Slant Six Forum
https://slantsix.org/forum/

Hydro Slant Upgrades
https://slantsix.org/forum/viewtopic.php?t=36399		 Page 1 of 2
Author:  dusterguy225 [ Tue Jul 21, 2009 10:31 pm ]
Post subject:  Hydro Slant Upgrades
I am going to start going through my newly aquired '86 slant, and I want to do some upgrades to it. My budget is about $500, but we all know how budgets can be a bit more flexable than we want :wink: I have no idea what simple/major mods can be done to a motor, I was thinking about having a valve job, and some porting done, maybe a cam, and a dist recurve. Im keeping my super six on too. Can anyone give specs on what parts to use, valve sizes, hydro cam, etc.? I want this to be a mild street motor, while keeping good gas mileage. Any suggestions are appreciated :D
Author:  66aCUDA [ Wed Jul 22, 2009 5:23 am ]
Post subject: 
You can benefit from most of the mods that we normally do, bigger valves, cam, etc. I will caution you to shave the deck or head you need to consider new push rods. I dont know how much you can play without changing them.
Frank
Author:  Aggressive Ted [ Thu Jul 23, 2009 9:28 am ]
Post subject: 
Quote:
You can benefit from most of the mods that we normally do, bigger valves, cam, etc. I will caution you to shave the deck or head you need to consider new push rods.
Or have your cam reground too for taller lift, then you can use the stock push rods. That worked out real well for me. :D
Author:  wjajr [ Thu Jul 23, 2009 12:22 pm ]
Post subject: 
Aggressive Ted:
Quote:
Or have your cam reground too for taller lift
Ok... I can't stand it any longer. I guts to ask; did you fire five shots, or six??? Ooops, that just slipped out, here is the burning question, I'm dead serious here; how dose grinding, the process of removing material, produce a higher lift profile from an existing cam? I understand a custom grind from a blank, I get regrinding to dress an existing surface on a used cam, but a higher lift from a regrind has me scratching my noggin...

Is a fishing ruler used to measure the results?
Author:  emsvitil [ Thu Jul 23, 2009 3:11 pm ]
Post subject: 
Quote:
Aggressive Ted:
Quote:
Or have your cam reground too for taller lift
Ok... I can't stand it any longer. I guts to ask; did you fire five shots, or six??? Ooops, that just slipped out, here is the burning question, I'm dead serious here; how dose grinding, the process of removing material, produce a higher lift profile from an existing cam? I understand a custom grind from a blank, I get regrinding to dress an existing surface on a used cam, but a higher lift from a regrind has me scratching my noggin...

Is a fishing ruler used to measure the results?
A cam lobe is a lobe superimposed over a circle of given diameter (base circle)

If you make the base circle smaller, you make the difference between the base circle and the tip of the lobe bigger.
Author:  Valleyant [ Thu Jul 23, 2009 3:51 pm ]
Post subject: 
Go to the search function and put in: Regrind Cam?
there is a good picture that explains it in the thread....nico
Author:  dusterguy225 [ Thu Jul 23, 2009 9:58 pm ]
Post subject: 
I could regrind the cam, but isn't the factory hydro cam weak? Is there any performance hydro cams out there (Ersons are solid), or should I stick with the earlier solid lifters?

What are good valve sizes for a street motor too? Also, how do you recurve a distributor?
Author:  66aCUDA [ Fri Jul 24, 2009 6:53 am ]
Post subject: 
By "weak" we mean that it doesnt produce much power. Not that it is physically weak. It can be reground just fine.
Frank
Author:  6shotvanner [ Fri Jul 24, 2009 8:28 am ]
Post subject: 
I used a CompCams 264H in my build and performance?no,pulls and pulls and just keeps winding?yes. It's basikly an RV grind which is fine for my van,however my next build will be solid cam/lifter as there is so much more available both off the shelf and custom grind.My 2cents 8)
Author:  Aggressive Ted [ Fri Jul 24, 2009 11:53 am ]
Post subject: 
wjajr,
Quote:
Aggressive Ted:
Quote:
Or have your cam reground too for taller lift


Ok... I can't stand it any longer. I guts to ask; did you fire five shots, or six??? Ooops, that just slipped out, here is the burning question, I'm dead serious here; how dose grinding, the process of removing material, produce a higher lift profile from an existing cam? I understand a custom grind from a blank, I get regrinding to dress an existing surface on a used cam, but a higher lift from a regrind has me scratching my noggin...

