S.M.B Posted August 4, 2010 Report Share Posted August 4, 2010 low compression is old school, welded up the combustion chambers and then ported the chambers to help swirl pattern. http://i570.photobucket.com/albums/ss142/lowrider01mopar/starionchamber.jpg Link to comment Share on other sites More sharing options...
Technology Posted August 4, 2010 Report Share Posted August 4, 2010 What pistons you gonna run? Link to comment Share on other sites More sharing options...
S.M.B Posted August 4, 2010 Author Report Share Posted August 4, 2010 it has weiseco 8:1's in it Link to comment Share on other sites More sharing options...
ReneRobert Posted August 4, 2010 Report Share Posted August 4, 2010 Have you done any bench flow tests or dyno pulls to check the numbers? Link to comment Share on other sites More sharing options...
Indiana Posted August 4, 2010 Report Share Posted August 4, 2010 Since what you have done is copy the TS Magna head. http://www.sigma-galant.com/viewtopic.php?f=30&t=1986 pictures there of the pistons Now, since they reproduce all the other 2.6 heads, someone needs to just ask those casting those heads to make the TS Magna head if they don't already and then send one of those pistons to JE. If you think the CR is too high, and I do not but it will make for a larger tuning window, all they have to do is deepen the dish or offer different dish depths. That version of the motor was a two year low production model so they may not have that combustion chamber shape but I don't see why they can't change the machining program so they don't remove as much material. Link to comment Share on other sites More sharing options...
S.M.B Posted August 4, 2010 Author Report Share Posted August 4, 2010 no i didnt get it dynoed yet, just did the work yesturday. i just didnt like the 7:1 briggs and stratton low end. now it should have more low end, better responce out of the cam and faster spool for the t3 turbo. the compression should be around 9 - 9.5:1 , also took .040 off the deck and closed the chain guides to tighten it up. i was hopin for 10:1 but after blending its dropped Link to comment Share on other sites More sharing options...
patra_is_here Posted August 4, 2010 Report Share Posted August 4, 2010 what's the benefit of this as opposed to just running 10:1 compression pistons? curious. Link to comment Share on other sites More sharing options...
darthconquest Posted August 4, 2010 Report Share Posted August 4, 2010 so are you going to run race gas? Link to comment Share on other sites More sharing options...
S.M.B Posted August 7, 2010 Author Report Share Posted August 7, 2010 our shop can do this same job to ur head for $300, if anyone would like the work done. thats welded up, hand ported, decked and polished bowl. Link to comment Share on other sites More sharing options...
Funky Phil Posted August 8, 2010 Report Share Posted August 8, 2010 Only $300?!?!?!?! Thats awsome! Im sure it would be a better incentive if people had flowbench numbers. Than they would see what they are getting. Looks good! Link to comment Share on other sites More sharing options...
S.M.B Posted August 8, 2010 Author Report Share Posted August 8, 2010 well my head is ported and polished so the numbers would different from non ported heads with raised compression. the real goal of this is to bump the compression but with how it was done, its also to help swirl as it enters the chamber. swirl u wont really see on a flow bench cuz the swirl is done after it leaves the valve and enters the combustion chamber. i just acquired a side job to change a head gasket on a starion, and after the head was removed i saw it has raised compression but done the wrong way to achieve it. they had milled the block down to zero deck to the piston but also shrunk the deck thickness to only .090 wich is why the head gasket blew from block distortion. so i thought it would be good to offer this service as a way to raise ur compression with out taking a chance on having to throw away ur block. plus the added performance from the swirl pattern Link to comment Share on other sites More sharing options...
NudeLobster Posted September 23, 2010 Report Share Posted September 23, 2010 Interesting indeed...Can your shop port and polish the whole head too? It'd be a paint to order a head, have it shipped, get it to someone to port it, and then ship it to you and back for the ported chambers thanks,-Justin Link to comment Share on other sites More sharing options...
importwarrior Posted October 23, 2010 Report Share Posted October 23, 2010 This is themagna head from Australia. Actually i believe it is from the Astron II.Very similar to your design. I think this is from 1979 or around that year/. http://i139.photobucket.com/albums/q299/I-W/Quest_Parts_and_Info/M9-1.jpg Link to comment Share on other sites More sharing options...
