I dont have the best knowledge with solid lifters, so does anyone about, or have some good solids to try the test below.
As some may know, since i rebuilt my 351 a few months ago, i have had low oilpressure problems. I am starting by checking to see if this cam survived run in and if the lifters maybe a cause to the low pressure. If i put the old solid lifters from my previous build to my mouth, and try and blow through them, i can't get air or oil to flow. When i try with the current lifters with the low oil pressure, i can blow the oil out with ease, and then air flows with no resistance. Is there meant to be some resistance through solid lifters?
I thought there was a metring plate in the lifter which restricts it somewhat.
My hot idle PSI dropped about 35PSI after installing the solid lifters. From what i've heard large pressure drops are to be expected... but aren't an issue.
My hot idle PSI dropped about 35PSI after installing the solid lifters. From what i've heard large pressure drops are to be expected... but aren't an issue.
10-15 pounds hot at idle, and 40-45 pounds at full noise. I recon it should be a lot higher, especially at high revs. 40 pounds at 6800 rpm scares me a bit.
10-15 pounds hot at idle, and 40-45 pounds at full noise. I recon it should be a lot higher, especially at high revs. 40 pounds at 6800 rpm scares me a bit.
Iv'e got a new standard volume and std pressure mellings pump. Same type as all the other builds iv'e had, but this is the first solid lifter combo. When i had hyd lifters i had 50-55 at idle hot and 75 while revving.
I,ve an old set and mine are exactly the same.IE I can blow into them and air comes out easily.is this a totally new short block xd clevo or not.? Didn,t your last build shit itself because of the cam and lifters not breaking in properly?If so what were the clearances of mains and big ends.10 psi at idle seems awfully low and so does 45 hot.
I,ve an old set and mine are exactly the same.IE I can blow into them and air comes out easily.is this a totally new short block xd clevo or not.? Didn,t your last build shit itself because of the cam and lifters not breaking in properly?If so what were the clearances of mains and big ends.10 psi at idle seems awfully low and so does 45 hot.
Yeah, i got another black block and started again with a torque plate bore and hone to match the TRW pistons and studs top and bottom. Crank grind 30 thou under, rings,brgs, oilpump/pickup and cam and lifters. I had the machine shop check before i got back, but i checked also. When assembling and only checking with plasti-gauge it looked fine with 2.5 thou clearance on the mains and a tad over 2 thou on the conrods.
I checked the lifters today, and cam seemed to run in fine.(all with same method as the failed cam)
I can't help you because these are my first solids after lunching my hydraulic cam. I don't have a separate oil presure gauge, only the factory one. I am running std volume new oil pump.
Could ask my engine builder friend and tell you what my std gauge reads.
Solid lifters do not have the restrcition to flow like hyds. Hyds have restriction so they pump up to set valve lash. I found adjusting the hot valve lash properly @ middle of base circle certainally improved oil pressure.
Solid lifters do not have the restrcition to flow like hyds. Hyds have restriction so they pump up to set valve lash. I found adjusting the hot valve lash properly @ middle of base circle certainally improved oil pressure.
I have pulled appart hydraulic lifters before, so i can see the set up which restricts it. Its a wonder solids don't use something similar to restrict the oil and keep the oilpressure higher.
No restrictor kit fitted. That still shouldnt cause low oil pressure. I know many guys running solids in their clevelands with no oil restrictors, and they have no problems. Since i didn't really plan to rev over 7000 rpm, i never fitted the restrictors to the cam bearings or the passenger side lifter bank.
Sorry, but I certainly did.
The correct way as finding base circle of lobes?
Wouldnt hurt to reduce lash up to .004".
Try heavy oil too say 15w50 or so.
Or at may be pump or clearances. At normal eng temp they say 30psi @2500 rpm, do you have that?
Sorry, but I certainly did.
The correct way as finding base circle of lobes?
Wouldnt hurt to reduce lash up to .004".
Try heavy oil too say 15w50 or so.
Or at may be pump or clearances. At normal eng temp they say 30psi @2500 rpm, do you have that?
Yes, correct as in finding real base circle. I have set where i think right, and rechecked clearances in many small increments before and after and noted where exactly the true base, or lowest point is. Happens to be for inlet when the exhaust is at 1/3 lift on its way open, and for the exhaust is when the inlet valve is fully open and about 1/4 of the way shut again. I have to do all again on Monday as i'm fitting the inner springs finally. Yeah yeah, should of done that when i did the lash this week :zzz:
I get 40 pounds pretty quick after idle when hot, but thats it, and at high revs it drops away lass than 40.
