355 SBC HP question???? [Archive] - Chevy Nova Forum

: 355 SBC HP question????


Red6T5
12th-April-2010, 11:52 AM
Where can I find out what the component combos would be to get the highest possible HP from a 355 SBC with no power adders that i can run on pump gas and run on street without hi temp issues!?!?!? What is the highest HP obtained from a 355 with no adders???

D-Man
12th-April-2010, 12:00 PM
Where can I find out what the component combos would be to get the highest possible HP from a 355 SBC with no power adders that i can run on pump gas and run on street without hi temp issues!?!?!? What is the highest HP obtained from a 355 with no adders???

I can tell you I personally saw a 358 make over 960 naturally aspirated.:yes:
But it was NO WHERE NEAR a pump gas, "Street" build.:no:

As for what you are actually looking for.....450-475 can be achieved pretty easily if the budget is there for quality parts and machining.:yes:
500-525 can be had if you've got the budget for the added porting and tweaking.:yes:

As for trying to copy someone else's combo....:rolleyes:
VERY FEW are ever happy with the outcome.

All of the components need to be matched to YOUR build requirements, budget, driving style and chassis.:yes:
Ignore ANY of those during the build and you'll regret it later.:yes:

veno
12th-April-2010, 12:28 PM
High HP comes at a price in two areas.... dollar per HP cost.. and Drivability.. a 600hp 355 it going to be temperamental....

based on your question.. I would say your tuning skills may be lacking for this type of configuration...(if I wrong I apologize)...


next is cost in maintaining a 355 making High HP... a very aggressive solid roller cam, very costly roller lifters.. and when I say costly? 550. in lifters...... them comes a converter.. 4500 min.. that's 500 to 900... then the trans to handle such brute hp.... humm 2k? then replacement parts, springs, lifters, etc...

the 355 will cost ya around 10K by the time its all said and done to get a reliable, well built, well thought out, turnkey engine...

build a 406 make 500hp and have fun..

or get you self a LQ9, some L92 heads.. a wicked bump stick.. some computer time... and bingo...

Paul Wright
12th-April-2010, 12:46 PM
The highest normally aspirated is arguably being explored in the Nascar engine development. If they didn't have rules handicapping them, I would guess that 1,000 hp might be possible albeit with high compression. With low compression and pump gas you are limited by detonation. More power means more cylinder pressure.
If you don't care about drive-ability you could raise and narrow the power band. Maybe 600 hp at 9,000 rpm and nothing below 7500. Would you want that? I doubt it.

levisnteeshirt
12th-April-2010, 01:18 PM
A 355 needs 2 things to kick a 383 or a 406's butt ,, one being alot of rpm ,, another is more gear than most people have stomach for

a big block is cool ,,, but i love to hear a 355 streah out above 7500 ,, ahh ,, so nice

D-Man
12th-April-2010, 02:51 PM
A 355 needs 2 things to kick a 383 or a 406's butt ,, one being alot of rpm ,, another is more gear than most people have stomach for

a big block is cool ,,, but i love to hear a 355 streah out above 7500 ,, ahh ,, so nice

7500???? That's just getting started for some.:devil:

That's the age old theory that still rings true.

Build it small and twist it to the moon or build it BIGGER and let it live in a more moderate RPM range.

The only downside is when you find someone that has built theirs bigger AND twist it to the moon. Then poor little Pee-Wee looses every time again.:yes:

The same can be said for the die-hard N/A guys.
"Mine's all throttle-NO bottle"...
"Bottles are for babies."....
etc...

The problem there is when someone builds a comparable engine to their N/A combo and tickles it with a little of the funny stuff.:yes::devil:
Who do you think the winner is?

veno
12th-April-2010, 03:54 PM
in 1975... built a old school LT1... complete with TRW 11.25 pistons, a TM1 4 bolt block, pink rods, 1148 steel crank, 8" SHP balancer, heavyduty flex plate.. 3310 holley and a unilite.. the only deviation was a set of 492 casting turbo heads... and a set of crane gold rockers, actuated by a crane Fireball solid lifter cam... and crane pushrods...

the engine prolly made a honest 400 to 420 hp... that was smokin in 1975

the 56 chevy saw regular street duty.. at the local street dragstrip...for 4 years....

it saw 8500 shift points when needed:D... (god hepl us:D) all this on a vega converter, a 100,000 mile T350 with a Transgo shift kit, 8" recap circle track slicks (G-60-15)....

man were we smart! :rolleyes:

levisnteeshirt
12th-April-2010, 06:32 PM
sounds like 1975 was good to you

in 79 ,, one of my friends had a 355 that still amazes me to this day ,,

i've mentioned it on here before ,, i swear it would go to 8000 with a hyd cam but you don't see hyd cams like that made anymore ( 320 adv dur 500 lift, 114 LSA -Lunati cam )

it had stock rockers ,, stock pushrods , 3310 on the old 327 vette -holley intake

it would streach your arms out ,, lemme tell ya ,, rumbled till 5500 ,, look out after that , it pulled hard

4 speed car with a 513 ,, it was wicked ,,, no need to pull out in first gear ,, you could nail it off of a roll in 2nd and the smoke would roll off the old bias ply tires, about the tallest and most wide 60 that nationwise sold ,,, it was alot of fun

Ironman
12th-April-2010, 06:41 PM
The Vega converter! Passed one at a swap meet the other week and almost picked it up!. My old neighbor growing up took his Vega converter(ed) sbc nova to the finals at Reading years back.....

Necro
12th-April-2010, 06:44 PM
my 355 dynoed 548hp .
11.5 to 1 , lightly ported vic jr heads, team g intake, lunati solid roller , 1.6 rockers, 950 carb , 93 octane and a cam 2 mix, it can be done, if i take out timing , use straight 93 and a 850 carb , it made close to 500. we tried several combo's , made 480 to 548 , i have a dyno sheet around somewhere in the garage. which means one day ill find it.

RED67
12th-April-2010, 08:24 PM
in 1975... built a old school LT1... complete with TRW 11.25 pistons, a TM1 4 bolt block, pink rods, 1148 steel crank, 8" SHP balancer, heavyduty flex plate.. 3310 holley and a unilite.. the only deviation was a set of 492 casting turbo heads... and a set of crane gold rockers, actuated by a crane Fireball solid lifter cam... and crane pushrods...

the engine prolly made a honest 400 to 420 hp... that was smokin in 1975

the 56 chevy saw regular street duty.. at the local street dragstrip...for 4 years....

it saw 8500 shift points when needed:D... (god hepl us:D) all this on a vega converter, a 100,000 mile T350 with a Transgo shift kit, 8" recap circle track slicks (G-60-15)....

man were we smart! :rolleyes:

1975 was a good year :yes:
24 years old,, 1967 Nova; 331",12.5 TRW's,stock rods,2.02 Angle Plugs,4780/800DP,TM1,GK .518-.531 Solid Cam,1 7/8" Kustom Fender wells:eek:,,2.64 Super T10, Steel flywheel w/Lakewood shield,5.14 12 bolt,M&H Slicks at 3000lbs, 11.30's at 118 was pretty respectable around here.
As said above,,,we thought we where smart:rolleyes: :D

:devil:

D-Man
13th-April-2010, 10:54 AM
1975......

I was still in diapers and getting a *** in my mouth every time I cried.:D

Yeah.......THAT trick don't work anymore.:no: