How much cam is too much?

General engine tech -- Drag Racing to Circle Track

Moderator: Team

statsystems
Guru
Guru
Posts: 1508
Joined: Sun Apr 03, 2016 1:17 am
Location:

Re: How much cam is too much?

Post by statsystems »

GARY C wrote: Tue Jun 19, 2018 8:43 pm
Headguy wrote: Tue Jun 19, 2018 8:31 pm
cstraub wrote: Tue Jun 19, 2018 5:10 pm 383 pump gas with that camshaft and AFR195's OTB
That should be great on fuel economy ;)
How would it effect it?
How do you increase fuel economy and hp at the same time, doesn't it normally require more fuel consumption to increase hp?
Surely your not just trying to create drama on a tech thread as opposed to just answering the OP's question?
Lif the port is more efficient, power will go up without an increase in fuel economy.

I struggle with people wanting to make power but think they can make X amount of horsepower without burning fuel.

You can't save the world. We aren't out of oil. There is no such thing as man made global warming. Build what you want. Let the freaky people worry about shit they can't control.
paulzig
Expert
Expert
Posts: 643
Joined: Sun Aug 03, 2008 6:29 am
Location: Australia

Re: How much cam is too much?

Post by paulzig »

Headguy wrote: Tue Jun 19, 2018 8:37 pm Yes, those 220 cc heads are just WAAAY to big, it will lose so much down low power you won't be able to drive it. Even with the 23 extra cubes.

If I were you I would get some 195 and full them in till they're about 160cc.

Then when you want to go faster you can grind them out to 230cc
Well, an LS3 does it with less bore, less stroke and 260cc heads... Is there really that much difference to what they do VS a gen 1 SBC based engine? Why couldnt you adapt the same philosophy and build the same style of engine on the older platform.
lefty o
Guru
Guru
Posts: 3445
Joined: Tue Oct 15, 2013 8:50 am
Location:

Re: How much cam is too much?

Post by lefty o »

paulzig wrote: Tue Jun 19, 2018 11:44 pm
Headguy wrote: Tue Jun 19, 2018 8:37 pm Yes, those 220 cc heads are just WAAAY to big, it will lose so much down low power you won't be able to drive it. Even with the 23 extra cubes.

If I were you I would get some 195 and full them in till they're about 160cc.

Then when you want to go faster you can grind them out to 230cc
Well, an LS3 does it with less bore, less stroke and 260cc heads... Is there really that much difference to what they do VS a gen 1 SBC based engine? Why couldnt you adapt the same philosophy and build the same style of engine on the older platform.
id just ignore the headcase, he is flat wrong.
tresi
Pro
Pro
Posts: 341
Joined: Sun Mar 24, 2013 10:10 pm
Location:

Re: How much cam is too much?

Post by tresi »

For power brakes to be useable and to extend clutch life stick to 218-224 @ .50 106-110 lobe separation.
user-30257

Re: How much cam is too much?

Post by user-30257 »

paulzig wrote: Tue Jun 19, 2018 11:44 pm
Headguy wrote: Tue Jun 19, 2018 8:37 pm Yes, those 220 cc heads are just WAAAY to big, it will lose so much down low power you won't be able to drive it. Even with the 23 extra cubes.

If I were you I would get some 195 and full them in till they're about 160cc.

Then when you want to go faster you can grind them out to 230cc
Well, an LS3 does it with less bore, less stroke and 260cc heads... Is there really that much difference to what they do VS a gen 1 SBC based engine? Why couldnt you adapt the same philosophy and build the same style of engine on the older platform.
I was being sarcastic to the cam salesman
KnightEngines
Guru
Guru
Posts: 2680
Joined: Fri Jan 09, 2009 8:51 pm
Location: Australia

Re: How much cam is too much?

Post by KnightEngines »

Use italics for sarcasm, just to make it a bit more obvious...…...
paulzig
Expert
Expert
Posts: 643
Joined: Sun Aug 03, 2008 6:29 am
Location: Australia

Re: How much cam is too much?

Post by paulzig »

Headguy wrote: Tue Jun 19, 2018 11:58 pm
paulzig wrote: Tue Jun 19, 2018 11:44 pm
Headguy wrote: Tue Jun 19, 2018 8:37 pm Yes, those 220 cc heads are just WAAAY to big, it will lose so much down low power you won't be able to drive it. Even with the 23 extra cubes.

If I were you I would get some 195 and full them in till they're about 160cc.

Then when you want to go faster you can grind them out to 230cc
Well, an LS3 does it with less bore, less stroke and 260cc heads... Is there really that much difference to what they do VS a gen 1 SBC based engine? Why couldnt you adapt the same philosophy and build the same style of engine on the older platform.
I was being sarcastic to the cam salesman
Yes I figured, I couldnt understand how a 220cc AFR head is too big and the 195 is fine when the difference in cross section isnt that great what would it be .125"-.150" or something. Put the same cam in as the 383 with 195cc head example on the 406 with the 220s. what would make one great and the other a disaster?
Warp Speed
Guru
Guru
Posts: 3277
Joined: Wed Jun 25, 2008 1:46 pm
Location: NC

Re: How much cam is too much?

