I just sold my 305 H/O for other reasons and I am thinking of downsizing to a 2.8 this time round.

Tech data says they have around 102-135hp depending on the year. How much more can they go?

Im not really interested in nitros, so is 200hp asking to much?

 

yes 200hp is asking to much. A well prepared 2.8 should run around 160-180hp

 

What would that involve then to get that 160-180hp? Parts and price estimate would help me a lot.

 

I think I beat KED to it! Get a 3.4!! LOL Ked will give you all the details. But his 3.4 has 160 off the bat, rite Ked??? You might as well since you're doing an engine swap anyways.

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Stock 2.8 MPFI auto w/ Flowmaster 80 Series, More to come......
New Pioneer Head Unit
Targa E-910 7-Band Equalizer w/ crossover
2x 10" Pioneer subs powered by 300 Watt Jensen amp
2- 6x9" Pioneer (rear)
More to come..... (hey, i dont got a job yet)

 

Hey, it is a totally great swap!!
I have blown my tranny with the new found power from this swap of 2.8->3.4
Read this, get back to us. Make a copy for notes & such when ya do the swap!
Have fun.
https://www.thirdgen.org/messboard/F...ML/001462.html
The BEST PART, is the 200 FOOT POUNDS OF TORQUE. Down low RPMS.
These are high reving engines.
With this boost in engine size, you gain back alot of seat in your pants fun!
You would be pleased!
I'm gonna add nitrous after a Posi!
I care about ET's, not HP.

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Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA

 

....then when you desire more power, raise your compression and get a custom chip.......hehehehehehe

(sorry, i had to get my dig in)

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Slayer of the following:
2000 saturn
198? Ford Crown Vic, (no i don't know why he bothered)
1990 Buick LeSabre 3.8
1986 Camaro 2.8

 

get a edelbrock intake manifold,600cfm carb,headers,bigger valves,bored .040 over,port&polish heads,edelbrock camshaft.
thats all i can think of off the top of my head.

 

want more ideas look up at my 2.8 power recipe

 

My bad, I meant I sold the whole car. Thing was literally falling apart and I didnt have the money to fix it up allong with my other project car. (72 vette)

The 3.4 swap definately sounds good. That kinda touque and the weight loss from not having a 305 probably makes it a nice even matchup eh? Dont suppose you have pics of it up anywhere?

I dont think I will go that route tho. I dont have any 'reliable' help so its gonna be just me under the hood.

So say I find something like an 84-86 v6, what would be needed to give them about 150hp to start with?

 

edelbrock performer plus camshaft kit #3790
edelbrock performer intake manifold base#3785
edelbrock performer intake manifold top #3789
bore .030 over
newer mpfi heads
push rod 7 rockerarm kit
complete engine rebuild kit
double roller timing chain
flow tech performance headers
dynomax exhaust system
valve spring kit
accel plug wires
accel coil
complete tune-up
k&n air & oil filter
edelbrock 600cfm carb
1" carb spacer
those are some ideas for carburated 2.8
that you can do on your own

 

if you dont want to get a complete new intake manifold,port and polish the origanal one and go to autozone and they have carb adapter so you can put a 4bbl carb on a 2bbl intake manifold.

 

Okay, First off start your new V-6 out with TomP's famous Tune-up, this should get you back up to about original working order.

Then do some mods, like K&N filter(s), TB Bypass,and Flow master exhaust.
The some more advanced mods...
Crane Cam 2030, and Roller rockers. Porting of you exhaust and intake ports, etc.

I think those should put you in the range of 150Hp,

(Instead of a Crane Cam 2030 if your on a budget, talk to Ked about the 3.4 Litre cam Swap he has been talking about.)


Sorry I forgot these are mods that I was thinking of for a car with MPFI...


[This message has been edited by Joe_L (edited July 24, 2001).]