Re: 420 going on the dyno next couple days
[Re: biff426]
#2751799
03/14/20 11:25 AM
03/14/20 11:25 AM
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Joined: Feb 2011
Posts: 1,454 Glendora Ca.
Just-a-dart
pro stock
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pro stock
Joined: Feb 2011
Posts: 1,454
Glendora Ca.
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Made a couple light pulls but the puke tank is getting a ton of oil through the vacuum pump. I have the Ritter intake and have the pickup for the vacuum pump coming out of the oil fill. The valve covers are not very friendly for a fitting. Who has ever used a vac pump on one of these and where do you put the fitting. We leaked the engine and it leaks 4% cold so I don't think it's that the engine has blowby. This thing is pushing a bunch of oil in the higher RPMs. I also use a Ritter intake and a vac pump, very little oil in the tank. I drilled and tapped the manifold just under the oil filler and drilled and tapped the other side of the intake at the passage in the head. I put a tee in the vacuum line and pull from both sides on the engine. This way I cut down on the air speed and it does not pick up as much oil.
"Just a Bracket car dressed up like a streetcar"
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Re: 420 going on the dyno next couple days
[Re: fbs63]
#2752004
03/14/20 09:32 PM
03/14/20 09:32 PM
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Joined: Apr 2005
Posts: 936 Deland, Florida
biff426
OP
super stock
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OP
super stock
Joined: Apr 2005
Posts: 936
Deland, Florida
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Sorry to hear of your family issues. When does it start to float? How high are you wanting to spin it? Maybe the lobes are too aggressive? It starts around 5400 and just gets worse. Funny thing is it didn't do it on the first couple pulls. Almost like the lifters pumped up. I really think it is still a lifter preload issue. It is so hard to get a really accurate measurement with the way these engines are setup. It sucks adjustable rockers cost so much. The cam is pretty aggressive so it is not helping. With 5 hits and none of them really hard hits all under 6500 it has already scuffed the lash caps pretty bad so it is not happy. The good thing is with the fitting in the valve cover I am getting hardly nothing in the breather tank. The geometry is really not the best after looking at the lash caps the pattern is from bottom to top of the cap. The rocker is srubbing the entire lash cap. The rocker shaft seems like it needs to be shimmed up from the pedestal and it would be better. I would like to turn it 7200-7400. I am not sure how the T&D stuff installs but it would be nice if you could shim the shafts with the T&D setup.
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Re: 420 going on the dyno next couple days
[Re: biff426]
#2752198
03/15/20 04:04 PM
03/15/20 04:04 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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I don't see how you can do a double spring with the stock rockers so it looks like double springs and rockers. Piston to valve is really tight on the intake side and I just don't have the room for a Ti valve with the additional margin. I have the valve pockets as deep as they can go. When you start getting away from stock these engines are pretty tricky. I may just sacrifice the power and put a milder cam in it. I just don't have the time to keep going down this road. I would assume Craig @Thitek simply specs a beed lock groove lower on the stem to run a double spring retainer that works with stock rockers. Even the 2.16 valve that Thitek uses is extremely heavy compared to stock Apache valve
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: 420 going on the dyno next couple days
[Re: biff426]
#2773084
05/10/20 08:57 AM
05/10/20 08:57 AM
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Joined: Nov 2003
Posts: 1,839 NW Indiana
fbs63
top fuel
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top fuel
Joined: Nov 2003
Posts: 1,839
NW Indiana
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Did you test the seat and open pressures of those springs? Its possible to get a bad batch. I had some Manley NexTek that were bad.
Last edited by fbs63; 05/10/20 08:58 AM.
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Re: 420 going on the dyno next couple days
[Re: fbs63]
#2773119
05/10/20 10:32 AM
05/10/20 10:32 AM
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Joined: Apr 2005
Posts: 936 Deland, Florida
biff426
OP
super stock
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OP
super stock
Joined: Apr 2005
Posts: 936
Deland, Florida
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Did you test the seat and open pressures of those springs? Its possible to get a bad batch. I had some Manley NexTek that were bad. We tested the springs and they are pretty much spot on 140 on the seat and 400 at max lift. I am thinking about going to the hollow stem valve maybe. They are like 12 grams lighter. I am not sure about 400 open with hollow valves. Or just doing a dual spring. The problem is I can't seem to find all the pieces (locks, Retainers) that will work with the spring diameter I think I need. I have 3/8 heavy wall pushrods in it and the lifters are heavy. I have always been told the weight on the cam side of the rocker is not a big factor. I would really like to get some input from someone who has run this 2.18 valve over 7000 RPM I can't be the first person to do this. I don't have ANY piston to valve to put a thick margin titanium valve in it. Options are limited on these things. If anyone has any input I am all ears.