Post by Warp Speed »

lefty o wrote: Tue Jun 19, 2018 11:46 pm
paulzig wrote: Tue Jun 19, 2018 11:44 pm
Headguy wrote: Tue Jun 19, 2018 8:37 pm Yes, those 220 cc heads are just WAAAY to big, it will lose so much down low power you won't be able to drive it. Even with the 23 extra cubes.

If I were you I would get some 195 and full them in till they're about 160cc.

Then when you want to go faster you can grind them out to 230cc
Well, an LS3 does it with less bore, less stroke and 260cc heads... Is there really that much difference to what they do VS a gen 1 SBC based engine? Why couldnt you adapt the same philosophy and build the same style of engine on the older platform.
id just ignore the headcase, he is flat wrong.
No, he's correct! :wink:
Didn't we just go through this same argument a couple of weeks ago in a 195 vs 210 thread or something? Lol #-o
user-30257

Re: How much cam is too much?

Post by user-30257 »

Warp Speed wrote: Wed Jun 20, 2018 4:31 am
lefty o wrote: Tue Jun 19, 2018 11:46 pm
paulzig wrote: Tue Jun 19, 2018 11:44 pm

Well, an LS3 does it with less bore, less stroke and 260cc heads... Is there really that much difference to what they do VS a gen 1 SBC based engine? Why couldnt you adapt the same philosophy and build the same style of engine on the older platform.
id just ignore the headcase, he is flat wrong.
No, he's correct! :wink:
Didn't we just go through this same argument a couple of weeks ago in a 195 vs 210 thread or something? Lol #-o
Lol.. apparently you can't even guide a donkey to water.

Oh well moo moo it.
mag2555
Guru
Guru
Posts: 4584
Joined: Sun Sep 18, 2011 11:31 am
Location: Heading for a bang up with Andromeda as we all are.

Re: How much cam is too much?

Post by mag2555 »

Once you've been on both sides of the coin there is no denning that a slightly under Camed street / strip car is fun to drive 95% of the time where as a slightly over Camed car is not fun to drive 75% of the time!
You can cut a man's tongue from his mouth, but that does not mean he’s a liar, it just shows that you fear the truth he might speak about you!
dualquad
Member
Member
Posts: 51
Joined: Fri Dec 25, 2015 12:22 pm
Location:

Re: How much cam is too much?

Post by dualquad »

Warp Speed wrote: Wed Jun 20, 2018 4:31 am
lefty o wrote: Tue Jun 19, 2018 11:46 pm
paulzig wrote: Tue Jun 19, 2018 11:44 pm

Well, an LS3 does it with less bore, less stroke and 260cc heads... Is there really that much difference to what they do VS a gen 1 SBC based engine? Why couldnt you adapt the same philosophy and build the same style of engine on the older platform.
id just ignore the headcase, he is flat wrong.
No, he's correct! :wink:
Didn't we just go through this same argument a couple of weeks ago in a 195 vs 210 thread or something? Lol #-o
We all know how you and Headguy just love an argument. LOL
user-30257

Re: How much cam is too much?

Post by user-30257 »

dualquad wrote: Wed Jun 20, 2018 6:27 am
Warp Speed wrote: Wed Jun 20, 2018 4:31 am
lefty o wrote: Tue Jun 19, 2018 11:46 pm

id just ignore the headcase, he is flat wrong.
No, he's correct! :wink:
Didn't we just go through this same argument a couple of weeks ago in a 195 vs 210 thread or something? Lol #-o
We all know how you and Headguy just love an argument. LOL
No, we prefer FACT and not propaganda.
Warp Speed
Guru
Guru
Posts: 3277
Joined: Wed Jun 25, 2008 1:46 pm
Location: NC

Re: How much cam is too much?

Post by Warp Speed »

mag2555 wrote: Wed Jun 20, 2018 6:16 am Once you've been on both sides of the coin there is no denning that a slightly under Camed street / strip car is fun to drive 95% of the time where as a slightly over Camed car is not fun to drive 75% of the time!
You don't have to over cam it if you use a good cylinder head!
Warp Speed
Guru
Guru
Posts: 3277
Joined: Wed Jun 25, 2008 1:46 pm
Location: NC

Re: How much cam is too much?

Post by Warp Speed »

Headguy wrote: Wed Jun 20, 2018 6:28 am
dualquad wrote: Wed Jun 20, 2018 6:27 am
Warp Speed wrote: Wed Jun 20, 2018 4:31 am

No, he's correct! :wink:
Didn't we just go through this same argument a couple of weeks ago in a 195 vs 210 thread or something? Lol #-o
We all know how you and Headguy just love an argument. LOL
No, we prefer FACT and not propaganda.
THIS^^^^^^^^ =D>
MELWAY
Guru
Guru
Posts: 1005
Joined: Mon Dec 04, 2006 7:37 pm
Location: melbourne australia

Re: How much cam is too much?

Post by MELWAY »

mag2555 wrote: Wed Jun 20, 2018 6:16 am Once you've been on both sides of the coin there is no denning that a slightly under Camed street / strip car is fun to drive 95% of the time where as a slightly over Camed car is not fun to drive 75% of the time!
Interesting
Most streetcars I’ve done last few years are 270-280s. Some 280-290s. And these dudes love driving them weekly
Lol
3370lb Sedan 9.89@136MPH 358chevN/A
Post Reply