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Search: Posts Made By: automotivebreath
Forum: performance & modifications 09-18-2008, 08:36 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Hi Scott, I'd like to hear more about your...

Hi Scott,
I'd like to hear more about your engine, is it meeting expectations?

As for the converging grooves, I did a set for a high end street rod a year or so ago with these. The owner, a long...
Forum: performance & modifications 09-16-2008, 08:22 PM
Replies: 57
Views: 8,355
Posted By automotivebreath
Here's some pictures of combustion chambers from...

Here's some pictures of combustion chambers from Jake, very knowledgeable guy with a great set-up. We talked a few times before his testing, I never did hear of results, until now.
...
Forum: performance & modifications 09-16-2008, 04:10 PM
Replies: 57
Views: 8,355
Posted By automotivebreath
Interesting, do you know exactly what Jake Raby...

Interesting, do you know exactly what Jake Raby did? Engine type, I assume air cooled; combustion chamber design, squish clearance, compression ratio? Did he do any detonation resistance or lean...
Forum: performance & modifications 09-16-2008, 12:02 PM
Replies: 57
Views: 8,355
Posted By automotivebreath
Karl, I have a passion with combustion. I met...

Karl,
I have a passion with combustion. I met some very intelligent people here on turbobricks, people that have a vast knowledge on the subject of combustion. Along he way I was able to develop...
Forum: performance & modifications 09-15-2008, 10:20 PM
Replies: 57
Views: 8,355
Posted By automotivebreath
Most automobile manufactures set up their cars...

Most automobile manufactures set up their cars where they burn excess fuel in the cat during the exahust stroke! Mjolner do you want to burn all of the fuel before the exahust valve opens?

whats...
Forum: performance & modifications 08-14-2008, 01:17 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
"How have things been going for you? Haven't seen...

"How have things been going for you? Haven't seen you around these parts too much lately."

I'm an internet junkie, I check TurboBricks daily, always looking to see what others are up to. I'm...
Forum: performance & modifications 08-13-2008, 09:56 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
BDKR, In the above quote, the link to the...

BDKR,
In the above quote, the link to the article by Jim McFarland
is broken, here's a couple of good links:

combustion1 (http://www.pumpgastech.com/combustionlecture.pdf)

combustion2...
Forum: performance & modifications 06-30-2008, 03:25 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
One primary reason this thread has had 57,820...

One primary reason this thread has had 57,820 views is people find it interesting, most of the people that have tried this like the results. Why does this bother the people that don't see the...
Forum: performance & modifications 06-29-2008, 11:57 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
It think it's the best way to monitor small...

It think it's the best way to monitor small changes in combustion. I have no experience, however I read a good bit about Engine Tuning Using Combustion Pressure Data from tfxengine.com...
Forum: performance & modifications 06-29-2008, 10:49 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
poulson01, no experience with this type of...

poulson01, no experience with this type of engine, however it looks to me like with that much squish area the engine would respond better with multiple grooves

Trevor Heath did up a nice web page...
Forum: performance & modifications 03-26-2008, 07:43 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Hi lammmy, Yes, your not bashing it at all,...

Hi lammmy,
Yes, your not bashing it at all, like the message you posted earlier. Yours is a great approach. Curiosity is what got me involved with this several years ago. Besides, it will be nice...
Forum: performance & modifications 03-26-2008, 01:25 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Anyone interested in a decent conversation about...

Anyone interested in a decent conversation about engine performance?

Multipoint ignition is something very different from engine knock. If indeed they where one and the same, running two spark...
Forum: performance & modifications 03-25-2008, 07:49 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Just thought both sides of this ongoing argument...

Just thought both sides of this ongoing argument might enjoy this:


"THE TOP TEN REASONS MYTHBUSTERS WON’T TEST SOMENDER SINGH’S CYLINDER-HEAD GROOVES:

No. 10: ‘Groove’? That is so Sixties.
...
Forum: performance & modifications 03-19-2008, 10:56 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Volvo owners are the most active group discussing...

Volvo owners are the most active group discussing their experiences with grooving cylinder heads, I have enjoyed the discussion. Rather than let this turn ugly, I'm going away for a while. I...
Forum: performance & modifications 03-19-2008, 10:23 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
I didn't dismiss the results, what I'm saying is...