Is a fishing ruler used to measure the results?
No, no fishing ruler........actually the good Doctor mentioned it to me as an alternative since I was building a torquer to pull the 2.76 ratio 8 3/4 posi in a heavy car.

For $35 Delta Cams in Tacoma, WA will regrind your stock cam into just about anything you want. I figured since it was already well seasoned and in excellent shape from the synthetic oil I would do the regrind and skip buying shorter push rods.
Since I was building a stump puller, torque and mileage motor I went with the Erson 254 .435 lift profile. When they remove that much from the base of the lobe it compensates for the .100 milling and makes the nose taller.
I took about half off the block and half off the head. The result is you can use the stock push rods. Call me thrifty, cheap, etc., the extra money I saved went to porting and balancing the engine.
The cam pulls like a bad dog till I run out of road......gets great mileage and I can starve it to death with a #56 jet. Running a #612 or #62H on up to a #66 the engine really comes to life. It has excessive torque and power for a 3600 pound car, so I run the #56 jet most of the time. It only takes 3 minutes to change the jet and that's in bad light. Four screws and your there.....

I would recommend a regrinding the cam to save a few bucks if your doing a near stock rebuild. If you have a proven good running cam, why not? :)
Author:  wjajr [ Fri Jul 24, 2009 12:38 pm ]
Post subject: 
emsvitil:
Quote:
A cam lobe is a lobe superimposed over a circle of given diameter (base circle)
Palm of hand aggressively contacting my forehead moment department.

Since posting this question twenty four hours ago, and not having access to a PC until just now, I had one of those: "Oh Jezz What a Dope" moments around supper time yesterday... What can I say, not unlike the six minute reaction time of a jelly fish, my brain seams to have become increasingly incrusted later in life it seams.

Thanks emsvitil for being gentle with your explanation. Yesterday while preparing the evening meal of a nice 1/2 pound juicy cheese burger, toasted buns, with a mayo moisture barrier, on the grill, an image of that smaller radius opposite of the lobe popped into my mind's eye. That is when the open hand landed just north of my nose.... But, Hey, I did work in a Dirty Harry line!
Author:  wjajr [ Fri Jul 24, 2009 12:57 pm ]
Post subject: 
Aggressive Ted:
Quote:
The cam pulls like a bad dog till I run out of road
Ted do you have any idea what kind of torque & HP you are developing with your state of tune? Having lived with a loping performance cam of unknown specification driving a 3.55:1 8 3/4 Suregrip, I have wondered if low rpm torque, driving a higher geared rear end, would be a better fit for an inline long stroke 225 that dose not like a ton of rpms compared to a V configuration engine of the same displacement.

I wish I had a chance to ride in or drive a car with your numbers to get a feel for how it performs compared to the rigging that I have. Perhaps I can find a few numbers on the racing board to digest.
Author:  Aggressive Ted [ Fri Jul 24, 2009 1:14 pm ]
Post subject: 
wjajr,

Yes, 160 HP with a #612 jet. Doc has built and this combination many times over the years and can vouch for the build. He is a small number cam guy, less wear and tear to get the job done. For a commuter and a hauler it makes perfect sense.

I will be racing this set up some more and will go through the two barrel setups and four barrel. I am not trying to build an all out race car, just curious how far a torque set up will go in terms of the quarter mile. If, I could get to 16 or 17 seconds I would be extremely happy. It has already proven its worth as a good daily driver that can spin the tires. I am just curious at how far low end torque will take you down the track. Not many folks ever address that perspective. It seems the focus is always a light car, high lift and wide overlap cam spun at 5,000 or more.........

My goal is for about 225HP when finished tuning.
Author:  Reed [ Fri Jul 24, 2009 2:01 pm ]
Post subject: 
Out of curiosity, can anyone tell me if you can use a mechanical lifter profile on a reground hydraulic lifter cam?
Author:  dusterguy225 [ Fri Jul 24, 2009 11:01 pm ]
Post subject: 
So I could have a stock hydraulic cam reground to the E254 specs and get good results? I would like to stick with mechanical, but I just want to have a complete motor to swap, I dont want to pull parts out of my car because it is my only one, and I dont have a spare at the moment. Even though it would be cheaper.

What are the E254s specs?
Page 1 of 2 All times are UTC-08:00
Powered by phpBB® Forum Software © phpBB Limited
https://www.phpbb.com/