Yes, correct as in finding real base circle. I have set where i think right, and rechecked clearances in many small increments before and after and noted where exactly the true base, or lowest point is. Happens to be for inlet when the exhaust is at 1/3 lift on its way open, and for the exhaust is when the inlet valve is fully open and about 1/4 of the way shut again. I have to do all again on Monday as i'm fitting the inner springs finally. Yeah yeah, should of done that when i did the lash this week :zzz:
I get 40 pounds pretty quick after idle when hot, but thats it, and at high revs it drops away lass than 40.
Less than 40 at high rpm is a worry, I didn't realise you were that low. I get 45-50psi @ 3000 RPM cruising. I don't know what its like above that because of the sissy rev limit I imposed on the engine until it gets rebuilt.... 40 or below at 4000 is something that would worry me. How is your oiling system setup?
Oiling system is stock, with no oil restrictors. New, mellings standard volume oilpump and 7 litre sump. To get the oil back in the sump quicker, i matched the return galleries in the heads, gasket and block, and also the alloy heads come with a bigger oil return galleries than standard, so matches good.
I argee with decision to stick with standard oil pump, I also running mellings standard replacement. Mine does get down to 25-30 @ hot idle but goes up with revs to 50 or so. High volume pumps place to much extra load on cam, timing set and sucks HP. Mate of mine actually spun his dizzy in the block due to HV pump.
I reckon your oil pressure problem will be OK when you fit inner valve springs as oil pressure will be lost as soon as control of valve springs are lost due to lack of tension, your lifter would be ski jumping off the cam lobes and not closing quick enough causing huge valve train lash!!
I agree with the inner springs, but if you've gone to the trouble of fitting a 7 litre sump then you might as well fit a high volume sump to actually use that extra oil.
I know and have been involved with the running in of these engines. 2 I know definately have restrictor kits. 15-30psi @ idle and 60-70psi @ 6000-7000rpm. The other one I am sure it has restrictors installed but I aren't definate. It's got 30-40psi @ idle and 60-80psi from 3500rpm upward! It's the highest oil pressure I've seen on a solid cammed engine and also at the lowest rpm.
I know and have been involved with the running in of these engines. 2 I know definately have restrictor kits. 15-30psi @ idle and 60-70psi @ 6000-7000rpm. The other one I am sure it has restrictors installed but I aren't definate. It's got 30-40psi @ idle and 60-80psi from 3500rpm upward! It's the highest oil pressure I've seen on a solid cammed engine and also at the lowest rpm.
Hey guys
Ive got a roller cam setup with roller lifters, we had the restricter kit just didnt fit them and my oil pressure is always above 60psi normally on between 65-70 at idle and under revs it hardly moves maybe 2-5 Psi each way is it suppose to be this high all the time and is there if any damage this could be causing. The main reason we didnt fit the restrictor kit cause we knew the engine would be eventually coming out before 5000kms and we were thinking of bronzing the lifter bores then with the bigger cam and compression. Also anyone know wether methanol is legal for road use tossing up the idea of going 13.1 comp or slightly higher and running methanol???
Methanol: Not personally sure it its legal, but it sure would smell nice!
Media Release - Nat 2000/83
Tax Commissioner, Michael Carmody, said today that "Methanol blending is legal under current Excise legislation" there is no excise evasion involved in the blending of ethanol and methanol with fuel.
The blending of excise-free ethanol and methanol with petrol was authorised in 1994 by the then Government as part of its alternative fuels strategy.
______________________
Now I know that the only reason you're doing this is to reduce bad green house emissions, so what could they have against V8 users doing there part in working towards a cleaner future
Its purely for environmental reasons we all need to do our bit for the environment in which we live in the extra 50 or more Horsepower depending on what compression ratio I decide to run has completely nothing to do with my decision . been sussing out cams deciding wether to go Isky or Competition cams and wether to go over 700though lift or stay under that, definately going to be a 290 - 300 duration cam, 550-600RWHP and some high 9 sec time slips shouldnt be out of the question
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Ford Forums
1.4M posts
115.4K members
Since 1999
Ford Forum is a community to discuss all things Ford. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more!