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View Full Version : stupied question 8-71/10-71


SSTahoe
07-28-2005, 07:52 AM
what is the differance beside the over all size which would be better for my application? I have 2 420 mega blower's for sale one is good shape the other needs rebuild. My boat is a 42' sonic with 2 572 tall decks runninng #6 drives just was woundering which blower I should go with?? I will mainly be running at Lake Tahoe which is at 6,500 ft elevation.
obnoxious001
07-28-2005, 08:52 AM
I think with the larger cubic inch engine, you would want to consider a larger blower, possibly 10-71 or even 14-71, so that you don't have to turn them as hard to supply all those cubes.
I have a couple of tall deck Richard Lee intake manifolds with the intercoolers built in, if you can use them. PM or email me at agt001@aol.com
SSTahoe
07-28-2005, 08:56 AM
I think with the larger cubic inch engine, you would want to consider a larger blower, possibly 10-71 or even 14-71, so that you don't have to turn them as hard to supply all those cubes.
I have a couple of tall deck Richard Lee intake manifolds with the intercoolers built in, if you can use them. PM or email me at agt001@aol.com
cool do you have any pics of them?? plus cp performance has some complete packages for 8-71 and 10-71's the 8-71 are about $3500.00 is that good price??
revndave
07-28-2005, 04:13 PM
I would run 14-71 on those motors.Mooneyham said there is only about 100.00 difference between 10s and 14s.
SSTahoe
07-28-2005, 04:40 PM
I would run 14-71 on those motors.Mooneyham said there is only about 100.00 difference between 10s and 14s.
Wow realy a 14-71...what horsepower gain would I get a with a 14-71? what would I have to change's would I have to do to my motors to fit a beast like that?
revndave
07-28-2005, 05:17 PM
Wow realy a 14-71...what horsepower gain would I get a with a 14-71? what would I have to change's would I have to do to my motors to fit a beast like that?
Dont know about hp gains.I dont think you would have to change anything.They are blower motors now?
wsuwrhr
07-28-2005, 07:46 PM
Dont know about hp gains.I dont think you would have to change anything.They are blower motors now?
I think the distributor might become a problem with a 14. Might need to run a mag, small cap, or offset distributor.
I might be wrong too. I was just having this conversation on vacation, we looked up a site regarding case lengths and such. I don't remember the site though.
Brian
revndave
07-28-2005, 08:15 PM
I run an innercooler.My distributor clears no problem.
SSTahoe
07-28-2005, 08:34 PM
Yes they are blower motors right now.. as far as the distributor it will clear the blower if you use a intercooler too.
sdba069
07-28-2005, 09:09 PM
The 10's work great. With the comp manifold, you can run ANY distributor, even without the intercooler. Save yourself a few hundred dollars on that offset.
Huffer
07-31-2005, 10:01 AM
WORKS GREAT WITH INTERCOOLER NO DIST. PROBLEMS THAT WAY!!!!!GREAT HP DIFFERENCE I COULD NOT BELIEVE IT!ALL I CHANGED WAS THE BLOWER!
DOESN'T BUILD HEAT AS BAD!
acatitude
08-03-2005, 08:19 PM
your dist. will work fine. I would ask what size carbs were you running with the b/m 420. if they were just 750's you might want to go with something a little bigger. I have 980's on my 588ci w/14-71 you might even go w/1050. cant have to much fuel in them babies :)