I am going to port a set of LT1 heads, and found this picture

I havent seen another head that looked like that?!?! Is that what they should look like for the best results?

 

Also, I ve read not to remove any material from the "short side radius", where is this and why??? (says just to polish it)

 

This explains the diffrent parts of th intakeport and how to port heads. http://www.sa-motorsports.com/diyport.htm. Diffrent people have diffrent ways of porting its like art everyone thinks there way is the best, or at least should if there serious. pro stock heads and any big buck engine usualy has a air foil shape coming up to the valve guide look around online i know vortec heads have them stock.

 

You want swirl in the combustion chamber, not in the intake Go to the store and pick up the magazine or log onto www.circletrack.com. They have done a 3 month long study on port velocity, shape, swirl and tumble

-Shannon

 

Would this be the current issue?

 

Dont know whats the best. But if you look at http://home.koping.net/u3243a/Topparna.htm
you could see my lt1 heads ported by a pro but not max ported, the reason for that was that he ment that its not worth the cost to do a full job on the orginal castings.

This job was most hp/money acourding to him.

Any coments on the job?

 

Rather true, figure its 50% more work or so for the last 10% in flow, so the cost goes up when you "max out" anything.

 

Actually I think it was a few months ago. If you go to www.circletrack.com and look through their tech articles I think it's listed under the transition from winston cup to short track technology series.

They have a ton of informative info on there, thats why i've had a subscrition for about 4 years now They are more of a techy magazine

Sorry Lisa33, IMO those heads look like crap. The exhaust ports should be mirror smooth and the intakes should have been worked way more than that. I'm not sure what he means by it's not worth the money to port stock castings, expecially since there aren't any other castings out there any different.

-Shannon

 

You misread that one, but I have to agree that looks like a BAD home port. I have rarely seen anything that rough. Intake doesn't get polished, but the exaust should be smooth and/or polished. Whoever worked them didn't spend much time on them at all. Hope everything works out whatever you do with the heads.

 

Yeah I'm gonna have to agree with NOMAD. I bet cha they barely flow more than a stock head. The roofs of the intake ports are still slanted and nothing is smooth. I don't think a pro did them. If he is then he probally only spent about 30 min on them. Looks more like a very bad home port.

 

I'm gonna go against the grain and state the 3 of you missed the scenario Lisa presented. By that , although the port job is not great, I present that was not the intent of the finished product. She stated that it was not fully ported, but reading what she notes, the guy obviously gave her a deal she couldn't refuse. The minimum amount of work for a minimum cost, which translates to most gain for the lest effort/cost. So why crucify the job? She got what she paid for, and she undoubtedly is aware of that. If a person gave you 30 minutes to do a job, (based on what the person gave you for compensation) what areas would you concentrate on? Down and dirty.

 

Ok
Thats not fun news. Didnt know what í should expect i tried to say that he should put more work in it (to a higher cost ofcourse) but he didnt want to do that (not nessesery) so what should i say, the guy have ported heads for 30 years, Topfuels, bikes and racing cars,He have a god reputation, But i dont think he have done many lt1 heads and thats the problem here around its not many people ho drives lt1 and wery few of us try to get more hp from them.

about the finish in the exhaust port so it wasnt that bad as it looks think the cameras flash fool us, it was smoth when you put the finger on it , but definitly not polished. (new picture)

About the 30 min i can only agree..

about casting: He had an idea about convert a set of brodrix heads to make serious power.

And it was a chep work, hadnt expect a full work for that money.

Hope to try it on the track soon to get a timeslip.

I run it with datamaster today the afgs was 317 and the injectors dc was 90%. so that cant be to bad (340rwhp?)have read that afgs*1.1=rwhp (dont now if its true)Need backup on that
and it runs much better than before and i dont think the cc305 is the only raeson.

But if thats only the cam i must recomend it.

 

Lisa are your heads back on the engine yet? If not contact nighttrain66 (Lloyd) from this board, gives excellent port work for very reasonable prices.

 

Yes the heads are on and its running fine, Se replay above.
And thanks for the tip but i live in sweden so i dont think its an option.
Like to here what you think about the afgs*1.1=rwhp,
understand that its not exact but is it for A4 or M6.
thanks

 

lisa-
as long as you didn't pay much for that work, it is fine. he hit all the major areas. althought I wouldn't bolt a set of heads with that little work on my car(why not go a little farther?).. there is nothing wrong with them.