thats it i have decided

[splatspeed]

Hi all

i have finally made a decision

for stage 2 of the ultima i am going to go for a 302 ci engine

i know i am in for a headach not keeping to standard 350

but the decision is made

[shithotfast]

everyone else has been going the other way.... i.e bigger, so why smaller (although size isn't everything I keep telling the wife!)

So will my 355 not be the smallest Ultima engine any longer??

[gtr-tt]

shithotfast said:

everyone else has been going the other way.... i.e bigger, so why smaller (although size isn't everything I keep telling the wife!)

So will my 355 not be the smallest Ultima engine any longer??

Mine is smaller than 350

[chuntington101]

splatspeed said:

Hi all

i have finally made a decision

for stage 2 of the ultima i am going to go for a 302 ci engine

i know i am in for a headach not keeping to standard 350

but the decision is made

is it still going to be a chevy lump or are you going for a ford one????

thanks Chris.

PS you not putting something a little more modern in there are you???

[splatspeed]

no it is going to be a converted 350 chevy

to 302

i think the sweeds have the smallest unless there is a 3.5 v8 version around???

4.0l lexus is the smallest i know of

[t5grf]

I looked at a Rover V8 engined sport 4 years ago (3.9 litres), and I seem to remember someone on here running a highly tuned 2 litre Cossie Engined sport.

[Mr Mac]

I'm putting a 305ci SBC in mine, there are plenty of articles around that say you can get 350bhp and good torque out of these lumps. They are also very cheap - mine cost me £156!!!

I have spoken to an ex Tyrrel engine builder who rekons that 400bhp plus is pretty straight forward with a decent pair of heads - I'm guessing that at this point it would be cheaper to buy more ci....

Why 302ci?????

Mr Mac

[splatspeed]

Mr Mac said:

I'm putting a 305ci SBC in mine, there are plenty of articles around that say you can get 350bhp and good torque out of these lumps. They are also very cheap - mine cost me £156!!!

I have spoken to an ex Tyrrel engine builder who rekons that 400bhp plus is pretty straight forward with a decent pair of heads - I'm guessing that at this point it would be cheaper to buy more ci....

Why 302ci?????

Mr Mac

302 has the 350 4 inch bore

but the 3 inch so it is reduced from 4 inch to 3"

think 305 is a smaller bore

[Mr Mac]

That sounds about right

305 has a 3.736 bore and 3.48 stroke
302 has a 4 bore and 3 stroke

I guess this make the 302 rev a lot harder?

[eliot]

ive heard a 327ci sbc and it seemed very revvy - not sure what combo is.

[Mr Mac]

Had a look around for a 302 - pretty rare engine unless you build from scratch.

Good write up on a new build here:

www.hotrod.com/techarticles/302_small_block_chevy_engine_build/

And the Dyno runs are here:

www.hotrod.com/techarticles/302_small_block_chevy_dyno_test_tune/

That's impressive - 550bhp and 23mpg in a ’65 Chevelle!! I'm begining to like your thinking.

[splatspeed]

thanks mac

[splatspeed]

eliot said:

ive heard a 327ci sbc and it seemed very revvy - not sure what combo is.

think the 327 is the 305 with a 4" bore

[Mr Mac]

Nope, that would be a 350, the 327 has a 3.25" stroke. The 305 and 350 both use the same crank and have a 3.48" stroke. This is what makes the 305 "not a good" engine......but I like a challenge!! What you want is a small stroke and large bore (as per 302ci) which allows the engine to rev harder. Longer strokes are better for torque at the bottom end but top out much further down the rev range.

Have a look at this site for most of the combinations:

www.mortec.com/borstrok.htm

Mr Mac

Edited by Mr Mac on Friday 23 March 13:54