Power increase Holley 4150/4160 on a Edelbrock intake

[Arns85GT]

I'm installing a 4160 Holley, 390 cfm carb over a Edelbrock Torker II intake on a 2.8 v6.

Everybody has different opinions on the power increase.

The current top end on the engine is a 318 cfm MPFI system. I know the carb setup is good for more horses, but how many?

The engine is the high output 2.8 in a 1985 Fiero.

Does anybody know about this rig from experience? especially anybody who has a Dynomometer?

[Guest]

See your intake might flow 318 cfm stock fiero setup but you have to remember, it doesnt' matter what the intake can flow it only matters what the heads can flow. if you dont' touch the heads or cam, you might see an increase but it won't be anything mind blowing by any stretch.

The stock intake does see improvement by adding a larger tb so there is extra hp there. About 4 as it was dynoed by me. SO you will see a increase for sure but to say how much is anyones guess untill you get it on a dyno. And also where the increase will be. Its going to change your power curve.

[Arns85GT]

The heads handle up to about 175 hp. When you add a big intake plenum and exhaust it goes up to about there before porting is required.

The question is what the 390 cfm carb supports. On a V8 it will support quite a bit of hp. So will it take the engine to the limit built in to the heads?

That is the question. I expect it will but I don't have data to show it.

[Guest]

The heads handle up to about 175 hp. When you add a big intake plenum and exhaust it goes up to about there before porting is required.

The question is what the 390 cfm carb supports. On a V8 it will support quite a bit of hp. So will it take the engine to the limit built in to the heads?

That is the question. I expect it will but I don't have data to show it.

How do you know the heads handle up to about 175? Where did you get that number from? Is there any scientific data backing this up or did you hear this from a guy who heard it from a guy??

Actually a 400 cfm carb wont' support that much hp on a V8.

And yes the intake with the carb will prob flow more then what the heads can actually get into the cylinder. You could have a intake capable of flowing 1000cfm but if the heads can't get anywhere near what the intake is able to flow then whats the point??

[Arns85GT]

How do you know the heads handle up to about 175? Where did you get that number from? Is there any scientific data backing this up or did you hear this from a guy who heard it from a guy??

Actually a 400 cfm carb wont' support that much hp on a V8.

And yes the intake with the carb will prob flow more then what the heads can actually get into the cylinder. You could have a intake capable of flowing 1000cfm but if the heads can't get anywhere near what the intake is able to flow then whats the point??

Gerbil, you obviously have no clue at all about the subject.

A 4160 model 8007 supports up to about 230 hp on a V8. Ask Holley if you don't believe me. I won't argue the point.

If you don't have the answer to my question, don't clutter up the thread with your own question. I am not going to tell you how I know the heads max out at about 175 hp without porting because that is not the issue of this thread or the question under discussion.

The question is, has anyone dyno'd a 2.8 to see the results using the 4160 model 8007(or 4150) and the Edelbrock Torker II. Edelbrock only posts the torque figures using their Performance Plus package. There is no hp data on the Torker II with the recommended Holley 390 cfm carb.

Anybody got any data on this application?

[Guest]

HOLY shit a whopping 230 hp on a V8!!! Thats amazing!!!! I back up my original statement. A 400 cfm carb will not support that much hp on a V8. Sorry but 230 hp is "Not that much." If you think 230 hp max is a lot of hp well then you have brain damage. I tried to help you but apparently you already seem to know almost everything. Why dont' you just go back to the Fiero board and ask them. Or I guess you already know you wont' recieve any tech help over there either cause most people over there dont' know squat??

I can guarantee you I know a hell of a lot more about these little engines then you do. Sh!t I bet I have forgetten more info then you can even dream of knowing.

And calling me a Gerbil. Ouch that hurt. Make a couple more posts on this board and you will be Gerbil bait too. But I guess for now you are just a pathetic noob.

So basically you want people to share tech info with you but then when I ask you a specific tech question about how you know something you tell me to get lost?? Go Phuck yourself.

[Bryan1970]

i don't want to start a riot or anything but a 390cfm 4150 will support respectable power on a small block.Like 440 HP on a 383ci with the right kind of supporting components. However i do agree with Shaun41178 in that to really take advantage of a free flowing intake you should definatly ports the heads, change the cam and put on a free flowing exhaust.

[bszopi]

Why do people always bring up the "I've probably forgot more about these engines that you've ever known"? That has to be the gayest comeback ever....

Quit the bickering, quit the cussing and get back to the subject at hand. If it starts back up, the thread will get locked.

[Arns85GT]

Thanks Brad for getting involved. I really didn't think that as a 'Newbie', the 'Gerbil' epitaph would cause such offense. Sorry about that. That wasn't my intention to make any personal assessment.

I still am kind of in the dark on the hp potential in the application.

I know that the 390 cfm is very capable of hp and that the high output heads for the 2.8 are limited. I am doing my build one step at a time. Exhaust, spark, and intake, before openning up the engine. Edelbrock is not too helpful. The torque chart they give is only with the Performer Plus package, and makes no hp reference. I have estimates ranging from 15 hp to 28 hp in performance gains using the Holley/Torker II combo. It seems nobody has a dyno figure or anything close to try to estimate where the build will end up.

I think my 140 hp will go to about 175 with the mods I am doing which includes, as I said, exhaust and ignition work as well as the carb setup.

The exhaust work is by all accounts worth 8-10 hp in my application. The wild card is how the 4 barrel actually impacts on the 2.8.

I hope somebody knows, but if they don't I guess I'll find out at the track.

Cheers.

Arn

[donk_316]

that carb intake and a crane h272 cam will see 230hp on a 3.4L

Thats all I know

[Kreb]

How do you know? I've heard that intake and carb is good for 190 HP. You're saying that the cam will add 40 HP? If so, will it idle?