Isky high rev

[Warp Speed]

I may have come off in my original post as sounding like because isky is an older cam company that i was knoc king them as only having older designs i have no doubt they have just as smart of people there as any of the other large cam companies. Both the crower and isky are pro 55 type cores. Im after high rpm power but duability more important to me then best power. Was thinking something less quick ramp rate would be better for that.

Best thing I would suggest is call Isky directly and have a chat with Nolan then have a chat with Richard but you have to call after 3pm PST as he is the guy that will help you the most with a custom cam. Nolan is great as well but Richard has many more years and anything like that gets run by him anyway.

We were using Isky cams back in the winston west days when they allowed rollers when Reed cams was a series sponsor and we whipped their ass with a good ol isky FT solid.
Most stable valve train at 10,000 camshaft RPM I have seen on their spin tron when we were having spring issues testing profiles back in the 80's but they have come along way with lobe development since then.
We use them in limited sprint car stuff 360/410 where FT cams are the rule and they get to over 8000 when its time to win.

10k cam rpm, in the 80s too.......impressive! Lol

[Little Mouse]

Pdq67 i would imagine if ed is still alive at his age probably having others do most everything. I have read interviews in the rag-azines nolan talking on cams. I do kind of like using an isky have only used crane and crower and in my teens chevy 140 cam.

[CamKing]

Nope Camking, the card that came with the Isky B-777 cam stated 268* @ 0.020" lifter rise.

Well your cam card is wrong. I have 3 Isky Catalogs here, and they all agree with Isky's website. It's 280 @.020".

[Geoff2]

Camking,
No my cam card is not wrong. I also have 3 Isky catalogs [ maybe 4 if I go searching..... ], none of them specify 280* at 0.020". The 280* is stated as ' advertised duration' , no mention of what tappet rise that is measured at. The lash is mentioned, 0.018" hot, which would be 0.012" lifter rise. Maybe that is where the 280* is measured.

[CamKing]

Camking,
No my cam card is not wrong. I also have 3 Isky catalogs [ maybe 4 if I go searching..... ], none of them specify 280* at 0.020". The 280* is stated as ' advertised duration' , no mention of what tappet rise that is measured at. The lash is mentioned, 0.018" hot, which would be 0.012" lifter rise. Maybe that is where the 280* is measured.

According to Isky's catalog, the Adv duration is measured somewhere between .017" and .023". Even at the lowest point of .017", it would be much longer then 268@.020".
Cam Dr one of them.

[Geoff2]

Camking,

I used to degree ALL the cams I was fitting at that time. The cam card stated the checking lift was 0.020" lifter rise & the duration at that rise was 268*. End of story.

From my original measurements of 4 lobes, this is the duration I measured with a degree wheel @ 0.020 lifter rise: 270, 268.5, 269.5, 268

At 0.008" rise: 291,289, 290.5,288.5
At 0.012" rise: 282, 281, 282, 280,
At 0.016" rise: 276, 274, 275.5, 273
At 0.018" rise: 273, 271, 272, 271
At 0.022" rise: 267.5, 265.5, 266.5, 265
At 0.024" rise: 265, 263.5, 264, 262.5.

It seems that the adv duration is measured as tappet rise from the lash figure, which is 0.018" for this cam. That is 0.012" tappet rise with 1.5 rockers & it corresponds with the 280~* numbers I got at 0.012".

I also had a number of custom ground SFT cams done by Isky between 2005- 2008. All the adv duration #s checked out in the 0.020-0.022" tappet rise range.

[hysteric]

How did the B-777 perform Geoff2? What cubes were you running it in?

I found a Z-35 really cheap @ $190 I couldn't pass it up. But in retrospect the B-777 is better suited to my current combo.

Hysteric

[pdq67]

Pdq67 i would imagine if ed is still alive at his age probably having others do most everything. I have read interviews in the rag-azines nolan talking on cams. I do kind of like using an isky have only used crane and crower and in my teens chevy 140 cam.

I think Ed just had another birthday and is doing fine for his age! 97...

https://www.speed-talk.com/forum/viewtopic.ph ... ky#p751082

pdq67

[Little Mouse]

Ya i saw something about his 95th birthday in 2016.

[Geoff2]

Hysteric,
I ran it a 440 & a 383 stroker. It ran great for a mid level, streetable cam. I was so impressed with it that I got a local cam grinder to make a copy. He used the grind in other brands & got good feedback from owners.

[hysteric]

Thanks Geoff. Might have to get one if the Z-35 is too big for what i want.

[pdq67]

The old Isky Z-30 flat tappet solid lifter cam runs great in a hopped up 11 to 1 CR'd 327"/336" or so SBC even though it is old and has low lift.

Use Isky's springs and hit 8,000 easy if the rest of the combination is on.

pdq67

[engineguyBill]

Ed doesn't spend much time around the shop anymore, as he has turned the reins over to Richard and Ron. Ed comes into the shop sometimes, as he still maintains an office there (which is quite a museum in itself) then goes to coffee or lunch with some of his old cronies. Problem is, at his age he has outlived most of his cronies though. If anyone needs information about any Isky cam, past or present, just call the main number in Gardena 310.217.9232. Anyone who answers the phone will be able (and willing) to help.

[engineguyBill]

In response to PDQ's post on the previous page . . . . . .

Ed doesn't spend much time around the shop anymore, as he has turned the reins over to Richard and Ron. Ed comes into the shop sometimes, as he still maintains an office there (which is quite a museum in itself) then goes to coffee or lunch with some of his old cronies. Problem is, at his age he has outlived most of his cronies though. If anyone needs information about any Isky cam, past or present, just call the main number in Gardena 310.217.9232. Anyone who answers the phone will be able (and willing) to help.

[Little Mouse]

I had the two factory blocks checked out for cracks and the mains are in tollerance. But i would still like to have the mains line honed and use main studs with nodular caps they have. By the time i have all the machining done would be a ways torwards buying an shp block that is worlds better then anything the factory done. Just my opinion but for very long term use i think a factory block should be limited to 450 hp. I want to make closer to 550 so im going to buy an shp block for plenty of insurance. To me the block is like the foundation of a house no sense building a nice million dollar house on a bad foundation. In the early 70s i worked in a machine shop they had engines delivered from the junk yard. The forman liked me i could buy any block or crank i wanted for $5.00 each. The 331 i mentioned had a large journal forged 327 crank. 12.5 trw pistons and new turbo 292 heads. After i got tired of it i built a 396 bbc and gave the guy i shared a shop with the 327 crank. He put it in a 400 block i think he used trw spacer bearings to do it then put it in his 69 camaro. I had the 66 vette at that time we kept both cars in the shop.