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What do you think the diffrence in compression is on a VE from the list below.
1. ( 10.3 to 1 ) up to ( 11 to 1 )
2. ( 10.3 to 1 ) up to ( 12 to 1 )
3. ( 11 to 1 ) up to ( 12 to 1 )
The answer for #1 is about 3-4 WHP. I have a definate on that as this was about the gain Geo got. His new motor is at 195 WHP, his old motor had 20V pistons and he made 199 WHP.
Please only educated guesses and not people just throwing their 2 cents in with no facts behind it.
My answer for #2 is 11 WHP
My answer for #3 is 7 WHP
See if you guys can come up with a calculation that would figure this out.
Benifits from this mod would be moe HP and Toque and much better throttle response.
If we can come up sith some good concrete numbers the next question does it make sense to make a drop in 86mm 12 to 1 compression pistons selling for about $550-$650. for the HP gain.
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Last edited by Andreas Miko : 11-02-2006 at 12:59 PM.
hmm, ill let the experts do there math calculations, but ive seen geos 20v pistons compared them with regular VVL 2.0 Pistons and you can barely notice the difference in the dip on the piston. I mean, there is maybe a .5 milimeter or less difference in the piston, they both have the same dip just that the 20v dip is slightly higher by a hairline.
If 20v give 11.1 compression, then im going to debo those 20v pistons geo has in his garrage of engine parts.
hmm, ill let the experts do there math calculations, but ive seen geos 20v pistons compared them with regular VVL 2.0 Pistons and you can barely notice the difference in the dip on the piston. I mean, there is maybe a .5 milimeter or less difference in the piston, they both have the same dip just that the 20v dip is slightly higher by a hairline.
If 20v give 11.1 compression, then im going to debo those 20v pistons geo has in his garrage of engine parts.
Its not worth the effort for 3-4 WHP.
He is loaning me one as a sample to send out to have pistons made.
I will be sending shaved SR16VE piston and that piston as a referece.
I want to be 100% sure I get 12 to 1 compression when the pistons are made.
If someone is going to build a VE motor for say 225-230 WHP then buy a SR16VE motor.
SR16VE motor $1100
12 to 1 compression pistons $600
DE rods with ARP bolts $100
8 CW DE crank $100
Valvesprings and reainers from SR20Turbofreak $500
N1s or larger HP cams Franklin, Kelford or JWT $700
4 into 1 header by SR20Turbofreak or Kesi $1200
Bearings $120
This motor would be good for 13.0 at 105 MPH on drag radials.
You also get to sell the SR16VE cams for $400
Last edited by Andreas Miko : 11-03-2006 at 02:36 AM.
If someone is going to build a VE motor for say 225-230 WHP then buy a SR16VE motor.
SR16VE motor $1100
12 to 1 compression pistons $600
DE rods with ARP bolts $100
8 CW DE crank $100
Valvesprings and reainers from SR20Turbofreak $500
N1s or larger HP cams Franklin, Kelford or JWT $700
4 into 1 header by SR20Turbofreak or Kesi $1200
Bearings $120
This motor would be good for 13.0 at 105 MPH on drag radials.
You also get to sell the SR16VE cams for $400
ok. but what compression ratio I can get if I'll change "12 to 1 compression pistons $600" on
1-sr20ve 97-00
2-sr20ve 01
ok. but what compression ratio I can get if I'll change "12 to 1 compression pistons $600" on
1-sr20ve 97-00
2-sr20ve 01
I am not sure if this is a trick question, but I will answer it.
12 to 1 compression is 12 to 1 compression.
Both these motors have the same bore, same stroke and same cumbustion chamber cc. That being said, they will both get 12 to 1 compression with the same piston.
I am not sure if this is a trick question, but I will answer it.
12 to 1 compression is 12 to 1 compression.
Both these motors have the same bore, same stroke and same cumbustion chamber cc. That being said, they will both get 12 to 1 compression with the same piston.
You don't understand me...
another question
which combustion volume has
1-sr16ve head
2-sr20de head
3-sr20ve 97-00 head
4-sr20ve 20v head
which compression ratio can I have if I use
sr16ve head, sr20decrank+rods (86*86) and:
1-sr20de pistons
2-sr20ve 97-00 pistons
3-sr20ve 20v pistons
4-sr16ve pistons
another question
which combustion volume has
1-sr16ve head
2-sr20de head
3-sr20ve 97-00 head
4-sr20ve 20v head
which compression ratio can I have if I use
sr16ve head, sr20decrank+rods (86*86) and:
1-sr20de pistons
2-sr20ve 97-00 pistons
3-sr20ve 20v pistons
4-sr16ve pistons
You dont understand me.
All VE heads have the same cumbustion volume size 41 cc
1. 10.3 to 1 dont use these they have no valve notches
2. 10. 3 to 1
3. 11 to 1
4. 13.5 to 1
