3v stroker

[1bad99]

I have a 2007 GT with eagle rotating assembley arias pistons .020 over with long tube 1 3/4 headers, JLT cold air, 4.10 gears, 3000 PI conv. tru x pipe 3in exhaust with bullets with comp cams stage ones (127050 just found out today) ported n polished heads. dynoed 337rwhp with 340 trq i ran a 12.65 at track... would you say my cams are slowing me down a bit there...

if the ones i have now are 253/270 with 450/450 lift intake and exhaust lobe seperation is 114 and stock cams i beleive are 193/216 with 432/432 lift

all help is appreciated thanks

 

[BruceH]

A set of 127500 would probably do wonders. Longer duration, more lift. The downside is you will need springs and phasers. The upside is with stiffer springs you can safely rev to 7k without fear of valve float.

Are you planning on staying na? If you have plans for forced induction I'd keep what you have for now. There are a set of 127350 cams and springs in the classifieds for a good price, they are fairly close to the 127300 and don't require phasers.

 

[retfr8flyr]

What compression ratio are you running? This cam http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=980&sb=0 would be perfect for you but don't run the Comp phaser limiters, use the Livernois made ones and the Livernois springs work well also. I will have a pair of phasers with Livernois limiters already installed for sale shortly. I ended up with an extra set from my rebuild.


Earl

 

[BruceH]

Here's a link to comps 3v brochure. It's a little easier to do comparisons with it. They also have an online suggester thing that you answer questions and it makes recommendations.

http://www.compcams.com/3valve/COMP5-124.pdf

 

[1bad99]

im planning on spraying about 100-200 shot off the line..... and im running about 10.8-11.5 compression not 100% sure i am running arias pistons .020 flat tops with 3valve releifs -1.68 and say they are 12.1:1 @ 46cc heads..

i have stock heads port and polished so i say between 10.8-11.5 compression

yea that the same one i have opened up on my desktop lol been reading it all day i first thought i had the 127100 cams but no i searched through my stuff and found out they were 127050 and was making 337 rwhp and wondering if this is my problem

 

[BruceH]

Use this for compression ratio. http://www.wallaceracing.com/cr_test2.php

Stock heads are 51.3 cc, frpp cnc and livernois are 53cc except for the most radical (stage 3?), they are 48cc. Did you measure how far the pistons are below the deck at tdc?

 

[1bad99]

no i didnt measure the deck but it was just stock deck height

 

[BruceH]

no i didnt measure the deck but it was just stock deck height

The combination of piston, rod, and block will vary.

If you wanted to ballpark it I'd use .015, 53cc for the heads, .035 for the head gaskets, and 1cc for valve relief.

Using those figures it comes out to 10.88.

 

[1bad99]

Yea so I'd say between what I said ? What u think