355 sbc how much h.p.

[supersmurf666]

Ive got a 355 with 10.1comp,double hump 2.02;s ported/polished,comp cam 305H,strip dominator/ported,and an Davinchi 875cfm carb and 1 7/8 in headers.how much h.p. ya'll think im making???

[burnskustomz1]

Friend had a 355 with double humps 2.02/1.60 milled!! with around the same compression with a little better than stock bottom end but he had a proform 750 and a little bit bigger cam (solid roller herbert) and high rise intake he made around 500 hp to the flywheel.

[bbchevy]

[quote="supersmurf666"]Ive got a 355 with 10.1comp,double hump 2.02;s ported/polished,comp cam 305H,strip dominator/ported,and an Davinchi 875cfm carb and 1 7/8 in headers.how much h.p. ya'll think im making???[/quote
375-425 MAX!
Have Fun!
Later
G 8)

[Tod74]

[quote=supersmurf666]Ive got a 355 with 10.1comp,double hump 2.02;s ported/polished,comp cam 305H,strip dominator/ported,and an Davinchi 875cfm carb and 1 7/8 in headers.how much h.p. ya'll think im making???[/quote
375-425 MAX!
Have Fun!
Later
G 8)

Not even that much. JMO

I say not much over 300

P.S. Take that big carb off of it.It would run better with a 650 cfm


Friend had a 355 with double humps 2.02/1.60 milled!! with around the same compression with a little better than stock bottom end but he had a proform 750 and a little bit bigger cam (solid roller herbert) and high rise intake he made around 500 hp to the flywheel.

no he didn't. jmo

[supersmurf666]

that thing is screamin with that big davinchi on it.so hell no i aint gonna take it off.wtf!!!!!!

[Tod74]

that thing is screamin with that big davinchi on it.so hell no i aint gonna take it off.wtf!!!!!!

Sorry I upset you.

Just stating my opinion that 875 cfm is way more than a 355 ci engine needs. Especially one with double hump heads. The engine would be crisper and more fun to drive with a smaller carb. Unless you are spinning that thing 9000 rpm an 875cfm is too big.

It's your engine ....If you like it, I love it.

[supersmurf666]

na,didnt upset me.that carb is awesome and for what i paid it better be or i would have thrown it through his window!!!LMAO!!!

[bbchevy]

Tod,
You are 100% CORRECT!
My 1st thought was 350-375 But I was BEING Nice!
IF you think Is SCREAMING,then take it the Track and It will tell you DIFFERENT?
Put a 4776 Holley on It and it will Probably p/Up 3-5 Tenths!
Later
G 8)

[Tod74]

na,didnt upset me.that carb is awesome and for what i paid it better be or i would have thrown it through his window!!!LMAO!!!

I hate to even guess what you paid for it.But that money would have been MUCH better spent on some heads.

[MEMRACING62]

X2, Tod is 100% correct. with that big carb its gotta be a bogg dog

[MudWild680]

Cant convince ol smurfy that though.
He swears up and down this monster carb is perfect for that baby motor.


Let him run what he's got, we cant make that motor better for him.
Not by sharing our honest opinions here on the forum which is what he is asking for when posting here.


Oh well

[Tod74]

actually he was just asking for HP estimates.Didn't intend to turn it into a thread putting down his choice of carb.Sometimes I have trouble keeping my opinion to myself.As I said,if he likes it I love it. It's his engine.

[MudWild680]

Yup

Nothing wrong with trying ot make someone elses setup a little better though. Everyone needs help every now and then.

[supersmurf666]

well when it was just an 750 it was a bogg dog.now its a screamer and ya'll are way off on you h.p. figures.but thats ok i understand ya'll now everything...after all ya'll on here aint ya.

[TheRabbit]

well when it was just an 750 it was a bogg dog.now its a screamer and ya'll are way off on you h.p. figures.but thats ok i understand ya'll now everything...after all ya'll on here aint ya.


I agree with Todd on the average set up like yours. However, it's impossible to give you an exact number without putting it on a dyno or at least knowing some #'s from the track. You just may have the 1 in a million 875cfm gulping motor that only needs 1 7/8" headers to make 700hp, but I may be way off that # too. 875cfm is about enough to run a mild 548.

If you didn't think you would get some good advise from guys that knew, you would not have ask so don't be rude to the guys that just answered your question and gave you their opinion and trying to help.

