Headwork for 300HP D??
11-07-2007, 09:30 AM
#11
!! UNCONFIRMED EMAIL !!
Join Date: Nov 2005
Posts: 1,876
Re: Headwork for 300HP D??
Originally Posted by absolutezroo
Check just to seat if you have a good seal. With valves temp. installed fill combustion chamber with kerosene and see if it holds.
Also the valve guides are wear items as well this test is done w/o the valve spring installed and wiggling it back and forth while it is in the open position.
I decided against the porting, If I were to do head work it would be a cam and springs.
Porting an 3 angle, or 5 angle jobs are pretty costly, but if you want your head to flow Xenocron has a guy that does it for a very reasonable cost.
11-08-2007, 10:53 PM
#14
3.0 BAR
Join Date: Dec 2005
Posts: 2,081
Re: Headwork for 300HP D??
Just get some valve grinding compound, a little plunger tool, and lap the valves yourself, it will cost you like $15 or less for the plunger and valvegrind. If there's a major problem with one of the valve's or seats you will see it, and it provides a good seal.
11-08-2007, 11:45 PM
#15
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: Headwork for 300HP D??
Originally Posted by absolutezroo
I had my z6 head ported and polish (by a knowledgeable machinist), valve seats re-done, and a broken valve cover stud repaired for 220bucks
Dude that is uber cheap. Any pics of the head. I couldnt imagine anyone doing more than a simple gasket match for that price
11-09-2007, 12:06 AM
#16
3.0 BAR
Join Date: Mar 2004
Posts: 1,729
Re: Headwork for 300HP D??
Originally Posted by 1991civicsi
You can do the kerosene test to check the valve seats, or the machine shop can do it for you. Just make sure the valve springs are installed.
Also the valve guides are wear items as well this test is done w/o the valve spring installed and wiggling it back and forth while it is in the open position.
I decided against the porting, If I were to do head work it would be a cam and springs.
Porting an 3 angle, or 5 angle jobs are pretty costly, but if you want your head to flow Xenocron has a guy that does it for a very reasonable cost.
Also the valve guides are wear items as well this test is done w/o the valve spring installed and wiggling it back and forth while it is in the open position.
I decided against the porting, If I were to do head work it would be a cam and springs.
Porting an 3 angle, or 5 angle jobs are pretty costly, but if you want your head to flow Xenocron has a guy that does it for a very reasonable cost.
Stock head is fine for 300, so are the sleeves. Past 400 you will probably want to look into a cam and the associated valvetrain, doing it before you hit 400 is just going to give you a nicer powerband, won't help you past any limits.
I think 50 trim t3/t4s are a great D street turbo, and I also love my HY35.
11-09-2007, 06:25 PM
#17
1.5 BAR
Join Date: May 2004
Location: Westminster,MD
Posts: 1,032
Re: Headwork for 300HP D??
Chris,
That was what he told me. I'm going to be picking up the head in a few days. I'll get pictures of it so that I can get some reliable input. I've never had a head ported before, so OG insight would appreciated to make sure he does what he said.
~SCott~
That was what he told me. I'm going to be picking up the head in a few days. I'll get pictures of it so that I can get some reliable input. I've never had a head ported before, so OG insight would appreciated to make sure he does what he said.
~SCott~
11-09-2007, 07:14 PM
#18
1.5 BAR
Join Date: Mar 2005
Posts: 945
Re: Headwork for 300HP D??
in all seriousness, what was the comment about purple power? can i dunk some parts head in a bucket of purple power can clean them really good? ive only used the stuff on my driveway, i dont want to waste it if its not going to clean the head GOOD.
11-09-2007, 08:07 PM
#19
3.0 BAR
Join Date: Mar 2004
Posts: 1,729
Re: Headwork for 300HP D??
Originally Posted by SQ is the SQUAD
in all seriousness, what was the comment about purple power? can i dunk some parts head in a bucket of purple power can clean them really good? ive only used the stuff on my driveway, i dont want to waste it if its not going to clean the head GOOD.
