CLASS RACER FORUM - RPM From Cylinder Head Flow

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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

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.

Re: RPM From Cylinder Head Flow

Quote:

Originally Posted by randy wilson (Post 107942)

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)

Re: RPM From Cylinder Head Flow

anybody else have any ideas ?