closest to quiet. Not a deafening one that drowns out the stereo or can't hear the passenger talking......keeps factory A/C, will fit under the hood of a factory WS6.
800 RWHP would be the goal. Fully forged 390ci with LSA heads, probably keep the LS6 intake. E85 can be used full time if it will help, otherwise 93 pump gas would be preferred full time.
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800 RWHP would be the goal. Fully forged 390ci with LSA heads, probably keep the LS6 intake. E85 can be used full time if it will help, otherwise 93 pump gas would be preferred full time.
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10-30-2014, 06:42 PM
#3
Still gonna hear the scream of the SC'er.....?
How much $$$ extra does all that cost...?
Will it make 800 RWHP.....?
Any videos out there of one of these set ups running....that you know of...? Ive been watching a lot of SC'er videos on youtube.....
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10-30-2014, 07:48 PM
#4
You will barely be able to hear it at idle and will not hear it above idle.
https://ls1tech.com/forums/forced-in...-gear-set.html
I think the helical gear set is around $400, everything else is either required (bypass valve) or cheap (airfilter $20).
With some compression and running E85 like you said it will make close to 800 with a locked converter. Other superchargers that will get you comfortably into the 800's will be much louder. You might want to check into Whipples as well.
https://ls1tech.com/forums/forced-in...-gear-set.html
I think the helical gear set is around $400, everything else is either required (bypass valve) or cheap (airfilter $20).
With some compression and running E85 like you said it will make close to 800 with a locked converter. Other superchargers that will get you comfortably into the 800's will be much louder. You might want to check into Whipples as well.
10-30-2014, 08:04 PM
#5
You will barely be able to hear it at idle and will not hear it above idle.
https://ls1tech.com/forums/forced-in...-gear-set.html
I think the helical gear set is around $400, everything else is either required (bypass valve) or cheap (airfilter $20).
With some compression and running E85 like you said it will make close to 800 with a locked converter. Other superchargers that will get you comfortably into the 800's will be much louder. You might want to check into Whipples as well.
https://ls1tech.com/forums/forced-in...-gear-set.html
I think the helical gear set is around $400, everything else is either required (bypass valve) or cheap (airfilter $20).
With some compression and running E85 like you said it will make close to 800 with a locked converter. Other superchargers that will get you comfortably into the 800's will be much louder. You might want to check into Whipples as well.
Can they make over 800 RWHP on E85.....without being maxed out....?
I'll probably be around 10.2:1 compression when I boost it.
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10-30-2014, 10:42 PM
#6
All I can say it is NOT a F1C for quiet. 
My friends P1SC on a '99 Vette was very civil but was also at 560 rwhp on 93 no methanol...so short of your goal. His had 100K miles on it with 45k plus of that SC'd. Totally stock engine except for a cam and Kooks. Bigger injectors etc. Heads and oil pan have never been off the car. I would think an LS6 intake, good heads and a D1SC ought to go another 150 HP easily. That gets you on striking distance without too much effort and ought to be quiet enough.
My friends P1SC on a '99 Vette was very civil but was also at 560 rwhp on 93 no methanol...so short of your goal. His had 100K miles on it with 45k plus of that SC'd. Totally stock engine except for a cam and Kooks. Bigger injectors etc. Heads and oil pan have never been off the car. I would think an LS6 intake, good heads and a D1SC ought to go another 150 HP easily. That gets you on striking distance without too much effort and ought to be quiet enough.
10-30-2014, 11:20 PM
#7
All I can say it is NOT a F1C for quiet.
My friends P1SC on a '99 Vette was very civil but was also at 560 rwhp on 93 no methanol...so short of your goal. His had 100K miles on it with 45k plus of that SC'd. Totally stock engine except for a cam and Kooks. Bigger injectors etc. Heads and oil pan have never been off the car. I would think an LS6 intake, good heads and a D1SC ought to go another 150 HP easily. That gets you on striking distance without too much effort and ought to be quiet enough.
My friends P1SC on a '99 Vette was very civil but was also at 560 rwhp on 93 no methanol...so short of your goal. His had 100K miles on it with 45k plus of that SC'd. Totally stock engine except for a cam and Kooks. Bigger injectors etc. Heads and oil pan have never been off the car. I would think an LS6 intake, good heads and a D1SC ought to go another 150 HP easily. That gets you on striking distance without too much effort and ought to be quiet enough.
My friends 620 RWHP Vette is WAY WAY slower than these 800+ cars......