S.M.B Posted October 23, 2010 Author Report Share Posted October 23, 2010 yea thats pretty much the same thing, i wouldnt mind havin that head. saves alot of work lol Link to comment Share on other sites More sharing options...
TainterRacing Posted October 23, 2010 Report Share Posted October 23, 2010 (edited) yea thats pretty much the same thing, i wouldnt mind havin that head. saves alot of work lol Good minds think alike I guess..... Here is my 3 gen Magna head.http://www.26liter.us/forum/Garage/uploads/cache/garage_gallery_484100818.jpg http://www.26liter.us/forum/Garage/uploads/cache/garage_gallery_1053767698.jpg Edited October 23, 2010 by TainterRacing Link to comment Share on other sites More sharing options...
dmyers151 Posted October 23, 2010 Report Share Posted October 23, 2010 Holy hell look at the size of those ports. Link to comment Share on other sites More sharing options...
S.M.B Posted October 24, 2010 Author Report Share Posted October 24, 2010 yep i want that head lol, damn now im gonna have to pull mine off to replicate those intake ports Link to comment Share on other sites More sharing options...
strang3majik Posted October 25, 2010 Report Share Posted October 25, 2010 looks good and I like the thought of upping the compression, but, I want to correct you on one thing... by doing this you are not making it into a swirl port head, nor really affecting the swirl whatsoever. I'm sure flow will be better though...but, the swirl effect will not probably not change as that has nothing to do with what you did. Link to comment Share on other sites More sharing options...
TainterRacing Posted October 25, 2010 Report Share Posted October 25, 2010 looks good and I like the thought of upping the compression, but, I want to correct you on one thing... by doing this you are not making it into a swirl port head, nor really affecting the swirl whatsoever. I'm sure flow will be better though...but, the swirl effect will not probably not change as that has nothing to do with what you did. mmmm the heart shape is what makes it swirl...... will get a better air/fuel Mix Link to comment Share on other sites More sharing options...
strang3majik Posted October 26, 2010 Report Share Posted October 26, 2010 mmmm the heart shape is what makes it swirl...... will get a better air/fuel Mix no, that is not true. Thats a common misconception. What creates the swirl is the shape and design of the intake ports. I just read this about a week ago in a Mopar Performance racing guide for the 2.2L/2.5L. It said that when they came out with the swirl port design on the LA series small blocks, it just so happened to also have a heart shaped combustion chamber to boost compression, and everyone thought (racers/performance magazines) that the heart shaped combustion chamber was what created the swirl, however, they have nothing to do with each other. As I said, what causes the swirl is the shape and design of the intake ports and the way the air/fuel is directed/enters the cc around the valve. It also said that they made a few heads for the small blocks that were swirl that didn't have the heart shape cc. They are swirl "port" heads after all Link to comment Share on other sites More sharing options...
S.M.B Posted October 26, 2010 Author Report Share Posted October 26, 2010 well the guy that did the welding on the head is "greg davis" he is well known in the pro stock drag scene for building his own cylinder heads from a solid chunk of aluminum and sheet metal intakes. real top notch guy, so if he says this also helps swirl pattern im takin his work for it. Link to comment Share on other sites More sharing options...
TainterRacing Posted October 27, 2010 Report Share Posted October 27, 2010 (edited) The way I understand it is they do more then just add compression they ad in getting a better air fuel mix I guess to call it a swil port might not be right but They both get better MPG and all so tend to out flow most other shapes. In the ’80s and early ’90s, combustion chambers began to receive a bit more attention with an attempt to push or move the combustion process toward the exhaust side of the chamber. Heart or kidney-shaped chambers began to appear that not only improved flow out of the intake valve, but also attempted to encourage mixture movement toward the exhaust side of the chamber. Angled spark plugs also began to appear with some regularity accompanied by information that suggested that the spark plug could improve combustion by beginning the event from a more advantageous position. Edited October 27, 2010 by TainterRacing Link to comment Share on other sites More sharing options...
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