Chevy86 IROC-Z

iTrader: (17)

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.

VincentZ28

iTrader: (2)

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

conlinj

iTrader: (3)

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)

VincentZ28

iTrader: (2)

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

Chevy86 IROC-Z

iTrader: (17)

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

Chevy86 IROC-Z

iTrader: (17)

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

LB9GTA

iTrader: (1)

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

Chevy86 IROC-Z

iTrader: (17)

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

LB9GTA

iTrader: (1)

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

Chevy86 IROC-Z

iTrader: (17)

VincentZ28

iTrader: (2)

Any updates from these projects?

355tpipickup

iTrader: (5)

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.....

Orr89RocZ

iTrader: (20)

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

355tpipickup

iTrader: (5)

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.

Orr89RocZ

iTrader: (20)

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

LB9GTA

iTrader: (1)

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

VincentZ28

iTrader: (2)

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

Orr89RocZ

iTrader: (20)

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