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Discussion Starter · #1 · (Edited)
SR20VE
Intake cam
Low lobe: 8.4mm lift @ 220 duration
Low lobe center angle: 110deg
High lobe:10.7mm lift @ 264 duration
High lobe center angle: 104deg

Exhaust cam
Low lobe: 6.6 mm lift @ 244 duration
Low lobe center angle: 122deg
High lobe:10.34 mm lift @ 268 duration
High lobe center angle: 114 deg

SR16VE
Intake cam
Low Intake Duration: 200
Low Intake Lift: 7.1
Low Intake Center Angle: 100

Low Lobe Center Angle: 111
Low Overlap: 0

High Intake Duration: 280
High Intake Lift: 11.1
High Intake Center Angle: 100

High Lobe Center Angle: 105
High Overlap: 70

Exhaust cam
Low Exhaust Duration: 244
Low Exhaust Lift: 7.95
Low Exhaust Center Angle:122

High Exhaust Duration: 280
High Exhaust Lift: 11.1
High Exhaust Center Angle:110

SR16VE N1
Intake cam
Low Intake Duration: 220
Low Intake Lift: 8.4
Low Intake Center Angle: 110

Low Lobe Center Angle: 116
Low Overlap: 0

High Intake Duration: 288
High Intake Lift: 12.0
High Intake Center Angle: 104

Exhaust cam
Low Exhaust Duration: 244
Low Exhaust Lift: 7.95
Low Exhaust Center Angle:122

High Exhaust Duration: 288
High Exhaust Lift: 11.9
High Exhaust Center Angle:110

SR20VE (20V)
Intake cam
Low duration: 228deg
Low lift 10.10mm
Low center angle: 114deg

High duration: 278deg
High lift: 12.00 mm
High center angle: 114deg

Exhaust cam
Low duration: 244deg
Low lift: 8.30mm
Low center angle: 106deg

High duration: 280deg
High lift: 11.15mm
High center angle: 108deg

Other cam info
Timing Events:
All of the above (except lifts ofcourse) can be calculated from teh timing events.

SR16VE

Intake Low: Opens at 0deg before TDC, Closes at 20deg After BDC
Intake High: Opens at 40deg before TDC, Closes at 60deg After BDC
Exhaust Low: Opens at 64deg before BDC, Closes at 0deg After TDC
Exhaust High: Opens at 70deg before BDC, Closes at 30deg After TDC

SR16VE-N1

Intake Low: Opens at 0deg before TDC, Closes at 40deg After BDC
Intake High: Opens at 40deg before TDC, Closes at 68deg After BDC
Exhaust Low: Opens at 64deg before BDC, Closes at 0deg After TDC
Exhaust High: Opens at 74deg before BDC, Closes at 34deg After TDC


Thanks to FastNX ,92nx2k and hpro123 for the information
 

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But what does it all mean Basil!? Sorry I'm tring to find what overlap is and the searching is giving me a whole lot of info that is way over my head and explains nothing grrrrrrrr
 

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SR20VET
Intake cam
Low lobe: 8.0mm lift @ 212 duration
High lobe:11.0mm lift @ 248 duration

Exhaust cam
Low lobe: 11.3 mm lift @ 244 duration
High lobe: same

The VET has 13 degrees of overlap on the high-rpm-intake cam and single exhaust cam. There is no overlap with the SR20VET on the low-rpm-intake cam and single exhaust cam.
 

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What will work best for turbo? I have the stock sr20ve cams and they have less overlap than the 16 cams, but I get reversion when the cams switch? What cam would give the best spool characteristics and power within an 8k rev limit?

I am told to take out 10 degrees of overlap first to see how it does but I don't know much about cams and stuff. What would make a potent turbo cam as far as cam selection and cam timing?
 

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VE-T tester
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1,146 Posts
This combo will have 60* overlap vs. the having 70* overlap with both 16ve cams.
The 60* overlap is with the 16ve intake cam centerline at 100*ATDC and the 20ve exhaust cam centerline at 114*BTDC.

While I'm at it, More VE camshaft overlap:
SR20VET - 13*
SR20VE - 48*
SR20VE 20V - 57*
SR16VE - 70*
SR16VE - N1 (v1?) - 78*


edit: added vet cams
Figured this would help this thread.
 

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VE-T tester
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1,146 Posts
VET cams may look a bit low on the duration side of things, but the lift is where it's at. They seem to look perfect for turbo. I guess I will find out.
 
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