427 SBF

Bored while waiting for parts to arrive.

When head manufacturers post the flow numbers at low lift, does this also correlate to tq potential at those lower lifts? Most probably look at the flow at peak lift only, but how do all those other numbers stack up in the grand scheme?
 
89 Fox 427 said:
Bored while waiting for parts to arrive.

When head manufacturers post the flow numbers at low lift, does this also correlate to tq potential at those lower lifts? Most probably look at the flow at peak lift only, but how do all those other numbers stack up in the grand scheme?
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I've seen a fair amount of people say that lift at 400ish is most important for street cars.
Makes sense, since your pass .400 twice on the way to the .650 or whatever.
 
89 Fox 427 said:
@Steve439 if you want to sit through another camshaft video of potentially hot air.. check this out.
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LOL, when he showed the first chart I thought "That's a chart from a Vizard book".

This stuff is all a grey area.
The best dyno and 1/4 numbers won't be the best 99% street car.

If you didn't see my post about Vizard and LSA I'll repeat it:

I was reading one of his books and he spent about four pages detailing why one should run a tight LSA.
Then, after I've carefully read that diatribe, he adds:

"Of course, this is all race stuff. If it's a street car you'll want a wider LSA".

Mother fucker!

Anyway, IIRC your cam is 113.
You'll love it.
 
Steve439 said:
LOL, when he showed the first chart I thought "That's a chart from a Vizard book".

This stuff is all a grey area.
The best dyno and 1/4 numbers won't be the best 99% street car.

If you didn't see my post about Vizard and LSA I'll repeat it:

I was reading one of his books and he spent about four pages detailing why one should run a tight LSA.
Then, after I've carefully read that diatribe, he adds:

"Of course, this is all race stuff. If it's a street car you'll want a wider LSA".

Mother fucker!

Anyway, IIRC your cam is 113.
You'll love it.
Click to expand...

I hope so, because a very similar cam in a very similar combo sounds like absolute shit at idle in my opinion

About 3:55 they fire it up

 
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89 Fox 427 said:
I hope so, because a very similar cam in a very similar combo sounds like absolute shit at idle in my opinion

About 3:55 they fire it up

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In my opinion those wheels fuck that car up. Some better wheels would set that thing off. It doesn’t sound great, but I wouldn’t put too much stock in that video.
 
Patriot Racer said:
In my opinion those wheels fuck that car up. Some better wheels would set that thing off. It doesn’t sound great, but I wouldn’t put too much stock in that video.
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Might be worse than autodrags
 
Steve439 said:
LOL, when he showed the first chart I thought "That's a chart from a Vizard book".

This stuff is all a grey area.
The best dyno and 1/4 numbers won't be the best 99% street car.

If you didn't see my post about Vizard and LSA I'll repeat it:

I was reading one of his books and he spent about four pages detailing why one should run a tight LSA.
Then, after I've carefully read that diatribe, he adds:

"Of course, this is all race stuff. If it's a street car you'll want a wider LSA".

Mother fucker!

Anyway, IIRC your cam is 113.
You'll love it.
Click to expand...
The cam I just got from Jones with 837 lift has the widest lsa I've ever ran.
I think the cam is designed around other parameters and the lsa is what it is
 
BOSS#1540 said:
The cam I just got from Jones with 837 lift has the widest lsa I've ever ran.
I think the cam is designed around other parameters and the lsa is what it is
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You might want to ask Mike about that statement the lsa is what it is
 
BOSS#1540 said:
Lol. Ok. I think he puts the valve events where he wants for my situation and the lsa ends up being wider than other smaller, lower revving combos I've had ?
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You just answered your question , it’s a high rpm cam
 
Low & slow said:
You just answered your question , it’s a high rpm cam
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Yes, set up to shift at 8200 and cross at 8600. It doesn't have much more duration and about the same overlap as the cam I was running, which was supposed to be 4-8000rpm but was done at 7000. Old one was 108 lsa, +4 , NEW ONE is 112/113 lsa +4
I talked with mike lots, he's very helpful, but I'll leave that stuff up to him, lol.
 
D
BOSS#1540 said:
Yes, set up to shift at 8200 and cross at 8600. It doesn't have much more duration and about the same overlap as the cam I was running, which was supposed to be 4-8000rpm but was done at 7000. Old one was 108 lsa, +4 , NEW ONE is 112/113 lsa +4
I talked with mike lots, he's very helpful, but I'll leave that stuff up to him, lol.
Click to expand...
Did he say why the cam was done at 7000 rpm , lack of duration? Or intake valve closing to soon ?
 
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