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Search found 67 matches

by bigmike
Sun Sep 20, 2020 4:41 am
Forum: Vintage/Classic/Historical Engine Tech
Topic: Cam advice for a mild 327
Replies: 6
Views: 54

Re: Cam advice for a mild 327

Of the cams mentioned I would go with the Isky 262/270 (208/216, .435”/. 445”, 112 LSA, 42* overlap). I'am just not a fan of the 114 LC on any SBC myself. I would also use some new freash valve springs such as the isky recommended for that cam 205-D. Also use some cam saver type lifters.
by bigmike
Thu Sep 17, 2020 1:08 am
Forum: Engine Tech
Topic: Rocker studs BBC
Replies: 7
Views: 326

Re: Rocker studs BBC

ARP is the best.

Many of the china made rocker studs have a fair amount of runout in them. They will drive you crazy when trying to set up the valve train correctly.
by bigmike
Mon Sep 14, 2020 11:58 pm
Forum: Engine Tech
Topic: Cam intake lobe vs exhaust lobe
Replies: 11
Views: 1490

Re: Cam intake lobe vs exhaust lobe

difference between the profile of a camshaft intake lobe and an exhaust lobe of same lift and duration? And, why there is a difference? I have not seen this done but my experience is limited on this but i'am long time rider and tinker. Do you have an example? Considering the RPMs some of these bike...
by bigmike
Wed Aug 19, 2020 10:13 pm
Forum: Engine Tech
Topic: Air FLow Research Aluminum Gen 1 SBC intakes
Replies: 2
Views: 357

Air FLow Research Aluminum Gen 1 SBC intakes

Curious is anyone used or tested any of 3 newest Aluminum Air FLow Research Gen 1 SBC intakes? 4810PM Single plane Operating Range 3000-7500 RPM CNC port matched to SBC 195cc street cylinder heads 4150 carburetor flange Cast in nitrous bosses Carburetor pad height 4.580" overall Dual distributor cla...
by bigmike
Mon Aug 17, 2020 5:34 pm
Forum: Engine Tech
Topic: LS cam/lifter failure
Replies: 10
Views: 487

Re: LS cam/lifter failure

Lifters were GM ls7 New with this cam, and valve lifter guides? I assume you are meaning valve guides?
No.. valve lifter guides or AKA valve lifter trays.

You might check out these two youtube videos on LS.

https://www.youtube.com/watch?v=8CzhCryAjLM

https://www.youtube.com/watch?v=cIq2xxu79NA
by bigmike
Mon Aug 17, 2020 12:54 am
Forum: Engine Tech
Topic: LS cam/lifter failure
Replies: 10
Views: 487

Re: LS cam/lifter failure

Were the valve lifter guides OEM GM or aftermarket? Were the lifters OEM GM LS7 or aftermarket?
I stopped buying any cams that are made by comp years ago after several failures.
Me to. Same with with their lifters.
by bigmike
Thu Jul 30, 2020 4:57 am
Forum: Engine Tech
Topic: Mallory Series 25 Dual Point Distributor Questions
Replies: 4
Views: 355

Re: Mallory Series 25 Dual Point Distributor Questions

The quality of those old mallory distributors was very good I think I still have a couple around. Finding good quality points these days not so easy.
by bigmike
Thu Jul 30, 2020 4:07 am
Forum: Engine Tech
Topic: Was this cylinder scoring caused by previous builder not using torque plate?
Replies: 20
Views: 1046

Re: Was this cylinder scoring caused by previous builder not using torque plate?

That does not look like a torque plate issue to me. Something else is going on. Were the pistons pressed pins? Could someone have pressed piston pins on and off a couple times and distorted the pistons? How much over are the bores now? It is interesting to note that coolant flow is not the best in t...
by bigmike
Thu Jul 16, 2020 7:19 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: A modern -097 Duntov cam.
Replies: 23
Views: 1025

Re: A modern -097 Duntov cam.

A few cam companys make a close copys of the 097. A buddy has a nice 56 chevy, he got tired of the 30 30 cam in a 283 + 060 he rebuilt with 1.94 heads. He poped in the Howards American Muscle Mechanical Flat Tappet Camshaft copy of the 097 with the howards DL lifters. He really like the lower RPM pu...
by bigmike
Mon Jul 13, 2020 12:19 am
Forum: Engine Tech
Topic: Blocking exhaust crossover on cast-iron heads
Replies: 33
Views: 1157

Re: Blocking exhaust crossover on cast-iron heads

BigBro74 wrote: Sun Jul 12, 2020 12:19 am Fel pro 1204 gasket has stainless plates that block this - they work great—no holes- already installed in The gasket
I used them a couple times years ago they always seem to burn holes in them after a while on street/strip engines for me. Anyone else see this?
by bigmike
Mon May 11, 2020 3:40 pm
Forum: Engine Tech
Topic: SBC Crankshaft main journel sizes
Replies: 13
Views: 731

Re: SBC Crankshaft main journel sizes

The dimensions called out for the main and rod journals on a say 2.45 main 350 crankshaft by chevy changed slightly over the years and it can also depend on if the 350 engine was being used in an auto or manual car or 307 . But generally for Rod journel 2.0990 - 2.1000. #1 main 2.4484 - 2.4493 #2,3,...
by bigmike
Sat May 02, 2020 10:48 pm
Forum: Engine Tech
Topic: Not A Fram filter OEM Maserati Ghibli
Replies: 1
Views: 304

Re: Not A Fram filter OEM Maserati Ghibli

Ouch! Do you think that filter was in service for 5 years? How many miles?
by bigmike
Mon Jun 03, 2019 6:28 am
Forum: Engine Tech
Topic: 380 ci sbc bending exhaust valve
Replies: 95
Views: 6420

Re: 380 ci sbc bending exhaust valve

Years ago I knew a guy the did not run Ex valve seals on 1,3,5,7 on a on a 350 dirt sprint car. Not sure how he got there but he had a theory the Ex valve stem and guides were not always getting enough oil on that side in some situations like they needed.
by bigmike
Thu Apr 11, 2019 4:16 am
Forum: Engine Tech
Topic: New crank cracked?
Replies: 26
Views: 2845

Re: New crank cracked?

That is a forging void.