2.8 performace

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#11

02-03-2010, 01:20 PM

stealthwizard89

Newbie

Join Date: Dec 2009

Posts: 29

ooo and putting a big block no u dont half to cut its just a tight fit the fbody camaros can almost fit anything ebay was selling a 1987 camaro 502 big block omg wow it was nice anyway the firewall wasnt cut but u do need beeter supports and shocks and mounts

#12

02-03-2010, 02:00 PM

1990CamaroRS

Fancy Sparkle

Join Date: Jun 2007

Posts: 1,119

Quote:

Originally Posted by Gorn

I know I am new to the 3.4 but how can putting the head off and 170 hp car and putting them on a 165 hp car get you 235 hp? My understanding of the upgrade is with the old 3.4's the heads where a limiting factor. If you wanted to build a 235 hp motor the first step is the heads but you still need Cam/rockers, compression, intake, MAF and exhaust to make the car 235 hp. The cost of this would be greater then a 350 upgrade.

Oh 235 HP on a 2.8 is a rolling bomb waiting for someone to push the plunger.

on the 3.1, the heads are the limiting factor. a lot of guys have picked up 20-30hp off of just swapping to 3.4 heads. the 3.4 heads flow better, and don't hit a brick wall at 4500rpm.

and where did you get a 2.8 being rated at 165bhp??? last i checked the carbed 2.8 was 102bhp and the MPFI 2.8 was 125bhp.

#13

02-03-2010, 03:15 PM

Gorn

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Quote:

Originally Posted by [god]speed

I think from 98+ (grand am's etc) you will get about 70 hp more also being aluminum heads it shaves off 50 pounds. in a 3.4 i figured it would crank out 235 hp (manual trans)

He is talking about bolting 3.4 FWD heads onto a 3.4 RWD block. That is where the 165 HP comes from. I know a little more about the swap now. The 3.4 FWD heads greatly increase the compression of the 3.4 FWD block to well beyond what either motor had. Something like 13:1.

Last edited by Gorn; 02-03-2010 at 03:19 PM.