350 Chevy crate motor bhp

[Bee]

Probably been asked before, but can anyone tell me what a bog standard 350 chevy crate motor will put out in bhp?

[langysrodshop]

They come in a variety of flavours which are 210bhp, 290bhp & 330bhp if i remember right.



Probably been asked before, but can anyone tell me what a bog standard 350 chevy crate motor will put out in bhp?

[Zody]

Probably been asked before, but can anyone tell me what a bog standard 350 chevy crate motor will put out in bhp?

Today's bog standard 350 crate motors are normally 240 bhp, anyway the one's built in mexico, 4 bolt mains.

Roadcraft are doing them for £1400.00.

[leepop633]

Sorry i dont know a definate answer but it depends on what crate motor you buy really.

[Jonny69]

Today's bog standard 350 crate motors are normally 240 bhp, anyway the one's built in mexico, 4 bolt mains.

Roadcraft are doing them for £1400.00.
How complete is that engine for that price? Ie. do you get intake, carb, dizzy, rocker covers etc?

[eeb43]

a mate of mine fitted one in a race car guaranteed 350 bhp using the specified carb inlet and headers it actually produced on a rolling road 267 bhp we can only assume that american horses are alot smaller tha our british variety

[langysrodshop]

The yanks measure BHP different to us.

[Zody]

How complete is that engine for that price? Ie. do you get intake, carb, dizzy, rocker covers etc?



Have a look for yourself.

www.roadcraftuk.co.uk

[Bee]

Thanks everyone for the information. I will probably go along with the 240bhp figure (I suppose a rolling road is the only proper way to find out)
The motor in question was purchased through Mr Reid a few years ago.

[Briz]

a mate of mine fitted one in a race car guaranteed 350 bhp using the specified carb inlet and headers it actually produced on a rolling road 267 bhp we can only assume that american horses are alot smaller tha our british variety

Rolling road HP is obviously going to be a good deal less than when it's measured at the crank.
Losses thru the drivetrain are clearly going to be considerable.
And if you're selling engines in a crate, you can only be expected to give crankshaft HP.

[Tudor Simon]

For the Goodwrench basic crate motors (the ones Reidy had for about £1,200 years ago) Real Steel catalogue quotes their dyno test at 254bhp @ 4000 rpm and 360 lb/ft torue at 3000 - with a Holley 600cfm, Edelbrock Performer inlet and 1 3/4" headers.

In the real world its a decent grin factor

[bladerunner]

..i coudnt find one for 1400 quid on the roadcraft site..baz

[30psi]

..i coudnt find one for 1400 quid on the roadcraft site..baz

http://www.roadcraftuk.co.uk/index.asp?productID=RUKENG001&display=main&Col_Category=Crate+Engines&Col_SubCategory=Long+Blocks&Col_SubSubCategory=Chevrolet

[evilzee28]

The yanks measure BHP different to us.

Hi Langy, how do they differ from us? is torque different too?

[Adam]

They used to measure gross power till the 70's then it was net like we do here i.e. all ancilleries bolted on. Also it depends on if it is measured with 1.5 inHg or 3 inHg. So the power figures of the 60's are largely over rated compared to a similar set up measured in the late 70's onwards. Horsepower is a equasion of torque x rpm divided by 5252 so actually it was the torque that was measured differently as this equasion never changes regardless of engine size or cylinders.

From what I remember crate engines were 245hp - 260 hp & 290hp from the factory. truck crate engines are rated lower.

The only difference between the 260hp & 290hp is the cam so if you intend to change it anyway go with the 245hp engine as it's cheaper by about $200.oo.

[STEPSIDEBILL]

crate 350 from reidy,when he was about,180 at the flywheel and 210 at the wheels.rolling road dyno.

[Alcoholic Rat]

You sure you got those numbers the right way round bill????;)

[evilzee28]

They used to measure gross power till the 70's then it was net like we do here i.e. all ancilleries bolted on. Also it depends on if it is measured with 1.5 inHg or 3 inHg. So the power figures of the 60's are largely over rated compared to a similar set up measured in the late 70's onwards. .

Hi Adam, thanks for the reply, I understood that in the the past the Yanks measured it differently, it's just that Langy was implying that they "measure" (present tense), not "measured" (past tense) it differently. I read that to be, that they still measure it differently to us nowadays. The original question was about current horsepower figures, hence my question of how it differed.;)

[Adam]

They still can measure it differently as can one dyno from another here or anywhere due to differences in tolerances. The same engine in different cars will have different readings on the same chassis dyno with different gearboxes and rear ends. What you effectifly end up with is a base number for a particular engine in your application. A datum point if you like. An engine dyno is the best way to measure torque and HP but for a crate engine is overkill! Stick it on a chassis dyno for an hour to fine tune it once in. They will be close to each other as some chassis dynos measure the frictional losses of the box etc as the vehicle decellerates and adds that factor in.

All I'd say is that if you wanted to use a chassis dyno find one thats reccommended then use that one again to check any improvements you think you have made.

The crate engine hp values also depend on a lot of assumptions. A dual plane manifold, a 600cfm carb and headers. Stick a stock iron manifold, 2 barrel and log iron exhaust and it won't make as much.

[kapri]

It wasn't just the Yanks who measured it differently so did we starting with SAE and moving onto DIN, that's why a 10:1 Rover is measured at 188bhp and a later SD1 engine at 155 yet it didn't go down in power.

The only bhp figures worth a damn are at the rear wheels and even that can vary from rolling road to rolling road. Unless you are actually going to race it tell everyone it's 300 bhp anyway ;)

[SpannerPete]

The US rating shouldn't be that much different to UK but like most things they probably get
exaggerated.

Found this, assuming it's correct then there is 1.4% difference.

" Rating Standards. (what conditions the car was tested in to get its power rating)

EEC: European standard. Measure at 99kPa and 25°C. Rated in kW.

SAE: American standard. Measure at 99kPa and 25°C. Rated in hp. 1kW = 1.341hp (SAE).

DIN: German standard. Measure at 101.3kPa and 20°C. Rated in hp (ps). 1kW = 1.360hp (DIN).

JIS: Japanese standard. Theoretically same as DIN, but we always find it is actually smaller.

British Horsepower: same as SAE. Rated in bhp (could be confused with brake horse power). "