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Search found 10 matches

by CamaroMan
Sat Jan 15, 2022 10:15 am
Forum: Engine Tech
Topic: Cam overlap degrees for marine cam selection
Replies: 15
Views: 771

Re: Cam overlap degrees for marine cam selection

thanks fbird - on that cam recommendation, is there a dyno to view torque production? I had a similar cam in my 350 - GM hotcam 218/228 iirc - was incredible, smooth power and 16" idle vac- fantastic hotrod cam.. just the price is almost double the ht383- another nice thing about the HT383 cam is st...
by CamaroMan
Fri Jan 14, 2022 12:06 pm
Forum: Engine Tech
Topic: Cam overlap degrees for marine cam selection
Replies: 15
Views: 771

Re: Cam overlap degrees for marine cam selection

What are you looking to accomplish with the different cam? Without any intended arrogance/malice, why do yo think your cam selection is an improvement over the untold research and development Mercury did on that engine? Hi - well for starters the "marine" cams are not always very different. I ended...
by CamaroMan
Fri Jan 14, 2022 12:01 pm
Forum: Engine Tech
Topic: Cam overlap degrees for marine cam selection
Replies: 15
Views: 771

Re: Cam overlap degrees for marine cam selection

gr8 info - thats a fairly "large" cam ito duration but I have read some guy used the hotcam and had very good results.. ill save this on my data sheet- Merc Marine has a hyd roller from the Scorpion/Black Scorpion series ski boat engines. 350-383. vortecs, Tunnel ram efi 9.4:1 magnum manifolds. It w...
by CamaroMan
Fri Jan 14, 2022 11:53 am
Forum: Engine Tech
Topic: Budget Parkerizing flat tappet cams at shop
Replies: 35
Views: 1163

Re: Budget Parkerizing flat tappet cams at shop

Aware of the tool- been considering it. I was also under the impression that assembly lube was for motors that might sit for a few months before being fired up - and always used motor oil with additives mixed and primed... i do have the assembly stuff just never used. havent had time to pull the cam...
by CamaroMan
Thu Jan 13, 2022 11:52 am
Forum: Engine Tech
Topic: Budget Parkerizing flat tappet cams at shop
Replies: 35
Views: 1163

Re: Budget Parkerizing flat tappet cams at shop

Thanks all - ill have to pull the cam. This motor ran fine for 30 years, then it ran a bearing. I bored it 30 over, new everything- i think melling is possibly the only cam maker who supplies the 120/140/merc/gm 2.5 cams nowadays- I must admit I have checked for rotating pushrods after assembly but ...
by CamaroMan
Tue Jan 11, 2022 11:56 am
Forum: Engine Tech
Topic: Budget Parkerizing flat tappet cams at shop
Replies: 35
Views: 1163

Re: Budget Parkerizing flat tappet cams at shop

Is there ANY type of hardening for the small shop? https://blog.metlabheattreat.com/posts/heat-treating-camshafts/ Might call a few shops that do this and pick their brains- im open to even apply some old school flame hardening. I have access to a kiln too- maybe the cores are being made from less q...
by CamaroMan
Tue Jan 11, 2022 11:50 am
Forum: Engine Tech
Topic: Budget Parkerizing flat tappet cams at shop
Replies: 35
Views: 1163

Re: Budget Parkerizing flat tappet cams at shop

Your post mentions break in issues in Boats, are these open system Boats or closed? Are you referring to the cooling system? Open - but thats irrelevent.. regardless of specifying the water. This is engine related- the cooling system has zero effect on cam break in- all the closed cooling does is r...
by CamaroMan
Tue Jan 11, 2022 11:45 am
Forum: Engine Tech
Topic: Budget Parkerizing flat tappet cams at shop
Replies: 35
Views: 1163

Re: Budget Parkerizing flat tappet cams at shop

Hi all - thanks for the replies. I was wondering if the temporary oil retention of a parkerized cam lobe might assist during break in. Not sure what specs - its a 140 industrial GM motor based on the 151 nova 2 engine from the 60s. its so basic its quite incredible. New lifters and cam, lucas break ...
by CamaroMan
Mon Jan 10, 2022 2:43 pm
Forum: Engine Tech
Topic: Budget Parkerizing flat tappet cams at shop
Replies: 35
Views: 1163

Budget Parkerizing flat tappet cams at shop

Hi all- just experienced yet another cam failure on a new (stock) build.. Im now looking into experimenting with DIY parkerizing and testing a few new FT cams on some mule engines at my shop before trying it on customers boats.. Seems relatively straight forward- buy a Manganese solution for cast ir...
by CamaroMan
Sat Jul 17, 2021 12:36 pm
Forum: Engine Tech
Topic: Cam overlap degrees for marine cam selection
Replies: 15
Views: 771

Cam overlap degrees for marine cam selection

Hi all - so im trying to get some usable numbers for folks (like me) who have little idea what they are talking about when it comes to cams! Since there are some incredibly bright folks around here I thought Id post what ive researched and see if any of you can chime in and confirm/correct me and my...