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Search found 275 matches

by Xnke
Tue Sep 14, 2021 8:30 am
Forum: Engine Tech
Topic: Valve Guide Clearance
Replies: 11
Views: 546

Re: Valve Guide Clearance

I think you're right Bill. I've found some guides from a Jaguar that are the correct length, OD, and are a .312" ID, but I'd rather be around .309 when they go in so I can ream and hone or just hone, if they're close. I might just buy some bar and make some. They're not difficult, any machinist who...
by Xnke
Mon Sep 13, 2021 3:46 pm
Forum: Engine Tech
Topic: Valve Guide Clearance
Replies: 11
Views: 546

Re: Valve Guide Clearance

I think you're right Bill. I've found some guides from a Jaguar that are the correct length, OD, and are a .312" ID, but I'd rather be around .309 when they go in so I can ream and hone or just hone, if they're close. I might just buy some bar and make some. They're not difficult, any machinist who ...
by Xnke
Mon Sep 13, 2021 11:43 am
Forum: Engine Tech
Topic: Valve Guide Clearance
Replies: 11
Views: 546

Re: Valve Guide Clearance

They're LS 862 truck heads, the guides and seats both will need to be removed and refitted due to a LOT of welding being done. The press fits will be significantly distorted after welding and straightening. Once new seats and guides go in, titanium intakes and stainless exhaust valves will be fitted...
by Xnke
Mon Sep 13, 2021 8:27 am
Forum: Engine Tech
Topic: Valve Guide Clearance
Replies: 11
Views: 546

Valve Guide Clearance

Looking at fitting Bronze guides in an aluminum head. It needs to be done, however the guides available are what I would consider to be "at the limit" as-delivered. The valve stem is 0.310" diameter, and the guides, as delivered, before installing, are 0.313" diameter as per the supplier. This would...
by Xnke
Sat Sep 11, 2021 2:16 am
Forum: Engine Tech
Topic: Selecting Valve Seat material for Ti Valves
Replies: 20
Views: 940

Re: Selecting Valve Seat material for Ti Valves

No coating on the head, just a moly coated stem. There were valve float issues, as the retainers show a bit of rubbing on the inner spring seat. The valves were run for 180 laps on Sunday, October 20, 2002 at Memphis Motorsports Park, in car #25, driven by Bobby Hamilton Jr. He started in position 3...
by Xnke
Thu Sep 09, 2021 10:56 pm
Forum: Engine Tech
Topic: Selecting Valve Seat material for Ti Valves
Replies: 20
Views: 940

Re: Selecting Valve Seat material for Ti Valves

Well-They're here! The stems mic out showing absolutely no wear, which is good after 296 miles of run time. The valve seats are roughed up pretty bad though on all but two valves. These retainers are huge compared to LS retainers, by the time I cut away the large OD to get them down to size (the inn...
by Xnke
Tue Sep 07, 2021 8:21 pm
Forum: Engine Tech
Topic: Selecting Valve Seat material for Ti Valves
Replies: 20
Views: 940

Re: Selecting Valve Seat material for Ti Valves

I am not sold on the need for bronze seats just yet, at least for the intake valve. Even GM is running coated Ti intakes on powder metal seats, I just need to get Durabond to actually pick up a phone. (Or Del-West, or Victory...No one answers a phone anymore!) Hopefully I'll be able to put a few tho...
by Xnke
Tue Sep 07, 2021 11:42 am
Forum: Engine Tech
Topic: Selecting Valve Seat material for Ti Valves
Replies: 20
Views: 940

Re: Selecting Valve Seat material for Ti Valves

Have you verified they will recoat used parts? Yes, they will after they have been machined. They will not remove the coating, you must do that yourself and verify that the parts will be within tolerance. I have *heard* that ductile iron seats are OK for Ti intake valves, provided they are coated c...
by Xnke
Tue Sep 07, 2021 9:36 am
Forum: Engine Tech
Topic: Selecting Valve Seat material for Ti Valves
Replies: 20
Views: 940

Selecting Valve Seat material for Ti Valves

Scored some Del West Ti intake valves, locks, and retainers for the LS-V4 project. They're Ford NASCAR take offs, 296 miles on them. Only 7 valves out of the 8, but I only need 4 anyway. I'll need to shorten the stems 0.411", but we'll see when they get here how much really needs to come off. The va...
by Xnke
Wed Sep 01, 2021 8:26 am
Forum: Engine Tech
Topic: Camshaft selection 60deg V6
Replies: 9
Views: 955

Re: Camshaft selection 60deg V6

Go for the 219-220 degree intake, 225-228 degree exhaust. I assume you've looked at the head flow numbers, and noticed that your aluminum heads flow much better on both the intake and exhaust than the iron ones in that article. You don't need as much exhaust bias for the aluminum heads, as the exhau...
by Xnke
Mon Aug 09, 2021 11:31 pm
Forum: Race Cars & Parts - For Sale or Wanted
Topic: Looking for a damaged aluminum LS block
Replies: 2
Views: 197

Re: Looking for a damaged aluminum LS block

That would be Ideal! I think I remember where lebanon is. I'll PM you here and we'll get it worked out.
by Xnke
Sat Aug 07, 2021 2:01 am
Forum: Race Cars & Parts - For Sale or Wanted
Topic: Looking for a damaged aluminum LS block
Replies: 2
Views: 197

Looking for a damaged aluminum LS block

Need an aluminum LS block to cut up for my students. We need the front two cylinders, and the rear two cylinders, and the four in the middle don't matter because we're going to cut the block up for a display. I'm in Bowling Green KY, have some feelers out at GM as they sponsor the school already but...
by Xnke
Sun Aug 01, 2021 4:14 pm
Forum: Engine Tech
Topic: Camshaft selection 60deg V6
Replies: 9
Views: 955

Re: Camshaft selection 60deg V6

Go with the Crane HMV or Z profile grinds. I used to have a chart posted here back when I did my supercharged 3.4L build in the S10. GM used to ship the 3.4L crate motors for S-10 pickups with a Crane 260H grind, which was the H-204/2847 lobe profile on both the intake and exhaust. That supercharged...
by Xnke
Sat Jul 24, 2021 10:55 pm
Forum: Engine Tech
Topic: 200ci Ford 6 Pushrod Length issues?
Replies: 10
Views: 533

Re: 200ci Ford 6 Pushrod Length issues?

X2 with the above! Easy peesy and dirt cheap to your remaining funds! I wanted to ask, what valve burned on you and if you know why? #5 Exhaust valve was burned with 1/8 of the valve head gone when we bought the car and brought it home. I drove it 12 miles home, and we did plenty of 2 gear burnouts...
by Xnke
Sat Jul 24, 2021 10:38 pm
Forum: Engine Tech
Topic: 200ci Ford 6 Pushrod Length issues?
Replies: 10
Views: 533

Re: 200ci Ford 6 Pushrod Length issues?

The 1st thing to do is simply check that the rocker on each cylinder at TDC on compression stroke can be held back against the pushrod to bleed the lifter down. If you get any clearance its not pushrod length. Were the rest of then valves and seats recut? Are you sure you have the cylinders paired ...