I didn't dismiss the results, what I'm saying is I don't consider this to be a good example to base an opinion on. Actually I did something similar with my Suburban. I raised the compression too high...
Forum: performance & modifications 03-19-2008, 09:34 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
kildea, I read some of your old posts, it looks...

kildea,
I read some of your old posts, it looks like you made many different changes to an engine that has relatively high cranking compression for a turbo. I would not consider this a good example...
Forum: performance & modifications 03-19-2008, 08:32 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
kildea, What was done and what were the...

kildea,
What was done and what were the results?

aussyvolvo,
On that picture you question, someone else did the dimples, I have read
this helps with eliminating fuel wash in the area, others...
Forum: performance & modifications 03-18-2008, 01:17 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
aussyvolvo, Yours is a great idea, that is to...

aussyvolvo,
Yours is a great idea, that is to develop my own web space. Here's a preview, three basic layouts.

1. Single groove pointed at the plug (recommended to me by Somender Singh;
2....
Forum: performance & modifications 03-17-2008, 09:19 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Some were customers (I'm a cylinder head porter),...

Some were customers (I'm a cylinder head porter), some my own, others I did for people just because I like learning about this kind of thing.

My preference would be to do testing with a five gas...
Forum: performance & modifications 03-17-2008, 07:16 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
http://www.improveverywhere.com/images/synch26.jpg

http://www.improveverywhere.com/images/synch26.jpg
Forum: performance & modifications 03-17-2008, 07:12 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Proper testing would take equipment that I don't...

Proper testing would take equipment that I don't have.
Forum: performance & modifications 03-17-2008, 07:08 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
I like the way the groove outlet blends in with...

I like the way the groove outlet blends in with the curve of the chamber, never tried this my self but it should work great. You have chosen a good angle, cut more in a somewhat parallel to the...
Forum: performance & modifications 03-17-2008, 01:56 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Yes me included; when you accomplish near...

Yes me included; when you accomplish near complete combustion, the oil runs substantially cleaner. When I ask people at our race track what they like most about their modified engine, that’s what...
Forum: performance & modifications 03-17-2008, 01:20 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Wow, things are getting exciting here. I lost...

Wow, things are getting exciting here. I lost track of how many engines I have grooved, in excess of 50 I suppose. Mostly high performance N/A V8s. What I like best is the improved engine performance...
Forum: performance & modifications 02-27-2008, 07:43 AM
Replies: 47
Views: 11,340
Posted By automotivebreath
A slapper bar suspension will lift the back of...

A slapper bar suspension will lift the back of the car radically like this 67 Camaro. With this set-up it's important to modify the suspension travel to eliminate suspension extension limitations.
...
Forum: performance & modifications 02-26-2008, 11:52 PM
Replies: 47
Views: 11,340
Posted By automotivebreath
One of the most knowledge people on the subject...

One of the most knowledge people on the subject of drag racing suspensions is Billy Shope. Luckily he is willing to share his knowledge, read more:

MOSTLY SUSPENSIONS...
Forum: performance & modifications 02-25-2008, 10:38 PM
Replies: 47
Views: 11,340
Posted By automotivebreath
The best place to start is with the front...

The best place to start is with the front suspension. Replace the front springs with a tall springs made for drag racing, check moroso and find something that is close to the Volvo. Replace the front...
Forum: performance & modifications 02-18-2008, 12:52 AM
Replies: 950
Views: 405,199
Posted By automotivebreath
Hi Telvm, It looks like oil is getting into the...

Hi Telvm,
It looks like oil is getting into the cylinders creating a thick boundary layer resulting in the clean areas where combustion is incomplete. Check valve guides, valve stem seals and...
Forum: performance & modifications 02-14-2008, 09:35 PM
Replies: 126
Views: 24,686
Posted By automotivebreath
I port a lot of LT1 cylinder heads, that's one...

I port a lot of LT1 cylinder heads, that's one impressive engine. IMO the best 23 degree Chevy engine ever produced.
Forum: performance & modifications 02-13-2008, 02:13 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Chris_R, The idea of the rounded edges makes...

Chris_R,
The idea of the rounded edges makes sense to me and other that have tried it say it works well. I haven’t tried this so I can't say it works for sure.

Jacob,
You belong to the...
Forum: performance & modifications 02-13-2008, 12:10 AM
Replies: 950
Views: 405,199
Posted By automotivebreath
All I did was the grooves, Mike Holler (MPGMike)...

All I did was the grooves, Mike Holler (MPGMike) did the porting, dimples and rounded the edges of the squish pads.
Forum: performance & modifications 02-12-2008, 08:24 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Not sure if you saw this one I did for SSheen ...

Not sure if you saw this one I did for SSheen

http://members.cox.net/rllc/SSheen%203.jpg
Forum: performance & modifications 01-12-2008, 12:04 AM
Replies: 950
Views: 405,199
Posted By automotivebreath
I'm very pleased with results from angled grooved...

I'm very pleased with results from angled grooved engines. There is some good
discussion on Vizard's site also.

gofastnews...
Forum: performance & modifications 10-08-2007, 06:50 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Here's some reading on the dimples from Jim...

