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+--- Thread: how many HP can the original cylinder head handle? om617a (/showthread.php?tid=2193)
how many HP can the original cylinder head handle? om617a - Diesel-Wiking - 01-27-2011
I just wonder how many horsepower the original cylinder head can handle? without modify it with better inlet&outlet++
300?
RE: how many HP can the original cylinder head handle? om617a - ForcedInduction - 01-27-2011
The head is not the limit, the rods are. The 617 has been known to pass 400hp before the internals become external.
RE: how many HP can the original cylinder head handle? om617a - garage - 01-27-2011
(01-27-2011, 05:14 PM)ForcedInduction The head is not the limit, the rods are. The 617 has been known to pass 400hp before the internals become external.
Where can i find some info on a 617 with 400hp?
RE: how many HP can the original cylinder head handle? om617a - ForcedInduction - 01-27-2011
http://www.kolumbus.fi/valtonen.motorsport/index.htm
RE: how many HP can the original cylinder head handle? om617a - garage - 01-27-2011
(01-27-2011, 05:20 PM)ForcedInduction http://www.kolumbus.fi/valtonen.motorsport/index.htm
Darn i was hopeing it was a different car than that.
RE: how many HP can the original cylinder head handle? om617a - ForcedInduction - 01-27-2011
Not many Finns use the 617, the 60x series is too common over there and gets better results with less work.
RE: how many HP can the original cylinder head handle? om617a - Diesel-Wiking - 01-27-2011
thanks forced.. cause here in Norway everybody says that the original head is a way too bad to get much horsepower out of it without heavy modifications.
I'm not shure which engine I shall built on, either 617 or 603, it will be fitted in an 69' modell BMW. I like 617 better, but the 603 could possibly a better choice...however, thank you for the answers. I have to messure a bit on the BMW and think a bit more about it.
RE: how many HP can the original cylinder head handle? om617a - DeliveryValve - 01-27-2011
(01-27-2011, 06:30 PM)Diesel-Wiking thanks forced.. cause here in Norway everybody says that the original head is a way too bad to get much horsepower out of it without heavy modifications.
...
I think from visually looking at the head and thinking from an efficiency standpoint, the 617 heads are a hinderance to flow. The actual head is pretty thin. With that design, the ports take a sharp 90 degree turn into and out of the combustion chamber. This sharp turn, no doubt in my mind, will slow down velocity. I think raising the ports and greatly reducing the angle into the combustion chamber would help immensely. But of course, this is my own theory and I have no means to back it up.
.
RE: how many HP can the original cylinder head handle? om617a - MJF - 01-28-2011
(01-27-2011, 05:20 PM)ForcedInduction http://www.kolumbus.fi/valtonen.motorsport/index.htm
Have you seen 400+ dynosheet? All I´ve heard is ~360hp at crank of this. Couple other 350+hp 617's too.