HowlerMonkey Posted January 28, 2011 Share Posted January 28, 2011 The original poster still needs to check whether his head has hydraulic lifters or not. Quote Link to comment Share on other sites More sharing options...
Zguy91 Posted February 1, 2011 Author Share Posted February 1, 2011 Ill check tonight the car has been 200 miles away from me at my parents house. I think it is though so the cam swap on the C cam wont work for me. Ill probably just use it on a stroker build Quote Link to comment Share on other sites More sharing options...
RSready Posted February 22, 2011 Share Posted February 22, 2011 So is there a definitive answer on this? I've lined up an L28ET from an '81 and found a C cam locally. I'm just going to be running the motor fairly stock - just an intercooler and maybe 12psi. Firstly, will it work on my motor (I don't know what lifters I have) and will it be worth it? Thanks, Dave Quote Link to comment Share on other sites More sharing options...
Tony D Posted February 23, 2011 Share Posted February 23, 2011 Oh, you mean like 'which cam is BEST for an L28ET engine'? Quote Link to comment Share on other sites More sharing options...
Pyro Posted February 23, 2011 Share Posted February 23, 2011 I would worry about the cam later. much later get your engine installed and running with IC and 12 psi drive it for awhile then worry about the cam, as you have bigger fish to fry! Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted April 11, 2011 Share Posted April 11, 2011 (edited) I am installing an E31 "A" Cam, rockers, and matching external oil towers with spray bar into my L28ET/P90A solid "lifter" (rocker post) engine. The full engine rebuild will start today and proceed for the next couple of weeks. Based on the info here, I should have a nice gain in top end with some possible mid range torque gains. Will report my butt dyno results, of course. Any word from the OP and the "C" cam? Edited April 11, 2011 by cygnusx1 Quote Link to comment Share on other sites More sharing options...
s30red240z Posted April 11, 2011 Share Posted April 11, 2011 Oh, you mean like 'which cam is BEST for an L28ET engine'? I would like to know this, i've been thinking about a L28ET for my 240z Quote Link to comment Share on other sites More sharing options...
Zguy91 Posted April 11, 2011 Author Share Posted April 11, 2011 I have the P90A head so without modification I cant use the cam. Let me know how converting your head to be able to use the cam works. I might want to do the same Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted April 11, 2011 Share Posted April 11, 2011 (edited) I have the P90A head so without modification I cant use the cam. Let me know how converting your head to be able to use the cam works. I might want to do the same Converting the head to solid is fairly easy with thread adapters for the solid rocker posts. Then just install the new cam, and check the wipe pattern. My P90A head happens to be factory solid. I didn't convert this one. I always reference this chart for cam info. The early A is not drilled for oil, I am not sure about the later A cams. http://www.atlanticz.ca/zclub/techtips/cam/index.htm Edited April 11, 2011 by cygnusx1 Quote Link to comment Share on other sites More sharing options...
Tony D Posted April 12, 2011 Share Posted April 12, 2011 Yep, I have THREE P90A's in my shed... NOT ONE is "Hydraulic"--you can not go by casting number, you have to look. The fourth P90A I have is in a relatively unmolested 83 ZXT 2+2, and it's got the hydraulics in it. Externally it's identical to two of the ones I have in storage, and the other one simply doesn't have the oil cooler on it. Quote Link to comment Share on other sites More sharing options...
Zguy91 Posted April 13, 2011 Author Share Posted April 13, 2011 Mines an 83 so its hydraulic Quote Link to comment Share on other sites More sharing options...
Daphur280 Posted April 14, 2011 Share Posted April 14, 2011 Converting the head to solid is fairly easy with thread adapters for the solid rocker posts. Then just install the new cam, and check the wipe pattern. My P90A head happens to be factory solid. I didn't convert this one. I always reference this chart for cam info. The early A is not drilled for oil, I am not sure about the later A cams. http://www.atlanticz.ca/zclub/techtips/cam/index.htm Is there an advantage to this rather than going with a non-hydraulic lifter head? This tompic has peaked my interest, but I have a p90a Hydraulic head. Quote Link to comment Share on other sites More sharing options...
Tony D Posted April 14, 2011 Share Posted April 14, 2011 Mines an 83 so its hydraulic OMFG... TWO of the THREE I got in the shed came from 83's. The year, the casting... MEANS NOTHING--you can say you have Hydraulic when you have LOOKED and CONFIRMED it. How hard is this? Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted April 14, 2011 Share Posted April 14, 2011 (edited) Converting a P90A-H to a P90A-S has no disadvantages over a P90, that I can think of. Edited April 14, 2011 by cygnusx1 Quote Link to comment Share on other sites More sharing options...
Daphur280 Posted May 8, 2011 Share Posted May 8, 2011 Converting a P90A-H to a P90A-S has no disadvantages over a P90, that I can think of. or advantages? perhaps cost? Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted May 8, 2011 Share Posted May 8, 2011 or advantages? perhaps cost? Cam availability. Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted May 8, 2011 Share Posted May 8, 2011 (edited) Let me translate my own post. A P90A/H with a solid kit installed, including a correct cam, is equivalent (performance-wise) to a P90 that came with solid posts. I don't know if they varied the coolant chamber design between the two heads. Edited May 8, 2011 by cygnusx1 Quote Link to comment Share on other sites More sharing options...
dpuma8 Posted May 23, 2011 Share Posted May 23, 2011 I have a F cam from a head I bought and was wondering if this would be an upgrade in my L28ET. Is there a site that lists out which cams can do what L28ET? Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted November 29, 2011 Share Posted November 29, 2011 I am bumping this thread as it is relevant to what I intend to do to get my S30 turbo back on the track this spring with Megasquirt. Some of you know I wiped a lobe on my Schneider cam earlier this year, so I want to swap another cam in to get the motor working without a cam break-in to worry about while tuning the MS. I pulled an E31 head from a scrapyard engine, and the cam looks good. There is some bearing surface wear, but I'm hoping that doesn't create an immediate issue -- the lobes on the factory cam all look good. So I am going to swap the towers, spray bar, rockers and the "A" cam to my P90. I am installing an E31 "A" Cam, rockers, and matching external oil towers with spray bar into my L28ET/P90A solid "lifter" (rocker post) engine. The full engine rebuild will start today and proceed for the next couple of weeks. Based on the info here, I should have a nice gain in top end with some possible mid range torque gains. Will report my butt dyno results, of course. Any word from the OP and the "C" cam? I've done quite a bit of searching and reading up on these cam swaps, but I still have a couple questions, and of course any comments on this swap are welcome. The lash pads are of course worn, and I have kept them with the associated (and numbered) rocker arm. Assuming the wipe pattern is centered on the rocker arm, is it ok to reuse the lash pad or do I need a new one? If I can re-use the lash pad, does it matter if it is installed 180 degrees around (I didn't document orientation)? I suppose I can mark the lash pad surface like the rocker surface and ensure the pattern stays within the wear area... Tell me if this is false economy. I am just trying to get a valve train up and running with a new fuel computer, and then I intend to re-do the valve train properly, perhaps with another set of externally oiled cam towers once I have a reasonable tune. I don't want to worry about a cam break-in without a reliable tune. And I am also interested in feedback from the OP on any aspect of this swap, or anyone else regarding used cam swaps and/or results of the 240 cam in a turbo engine. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted December 5, 2011 Share Posted December 5, 2011 Bump for information on the lash pads. Obviously the slotted part goes up, but when swapping over I did not preserve orientation. Is 180 out ok, and if not, can the appropriate orientation be achieved, maybe with a wipe pattern? Quote Link to comment Share on other sites More sharing options...
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