Thread: Plans for High CR VE build

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2009-01-09 21:55:50

#61

nismos13silvia Online/offline status of nismos13silvia is unknown

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Getting WAY off the subject now

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2009-01-09 22:01:12

#62

snickers

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2009-01-09 23:18:06

#63

KillerKrossover Online/offline status of KillerKrossover is unknown

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Originally Posted by nismos13silvia

Good stuff so far.

NO BORE AT ALL! I don't trust anyone around here. So, 87mm pistons in a UNBORED block is fine? Just honing will do the trick? If so, I go for the 87mm. Should still be able to use the OEM VE metal head gasket.

Still undecided about 4cw NO girdle vs. 8cw w/girdle. Not going to rev that high. Just to the N1 cams limits. My biggest thing is, RELIABILITY. Just want to do it right the 1st time around.

Also, VE rods or DE rods?

I know the bottom end is NOT pointless! If you have read/kept up with what some of the Puertican(you know who you are) guys are doing. Making around 18hp and 15ft lbs at the wheels, just by swapping out higher compression pistons alone. They got dyno #'s.

Sounds like a plan.

I was going to use the same example.

Impressive gain for compression increase.

Good luck with what ever route you choose.

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2009-01-11 08:00:38

#64

ca18 bluebird Online/offline status of ca18 bluebird is unknown

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Originally Posted by snickers

As i have said before not all VE heads are equal. the earlier castings are better than the later ones. I have flowed several stock VE heads and they range from 238cfm @ .500" lift to 277 @ .500" lift. BONE STOCK. This all depends on the port transition from before the divider to the valve seat and into the combustion chamber.

The factory intake manifold by itself may flow more than the cylinder head ( which it does) but because the port entry from the plenum is smaller than the outlet at the cylinder head mating surface, there is a reverse taper which means the air slows down and the pressure in the intake runners becomes less than atmospheric. When you bolt a factory intake manifold to a GOOD ve cylinder head and flow it, it drops by about 45cfm. A head that flows 277 @ .500" without the intake flows 233 @ .500" with the intake manifold and T/B with velocity stack. This is not theory, this is a fact.

The 20v intake ports do have a higher roof and they are narrower slightly than a std VE head. the 20v head does have slightly higher flow through about .400" lift then the std head takes over. the 20v intake with the longer divider does help velocity through the midrange lift points which helps power at those flow/power levels.

To get the correct resonant length from a stock sr20ve intake manifold for 8000rpm you need to add 30mm to the runner length.

which early castings are you talking about? like what years where the good years, or are you just referring to the 16ve heads

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2009-01-11 08:15:21

#65

snickers

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2009-01-11 19:06:18

#66

ca18 bluebird Online/offline status of ca18 bluebird is unknown

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^^^ thanks for that info. I think i might look through my shed for my oil pan to see if it had a windage tray...i hope not now lol. From memory i dont remember seeing one, i think i poped the lower oil pan and saw my counter weights, but it has been that long since i tore it down its hard to remember

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2009-01-11 20:33:51

#67

snickers

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2009-01-11 20:48:51

#68

Andreas Miko Online/offline status of Andreas Miko is unknown

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I have seen 3 versions but they are diffrent to you snickers.

I have seen

SR16VE oil pan
SR20VE oil pan
SR20VE 20V oil pan.

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Good Thoughts Bring Good Vibes Which Bring Good Reasoning

I Am A JWT Dealer And VRS Dealer.

If you need any help 305-282-3643

I sell SR20VE, SR20DE and SR20DET motors

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2009-01-11 21:10:18

#69

TheRealNighthog Online/offline status of TheRealNighthog is unknown

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Originally Posted by snickers

There are 3 varriants of sr20ve oil pans that I have seen. All three lower pans have different shapes. The earliest one that does not have the windage tray has the "wierd" shape to it and I believe the only one you can get a cork gasket for, another is almost the same as a DE one, and the other is almost square.

Thats the one that I have. I am using a cork gasket for it for a RR DE.

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Originally Posted by Shawn
Dammit. I thought that birthday equation worked in my favor.

I musta forgot.....early onset of senility.....too many drugs and concussions........

Give us another twenty years and we'll be racing at Conventions. In our wheelchairs.

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2009-01-12 04:18:34

#70

ca18 bluebird Online/offline status of ca18 bluebird is unknown

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Originally Posted by snickers

nice well i am pretty certain i remember a cork gasket. This could be good news. I am however surprised to the degree of difference between flow from the different castings

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