[chevyart]

hey supersmurff your car will run alot better with a smaller carb (650 - 700) and even you header tube size is too large for your combeo probably a 1 5/8 or 1 3/4 inch tube would definitely give you more torque and Horsepower. just my thought. i race and i kinda know this stuff art

[fla1976]

X2.
Those heads are ancient history. The carb is too much with the low compression and lack of cubes. JMO

[traysvega]

I'd have to agree maybe 350 at most, fly h.P.After all a 355 I had several years ago made only 495 fly with 11.5 to 1,world product dart II ported and a 625 625 comp roller..that peak H.P 6900..That was with a good ol 750 DP....

[supersmurf666]

well the good news is im gonna build a new motor with dart block,13.1comp,235cc AFR;s,630 roller,strip dominator with same 875 carb and headers.Gonna spry it with a 250 shot plate system.Oh and I know my current motor is a P.O.S.......See they call me the INSTIGATOR!!!!!!Its all in good clean fun.Just had to make sure you guy's no what your talking about.LMFAO!!!!!!

[JEFF69Z28]

well the good news is im gonna build a new motor with dart block,13.1comp,235cc AFR;s,630 roller,strip dominator with same 875 carb and headers.Gonna spry it with a 250 shot plate system.Oh and I know my current motor is a P.O.S.......See they call me the INSTIGATOR!!!!!!Its all in good clean fun.Just had to make sure you guy's no what your talking about.LMFAO!!!!!!
THIS MOTOR MIGHT MAKE 475-575 HP AND CARB MIGHT STILL BE TO MUCH.

[TheRabbit]

If this motor runs good on the 875, you're gonna need at least an 1,150 tripple pumper for the new motor.
When you get it done show us some pictures.

[Tod74]

well the good news is im gonna build a new motor with dart block,13.1comp,235cc AFR;s,630 roller,strip dominator with same 875 carb and headers.Gonna spry it with a 250 shot plate system.Oh and I know my current motor is a P.O.S.......See they call me the INSTIGATOR!!!!!!Its all in good clean fun.Just had to make sure you guy's no what your talking about.LMFAO!!!!!!

I think the forum just experienced an ID 10 T ERROR.

[ccperf721p]

well the good news is im gonna build a new motor with dart block,13.1comp,235cc AFR;s,630 roller,strip dominator with same 875 carb and headers.Gonna spry it with a 250 shot plate system.Oh and I know my current motor is a P.O.S.......See they call me the INSTIGATOR!!!!!!Its all in good clean fun.Just had to make sure you guy's no what your talking about.LMFAO!!!!!! Seeing how it's all just good clean fun, when you get your new engine in the car let us know, maybe it would be a good race between your car and my 57 year old Mom's small block Malibu.

[traysvega]

well the good news is im gonna build a new motor with dart block,13.1comp,235cc AFR;s,630 roller,strip dominator with same 875 carb and headers.Gonna spry it with a 250 shot plate system.Oh and I know my current motor is a P.O.S.......See they call me the INSTIGATOR!!!!!!Its all in good clean fun.Just had to make sure you guy's no what your talking about.LMFAO!!!!!!

If you do go Dart Block,might as well get some more cubes with it...427 or bigger..My old 422 worked really well in my old vega wagon. 422 afr full cnc 227's(Jesel shaft rockers) dominator carb roller 640/648 267/276 @ .050 Super Victor with a 4150 to domin adaptor,13.5 to 1 went 9.20 @ 2750...

[cepx111]

Just had to make sure you guy's no what your talking about.LMFAO!!!!!!

Yeah us guys "no" a few things - Not -->LMFAO

Hate to sound like a broken record, but ummm, that screaming, bitching a$$ carb you got is too big for a 355 :shock:

[TheRabbit]

Just had to make sure you guy's no what your talking about.LMFAO!!!!!!

Yeah us guys "no" a few things - Not -->LMFAO

Hate to sound like a broken record, but ummm, that screaming, bitching a$$ carb you got is too big for a 355 :shock:

MAYBE IT'S THE MISSING 406 OUT OF THE VAN :shock: !

[ajk]

Did the engine come out of a Corvette? That would explain everything...

[spib]

Did the engine come out of a Corvette? That would explain everything...

LOL :lol:

[Tod74]

Did the engine come out of a Corvette? That would explain everything...

