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So I posted earlier about a cam swap in my 90. I have a smoking deal on a hotcam kit, cam, springs, keepers, seals, roller rockers and a timing chain for 400 bucks, never been out of the box. So anyways, my only question is, will anything have to be done to the heads ( aluminum 113’s I’m sure) for the valve springs to work? That’s it. Th aks giys for all your time and effort to help us newbies.
Make sure valve springs don't bind. I would get hardened push rods, if you go with new push rods; check rocker arm geometry before ordering to ensure correct length.
Okay, so I guess I mis-stated what I wanted to do or I am not understanding what you are trying to say ( probably the second one) but I will have the whole hot cam kit, cam, lifters, valve springs and brand new roller rockers. I want to know if I will have to machine the head any to get the valve springs to work on the stock 113 heads? They shouldn’t bind I wouldn’t think cause they are made for the cam and will have brand new roller rockers. New to this and I am just trying to understand. I thought $400 bucks was a smoking good deal for the hole kit that has never left the box it came in, but it’s not a smoking deal if I have to pay for a bunch of machine work.
There are some maybes. Hot cam was intended for GEN2 LT1 with vented Opti. Not that it won't work in a TPI. The longer cam roll pin will need changed or shortened. Tuning will be required. Spring seats will probably be ok. Techinically the heads can stay on unless there is problem with spring seat or coil bind. If you have heads reconditioned during the cam change any concerns canbe addressed.
Not hopefully to add more confusion, but I have a copy of the booklet "HOT CAM KIT INSTALL" by Photoinstructions, avaialable, at least at one time from Scoggin Dicky Parts Cener. Here, is about all it says, about the HOT cam kit: "applies to ZZ4, ZZ383, FastBurn 385, HT383 and 350 HO GM SMALL BLOCK V8 CRATE ENGINES.
I didn't do any research to find out if any of these engines use your style heads.
As to the actual installation of the springs:
"What to do:
1. Position shim under HOT valvespring
2. Install HOT valvespring/retainer
Helpful Hint:
If installing HOT Cam & 1.6:1 guided rockers on HT383 crate engine, do not use HOT Cam valvesprings. Instead, install LS6 beehive valvesprings (pn 12499224) with Pioneer retainers (pn 817-111 for 11/32 inch valvestem) and stock retainer locks to provide retainer - to - valve guide clearance."
Not hopefully to add more confusion, but I have a copy of the booklet "HOT CAM KIT INSTALL" by Photoinstructions, avaialable, at least at one time from Scoggin Dicky Parts Cener. Here, is about all it says, about the HOT cam kit: "applies to ZZ4, ZZ383, FastBurn 385, HT383 and 350 HO GM SMALL BLOCK V8 CRATE ENGINES.
I'm 99.9% sure the ZZ4 uses the same 113 heads that a '90 Vette would have, so it should be completely compatible. I would not expect to need additional machine work on the heads, specifically, valve spring seats.
If I recall correctly the limitation on the 113 head is the VALVE GUIDE will have to be machined down above a certain lift. I think 0.520" valve lift. It has nothing to do with the spring seat. You can get retainers that allow the install height of the spring to be a little taller which may be enough clearance.
As for the pin on the end of the cam, just hammer is in a little farther. You can use LT1 cams in an L98 without issue as long as the pin clears inside the timing cover.
Thanks Dave and Mtwoolford. Now the only other question I have, the vette has 135k, I know I need to replace the valve seals as it puffs a little smoke at start up and when you hammer in it good, anyways I should be able to use just good ole stock replacements correct? Also I have a ported lower intake ready to go on when I slap it back together, it already had a after market throttle body on it and I already have exhaust and will be adding headers, 24# injectors and then I will be deleting the EGR ( more on that later cause the amount they want for a delete kit is just plane dumb) and lastly a good tune will be done by a buddy who used to burn chips for these, now he’s moved on to aftermarket fuel injection and LS stuff, but can still make me one. So after all this, all I want to know, is from a dead stop, should I at least be able to light them up more than they foot and a half I can know. I figure it’s a corvette, I should be able to white smoke them for at least 10 feet or so. All my stock fox bodies could.
So after all this, all I want to know, is from a dead stop, should I at least be able to light them up more than they foot and a half I can know. I figure it’s a corvette, I should be able to white smoke them for at least 10 feet or so. All my stock fox bodies could.
Don't confuse a lack of traction for an abundance of power
Last edited by mtwoolford; Jul 24, 2019 at 09:13 PM.
If I recall correctly the limitation on the 113 head is the VALVE GUIDE will have to be machined down above a certain lift. I think 0.520" valve lift. It has nothing to do with the spring seat. You can get retainers that allow the install height of the spring to be a little taller which may be enough clearance.
As for the pin on the end of the cam, just hammer is in a little farther. You can use LT1 cams in an L98 without issue as long as the pin clears inside the timing cover.
Yep, you're right, I knew I was missing something. But even that machining can be avoided with the proper retainers, I believe.
As for OP's tiresmokin' dreams, that's going to be very dependent on your rear gears and torque converter (I'm assuming an auto here). But that should be plenty of engine.
If I recall correctly the limitation on the 113 head is the VALVE GUIDE will have to be machined down above a certain lift. I think 0.520"
That's dang close to the advertised lift limit on LT4 springs that is 0.525" which coincidentally is the lift on an LT4 Hotcam with the 1.6 to 1 rockers in the Hotcam kit. 0.005 of an inch is awfully close, and, while I'm not gonna say, don't worry about it, you're probably okay. Easy enough to verify that the valve spring retainer doesn't interfere with (hit) the valve stem oil seal with a lite weight valve checking spring.
Last edited by mtwoolford; Jul 25, 2019 at 05:49 PM.
If you contact http://elliottsportworks.com/ via phone or email. he will give you exact concrete answers as what you will require/or not. rocker arm geometry is crucial to your success
Hotcam question.
