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| Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here. |
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#1
10-09-2017, 11:01 AM
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Turbo cam
Pulled my motor for some freshening and thinking roller. 2802 in there now and very underwhelming in my opinion. How do you think the old faithful would fair under low boost (10-15psi) but maybe cut on a 114-115 instead of 112?
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71 grand prix SJ 4280# 462 new for 2008 - 8.7:1 , 98cc 6Xs 246/209, 342 12bolt , BW S475 turbo JGS 50mm WG 56mm BOV. 600hp the easy way! |
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#2
10-09-2017, 11:23 AM
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Or stump puller which is already on a 114. I like the high lift but moderate duration.
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71 grand prix SJ 4280# 462 new for 2008 - 8.7:1 , 98cc 6Xs 246/209, 342 12bolt , BW S475 turbo JGS 50mm WG 56mm BOV. 600hp the easy way! |
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#3
10-09-2017, 03:35 PM
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Moderate Overlap (gets better (less) with wider lobe separation) and higher lift seem to work well. The turbo always has pressure in front of the Turbo exhaust inlet so big overlap/big exhaust durations tend to hurt things vs help things.
Some even have larger intake duration vs exhaust duration on higher boost applications. That being said, people have gone fast with almost factory design camshafts. Talk to the guy with the Triumph with the bog single turbo. He might have some wisdom on some earlier street turbo builds. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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