|
Another customary issue here is that most of the time money is only a slight object to the final goal. :)
Of course money is an issue when your talking about really high dollar stuff, Shelby block, SOHC, Webers, etc (eke)! But I'm talking about the normal everyday guy trying to do his Cobra on a budget. Like in this thread where were trying to preserve capital by keeping the useable parts and upgrading where we need to. Versus, throw it all out and start over from scratch. Well, sometimes that is the best strategy, but more consideration should be given to conservation. Not all of us are Mr. Money Bag. In MY case I pretty much did "throw it all out" and start over. Total overhaul because I didn't like the way the engine was built with high compression being the fundamental issue. BUT, I built it myself, savings thousands of dollars. I spent "enough" money where I needed to (custom pistons primarily) and saved money where I could (flat tappet cam). No way I could afford Gessford or Keith to do it for me. I could have saved even more with "off the shelf pistons", but Gessford prompted me to go custom to address the quench problem, a good call, I took his advice. |
Quote:
Eke? That would be great effort for little result. I picked up 50-60 ft/lbs over the most aggressive hydraulic roller with no loss of drivability. So, "eke" would be inaccurate based on gains alone. Quote:
I should also note that I no longer run this motor, I 'budged" to a modified LS7... |
Quote:
|
Hey Berm
Maybe I missed this in the thread but are your valve springs on your AFR's the original springs that came on the heads? I was thinking the seat pressure is only like 135lbs on those springs. Larry |
The valve springs that came with my heads were replaced with the springs suggested by the guy who designed my cam. I am very anal when it comes to maint on my cars. Valve lash checking was never an issue and an easy job.
Vector I will pull the plugs and check them out. I will keep you posted. Thanks again guys. With this input I will talk with my machinist on these options. Berm |
I was thinking about the solid roller thing yesterday. Don't you have to use oil restrictors when using solid lifters to keep the properly oiled?
Larry |
restrictors are used to keep pressure on the main journals, restricting oil to the top end--lifters, rockers, springs.
r & r'ing my solid lifter engine after 40+ hrs, isky ezx lifters look good, clearance hasn't changed. no restrictors to the top end, afr205 with original springs, idle 1500rpm range, .600 lift. |
Quote:
|
First of all thanks again for all of your help and input. Long story short. Turn of events that led up to my failure. Last summer I used a FRAM oil filter.(EPIC mistake) I noticed a drop in my oil pressure of almost 20 psi. I ran it for a bit not sure what the problem was. I switched out to a NAPA gold filter and regained my oil pressure. While I was useing the Fram I think I hurt my main bearings. I have my motor out and I am replacing my main and rod bearings and a new melling high volume oil pump. My crank looks good. The guy who designed and built my cam gave me a good deal on repairing my cam and new solid roller lifters. I will run this for a while and keep a close eye on my valve lash. In a few years I will swap out my entire valvetrian for a hyd roller set up. Yes Larry I do have a restrictor in for my mains. My machinist suggested an oil developed by a racing team that is supposed to be the most slippery oil on the market. I will post the brand in the a.m. I can't remember. I also want to push the oil pressure regulator button in a pinch so I will end up with 75 psi under a load. Thanks again! Berm
|
Solid roller lifter failure
My Keith Craft 373 Yates engine runs a flat tappet camshaft with 185 seated and 450 open spring pressures, has 10.3.1 compression and made 675bhp on KC's Dyno, since then we re-dynoed here in NZ and this engine develops well over 600bhp on NZ BP98 octane fuel. The camshaft was run in using the outer springs only and I am running Delo 400 which has 0.15ppm of Zinc until it has done approx 1500 miles and will then use a good quality semi synthetic oil which has approx 0.15ppm Zinc. I have Schubeck ceramic lifters which are quite expensive and dont like excess valve clearance, we looked at the camshaft after the dyno runs and no problems!
I guess keep an eye on the valve clearance etc, this engine developed max pwr at 6800rpm and in my lightweight cobra the engine should last a while changing around 6500rpm, naturally metal parts wear out and springs loose their tension, I would think it prudent to check and possible strip the engine every 2-3 seasons pending usage. |
Berm, so who made the cam?
|
Blykins my cam was designed by Scott at http://www.camresearchcorp.com/ Scott deals with fords specifically. Berm
|
| All times are GMT -7. The time now is 10:02 PM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: