Cam advise
Thread Starter
Racer
Joined: Oct 2012
Posts: 298
Likes: 0
Cam advise
Hi all, I'm looking for some help picking a new camshaft for my 85. I'll be using Scorpion 190 heads , ported SLP runners with ported stock base and plenum and long tube headers. Im looking for more power to Autox. Thanks
Team Owner
Joined: Jul 2004
Posts: 28,422
Likes: 3,275
From: Hartford WI
Have you thought of asking the guy who will tune the car for you? I'm not sure you will see radically more going that route. I would do headers, intake and tune first. At that point, you can hold off or add a cam that the tuner recommends.
Safety Car
Joined: Nov 2009
Posts: 3,973
Likes: 341
From: Adelaide South Australia
Duration and LSA are the issues with tuning - are you using the 870 computer ?
If you keep the duration short (219 - 229) and use a 112 LSA cam the tuner shouldnt have too many issues.
As far as lift - see what the recommended max lift is for your heads/valve spring combo and go just under.
If you keep the duration short (219 - 229) and use a 112 LSA cam the tuner shouldnt have too many issues.
As far as lift - see what the recommended max lift is for your heads/valve spring combo and go just under.
Thread Starter
Racer
Joined: Oct 2012
Posts: 298
Likes: 0
Duration and LSA are the issues with tuning - are you using the 870 computer ?
If you keep the duration short (219 - 229) and use a 112 LSA cam the tuner shouldnt have too many issues.
As far as lift - see what the recommended max lift is for your heads/valve spring combo and go just under.
If you keep the duration short (219 - 229) and use a 112 LSA cam the tuner shouldnt have too many issues.
As far as lift - see what the recommended max lift is for your heads/valve spring combo and go just under.
Safety Car
Joined: Nov 2009
Posts: 3,973
Likes: 341
From: Adelaide South Australia
it actually has 560/550 lift with a 113 lsa.
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Thread Starter
Racer
Joined: Oct 2012
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Team Owner
Joined: Sep 2001
Posts: 62,139
Likes: 1,728
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
85 & 86 have a 2026rpm TC from the factory, which is all you will need.
With the TPI staying on it, I'd pick a camshaft with a duration range of 210-215/215-220 on intake/exhaust at 050", then whatever lift with 1.6RR, probably around .550 ish.
With the TPI staying on it, I'd pick a camshaft with a duration range of 210-215/215-220 on intake/exhaust at 050", then whatever lift with 1.6RR, probably around .550 ish.
Le Mans Master
Joined: May 2006
Posts: 7,708
Likes: 266
From: indy indiana
the 86 has the best converter. You cant buy them new from GM anymore. However, there is a V-6 S-10 pickum up truck that has that same 86 converter that you can buy, or it might be even a little better than the vette verter. I will find where I srored my info and post it here later
Thread Starter
Racer
Joined: Oct 2012
Posts: 298
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Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Lingenfelter made a "214" flat tappet that should work without him milling his guides down.
Real smilar to the generic/Elgin 214/224 cam youve seen forever. No need to machine the guides but always double check. Strong torque
Real smilar to the generic/Elgin 214/224 cam youve seen forever. No need to machine the guides but always double check. Strong torque
Last edited by cv67; Jul 31, 2018 at 07:09 AM.