I'm a bit confused on what I wanna get. A good friend of mine (TunedPerformance) gave me 2 cams to choose from, xe276 or 280xfi. My setup is as follows: ported HSR plenum and base, AFR 1040 heads, Summit Racing 1.6 aluminum roller rockers, EDL TES headers and y pipe. I will be getting a custom tune from TunedPerformance based on data logging. Any advice guys? If needed, I will start a new thread.

 

280XFI is the best choice a you should get Dyno Dons headers.

 

I second that, its pretty much the same setup I have and it works well. Enjoy!

Also the edelbrock headers are junk, I would go with the dyno don, or a long tube setup (if you want to deal with the hassle)

 

I just realize that I started this post 6 years ago back in 2008.

 

Cool. Thanks guys. Dont wanna hijack the thread. So this thread has history. Haha.

 

problem is that I dont wanna spend too much money if I go longtubes (meaning that I would need 2 mufflers).

 

Go long tubes, with a y-pipe and then single 4". I only have one muffler.
Don't go with dual exhaust

 

Do you have any pictures of that longtube & ypipe setup?

 

https://www.thirdgen.org/forums/exha...ml#post5579075

 

 

Any updates from these projects?

 

Would love to get an update also! I'm about to start my swap soon 355,10.5cr, afr 195 w/8002 springs , 1.6rr, 32lbs ported sr, custom cam xfi224-230 .560s lift 112. Hoping for 350-375whp with 700r4.....

 

Those heads have the longer valves for that spring spec installed height? (2.00"). Those are some stiff springs for hyd roller. Any less than 2.00" install height and pressure is hust about too much for gm type lifters. Would need morels

 

I talked to afr and the tech guy said the pressures will be fine with the cam and ls7 lifters but yea Im not sure about it still. Is there a way to shim the springs to lower the pressure? I priced it out and to change to the 8019 I THINK is the number it would cost like 400+$ so I'm not sure what to do. Also not sure what push rods ill need yet.

 

It will work if head really is 2" install height, just on the border line of needing better lifters. Most dont seem to like goin 450+ open pressure on ls7's. Its slightly overkill anyway. I run 180/450 lbs seat/open on a much bigger cam under loads of boost plus heavier valve than whats in the 195's and i'm sure it could spin 7500 rpm. Its been 7200 no problem so far

 

Another update .

SBC 400 with only 9.4-1 compression.
Ran a best of 12.1@111 na and 10.95@121 with a 125hp shot

Very streetable

 

Well here's my update! Not too bad for the 280XFI cam.
https://www.thirdgen.org/forums/sout...ml#post5860255

 

Alot better than i expected that cam to do in a 388" type motor. Heads and intake are working well. Then again the manual trans shows better dyno numbers but still good