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10-31-2014, 03:20 AM
#8
It's pretty simple really. The D1SC is the biggest helical gear SC you can get. Most PD do not fit well under an F-Body hood. The firewall is the issue. Most all PD's have that whine.
Helical is not a $400 option. I think it's $100. I know for sure that polishing is more. Can you hit 800 with it yes. Is it common, not really. Someone put a D1SC on a chevy 572 and is made something like 1100hp.
Pretty much what JoeMama said.
That 390 is a great start but those heads and cam will not let you get to 800. A big split exhaust cam like 227/239 and some 230+cc heads would help a lot. You may want to look into a FAST intake. I know the LS6 intakes have been well over 800whp but they were on cars that could use much bigger blowers/turbos.
The next size up is the F-1a and it would certainly get you there but those straight cut gears are probably the loudest thing on the car.
Helical is not a $400 option. I think it's $100. I know for sure that polishing is more. Can you hit 800 with it yes. Is it common, not really. Someone put a D1SC on a chevy 572 and is made something like 1100hp.
Pretty much what JoeMama said.
That 390 is a great start but those heads and cam will not let you get to 800. A big split exhaust cam like 227/239 and some 230+cc heads would help a lot. You may want to look into a FAST intake. I know the LS6 intakes have been well over 800whp but they were on cars that could use much bigger blowers/turbos.
The next size up is the F-1a and it would certainly get you there but those straight cut gears are probably the loudest thing on the car.
10-31-2014, 08:43 AM
#9
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A 2.9 Whipple would easily make 800whp and not be too loud. But it would never fit without cutting. Either way, if you're trying to make 800whp, you're probably going to need a big, free flowing exhaust that will be really loud. Probably won't hear the s/c much at that point
10-31-2014, 09:37 AM
#10
TECH Enthusiast
His heads will work fine, LSA a heads are very similar to LS9 heads, have them ported, and a custom cam and you can hit 800whp with the D1SC, if you want more, it will be louder. Also, an LS6 intake will not fit on LSA heads, an LS3 will though.
10-31-2014, 11:35 AM
#11
A 2.9 Whipple would easily make 800whp and not be too loud. But it would never fit without cutting. Either way, if you're trying to make 800whp, you're probably going to need a big, free flowing exhaust that will be really loud. Probably won't hear the s/c much at that point
What does a Whipple cost.......?
Who sells them....?
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10-31-2014, 01:52 PM
#13
FWIW, my D1SC is maxed and I'm at 700 RWHP (granted its on an LT1 engine), but my car is loud as phuk! I don't have the helical gears, but I don't think it would make a difference. If you are pushing that much air with a free flowing exhaust, it's gonna be loud, even at idle. I can set off car alarms just by idling by. I ended up installing some cutouts after I restricted my exhaust so I could tolerate normal driving, and still be fast when I didn't mind being loud.
Whipple would be quieter until you get into boost. But there aren't too many LSX cars with whipples so getting more information may be a bit more difficult. Not sure if modding your hood will be needed or not for it.
Good luck, as this sounds like its gonna be difficult to find something that will get you that 800+ RWHP and still be quiet from a blower.
FWIW, turbos are quieter, and you could add nitrous to a more quiet supercharger for a couple other options to consider.
Whipple would be quieter until you get into boost. But there aren't too many LSX cars with whipples so getting more information may be a bit more difficult. Not sure if modding your hood will be needed or not for it.
Good luck, as this sounds like its gonna be difficult to find something that will get you that 800+ RWHP and still be quiet from a blower.
FWIW, turbos are quieter, and you could add nitrous to a more quiet supercharger for a couple other options to consider.
10-31-2014, 02:48 PM
#14
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You can get prices at www.whipplesuperchargers.com
11-01-2014, 12:31 AM
#16
I came across a very fast C6 not too long ago. After seeing it closer, it had a black colored F1A under the hood and it was much quieter than my D1SC. I was very surprised. My F1A sounds like a table saw btw. Not sure if there is an internal difference with that blower but F1A's can be pretty quiet I guess...
11-01-2014, 01:41 AM
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What ever you do lsa heads and ls6 intake not compatible.
My opinion a single turbo mounted down low to keep hot pipes from melting the entire engine compartment and keeping the hot radiator air from exiting or compromising the cooling system will be the way to go and you can easily control power/boost.
E 85 is yei here.
My opinion a single turbo mounted down low to keep hot pipes from melting the entire engine compartment and keeping the hot radiator air from exiting or compromising the cooling system will be the way to go and you can easily control power/boost.
E 85 is yei here.