What was I thinking? A corvette block ads 100 hp all by itself.

[fla1976]

If an ordinary engine was installed in a Vette and run for a short time and then pulled out, would it then be a Vette engine? That is the only way I can figure that there are so many Vette engines out there!!! :P :lol:

[MEMRACING62]

If an ordinary engine was installed in a Vette and run for a short time and then pulled out, would it then be a Vette engine? That is the only way I can figure that there are so many Vette engines out there!!! :P :lol: IM PRETTY SURE THAT HOW THEY DO IT IN SELMER & CORINTH AT LITTLEROD RACING :shock:

[Tod74]

If an ordinary engine was installed in a Vette and run for a short time and then pulled out, would it then be a Vette engine? That is the only way I can figure that there are so many Vette engines out there!!! :P :lol:

There is a massive Corvette junkyard in the Western United States. It's exact location is a closely guarded secret.
It where abouts are known only to those that own late 70's or early 80's POS GM heaps.

[ajk]

If an ordinary engine was installed in a Vette and run for a short time and then pulled out, would it then be a Vette engine? That is the only way I can figure that there are so many Vette engines out there!!! :P :lol:

There is a massive Corvette junkyard in the Western United States. It's exact location is a closely guarded secret.
It where abouts are known only to those that own late 70's or early 80's POS GM heaps.I tried Google and could not find it...Going to start reviewing aerial photos on Mapquest one square mile at a time begining in northwest Washington. I will keep you updated should only take a week or five years to locate the location...

[supersmurf666]

thanks for the entertainment guys.Im gonna build the real motor for it this winter......not that ya'll cars but I'll let ya no how it does and when its done.

[Tod74]

thanks for the entertainment guys.Im gonna build the real motor for it this winter......not that ya'll cars but I'll let ya no how it does and when its done.

The corvette motor thing is just an old running joke here...not really directed at you.

[supersmurf666]

I see.I was confused on the vette motor thing.Maybe I should build a bbc so my carb will finally be small enough for ya'll!!!

[mopar1968]

And we all know that them vette engines have 3/4 camshafts in them also :!: :!: :lol: :lol: JMO Mark Arnold

[Tod74]

I see.I was confused on the vette motor thing.Maybe I should build a bbc so my carb will finally be small enough for ya'll!!!

Don't mistake advice for critisism. If you honestly think that engine needs that much carb,then more power to ya...it's your engine.

[mopar1968]

Well said ''Tod'' :!: :!: I also think it is too large but what do we know :?: I have been racing for 20 year's now :!: JMO Mark Arnold

[Tod74]

Well said ''Tod'' :!: :!: I also think it is too large but what do we know :?: I have been racing for 20 year's now :!: JMO Mark Arnold

I've been a "clueless nobody that don't know shit, aint got shit, wanna be heads up racer trying to rotate the earth while repeating stuff I read on the internet" for 5 or 6 years now.

[mopar1968]

:lol: :lol: :lol: :lol: :lol: :? :? :lol: :lol:

[skipjobe]

Man in my day if you had a Corette engine you had something,byw I blew off a C6 the other night in my Camaro.

[cepx111]

Maybe I should build a bbc so my carb will finally be small enough for ya'll!!!

Just make sure it's a corvette big block and you'll be fine :wink:

[bigmack]

you guys are crazy lmao!!!!!!!!!!!

[toohipz28]

I have to agree with Todd too...That is a big carb. You would have to shift between 7500 - 8000 rpms to take full advantage of a carb that size on a small block. Which would be dificult on even ported fuelie heads...

I have a 331 small block, 10.5-1 compression. AFR Heads 195CC, Team G, Holley 800 (I run it up to 7500 rpms) and comp cams mechanical lifter 250 duration at .050 lift and .555 lift....it only puts out about 425hp at the crank...which still works out to 12's on my all steal '72 nova!!!

hope this helps and good luck!

[toohipz28]

I agree with Todd too...you would have to run that engine up past 7500 rpms to take full advantage of that carb even with ported fuelie heads!

I have a 331 SBC... 10.75 to 1...AFR 195 CC Ported Heads, Team G intake , Holley 800 (I run it up to 7500 rpms) Comp Cams Solid Cam 250 @ .050 with .555 gross lift. I am making about 425 at the crank and thats with some pretty decent heads!

Hope this helps as a reference! Good luck!