best LT1/LT4 heads
As for head work, if I for some reason could not use Lloyd the next in line would be Eric Weingartner or Chad Spiers.
My Lloyd Elliot hand ported offshore castings flow more than the AFR 190cc CNC Vortecs do and make over 500 hp despite a small 218/228 @ 0.050 cam. I have yet to see a 500 hp engine using those AFRs. There are alot of LT1 combinations with Lloyds heads and cams making over 500 hp that Karl Ellwein has built and has full writeups on as well. Karl somehow makes them work great, so maybe those other combinations that you claim performed poorly or blew up had other issues. Keep in mind I have been doing this since 2000 myself.
I have an XFI292 cam right now. I hope I'm one of the lucky ones and it lasts!
Is Chad Spiers better, worse, or about the same as LE's work?
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Congrats. By your dyno standards you are making 80 more HP with that smog legal cam than I made with my LPE 211/219 with LT4 cast ported heads. Not only that, you're making just a few hp shy as what I was making with my mild SR 396. Please take it to the track. With 500hp (I'm assuming motor) you should be low 11's or high 10's in good air... with a smog legal cam, and I am assuming N/A. With the mild idle that thing has it's a real sleeper!
Is Chad Spiers better, worse, or about the same as LE's work?
My cam could probably pass smog, but it has 61.5* of overlap at 0.006 due to its 108 LSA. It is not a Hotcam rather a custom grind. It is 271/284 @ 0.006, 218/228 @ 0.050, and with a 1.7 rocker it has 0.578" lift and is degreed in on a 106 ICL. Definitely has a bit of idle chop to it at 750 rpm as well. The lobe profile is somewhat slow and old because I wanted something easy on the the valvetrain, that might last 100K and could for minutes at a time at higher rpm when towing.
Chad Spiers has some excellent CNC work but you are going to pay for it. I have seen alot of his epoxy work as well for all out class racing. He can make the a 23* head flow like crazy but as I said, better have deep pockets.
Last edited by Fast355; Feb 22, 2024 at 03:14 PM.
Have run Comp 875R lifters without any issues
Have had Comp 850's in current 383 for at least 45k mi as well as a XFI cam
My heads were ported by a shop in SoCal. no longer in bizz, with Ferra 2.02/1.60 valves and have performed well. My build is CA smog restricted so cam is small (466)
Only part fail was Comp 918 springs but I dodged the piston to valve boom as a result.
Only contact I have had with LE is about springs to replace the 918's. He sold me the Lunati set and was very responsive to any email ? I had. He even sent me .500 valve stem seals as my heads were cut down originally for Comp 987 springs.
As far as what heads/cam packages for LT1 that performed better, AI appeared to have the most chatter about their results, but they were not OMG more than other non AI combos.
IMHO a motor making about 400hp and more TQ to the wheels and does not burn a drop of oil and has been down the track 100's of times and passes CA smog, to me, is a decent build. Mine just happens to have Comp lifters and cam. YMMV.
Congrats. By your dyno standards you are making 80 more HP with that smog legal cam than I made with my LPE 211/219 with LT4 cast ported heads. Not only that, you're making just a few hp shy as what I was making with my mild SR 396. Please take it to the track. With 500hp (I'm assuming motor) you should be low 11's or high 10's in good air... with a smog legal cam, and I am assuming N/A. With the mild idle that thing has it's a real sleeper!
Is Chad Spiers better, worse, or about the same as LE's work?
If you're happy, I'm happy!
First time I ever heard anything bad about LE....of course if it's in an internet forum post it must be true.....right?










