8.3l Whipple vs. 10-71
02-12-2022, 10:05 PM
#81
Registered
Thread Starter
Probably too small to run an 8.3l Whipple.
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SB (02-12-2022)
02-12-2022, 10:16 PM
#82
Registered
Dan: just wondering what Rotors your roots blowers were using, 60 Degrees or 120 Degrees? not that it maters much at this point just curious.
02-12-2022, 10:21 PM
#83
Registered
Still waiting for pics of whipple manifolds modified for better distribution, especiakly for carb apps. Anybody have pics or sources ?
02-13-2022, 08:23 AM
#85
Registered
I see you have my boat's new engine.
I'm running these turboes.
https://i.ytimg.com/vi/qTeRPH5_vlk/maxresdefault.jpg
I'm running these turboes.
https://i.ytimg.com/vi/qTeRPH5_vlk/maxresdefault.jpg
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ICDEDPPL (02-13-2022)
02-13-2022, 09:20 AM
#86
Geronimo36
Gold Member
I didn't mean you didnt have a good engine. Just that the big blower on a lower boost setup can sometimes cause more harm then good. Or, if you want to do it, you have to compensate somehow for turning it slow with running port injection for instance or a little richer AFR to help the lean cylinders because of going through the hat. Its sort of like putting a huge carburetor on top of a small engine and there's no signal. The same issues can happen on a 14-71 on a 548 with low boost. For instance, I'm building some 540s right now and I opted for the 3.8 because were going to make 950hp. If I wanted to make 1200-1300, I would have upsized the blower.Just trying to help and give some suggestions.
Last edited by Panther; 02-15-2022 at 08:47 AM.
02-13-2022, 12:59 PM
#87
Registered
Thread Starter
I know, it`s all good lol.
The blower is a little big but like my wife says it doesn`t hurt.
Let`s see how that tunnel ram with port injection works out .
The blower is a little big but like my wife says it doesn`t hurt.
Let`s see how that tunnel ram with port injection works out .
The following 2 users liked this post by ICDEDPPL:
getrdunn (02-13-2022), Gimme Fuel (02-14-2022)
02-19-2022, 01:36 PM
#88
Registered
I didn't mean you didnt have a good engine. Just that the big blower on a lower boost setup can sometimes cause more harm then good. Or, if you want to do it, you have to compensate somehow for turning it slow with running port injection for instance or a little richer AFR to help the lean cylinders because of going through the hat. Its sort of like putting a huge carburetor on top of a small engine and there's no signal. The same issues can happen on a 14-71 on a 548 with low boost. For instance, I'm building some 540s right now and I opted for the 3.8 because were going to make 950hp. If I wanted to make 1200-1300, I would have upsized the blower.Just trying to help and give some suggestions.
It would be interesting to see the dyno results of a 565 with a 3.8 vs a 4.5L up from 900 to 1100 hp, with each individual cylinder monitored to better understand the fuel/ air distribution.
02-19-2022, 07:40 PM
#89
Platinum Member
Platinum Member
How do the 3.8's compare to the 4.0 and 4.5L Whipples? I'm hearing more guys using the 3.8 for a 900-1100 hp build -- are the 3.8's that efficient they will support 1100hp with 91 octane? I'm assuming a MOAC intercooler on these builds...
It would be interesting to see the dyno results of a 565 with a 3.8 vs a 4.5L up from 900 to 1100 hp, with each individual cylinder monitored to better understand the fuel/ air distribution.
It would be interesting to see the dyno results of a 565 with a 3.8 vs a 4.5L up from 900 to 1100 hp, with each individual cylinder monitored to better understand the fuel/ air distribution.
