L-35 heads.

[It's just a six]

Re: L-35 heads.

What you're talking about is what's called "Drainpipe mentality",the bigger-the better.That doesn't al
ways work.The 2 most important things about porting heads are volume and velocity(pressure).The quest is to find the right balance between the 2.First of all is that heads only flow on a flow bench,in a running motor they pulse.Every time the valve opens and closes the pressure changes in the port and that's the same if you're in boost or not.When the back pressure and intake pressure equalize is when you will get sheeting or puddleing.The determining factors to intake size are bore,stroke,valve size and cam,both lift and duration.What you're attempting to do is drainpipe your heads,put a set of Brodix -10's on a completely stock motor and see how good that works.I really don't know what else to tell ya,but since you're so determined to be right,go ahead and do it.

The bigger the better is not what I am talking about,, these stock GM production heads are small in volume, don't know why you would compare removing the vane is going to equal to -10 Brodix heads, not even close my friend.

By removing this vane, we are still going to have good port velocity (there small ports), not as high as the swirl vane but I am betting the turbocharger is going to take care of the lower port velocity.:tup:

Since you do not answer my questions about customer feedback from your massaged L-35 heads with & with out the vanes removed & turbocharged application, or even flow charts, I take that no response as you do not know or?

The only thing you are adding to this topic is negative responses, you said you were done w/this topic a long time ago, why come back if it's all negative & no REAL info to offer?

BTW, the Newer 96 Vortec heads has no high swirl vane in them, bigger CC intake port volume also, in your book that sounds like "Drainpipe mentality",

Also the 1955 -1986 SBC no high swirl vanes in those heads are all "Drainpipe mentality",. Give me a break, the 1955 SBC heads are tiny tiny port & intake volume.

 

[Snoman002]

Re: L-35 heads.

Wow dude, just, wow. Why even type it up if you didn't want to hear anything contrary to your own opinion?

Enjoy your head porting.

 

[It's just a six]

Re: L-35 heads.

Wow dude, just, wow. Why even type it up if you didn't want to hear anything contrary to your own opinion?

Enjoy your head porting.

Yes, just wow.

We need some helpful info to contribute , not negativity .

It's just something I would like to try, it might work it might not. If you think he is helping, don't know what to tell you.

This is an R&D experiment, somebody that's just saying it does not work because they tried it but has no proof to back it up is not helpful in my eyes, maybe yours?

The topic is for us to learn from, not coming here to argue or disagree w/me or others.

I knew this topic would get mixed feelings, but as far as I know, these tests were never conducted for our specific applications.

I am not expecting the L-35 heads to flow more on a flow bench more than a Vortec, I never said they will.

I am pretty sure if we can removed this high swirl vane (hoping there not hollow) the L-35 heads will flow more than they do with the vane. At least that is what I am hoping for.

So far, nobody has given me any hard evidence that by removing this vane will cause the cylinder head to flow less. Heck, nobody here has even stated that these vanes are solid.

If these people say they have removed the vanes & flow tested them, why cant they answer my simple questions, like, are the vanes solid, what did they flow w/the vanes removed? Instead just negative arguments.

See where I am coming from?

 

[It's just a six]

Re: L-35 heads.

Vortec

Pics of my L-35's. These are off an SGT. I'm having them pocket ported. My engine guy said he doesn't like the vane but has never completely removed one. HUGE difference between these and Vortecs. If I was going for all out power then it's a clear choice for Vortecs, but I'm just looking for a little increase and still want to keep the EGR.

Thanks for posting your heads.:tup::tup:

 

[It's just a six]

Re: L-35 heads.

Here are the heads I am thinking will flow about the same as the L-35 heads with the vane removed.
Now I have not really looked as a direct comparison, so forgive me if these are not a good comparison. I see the chambers are different shape, maybe the L-35 chambers are better than the 441?
SBC 441 heads
http://www.bing.com/images/search?q=Chevy+3932441+Heads+pics&qpvt=Chevy+3932441+Heads+pics&FORM=IGRE.
80cc, w/1.94"/1.5" valves; w/1.94"/1.6" valves, 165/65cc port volumes

441” GM Cylinder Head Flow Data "STOCK"

Valve Size 1.94”/1.5”
Chamber Size 76cc
Intake Runner 155cc’s
Flow In./Ex. @

.100” 55/45
.200” 110/83
.300” 160/118
.400” 194/133
.500” 201/146
.600” 203/148

Chevy 441 Iron CHP 155/62 1.94/1.50
-
No Pipe 76 55/45
81.8% 110/80
72.7% 160/112
70%
54.1/63.4
160/188
.599/.543
194/127
65.5%
65.6/71.9
194/213
.545/.461
201/136
67.7%
68/77
201/228
.452/.395
203/139
68.5%
68.7/78.7
203/233
.38/.337
- - - - 174/119
68.4%
1.31/2.24
.393/.304

 

[Aeroking]

Re: L-35 heads.

this is a funny thread. Having blinders on to everyone else's input, then comparing 23deg L35 heads to 15deg LS1 heads, lmao.

You publicly made an ass of yourself. You used copy & pasted info to argue against hands on experience. :rotf: All for an extra 10hp. Good luck with your heads.

 

[90pgt]

Re: L-35 heads.

I have a question for all the naysayer's that think is a waste of time. it's a simple yes or no answer. have you removed the vane in a set of L-35 heads and had them flowed and or ran them on a dyno?

 

[It's just a six]

Re: L-35 heads.

I have a question for all the naysayer's that think is a waste of time. it's a simple yes or no answer. have you removed the vain in a set of L-35 heads and had them flowed and or ran them on a dyno?

That is a question that seem cannot be answered.

This is what I think happened, IMO, these vanes may have been removed, then they flow tested them, & that is as far as it went. No dyno, no drag testing, nothing.

It can happen, & just because a flow bench may have not seen any gain, they figured, why bother.

I have said before, just because something looks good on a flow bench, does not mean it is going to work great on a vehicle, & vise versa.:2cents:

 

[90pgt]

Re: L-35 heads.

im not saying it will work or not work but i don't see a reason to not try.

my bowtie made est. 650hp ( trap 127 @ 4000 lbs) on 20 psi with a ITS 80mm through ported L-35's

 

[It's just a six]

Re: L-35 heads.

I'm having my ported L35s drilled out for bronze guides and if the vains are solid I'm going to remove them and re flow the heads

Nice heads!

Do you have a flow chart of those heads?

Found it!

http://www.syty.net/forums/showthread.php?t=95956&highlight=l35

 

[Jkanser]

Re: L-35 heads.

Ahhh, this thread takes me back to my old DSM days when I was the admin of a hardcore DSM racing site. Some people envisioned themselves as innovators by asking similar questions as posed here and when long time members posted to the contrary, said innovator would post irrelevant data sets. I'm not trying to dissuade you here, even with the absence of flow information it seems that others feel this will not be a worthwhile mod. I applaud your dedication nonetheless.

 

[It's just a six]

Re: L-35 heads.

Ahhh, this thread takes me back to my old DSM days when I was the admin of a hardcore DSM racing site. Some people envisioned themselves as innovators by asking similar questions as posed here and when long time members posted to the contrary, said innovator would post irrelevant data sets. I'm not trying to dissuade you here, even with the absence of flow information it seems that others feel this will not be a worthwhile mod. I applaud your dedication nonetheless.

Thank you.

I am in the middle of porting a LB4 head & will see how it pans out.