Here's some reading on the dimples from Jim McFarland

combustion (http://members.cox.net/rllc/combustionlecture%20r1.pdf)
Forum: performance & modifications 10-08-2007, 01:12 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Grooves pointing at the exhaust valve is one of...

Grooves pointing at the exhaust valve is one of my hair brain ideas, this is where the flame kernel develops because of flame stretch related to large scale in cylinder flow. With the heat of the...
Forum: performance & modifications 10-07-2007, 08:37 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
I just grooved a cylinder head that is somewhat...

I just grooved a cylinder head that is somewhat similar to the Volvo. The head was prepared by Mike Holler (MPGMike) for Scott Sheen's turbo charged street car. Mike used all of his tricks in attempt...
Forum: performance & modifications 10-03-2007, 06:46 AM
Replies: 950
Views: 405,199
Posted By automotivebreath
Firemangtp, The manufacturer didn't give you...

Firemangtp,
The manufacturer didn't give you much squish area to work with. Your proposed groove layout will work just fine.
Forum: performance & modifications 09-27-2007, 01:14 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
I cut the grooves parallel with the deck surface...

I cut the grooves parallel with the deck surface mainly to avoid cutting through. (Most of the stuff I do has a large squish area, cutting on much of an angle would make them rather deep.) Then with...
Forum: performance & modifications 09-18-2007, 06:08 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
I did some work to set up my crude homemade mill...

I did some work to set up my crude homemade mill to cut curved grooves. I was able to cut some but have never put any into a engine.

Somehow I got sidetracked cutting multiple parallel grooves...
Forum: performance & modifications 09-17-2007, 10:36 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Right or wrong, you and I are on the same page. ...

Right or wrong, you and I are on the same page.

I believe your engine will love it!
Forum: performance & modifications 09-09-2007, 04:33 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Hi Morten, Of the three choices I like Cyl. 3...

Hi Morten,
Of the three choices I like Cyl. 3 also, this should work real nice. Going with the same mind set, adding a third groove on the large squish pad should provide additional mixture motion...
Forum: performance & modifications 08-10-2007, 12:22 AM
Replies: 950
Views: 405,199
Posted By automotivebreath
OEM should take note. With piston skirt size...

OEM should take note. With piston skirt size dwindling to reduce engine friction, piston slap has become common. GM says, don't worry about it, it will go away after the engine warms up!
Forum: performance & modifications 07-26-2007, 12:07 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Yes, I did grooves in heads that were used with a...

Yes, I did grooves in heads that were used with a small roots type blower; ~650 HP SBC . The engine was so radical that no useful information was provided relating the modification to WOT...
Forum: performance & modifications 07-25-2007, 01:32 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
After being involved with this for several years,...

After being involved with this for several years, I have seen all the proof I need. I have lost count of how many engines I have done, 40 - 50 I'm sure. Sometimes the owners have no clue if the...
Forum: performance & modifications 06-09-2007, 07:45 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
This becomes very obvious when inspecting grooved...

This becomes very obvious when inspecting grooved wedge heads after run time. The squish pad on the far side of the plug is very large, sometimes as much as 30% of the bore area. When the piston is...
Forum: performance & modifications 06-09-2007, 12:20 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Hi Les, One thing that I am working on is...

Hi Les,
One thing that I am working on is developing a device designed to simulate squish flow for photographing squish action. This will allow me to "see" how different modifications effect flow...
Forum: performance & modifications 06-08-2007, 09:40 PM
Replies: 950
Views: 405,199
Posted By automotivebreath
Here's a few random thoughts about grooves,...

Here's a few random thoughts about grooves, compression and tight squish.

As for the grooves with a dished piston, the comments above are correct, the benefits can be found but no so pronounced...
Forum: performance & modifications 04-24-2007, 07:28 PM
Replies: 14
Views: 2,001
Posted By automotivebreath
How do the Rollerwave pistons work?

How do the Rollerwave pistons work?
Forum: performance & modifications 04-23-2007, 10:28 PM
Replies: 14
Views: 2,001
Posted By automotivebreath
They are called super squish enhanced combustion...

They are called super squish enhanced combustion pistons designed by Larry Widmer.

http://members.cox.net/andrewjhall/squishies%20VW2.jpg
Forum: performance & modifications 02-27-2007, 08:24 PM
Replies: 33
Views: 9,481
Posted By automotivebreath
TF, I agree totally, the Endyn design is not your...

TF, I agree totally, the Endyn design is not your typical dome piston where the objective is solely to raise the compression ratio. The design focus is on mixture movement for enhanced burn velocity....
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