RPM From Cylinder Head Flow

trmnatr · 02-27-2009, 02:25 AM

How high on an RPM will an engine turn with this flow ?

28" 4.060" Bore Intake / Exhaust 2.055 intake valve / 1.60 exhaust valve
.100" 64 / 57
.200" 128 / 111
.300" 180 / 149
.400" 221 / 172
.500" 253 / 189
.600" 273 / 198

Intake angles - 32degree / 45 degree / 60 degree / 70 degree / 80 degree
Exhaust angles - 37 degree / 45 degree / radius

Engine with 4.030" - 4.060" bore and 3.26" stroke , take a guess how high the top rpm would be ?

Just for cam purposes we will pick the new Comp cams solid roller thats a good off the shelf part number
307/317 @.020
278.284 @.050
201/197 @.200
.684"/.660" lift
106 degree lobe seperation
HXL Intake Lobe
RZ Exhaust Lobe

randy wilson · 02-27-2009, 08:38 AM

straight up it will pull decent to 8800 . retard it 3 and go to 9000 or 9200. just guessing. centerline might be a little narrow for that.

trmnatr · 02-27-2009, 09:31 AM

Quote:

Originally Posted by randy wilson

straight up it will pull decent to 8800 . retard it 3 and go to 9000 or 9200. just guessing. centerline might be a little narrow for that.

Probally very close, i was thinking 8,500rpm installed @ 106 icl (cam is 106 lobe center / 0 advance)

trmnatr · 02-27-2009, 11:20 PM

anybody else have any ideas ?

02-27-2009, 02:25 AM	#1
trmnatr Member Join Date: Oct 2008 Posts: 168 Likes: 0 Liked 1 Time in 1 Post	RPM From Cylinder Head Flow How high on an RPM will an engine turn with this flow ? 28" 4.060" Bore Intake / Exhaust 2.055 intake valve / 1.60 exhaust valve .100" 64 / 57 .200" 128 / 111 .300" 180 / 149 .400" 221 / 172 .500" 253 / 189 .600" 273 / 198 Intake angles - 32degree / 45 degree / 60 degree / 70 degree / 80 degree Exhaust angles - 37 degree / 45 degree / radius Engine with 4.030" - 4.060" bore and 3.26" stroke , take a guess how high the top rpm would be ? Just for cam purposes we will pick the new Comp cams solid roller thats a good off the shelf part number 307/317 @.020 278.284 @.050 201/197 @.200 .684"/.660" lift 106 degree lobe seperation HXL Intake Lobe RZ Exhaust Lobe

02-27-2009, 08:38 AM	#2
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	Re: RPM From Cylinder Head Flow straight up it will pull decent to 8800 . retard it 3 and go to 9000 or 9200. just guessing. centerline might be a little narrow for that. __________________ don,t have one

02-27-2009, 11:20 PM	#4
trmnatr Member Join Date: Oct 2008 Posts: 168 Likes: 0 Liked 1 Time in 1 Post	Re: RPM From Cylinder Head Flow anybody else have any ideas ?