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Re: 420 going on the dyno next couple days
[Re: biff426]
#2773390
05/11/20 06:53 AM
05/11/20 06:53 AM
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Joined: Jan 2003
Posts: 3,871 Smyrna, South Carolina
STEFF
master
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master
Joined: Jan 2003
Posts: 3,871
Smyrna, South Carolina
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Those Harland Sharp Rockers? I have the T & D's and they don't look like that. I'm not running a 2.18 Intake, but I am close, running a Steel 2.165. Don't know the weight but I've routinely spun my motor to 8000 every pass for years with the only issue of trying to get a 3rd season on a set of shimmed solid Hyd. Lifters. One of the Plastic Retainers started getting sloppy and a Lifter was trying to rotate and hurt the Lobe. I also had 3 others where the Roller Needle Bearings were not smooth when spun with your finger. I never noticed any issues when lashing valves or post race inspections. And in fact, it ran it's fastest passes with the hurt lifter and cam. Again, I was going on my 3rd season with them and never inspected them in the off season. Had I been smart and ripped the Heads off to inspect the LIfters, I would have caught it. I will NEVER do that again!! Take it from me, every off season, Rip the Heads off and inspect or better yet, replace the Lifters and the Guides. Cheap insurance. For Spring, I run the Pac 1237X Dbl. Valve Spring on my Thiteks. Next time I have the Heads freshened up, I'm going to go larger on the Intake Valve and change material to Ti. I've also switched to Jesel Dogbone Lifters. I won't be shimming Lifters solid anymore.
Last edited by STEFF; 05/11/20 06:54 AM.
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Re: 420 going on the dyno next couple days
[Re: STEFF]
#2773446
05/11/20 10:32 AM
05/11/20 10:32 AM
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Joined: Apr 2005
Posts: 936 Deland, Florida
biff426
OP
super stock
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OP
super stock
Joined: Apr 2005
Posts: 936
Deland, Florida
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Hey Steff Yes they are Harland Sharps after talking to them a few times I decided to go with their rockers. I was going to shim the lifters I have but what is the deal with the Jesel lifters. Do you need to machine the block to use them? I really didn't want to disassemble the short block. I am thinking I need some more spring but I think Craig uses a custom valve with the lock grooves moved around, these heads from Frankenstein have Manley valves and with a dual spring retainer the valve tip is pretty low in the retainer and it is real sketchy with clearance to the rocker.
Last edited by biff426; 05/11/20 10:32 AM.
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Re: 420 going on the dyno next couple days
[Re: biff426]
#2773489
05/11/20 12:12 PM
05/11/20 12:12 PM
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Joined: Jan 2003
Posts: 3,871 Smyrna, South Carolina
STEFF
master
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master
Joined: Jan 2003
Posts: 3,871
Smyrna, South Carolina
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They make a Dogbone style Lifter with a Steel Guide, They are a Bolt-in in the Block. However, you will need longer pushrods (about 1 1/2" longer) and also have to check pushrod clearance in the head, thru the travel of the valve. The Pushrod Seat in the Lifter is just above the Roller, so it is deep into the Lifter. The reason behind it is to reduce the side load on the Lifter with the seat being deep in the Lifter body, versus being at the top of a stock lifter. Only bad thing about them is cost. They're about $210-230ish per Lifter plus the cost of the Guides at about $330ish for the kit. I lucked out and scored a perfect, low use, used set for a lot less than new. Otherwise I wouldn't have them. Another plus side is they are rebuildable.
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Re: 420 going on the dyno next couple days
[Re: biff426]
#2773518
05/11/20 01:37 PM
05/11/20 01:37 PM
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Joined: Jan 2012
Posts: 1,541 USA
hudsonhornet7x
pro stock
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pro stock
Joined: Jan 2012
Posts: 1,541
USA
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Re: 420 going on the dyno next couple days
[Re: fbs63]
#2773815
05/12/20 10:17 AM
05/12/20 10:17 AM
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Joined: Jan 2012
Posts: 1,541 USA
hudsonhornet7x
pro stock
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pro stock
Joined: Jan 2012
Posts: 1,541
USA
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Very Nice! Who makes those? Don't get the logo. Hi Bob, If you go to facebook and contact Erik Storms he sells them.
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