vortec 2.02 or 2.05

[STORM TROOPER]

i am looking for some feed back i am about to get my valves done and i am unsure of what valves to get i am going with a 67mmbb it is 40over and 4 bolt w/eagles.thanks in advance for all replies....TYPHOON LOVE thats right she is my bitch:rotf:

 

[sy445]

Re: vortec 2.02 or 2.05

Thats my combo, dont bother with the 2.05 unless your really reving high rpm. Most vortec heads wont benefit from that size over the 2.02 as they dont flow enough, you start running into making flow worse in the short turn of the runner and shrouding inbetween the chamber wall and valve, just my opinion from flow bench experience

 

[cloneman315]

Re: vortec 2.02 or 2.05

x2

 

[turbodig]

Re: vortec 2.02 or 2.05

The tighter the gap between the valves, the more susceptible to cracking.

 

[Windedv6]

Re: vortec 2.02 or 2.05

When Flowtech set up my heads they convinced me to stay with 2.00 as for the reasons mentioned above. They were right as I ran as high as 28- 30# boost with a 412 and later a 422 cam pushing my 4,150 lb AWD Ty into the 10.60 et range. That would put a Sy into the 10.00 to high 9 et range.

I recently rebuilt the motor and installed a set of Brodix heads and had the vortecs checked. They were still perfect. No need to push the valve size in my opinion.

John

 

[STORM TROOPER]

Re: vortec 2.02 or 2.05

thanks guys i called the shop and told the to do the 2.02s:tup:

 

[cloneman315]

Re: vortec 2.02 or 2.05

john what was your combo build again?I am wondering how mutch i might have left in mine with a turbo change maybe,

 

[Windedv6]

Re: vortec 2.02 or 2.05

john what was your combo build again?I am wondering how mutch i might have left in mine with a turbo change maybe,

Bowtie Block
Billet crank - stock stroke
Eagle rods
Srp pistons 4.020 bore
Total seal rings
Cometic Head gaskets
APR Head Studs
Vortec Heads 2.00 intakes, 1.5 rockers, Pro built by FlowTech
412 Cam - 10.80s et
Custom Cam Similar to 422 - 10.60s et
75# injectors
42# Fuel pressure
72GTQ turbo
110 Octane Sunoco gas
28 -30 lbs boost
26* timing at WOT
11.8 - 12.2 AFR
EGT - 1,650* (Sensor located in turbo housing)
Royal Purple "Racing 41" oil
Autolite AR103 racing plugs - gap .030

FAST Engine Management
3,300 stall
Hartman Built 700r4 trans
ATR Headers
McCoy ATA - 135* at WOT

John

 

[cloneman315]

Re: vortec 2.02 or 2.05

bowtie block etc i see,stock compression?,I wish i had the extra cash to put more port work in my heads,i think that might be a little hp wasted,and i was wondering on a bigger turbo

 

[SY2455]

Re: vortec 2.02 or 2.05

? about the Vortec heads. I have been thru the search button, but I couldn't find anything that would show that much of a difference. Being the heads flow so well with the stock 1.94 valves, Is there enough flow increase to justify putting in 2.02 valves?

 

[It's just a six]

Re: vortec 2.02 or 2.05

When Flowtech set up my heads they convinced me to stay with 2.00 as for the reasons mentioned above. They were right as I ran as high as 28- 30# boost with a 412 and later a 422 cam pushing my 4,150 lb AWD Ty into the 10.60 et range. That would put a Sy into the 10.00 to high 9 et range.

I recently rebuilt the motor and installed a set of Brodix heads and had the vortecs checked. They were still perfect. No need to push the valve size in my opinion.

John

I second the 2" ,the Vortec heads get too thin otherwise & the gain I would be pretty confident it would be a marginal gain..

 

[SY2455]

Re: vortec 2.02 or 2.05

? about the Vortec heads. I have been thru the search button, but I couldn't find anything that would show that much of a difference. Being the heads flow so well with the stock 1.94 valves, Is there enough flow increase to justify putting in 2.02 valves?

Anyone? Are the 1.94 called 2" when it comes to the Vortec heads?

 

[Windedv6]

Re: vortec 2.02 or 2.05

Anyone? Are the 1.94 called 2" when it comes to the Vortec heads?

No.. 1.94 are 1.94 vs 2.00 are 2.00

You should have them cut to 2.00 and install Hi temp SS valves. Much better for a turbo motor.


John